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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qfont.h"
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#include "qdebug.h"
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#include "qpaintdevice.h"
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#include "qfontdatabase.h"
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#include "qfontmetrics.h"
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#include "qfontinfo.h"
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#include "qpainter.h"
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#include "qhash.h"
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#include "qdatastream.h"
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#include "qapplication.h"
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#include "qstringlist.h"
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#include "qthread.h"
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#include "qthreadstorage.h"
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#include <private/qunicodetables_p.h>
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#include "qfont_p.h"
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#include <private/qfontengine_p.h>
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#include <private/qpainter_p.h>
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#include <private/qtextengine_p.h>
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#include <limits.h>
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#ifdef Q_WS_X11
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#include "qx11info_x11.h"
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#include <private/qt_x11_p.h>
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#endif
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#ifdef Q_WS_QWS
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#include "qscreen_qws.h"
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#if !defined(QT_NO_QWS_QPF2)
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#include <qfile.h>
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#include "qfontengine_qpf_p.h"
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#endif
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#endif
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#ifdef Q_OS_SYMBIAN
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#include "qt_s60_p.h"
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#endif
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#include <QMutexLocker>
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// #define QFONTCACHE_DEBUG
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#ifdef QFONTCACHE_DEBUG
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# define FC_DEBUG qDebug
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#else
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# define FC_DEBUG if (false) qDebug
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#endif
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QT_BEGIN_NAMESPACE
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#ifdef Q_WS_WIN
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extern HDC shared_dc();
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#endif
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#ifdef Q_WS_X11
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extern const QX11Info *qt_x11Info(const QPaintDevice *pd);
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#endif
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bool QFontDef::exactMatch(const QFontDef &other) const
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{
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/*
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QFontDef comparison is more complicated than just simple
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per-member comparisons.
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When comparing point/pixel sizes, either point or pixelsize
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could be -1. in This case we have to compare the non negative
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size value.
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This test will fail if the point-sizes differ by 1/2 point or
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more or they do not round to the same value. We have to do this
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since our API still uses 'int' point-sizes in the API, but store
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deci-point-sizes internally.
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To compare the family members, we need to parse the font names
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and compare the family/foundry strings separately. This allows
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us to compare e.g. "Helvetica" and "Helvetica [Adobe]" with
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positive results.
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*/
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if (pixelSize != -1 && other.pixelSize != -1) {
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if (pixelSize != other.pixelSize)
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return false;
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} else if (pointSize != -1 && other.pointSize != -1) {
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if (pointSize != other.pointSize)
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return false;
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} else {
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return false;
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}
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if (!ignorePitch && !other.ignorePitch && fixedPitch != other.fixedPitch)
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return false;
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if (stretch != 0 && other.stretch != 0 && stretch != other.stretch)
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return false;
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QString this_family, this_foundry, other_family, other_foundry;
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QFontDatabase::parseFontName(family, this_foundry, this_family);
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QFontDatabase::parseFontName(other.family, other_foundry, other_family);
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return (styleHint == other.styleHint
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&& styleStrategy == other.styleStrategy
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&& weight == other.weight
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&& style == other.style
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&& this_family == other_family
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&& (this_foundry.isEmpty()
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|| other_foundry.isEmpty()
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|| this_foundry == other_foundry)
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#ifdef Q_WS_X11
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&& addStyle == other.addStyle
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#endif // Q_WS_X11
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);
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}
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extern bool qt_is_gui_used;
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Q_GUI_EXPORT int qt_defaultDpiX()
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{
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if (!qt_is_gui_used)
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return 75;
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int dpi;
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#ifdef Q_WS_X11
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dpi = QX11Info::appDpiX();
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#elif defined(Q_WS_WIN)
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dpi = GetDeviceCaps(shared_dc(),LOGPIXELSX);
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#elif defined(Q_WS_MAC)
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extern float qt_mac_defaultDpi_x(); //qpaintdevice_mac.cpp
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dpi = qt_mac_defaultDpi_x();
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#elif defined(Q_WS_QWS)
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if (!qt_screen)
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return 72;
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QScreen *screen = qt_screen;
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const QList<QScreen*> subScreens = qt_screen->subScreens();
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if (!subScreens.isEmpty())
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screen = subScreens.at(0);
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dpi = qRound(screen->width() / (screen->physicalWidth() / qreal(25.4)));
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#elif defined(Q_OS_SYMBIAN)
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dpi = S60->defaultDpiX;
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#endif // Q_WS_X11
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return dpi;
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}
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Q_GUI_EXPORT int qt_defaultDpiY()
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{
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if (!qt_is_gui_used)
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return 75;
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int dpi;
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#ifdef Q_WS_X11
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dpi = QX11Info::appDpiY();
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#elif defined(Q_WS_WIN)
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dpi = GetDeviceCaps(shared_dc(),LOGPIXELSY);
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#elif defined(Q_WS_MAC)
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extern float qt_mac_defaultDpi_y(); //qpaintdevice_mac.cpp
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dpi = qt_mac_defaultDpi_y();
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#elif defined(Q_WS_QWS)
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if (!qt_screen)
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return 72;
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QScreen *screen = qt_screen;
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const QList<QScreen*> subScreens = qt_screen->subScreens();
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if (!subScreens.isEmpty())
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screen = subScreens.at(0);
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dpi = qRound(screen->height() / (screen->physicalHeight() / qreal(25.4)));
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#elif defined(Q_OS_SYMBIAN)
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dpi = S60->defaultDpiY;
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#endif // Q_WS_X11
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return dpi;
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}
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Q_GUI_EXPORT int qt_defaultDpi()
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{
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return qt_defaultDpiY();
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}
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QFontPrivate::QFontPrivate()
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: engineData(0), dpi(qt_defaultDpi()), screen(0),
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rawMode(false), underline(false), overline(false), strikeOut(false), kerning(true),
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capital(0), letterSpacingIsAbsolute(false), scFont(0)
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{
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#ifdef Q_WS_X11
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if (QX11Info::display())
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screen = QX11Info::appScreen();
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else
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screen = 0;
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#endif
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#ifdef Q_WS_WIN
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hdc = 0;
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#endif
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}
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QFontPrivate::QFontPrivate(const QFontPrivate &other)
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: request(other.request), engineData(0), dpi(other.dpi), screen(other.screen),
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rawMode(other.rawMode), underline(other.underline), overline(other.overline),
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strikeOut(other.strikeOut), kerning(other.kerning),
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capital(other.capital), letterSpacingIsAbsolute(other.letterSpacingIsAbsolute),
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letterSpacing(other.letterSpacing), wordSpacing(other.wordSpacing),
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scFont(other.scFont)
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{
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#ifdef Q_WS_WIN
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hdc = other.hdc;
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#endif
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if (scFont && scFont != this)
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scFont->ref.ref();
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}
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QFontPrivate::~QFontPrivate()
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{
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if (engineData)
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engineData->ref.deref();
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engineData = 0;
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if (scFont && scFont != this)
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scFont->ref.deref();
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scFont = 0;
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}
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#if !defined(Q_WS_MAC)
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extern QMutex *qt_fontdatabase_mutex();
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QFontEngine *QFontPrivate::engineForScript(int script) const
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{
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QMutexLocker locker(qt_fontdatabase_mutex());
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if (script >= QUnicodeTables::Inherited)
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script = QUnicodeTables::Common;
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if (engineData && engineData->fontCache != QFontCache::instance()) {
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// throw out engineData that came from a different thread
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engineData->ref.deref();
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engineData = 0;
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}
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if (!engineData || !engineData->engines[script])
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QFontDatabase::load(this, script);
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return engineData->engines[script];
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}
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#else
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QFontEngine *QFontPrivate::engineForScript(int script) const
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{
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extern QMutex *qt_fontdatabase_mutex();
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QMutexLocker locker(qt_fontdatabase_mutex());
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if (script >= QUnicodeTables::Inherited)
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script = QUnicodeTables::Common;
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if (engineData && engineData->fontCache != QFontCache::instance()) {
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// throw out engineData that came from a different thread
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engineData->ref.deref();
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engineData = 0;
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}
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if (!engineData || !engineData->engine)
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QFontDatabase::load(this, script);
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return engineData->engine;
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}
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#endif
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void QFontPrivate::alterCharForCapitalization(QChar &c) const {
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switch (capital) {
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case QFont::AllUppercase:
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case QFont::SmallCaps:
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c = c.toUpper();
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break;
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case QFont::AllLowercase:
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c = c.toLower();
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break;
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case QFont::MixedCase:
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break;
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}
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}
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QFontPrivate *QFontPrivate::smallCapsFontPrivate() const
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{
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if (scFont)
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return scFont;
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QFont font(const_cast<QFontPrivate *>(this));
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qreal pointSize = font.pointSizeF();
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if (pointSize > 0)
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font.setPointSizeF(pointSize * .7);
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else
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font.setPixelSize((font.pixelSize() * 7 + 5) / 10);
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scFont = font.d.data();
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if (scFont != this)
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scFont->ref.ref();
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return scFont;
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}
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void QFontPrivate::resolve(uint mask, const QFontPrivate *other)
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{
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Q_ASSERT(other != 0);
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dpi = other->dpi;
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if ((mask & QFont::AllPropertiesResolved) == QFont::AllPropertiesResolved) return;
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// assign the unset-bits with the set-bits of the other font def
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if (! (mask & QFont::FamilyResolved))
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request.family = other->request.family;
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if (! (mask & QFont::SizeResolved)) {
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request.pointSize = other->request.pointSize;
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request.pixelSize = other->request.pixelSize;
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}
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if (! (mask & QFont::StyleHintResolved))
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request.styleHint = other->request.styleHint;
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if (! (mask & QFont::StyleStrategyResolved))
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request.styleStrategy = other->request.styleStrategy;
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if (! (mask & QFont::WeightResolved))
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request.weight = other->request.weight;
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if (! (mask & QFont::StyleResolved))
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request.style = other->request.style;
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if (! (mask & QFont::FixedPitchResolved))
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request.fixedPitch = other->request.fixedPitch;
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if (! (mask & QFont::StretchResolved))
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request.stretch = other->request.stretch;
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if (! (mask & QFont::UnderlineResolved))
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underline = other->underline;
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if (! (mask & QFont::OverlineResolved))
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overline = other->overline;
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if (! (mask & QFont::StrikeOutResolved))
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strikeOut = other->strikeOut;
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if (! (mask & QFont::KerningResolved))
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kerning = other->kerning;
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if (! (mask & QFont::LetterSpacingResolved)) {
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letterSpacing = other->letterSpacing;
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letterSpacingIsAbsolute = other->letterSpacingIsAbsolute;
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}
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if (! (mask & QFont::WordSpacingResolved))
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wordSpacing = other->wordSpacing;
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if (! (mask & QFont::CapitalizationResolved))
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capital = other->capital;
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}
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378 |
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379 |
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380 |
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381 |
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382 |
QFontEngineData::QFontEngineData()
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: ref(1), fontCache(QFontCache::instance())
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|
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{
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#if !defined(Q_WS_MAC)
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memset(engines, 0, QUnicodeTables::ScriptCount * sizeof(QFontEngine *));
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#else
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engine = 0;
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#endif
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}
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QFontEngineData::~QFontEngineData()
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{
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#if !defined(Q_WS_MAC)
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395 |
for (int i = 0; i < QUnicodeTables::ScriptCount; ++i) {
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|
396 |
if (engines[i])
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engines[i]->ref.deref();
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engines[i] = 0;
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}
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#else
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if (engine)
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engine->ref.deref();
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engine = 0;
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|
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#endif // Q_WS_X11 || Q_WS_WIN || Q_WS_MAC
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|
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}
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|
406 |
|
|
407 |
|
|
408 |
|
|
409 |
|
|
410 |
/*!
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|
411 |
\class QFont
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|
412 |
\reentrant
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|
413 |
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|
414 |
\brief The QFont class specifies a font used for drawing text.
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|
415 |
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|
416 |
\ingroup painting
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|
417 |
\ingroup appearance
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|
418 |
\ingroup shared
|
|
419 |
\ingroup richtext-processing
|
|
420 |
|
|
421 |
|
|
422 |
When you create a QFont object you specify various attributes that
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|
423 |
you want the font to have. Qt will use the font with the specified
|
|
424 |
attributes, or if no matching font exists, Qt will use the closest
|
|
425 |
matching installed font. The attributes of the font that is
|
|
426 |
actually used are retrievable from a QFontInfo object. If the
|
|
427 |
window system provides an exact match exactMatch() returns true.
|
|
428 |
Use QFontMetrics to get measurements, e.g. the pixel length of a
|
|
429 |
string using QFontMetrics::width().
|
|
430 |
|
|
431 |
Note that a QApplication instance must exist before a QFont can be
|
|
432 |
used. You can set the application's default font with
|
|
433 |
QApplication::setFont().
|
|
434 |
|
|
435 |
If a chosen font does not include all the characters that
|
|
436 |
need to be displayed, QFont will try to find the characters in the
|
|
437 |
nearest equivalent fonts. When a QPainter draws a character from a
|
|
438 |
font the QFont will report whether or not it has the character; if
|
|
439 |
it does not, QPainter will draw an unfilled square.
|
|
440 |
|
|
441 |
Create QFonts like this:
|
|
442 |
|
|
443 |
\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 0
|
|
444 |
|
|
445 |
The attributes set in the constructor can also be set later, e.g.
|
|
446 |
setFamily(), setPointSize(), setPointSizeFloat(), setWeight() and
|
|
447 |
setItalic(). The remaining attributes must be set after
|
|
448 |
contstruction, e.g. setBold(), setUnderline(), setOverline(),
|
|
449 |
setStrikeOut() and setFixedPitch(). QFontInfo objects should be
|
|
450 |
created \e after the font's attributes have been set. A QFontInfo
|
|
451 |
object will not change, even if you change the font's
|
|
452 |
attributes. The corresponding "get" functions, e.g. family(),
|
|
453 |
pointSize(), etc., return the values that were set, even though
|
|
454 |
the values used may differ. The actual values are available from a
|
|
455 |
QFontInfo object.
|
|
456 |
|
|
457 |
If the requested font family is unavailable you can influence the
|
|
458 |
\link #fontmatching font matching algorithm\endlink by choosing a
|
|
459 |
particular \l{QFont::StyleHint} and \l{QFont::StyleStrategy} with
|
|
460 |
setStyleHint(). The default family (corresponding to the current
|
|
461 |
style hint) is returned by defaultFamily().
|
|
462 |
|
|
463 |
The font-matching algorithm has a lastResortFamily() and
|
|
464 |
lastResortFont() in cases where a suitable match cannot be found.
|
|
465 |
You can provide substitutions for font family names using
|
|
466 |
insertSubstitution() and insertSubstitutions(). Substitutions can
|
|
467 |
be removed with removeSubstitution(). Use substitute() to retrieve
|
|
468 |
a family's first substitute, or the family name itself if it has
|
|
469 |
no substitutes. Use substitutes() to retrieve a list of a family's
|
|
470 |
substitutes (which may be empty).
|
|
471 |
|
|
472 |
Every QFont has a key() which you can use, for example, as the key
|
|
473 |
in a cache or dictionary. If you want to store a user's font
|
|
474 |
preferences you could use QSettings, writing the font information
|
|
475 |
with toString() and reading it back with fromString(). The
|
|
476 |
operator<<() and operator>>() functions are also available, but
|
|
477 |
they work on a data stream.
|
|
478 |
|
|
479 |
It is possible to set the height of characters shown on the screen
|
|
480 |
to a specified number of pixels with setPixelSize(); however using
|
|
481 |
setPointSize() has a similar effect and provides device
|
|
482 |
independence.
|
|
483 |
|
|
484 |
In X11 you can set a font using its system
|
|
485 |
specific name with setRawName().
|
|
486 |
|
|
487 |
Loading fonts can be expensive, especially on X11. QFont contains
|
|
488 |
extensive optimizations to make the copying of QFont objects fast,
|
|
489 |
and to cache the results of the slow window system functions it
|
|
490 |
depends upon.
|
|
491 |
|
|
492 |
\target fontmatching
|
|
493 |
The font matching algorithm works as follows:
|
|
494 |
\list 1
|
|
495 |
\o The specified font family is searched for.
|
|
496 |
\o If not found, the styleHint() is used to select a replacement
|
|
497 |
family.
|
|
498 |
\o Each replacement font family is searched for.
|
|
499 |
\o If none of these are found or there was no styleHint(), "helvetica"
|
|
500 |
will be searched for.
|
|
501 |
\o If "helvetica" isn't found Qt will try the lastResortFamily().
|
|
502 |
\o If the lastResortFamily() isn't found Qt will try the
|
|
503 |
lastResortFont() which will always return a name of some kind.
|
|
504 |
\endlist
|
|
505 |
|
|
506 |
Note that the actual font matching algorithm varies from platform to platform.
|
|
507 |
|
|
508 |
In Windows a request for the "Courier" font is automatically changed to
|
|
509 |
"Courier New", an improved version of Courier that allows for smooth scaling.
|
|
510 |
The older "Courier" bitmap font can be selected by setting the PreferBitmap
|
|
511 |
style strategy (see setStyleStrategy()).
|
|
512 |
|
|
513 |
Once a font is found, the remaining attributes are matched in order of
|
|
514 |
priority:
|
|
515 |
\list 1
|
|
516 |
\o fixedPitch()
|
|
517 |
\o pointSize() (see below)
|
|
518 |
\o weight()
|
|
519 |
\o style()
|
|
520 |
\endlist
|
|
521 |
|
|
522 |
If you have a font which matches on family, even if none of the
|
|
523 |
other attributes match, this font will be chosen in preference to
|
|
524 |
a font which doesn't match on family but which does match on the
|
|
525 |
other attributes. This is because font family is the dominant
|
|
526 |
search criteria.
|
|
527 |
|
|
528 |
The point size is defined to match if it is within 20% of the
|
|
529 |
requested point size. When several fonts match and are only
|
|
530 |
distinguished by point size, the font with the closest point size
|
|
531 |
to the one requested will be chosen.
|
|
532 |
|
|
533 |
The actual family, font size, weight and other font attributes
|
|
534 |
used for drawing text will depend on what's available for the
|
|
535 |
chosen family under the window system. A QFontInfo object can be
|
|
536 |
used to determine the actual values used for drawing the text.
|
|
537 |
|
|
538 |
Examples:
|
|
539 |
|
|
540 |
\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 1
|
|
541 |
If you had both an Adobe and a Cronyx Helvetica, you might get
|
|
542 |
either.
|
|
543 |
|
|
544 |
\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 2
|
|
545 |
|
|
546 |
You can specify the foundry you want in the family name. The font f
|
|
547 |
in the above example will be set to "Helvetica
|
|
548 |
[Cronyx]".
|
|
549 |
|
|
550 |
To determine the attributes of the font actually used in the window
|
|
551 |
system, use a QFontInfo object, e.g.
|
|
552 |
|
|
553 |
\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 3
|
|
554 |
|
|
555 |
To find out font metrics use a QFontMetrics object, e.g.
|
|
556 |
|
|
557 |
\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 4
|
|
558 |
|
|
559 |
For more general information on fonts, see the
|
|
560 |
\link http://nwalsh.com/comp.fonts/FAQ/ comp.fonts FAQ.\endlink
|
|
561 |
Information on encodings can be found from
|
|
562 |
\link http://czyborra.com/ Roman Czyborra's\endlink page.
|
|
563 |
|
|
564 |
\sa QFontComboBox, QFontMetrics, QFontInfo, QFontDatabase, {Character Map Example}
|
|
565 |
*/
|
|
566 |
|
|
567 |
/*!
|
|
568 |
\internal
|
|
569 |
\enum QFont::ResolveProperties
|
|
570 |
|
|
571 |
This enum describes the properties of a QFont that can be set on a font
|
|
572 |
individually and then considered resolved.
|
|
573 |
|
|
574 |
\value FamilyResolved
|
|
575 |
\value SizeResolved
|
|
576 |
\value StyleHintResolved
|
|
577 |
\value StyleStrategyResolved
|
|
578 |
\value WeightResolved
|
|
579 |
\value StyleResolved
|
|
580 |
\value UnderlineResolved
|
|
581 |
\value OverlineResolved
|
|
582 |
\value StrikeOutResolved
|
|
583 |
\value FixedPitchResolved
|
|
584 |
\value StretchResolved
|
|
585 |
\value KerningResolved
|
|
586 |
\value CapitalizationResolved
|
|
587 |
\value LetterSpacingResolved
|
|
588 |
\value WordSpacingResolved
|
|
589 |
\value CompletelyResolved
|
|
590 |
*/
|
|
591 |
|
|
592 |
/*!
|
|
593 |
\enum QFont::Style
|
|
594 |
|
|
595 |
This enum describes the different styles of glyphs that are used to
|
|
596 |
display text.
|
|
597 |
|
|
598 |
\value StyleNormal Normal glyphs used in unstyled text.
|
|
599 |
\value StyleItalic Italic glyphs that are specifically designed for
|
|
600 |
the purpose of representing italicized text.
|
|
601 |
\value StyleOblique Glyphs with an italic appearance that are typically
|
|
602 |
based on the unstyled glyphs, but are not fine-tuned
|
|
603 |
for the purpose of representing italicized text.
|
|
604 |
|
|
605 |
\sa Weight
|
|
606 |
*/
|
|
607 |
|
|
608 |
/*!
|
|
609 |
\fn Qt::HANDLE QFont::handle() const
|
|
610 |
|
|
611 |
Returns the window system handle to the font, for low-level
|
|
612 |
access. Using this function is \e not portable.
|
|
613 |
*/
|
|
614 |
|
|
615 |
/*!
|
|
616 |
\fn FT_Face QFont::freetypeFace() const
|
|
617 |
|
|
618 |
Returns the handle to the primary FreeType face of the font. If font merging is not disabled a
|
|
619 |
QFont can contain several physical fonts.
|
|
620 |
|
|
621 |
Returns 0 if the font does not contain a FreeType face.
|
|
622 |
|
|
623 |
\note This function is only available on platforms that provide the FreeType library;
|
|
624 |
i.e., X11 and some Embedded Linux platforms.
|
|
625 |
*/
|
|
626 |
|
|
627 |
/*!
|
|
628 |
\fn QString QFont::rawName() const
|
|
629 |
|
|
630 |
Returns the name of the font within the underlying window system.
|
|
631 |
|
|
632 |
Only on X11 when Qt was built without FontConfig support the XLFD (X Logical Font Description)
|
|
633 |
is returned; otherwise an empty string.
|
|
634 |
|
|
635 |
Using the return value of this function is usually \e not \e
|
|
636 |
portable.
|
|
637 |
|
|
638 |
\sa setRawName()
|
|
639 |
*/
|
|
640 |
|
|
641 |
/*!
|
|
642 |
\fn void QFont::setRawName(const QString &name)
|
|
643 |
|
|
644 |
Sets a font by its system specific name. The function is
|
|
645 |
particularly useful under X, where system font settings (for
|
|
646 |
example X resources) are usually available in XLFD (X Logical Font
|
|
647 |
Description) form only. You can pass an XLFD as \a name to this
|
|
648 |
function.
|
|
649 |
|
|
650 |
A font set with setRawName() is still a full-featured QFont. It can
|
|
651 |
be queried (for example with italic()) or modified (for example with
|
|
652 |
setItalic()) and is therefore also suitable for rendering rich text.
|
|
653 |
|
|
654 |
If Qt's internal font database cannot resolve the raw name, the
|
|
655 |
font becomes a raw font with \a name as its family.
|
|
656 |
|
|
657 |
Note that the present implementation does not handle wildcards in
|
|
658 |
XLFDs well, and that font aliases (file \c fonts.alias in the font
|
|
659 |
directory on X11) are not supported.
|
|
660 |
|
|
661 |
\sa rawName(), setRawMode(), setFamily()
|
|
662 |
*/
|
|
663 |
|
|
664 |
/*!
|
|
665 |
\fn QString QFont::lastResortFamily() const
|
|
666 |
|
|
667 |
Returns the "last resort" font family name.
|
|
668 |
|
|
669 |
The current implementation tries a wide variety of common fonts,
|
|
670 |
returning the first one it finds. Is is possible that no family is
|
|
671 |
found in which case an empty string is returned.
|
|
672 |
|
|
673 |
\sa lastResortFont()
|
|
674 |
*/
|
|
675 |
|
|
676 |
/*!
|
|
677 |
\fn QString QFont::defaultFamily() const
|
|
678 |
|
|
679 |
Returns the family name that corresponds to the current style
|
|
680 |
hint.
|
|
681 |
|
|
682 |
\sa StyleHint styleHint() setStyleHint()
|
|
683 |
*/
|
|
684 |
|
|
685 |
/*!
|
|
686 |
\fn QString QFont::lastResortFont() const
|
|
687 |
|
|
688 |
Returns a "last resort" font name for the font matching algorithm.
|
|
689 |
This is used if the last resort family is not available. It will
|
|
690 |
always return a name, if necessary returning something like
|
|
691 |
"fixed" or "system".
|
|
692 |
|
|
693 |
The current implementation tries a wide variety of common fonts,
|
|
694 |
returning the first one it finds. The implementation may change
|
|
695 |
at any time, but this function will always return a string
|
|
696 |
containing something.
|
|
697 |
|
|
698 |
It is theoretically possible that there really isn't a
|
|
699 |
lastResortFont() in which case Qt will abort with an error
|
|
700 |
message. We have not been able to identify a case where this
|
|
701 |
happens. Please \link bughowto.html report it as a bug\endlink if
|
|
702 |
it does, preferably with a list of the fonts you have installed.
|
|
703 |
|
|
704 |
\sa lastResortFamily() rawName()
|
|
705 |
*/
|
|
706 |
|
|
707 |
/*!
|
|
708 |
Constructs a font from \a font for use on the paint device \a pd.
|
|
709 |
*/
|
|
710 |
QFont::QFont(const QFont &font, QPaintDevice *pd)
|
|
711 |
: resolve_mask(font.resolve_mask)
|
|
712 |
{
|
|
713 |
Q_ASSERT(pd != 0);
|
|
714 |
int dpi = pd->logicalDpiY();
|
|
715 |
#ifdef Q_WS_X11
|
|
716 |
const QX11Info *info = qt_x11Info(pd);
|
|
717 |
int screen = info ? info->screen() : 0;
|
|
718 |
#else
|
|
719 |
const int screen = 0;
|
|
720 |
#endif
|
|
721 |
if (font.d->dpi != dpi || font.d->screen != screen ) {
|
|
722 |
d = new QFontPrivate(*font.d);
|
|
723 |
d->dpi = dpi;
|
|
724 |
d->screen = screen;
|
|
725 |
} else {
|
|
726 |
d = font.d.data();
|
|
727 |
}
|
|
728 |
#ifdef Q_WS_WIN
|
|
729 |
if (pd->devType() == QInternal::Printer && pd->getDC())
|
|
730 |
d->hdc = pd->getDC();
|
|
731 |
#endif
|
|
732 |
}
|
|
733 |
|
|
734 |
/*!
|
|
735 |
\internal
|
|
736 |
*/
|
|
737 |
QFont::QFont(QFontPrivate *data)
|
|
738 |
: d(data), resolve_mask(QFont::AllPropertiesResolved)
|
|
739 |
{
|
|
740 |
}
|
|
741 |
|
|
742 |
/*! \internal
|
|
743 |
Detaches the font object from common font data.
|
|
744 |
*/
|
|
745 |
void QFont::detach()
|
|
746 |
{
|
|
747 |
if (d->ref == 1) {
|
|
748 |
if (d->engineData)
|
|
749 |
d->engineData->ref.deref();
|
|
750 |
d->engineData = 0;
|
|
751 |
if (d->scFont && d->scFont != d.data())
|
|
752 |
d->scFont->ref.deref();
|
|
753 |
d->scFont = 0;
|
|
754 |
return;
|
|
755 |
}
|
|
756 |
|
|
757 |
d.detach();
|
|
758 |
}
|
|
759 |
|
|
760 |
/*!
|
|
761 |
Constructs a font object that uses the application's default font.
|
|
762 |
|
|
763 |
\sa QApplication::setFont(), QApplication::font()
|
|
764 |
*/
|
|
765 |
QFont::QFont()
|
|
766 |
: d(QApplication::font().d.data()), resolve_mask(0)
|
|
767 |
{
|
|
768 |
}
|
|
769 |
|
|
770 |
/*!
|
|
771 |
Constructs a font object with the specified \a family, \a
|
|
772 |
pointSize, \a weight and \a italic settings.
|
|
773 |
|
|
774 |
If \a pointSize is zero or negative, the point size of the font
|
|
775 |
is set to a system-dependent default value. Generally, this is
|
|
776 |
12 points, except on Symbian where it is 7 points.
|
|
777 |
|
|
778 |
The \a family name may optionally also include a foundry name,
|
|
779 |
e.g. "Helvetica [Cronyx]". If the \a family is
|
|
780 |
available from more than one foundry and the foundry isn't
|
|
781 |
specified, an arbitrary foundry is chosen. If the family isn't
|
|
782 |
available a family will be set using the \l{QFont}{font matching}
|
|
783 |
algorithm.
|
|
784 |
|
|
785 |
\sa Weight, setFamily(), setPointSize(), setWeight(), setItalic(),
|
|
786 |
setStyleHint() QApplication::font()
|
|
787 |
*/
|
|
788 |
QFont::QFont(const QString &family, int pointSize, int weight, bool italic)
|
|
789 |
: d(new QFontPrivate()), resolve_mask(QFont::FamilyResolved)
|
|
790 |
{
|
|
791 |
if (pointSize <= 0) {
|
|
792 |
#ifdef Q_OS_SYMBIAN
|
|
793 |
pointSize = 7;
|
|
794 |
#else
|
|
795 |
pointSize = 12;
|
|
796 |
#endif
|
|
797 |
} else {
|
|
798 |
resolve_mask |= QFont::SizeResolved;
|
|
799 |
}
|
|
800 |
|
|
801 |
if (weight < 0) {
|
|
802 |
weight = Normal;
|
|
803 |
} else {
|
|
804 |
resolve_mask |= QFont::WeightResolved | QFont::StyleResolved;
|
|
805 |
}
|
|
806 |
|
|
807 |
d->request.family = family;
|
|
808 |
d->request.pointSize = qreal(pointSize);
|
|
809 |
d->request.pixelSize = -1;
|
|
810 |
d->request.weight = weight;
|
|
811 |
d->request.style = italic ? QFont::StyleItalic : QFont::StyleNormal;
|
|
812 |
}
|
|
813 |
|
|
814 |
/*!
|
|
815 |
Constructs a font that is a copy of \a font.
|
|
816 |
*/
|
|
817 |
QFont::QFont(const QFont &font)
|
|
818 |
: d(font.d.data()), resolve_mask(font.resolve_mask)
|
|
819 |
{
|
|
820 |
}
|
|
821 |
|
|
822 |
/*!
|
|
823 |
Destroys the font object and frees all allocated resources.
|
|
824 |
*/
|
|
825 |
QFont::~QFont()
|
|
826 |
{
|
|
827 |
}
|
|
828 |
|
|
829 |
/*!
|
|
830 |
Assigns \a font to this font and returns a reference to it.
|
|
831 |
*/
|
|
832 |
QFont &QFont::operator=(const QFont &font)
|
|
833 |
{
|
|
834 |
d = font.d.data();
|
|
835 |
resolve_mask = font.resolve_mask;
|
|
836 |
return *this;
|
|
837 |
}
|
|
838 |
|
|
839 |
/*!
|
|
840 |
Returns the requested font family name, i.e. the name set in the
|
|
841 |
constructor or the last setFont() call.
|
|
842 |
|
|
843 |
\sa setFamily() substitutes() substitute()
|
|
844 |
*/
|
|
845 |
QString QFont::family() const
|
|
846 |
{
|
|
847 |
return d->request.family;
|
|
848 |
}
|
|
849 |
|
|
850 |
/*!
|
|
851 |
Sets the family name of the font. The name is case insensitive and
|
|
852 |
may include a foundry name.
|
|
853 |
|
|
854 |
The \a family name may optionally also include a foundry name,
|
|
855 |
e.g. "Helvetica [Cronyx]". If the \a family is
|
|
856 |
available from more than one foundry and the foundry isn't
|
|
857 |
specified, an arbitrary foundry is chosen. If the family isn't
|
|
858 |
available a family will be set using the \l{QFont}{font matching}
|
|
859 |
algorithm.
|
|
860 |
|
|
861 |
\sa family(), setStyleHint(), QFontInfo
|
|
862 |
*/
|
|
863 |
void QFont::setFamily(const QString &family)
|
|
864 |
{
|
|
865 |
detach();
|
|
866 |
|
|
867 |
d->request.family = family;
|
|
868 |
#if defined(Q_WS_X11)
|
|
869 |
d->request.addStyle.clear();
|
|
870 |
#endif // Q_WS_X11
|
|
871 |
|
|
872 |
resolve_mask |= QFont::FamilyResolved;
|
|
873 |
}
|
|
874 |
|
|
875 |
/*!
|
|
876 |
Returns the point size of the font. Returns -1 if the font size
|
|
877 |
was specified in pixels.
|
|
878 |
|
|
879 |
\sa setPointSize() pointSizeF()
|
|
880 |
*/
|
|
881 |
int QFont::pointSize() const
|
|
882 |
{
|
|
883 |
return qRound(d->request.pointSize);
|
|
884 |
}
|
|
885 |
|
|
886 |
/*!
|
|
887 |
Sets the point size to \a pointSize. The point size must be
|
|
888 |
greater than zero.
|
|
889 |
|
|
890 |
\sa pointSize() setPointSizeF()
|
|
891 |
*/
|
|
892 |
void QFont::setPointSize(int pointSize)
|
|
893 |
{
|
|
894 |
if (pointSize <= 0) {
|
|
895 |
qWarning("QFont::setPointSize: Point size <= 0 (%d), must be greater than 0", pointSize);
|
|
896 |
return;
|
|
897 |
}
|
|
898 |
|
|
899 |
detach();
|
|
900 |
|
|
901 |
d->request.pointSize = qreal(pointSize);
|
|
902 |
d->request.pixelSize = -1;
|
|
903 |
|
|
904 |
resolve_mask |= QFont::SizeResolved;
|
|
905 |
}
|
|
906 |
|
|
907 |
/*!
|
|
908 |
Sets the point size to \a pointSize. The point size must be
|
|
909 |
greater than zero. The requested precision may not be achieved on
|
|
910 |
all platforms.
|
|
911 |
|
|
912 |
\sa pointSizeF() setPointSize() setPixelSize()
|
|
913 |
*/
|
|
914 |
void QFont::setPointSizeF(qreal pointSize)
|
|
915 |
{
|
|
916 |
if (pointSize <= 0) {
|
|
917 |
qWarning("QFont::setPointSizeF: Point size <= 0 (%f), must be greater than 0", pointSize);
|
|
918 |
return;
|
|
919 |
}
|
|
920 |
|
|
921 |
detach();
|
|
922 |
|
|
923 |
d->request.pointSize = pointSize;
|
|
924 |
d->request.pixelSize = -1;
|
|
925 |
|
|
926 |
resolve_mask |= QFont::SizeResolved;
|
|
927 |
}
|
|
928 |
|
|
929 |
/*!
|
|
930 |
Returns the point size of the font. Returns -1 if the font size was
|
|
931 |
specified in pixels.
|
|
932 |
|
|
933 |
\sa pointSize() setPointSizeF() pixelSize() QFontInfo::pointSize() QFontInfo::pixelSize()
|
|
934 |
*/
|
|
935 |
qreal QFont::pointSizeF() const
|
|
936 |
{
|
|
937 |
return d->request.pointSize;
|
|
938 |
}
|
|
939 |
|
|
940 |
/*!
|
|
941 |
Sets the font size to \a pixelSize pixels.
|
|
942 |
|
|
943 |
Using this function makes the font device dependent. Use
|
|
944 |
setPointSize() or setPointSizeF() to set the size of the font
|
|
945 |
in a device independent manner.
|
|
946 |
|
|
947 |
\sa pixelSize()
|
|
948 |
*/
|
|
949 |
void QFont::setPixelSize(int pixelSize)
|
|
950 |
{
|
|
951 |
if (pixelSize <= 0) {
|
|
952 |
qWarning("QFont::setPixelSize: Pixel size <= 0 (%d)", pixelSize);
|
|
953 |
return;
|
|
954 |
}
|
|
955 |
|
|
956 |
detach();
|
|
957 |
|
|
958 |
d->request.pixelSize = pixelSize;
|
|
959 |
d->request.pointSize = -1;
|
|
960 |
|
|
961 |
resolve_mask |= QFont::SizeResolved;
|
|
962 |
}
|
|
963 |
|
|
964 |
/*!
|
|
965 |
Returns the pixel size of the font if it was set with
|
|
966 |
setPixelSize(). Returns -1 if the size was set with setPointSize()
|
|
967 |
or setPointSizeF().
|
|
968 |
|
|
969 |
\sa setPixelSize() pointSize() QFontInfo::pointSize() QFontInfo::pixelSize()
|
|
970 |
*/
|
|
971 |
int QFont::pixelSize() const
|
|
972 |
{
|
|
973 |
return d->request.pixelSize;
|
|
974 |
}
|
|
975 |
|
|
976 |
#ifdef QT3_SUPPORT
|
|
977 |
/*! \obsolete
|
|
978 |
|
|
979 |
Sets the logical pixel height of font characters when shown on
|
|
980 |
the screen to \a pixelSize.
|
|
981 |
*/
|
|
982 |
void QFont::setPixelSizeFloat(qreal pixelSize)
|
|
983 |
{
|
|
984 |
setPixelSize((int)pixelSize);
|
|
985 |
}
|
|
986 |
#endif
|
|
987 |
|
|
988 |
/*!
|
|
989 |
\fn bool QFont::italic() const
|
|
990 |
|
|
991 |
Returns true if the style() of the font is not QFont::StyleNormal
|
|
992 |
|
|
993 |
\sa setItalic() style()
|
|
994 |
*/
|
|
995 |
|
|
996 |
/*!
|
|
997 |
\fn void QFont::setItalic(bool enable)
|
|
998 |
|
|
999 |
Sets the style() of the font to QFont::StyleItalic if \a enable is true;
|
|
1000 |
otherwise the style is set to QFont::StyleNormal.
|
|
1001 |
|
|
1002 |
\sa italic() QFontInfo
|
|
1003 |
*/
|
|
1004 |
|
|
1005 |
/*!
|
|
1006 |
Returns the style of the font.
|
|
1007 |
|
|
1008 |
\sa setStyle()
|
|
1009 |
*/
|
|
1010 |
QFont::Style QFont::style() const
|
|
1011 |
{
|
|
1012 |
return (QFont::Style)d->request.style;
|
|
1013 |
}
|
|
1014 |
|
|
1015 |
|
|
1016 |
/*!
|
|
1017 |
Sets the style of the font to \a style.
|
|
1018 |
|
|
1019 |
\sa italic(), QFontInfo
|
|
1020 |
*/
|
|
1021 |
void QFont::setStyle(Style style)
|
|
1022 |
{
|
|
1023 |
detach();
|
|
1024 |
|
|
1025 |
d->request.style = style;
|
|
1026 |
resolve_mask |= QFont::StyleResolved;
|
|
1027 |
}
|
|
1028 |
|
|
1029 |
/*!
|
|
1030 |
Returns the weight of the font which is one of the enumerated
|
|
1031 |
values from \l{QFont::Weight}.
|
|
1032 |
|
|
1033 |
\sa setWeight(), Weight, QFontInfo
|
|
1034 |
*/
|
|
1035 |
int QFont::weight() const
|
|
1036 |
{
|
|
1037 |
return d->request.weight;
|
|
1038 |
}
|
|
1039 |
|
|
1040 |
/*!
|
|
1041 |
\enum QFont::Weight
|
|
1042 |
|
|
1043 |
Qt uses a weighting scale from 0 to 99 similar to, but not the
|
|
1044 |
same as, the scales used in Windows or CSS. A weight of 0 is
|
|
1045 |
ultralight, whilst 99 will be an extremely black.
|
|
1046 |
|
|
1047 |
This enum contains the predefined font weights:
|
|
1048 |
|
|
1049 |
\value Light 25
|
|
1050 |
\value Normal 50
|
|
1051 |
\value DemiBold 63
|
|
1052 |
\value Bold 75
|
|
1053 |
\value Black 87
|
|
1054 |
*/
|
|
1055 |
|
|
1056 |
/*!
|
|
1057 |
Sets the weight the font to \a weight, which should be a value
|
|
1058 |
from the \l QFont::Weight enumeration.
|
|
1059 |
|
|
1060 |
\sa weight(), QFontInfo
|
|
1061 |
*/
|
|
1062 |
void QFont::setWeight(int weight)
|
|
1063 |
{
|
|
1064 |
Q_ASSERT_X(weight >= 0 && weight <= 99, "QFont::setWeight", "Weight must be between 0 and 99");
|
|
1065 |
|
|
1066 |
detach();
|
|
1067 |
|
|
1068 |
d->request.weight = weight;
|
|
1069 |
resolve_mask |= QFont::WeightResolved;
|
|
1070 |
}
|
|
1071 |
|
|
1072 |
/*!
|
|
1073 |
\fn bool QFont::bold() const
|
|
1074 |
|
|
1075 |
Returns true if weight() is a value greater than \link Weight
|
|
1076 |
QFont::Normal \endlink; otherwise returns false.
|
|
1077 |
|
|
1078 |
\sa weight(), setBold(), QFontInfo::bold()
|
|
1079 |
*/
|
|
1080 |
|
|
1081 |
/*!
|
|
1082 |
\fn void QFont::setBold(bool enable)
|
|
1083 |
|
|
1084 |
If \a enable is true sets the font's weight to \link Weight
|
|
1085 |
QFont::Bold \endlink; otherwise sets the weight to \link Weight
|
|
1086 |
QFont::Normal\endlink.
|
|
1087 |
|
|
1088 |
For finer boldness control use setWeight().
|
|
1089 |
|
|
1090 |
\sa bold(), setWeight()
|
|
1091 |
*/
|
|
1092 |
|
|
1093 |
/*!
|
|
1094 |
Returns true if underline has been set; otherwise returns false.
|
|
1095 |
|
|
1096 |
\sa setUnderline()
|
|
1097 |
*/
|
|
1098 |
bool QFont::underline() const
|
|
1099 |
{
|
|
1100 |
return d->underline;
|
|
1101 |
}
|
|
1102 |
|
|
1103 |
/*!
|
|
1104 |
If \a enable is true, sets underline on; otherwise sets underline
|
|
1105 |
off.
|
|
1106 |
|
|
1107 |
\sa underline(), QFontInfo
|
|
1108 |
*/
|
|
1109 |
void QFont::setUnderline(bool enable)
|
|
1110 |
{
|
|
1111 |
detach();
|
|
1112 |
|
|
1113 |
d->underline = enable;
|
|
1114 |
resolve_mask |= QFont::UnderlineResolved;
|
|
1115 |
}
|
|
1116 |
|
|
1117 |
/*!
|
|
1118 |
Returns true if overline has been set; otherwise returns false.
|
|
1119 |
|
|
1120 |
\sa setOverline()
|
|
1121 |
*/
|
|
1122 |
bool QFont::overline() const
|
|
1123 |
{
|
|
1124 |
return d->overline;
|
|
1125 |
}
|
|
1126 |
|
|
1127 |
/*!
|
|
1128 |
If \a enable is true, sets overline on; otherwise sets overline off.
|
|
1129 |
|
|
1130 |
\sa overline(), QFontInfo
|
|
1131 |
*/
|
|
1132 |
void QFont::setOverline(bool enable)
|
|
1133 |
{
|
|
1134 |
detach();
|
|
1135 |
|
|
1136 |
d->overline = enable;
|
|
1137 |
resolve_mask |= QFont::OverlineResolved;
|
|
1138 |
}
|
|
1139 |
|
|
1140 |
/*!
|
|
1141 |
Returns true if strikeout has been set; otherwise returns false.
|
|
1142 |
|
|
1143 |
\sa setStrikeOut()
|
|
1144 |
*/
|
|
1145 |
bool QFont::strikeOut() const
|
|
1146 |
{
|
|
1147 |
return d->strikeOut;
|
|
1148 |
}
|
|
1149 |
|
|
1150 |
/*!
|
|
1151 |
If \a enable is true, sets strikeout on; otherwise sets strikeout
|
|
1152 |
off.
|
|
1153 |
|
|
1154 |
\sa strikeOut(), QFontInfo
|
|
1155 |
*/
|
|
1156 |
void QFont::setStrikeOut(bool enable)
|
|
1157 |
{
|
|
1158 |
detach();
|
|
1159 |
|
|
1160 |
d->strikeOut = enable;
|
|
1161 |
resolve_mask |= QFont::StrikeOutResolved;
|
|
1162 |
}
|
|
1163 |
|
|
1164 |
/*!
|
|
1165 |
Returns true if fixed pitch has been set; otherwise returns false.
|
|
1166 |
|
|
1167 |
\sa setFixedPitch(), QFontInfo::fixedPitch()
|
|
1168 |
*/
|
|
1169 |
bool QFont::fixedPitch() const
|
|
1170 |
{
|
|
1171 |
return d->request.fixedPitch;
|
|
1172 |
}
|
|
1173 |
|
|
1174 |
/*!
|
|
1175 |
If \a enable is true, sets fixed pitch on; otherwise sets fixed
|
|
1176 |
pitch off.
|
|
1177 |
|
|
1178 |
\sa fixedPitch(), QFontInfo
|
|
1179 |
*/
|
|
1180 |
void QFont::setFixedPitch(bool enable)
|
|
1181 |
{
|
|
1182 |
detach();
|
|
1183 |
|
|
1184 |
d->request.fixedPitch = enable;
|
|
1185 |
d->request.ignorePitch = false;
|
|
1186 |
resolve_mask |= QFont::FixedPitchResolved;
|
|
1187 |
}
|
|
1188 |
|
|
1189 |
/*!
|
|
1190 |
Returns true if kerning should be used when drawing text with this font.
|
|
1191 |
|
|
1192 |
\sa setKerning()
|
|
1193 |
*/
|
|
1194 |
bool QFont::kerning() const
|
|
1195 |
{
|
|
1196 |
return d->kerning;
|
|
1197 |
}
|
|
1198 |
|
|
1199 |
/*!
|
|
1200 |
Enables kerning for this font if \a enable is true; otherwise
|
|
1201 |
disables it. By default, kerning is enabled.
|
|
1202 |
|
|
1203 |
When kerning is enabled, glyph metrics do not add up anymore,
|
|
1204 |
even for Latin text. In other words, the assumption that
|
|
1205 |
width('a') + width('b') is equal to width("ab") is not
|
|
1206 |
neccesairly true.
|
|
1207 |
|
|
1208 |
\sa kerning(), QFontMetrics
|
|
1209 |
*/
|
|
1210 |
void QFont::setKerning(bool enable)
|
|
1211 |
{
|
|
1212 |
detach();
|
|
1213 |
d->kerning = enable;
|
|
1214 |
resolve_mask |= QFont::KerningResolved;
|
|
1215 |
}
|
|
1216 |
|
|
1217 |
/*!
|
|
1218 |
Returns the StyleStrategy.
|
|
1219 |
|
|
1220 |
The style strategy affects the \l{QFont}{font matching} algorithm.
|
|
1221 |
See \l QFont::StyleStrategy for the list of available strategies.
|
|
1222 |
|
|
1223 |
\sa setStyleHint() QFont::StyleHint
|
|
1224 |
*/
|
|
1225 |
QFont::StyleStrategy QFont::styleStrategy() const
|
|
1226 |
{
|
|
1227 |
return (StyleStrategy) d->request.styleStrategy;
|
|
1228 |
}
|
|
1229 |
|
|
1230 |
/*!
|
|
1231 |
Returns the StyleHint.
|
|
1232 |
|
|
1233 |
The style hint affects the \l{QFont}{font matching} algorithm.
|
|
1234 |
See \l QFont::StyleHint for the list of available hints.
|
|
1235 |
|
|
1236 |
\sa setStyleHint(), QFont::StyleStrategy QFontInfo::styleHint()
|
|
1237 |
*/
|
|
1238 |
QFont::StyleHint QFont::styleHint() const
|
|
1239 |
{
|
|
1240 |
return (StyleHint) d->request.styleHint;
|
|
1241 |
}
|
|
1242 |
|
|
1243 |
/*!
|
|
1244 |
\enum QFont::StyleHint
|
|
1245 |
|
|
1246 |
Style hints are used by the \l{QFont}{font matching} algorithm to
|
|
1247 |
find an appropriate default family if a selected font family is
|
|
1248 |
not available.
|
|
1249 |
|
|
1250 |
\value AnyStyle leaves the font matching algorithm to choose the
|
|
1251 |
family. This is the default.
|
|
1252 |
|
|
1253 |
\value SansSerif the font matcher prefer sans serif fonts.
|
|
1254 |
\value Helvetica is a synonym for \c SansSerif.
|
|
1255 |
|
|
1256 |
\value Serif the font matcher prefers serif fonts.
|
|
1257 |
\value Times is a synonym for \c Serif.
|
|
1258 |
|
|
1259 |
\value TypeWriter the font matcher prefers fixed pitch fonts.
|
|
1260 |
\value Courier a synonym for \c TypeWriter.
|
|
1261 |
|
|
1262 |
\value OldEnglish the font matcher prefers decorative fonts.
|
|
1263 |
\value Decorative is a synonym for \c OldEnglish.
|
|
1264 |
|
|
1265 |
\value System the font matcher prefers system fonts.
|
|
1266 |
*/
|
|
1267 |
|
|
1268 |
/*!
|
|
1269 |
\enum QFont::StyleStrategy
|
|
1270 |
|
|
1271 |
The style strategy tells the \l{QFont}{font matching} algorithm
|
|
1272 |
what type of fonts should be used to find an appropriate default
|
|
1273 |
family.
|
|
1274 |
|
|
1275 |
The following strategies are available:
|
|
1276 |
|
|
1277 |
\value PreferDefault the default style strategy. It does not prefer
|
|
1278 |
any type of font.
|
|
1279 |
\value PreferBitmap prefers bitmap fonts (as opposed to outline
|
|
1280 |
fonts).
|
|
1281 |
\value PreferDevice prefers device fonts.
|
|
1282 |
\value PreferOutline prefers outline fonts (as opposed to bitmap fonts).
|
|
1283 |
\value ForceOutline forces the use of outline fonts.
|
|
1284 |
\value NoAntialias don't antialias the fonts.
|
|
1285 |
\value PreferAntialias antialias if possible.
|
|
1286 |
\value OpenGLCompatible forces the use of OpenGL compatible
|
|
1287 |
fonts.
|
|
1288 |
\value NoFontMerging If a font does not contain a character requested
|
|
1289 |
to draw then Qt automatically chooses a similar looking for that contains
|
|
1290 |
the character. This flag disables this feature.
|
|
1291 |
|
|
1292 |
Any of these may be OR-ed with one of these flags:
|
|
1293 |
|
|
1294 |
\value PreferMatch prefer an exact match. The font matcher will try to
|
|
1295 |
use the exact font size that has been specified.
|
|
1296 |
\value PreferQuality prefer the best quality font. The font matcher
|
|
1297 |
will use the nearest standard point size that the font
|
|
1298 |
supports.
|
|
1299 |
*/
|
|
1300 |
|
|
1301 |
/*!
|
|
1302 |
Sets the style hint and strategy to \a hint and \a strategy,
|
|
1303 |
respectively.
|
|
1304 |
|
|
1305 |
If these aren't set explicitly the style hint will default to
|
|
1306 |
\c AnyStyle and the style strategy to \c PreferDefault.
|
|
1307 |
|
|
1308 |
Qt does not support style hints on X11 since this information
|
|
1309 |
is not provided by the window system.
|
|
1310 |
|
|
1311 |
\sa StyleHint, styleHint(), StyleStrategy, styleStrategy(), QFontInfo
|
|
1312 |
*/
|
|
1313 |
void QFont::setStyleHint(StyleHint hint, StyleStrategy strategy)
|
|
1314 |
{
|
|
1315 |
detach();
|
|
1316 |
|
|
1317 |
if ((resolve_mask & (QFont::StyleHintResolved | QFont::StyleStrategyResolved)) &&
|
|
1318 |
(StyleHint) d->request.styleHint == hint &&
|
|
1319 |
(StyleStrategy) d->request.styleStrategy == strategy)
|
|
1320 |
return;
|
|
1321 |
|
|
1322 |
d->request.styleHint = hint;
|
|
1323 |
d->request.styleStrategy = strategy;
|
|
1324 |
resolve_mask |= QFont::StyleHintResolved;
|
|
1325 |
resolve_mask |= QFont::StyleStrategyResolved;
|
|
1326 |
|
|
1327 |
#if defined(Q_WS_X11)
|
|
1328 |
d->request.addStyle.clear();
|
|
1329 |
#endif // Q_WS_X11
|
|
1330 |
}
|
|
1331 |
|
|
1332 |
/*!
|
|
1333 |
Sets the style strategy for the font to \a s.
|
|
1334 |
|
|
1335 |
\sa QFont::StyleStrategy
|
|
1336 |
*/
|
|
1337 |
void QFont::setStyleStrategy(StyleStrategy s)
|
|
1338 |
{
|
|
1339 |
detach();
|
|
1340 |
|
|
1341 |
if ((resolve_mask & QFont::StyleStrategyResolved) &&
|
|
1342 |
s == (StyleStrategy)d->request.styleStrategy)
|
|
1343 |
return;
|
|
1344 |
|
|
1345 |
d->request.styleStrategy = s;
|
|
1346 |
resolve_mask |= QFont::StyleStrategyResolved;
|
|
1347 |
}
|
|
1348 |
|
|
1349 |
|
|
1350 |
/*!
|
|
1351 |
\enum QFont::Stretch
|
|
1352 |
|
|
1353 |
Predefined stretch values that follow the CSS naming convention. The higher
|
|
1354 |
the value, the more stretched the text is.
|
|
1355 |
|
|
1356 |
\value UltraCondensed 50
|
|
1357 |
\value ExtraCondensed 62
|
|
1358 |
\value Condensed 75
|
|
1359 |
\value SemiCondensed 87
|
|
1360 |
\value Unstretched 100
|
|
1361 |
\value SemiExpanded 112
|
|
1362 |
\value Expanded 125
|
|
1363 |
\value ExtraExpanded 150
|
|
1364 |
\value UltraExpanded 200
|
|
1365 |
|
|
1366 |
\sa setStretch() stretch()
|
|
1367 |
*/
|
|
1368 |
|
|
1369 |
/*!
|
|
1370 |
Returns the stretch factor for the font.
|
|
1371 |
|
|
1372 |
\sa setStretch()
|
|
1373 |
*/
|
|
1374 |
int QFont::stretch() const
|
|
1375 |
{
|
|
1376 |
return d->request.stretch;
|
|
1377 |
}
|
|
1378 |
|
|
1379 |
/*!
|
|
1380 |
Sets the stretch factor for the font.
|
|
1381 |
|
|
1382 |
The stretch factor changes the width of all characters in the font
|
|
1383 |
by \a factor percent. For example, setting \a factor to 150
|
|
1384 |
results in all characters in the font being 1.5 times (ie. 150%)
|
|
1385 |
wider. The default stretch factor is 100. The minimum stretch
|
|
1386 |
factor is 1, and the maximum stretch factor is 4000.
|
|
1387 |
|
|
1388 |
The stretch factor is only applied to outline fonts. The stretch
|
|
1389 |
factor is ignored for bitmap fonts.
|
|
1390 |
|
|
1391 |
NOTE: QFont cannot stretch XLFD fonts. When loading XLFD fonts on
|
|
1392 |
X11, the stretch factor is matched against a predefined set of
|
|
1393 |
values for the SETWIDTH_NAME field of the XLFD.
|
|
1394 |
|
|
1395 |
\sa stretch() QFont::Stretch
|
|
1396 |
*/
|
|
1397 |
void QFont::setStretch(int factor)
|
|
1398 |
{
|
|
1399 |
if (factor < 1 || factor > 4000) {
|
|
1400 |
qWarning("QFont::setStretch: Parameter '%d' out of range", factor);
|
|
1401 |
return;
|
|
1402 |
}
|
|
1403 |
|
|
1404 |
if ((resolve_mask & QFont::StretchResolved) &&
|
|
1405 |
d->request.stretch == (uint)factor)
|
|
1406 |
return;
|
|
1407 |
|
|
1408 |
detach();
|
|
1409 |
|
|
1410 |
d->request.stretch = (uint)factor;
|
|
1411 |
resolve_mask |= QFont::StretchResolved;
|
|
1412 |
}
|
|
1413 |
|
|
1414 |
/*!
|
|
1415 |
\enum QFont::SpacingType
|
|
1416 |
\since 4.4
|
|
1417 |
|
|
1418 |
\value PercentageSpacing A value of 100 will keep the spacing unchanged; a value of 200 will enlarge the
|
|
1419 |
spacing after a character by the width of the character itself.
|
|
1420 |
\value AbsoluteSpacing A positive value increases the letter spacing by the corresponding pixels; a negative
|
|
1421 |
value decreases the spacing.
|
|
1422 |
*/
|
|
1423 |
|
|
1424 |
/*!
|
|
1425 |
\since 4.4
|
|
1426 |
Returns the letter spacing for the font.
|
|
1427 |
|
|
1428 |
\sa setLetterSpacing(), letterSpacingType(), setWordSpacing()
|
|
1429 |
*/
|
|
1430 |
qreal QFont::letterSpacing() const
|
|
1431 |
{
|
|
1432 |
return d->letterSpacing.toReal();
|
|
1433 |
}
|
|
1434 |
|
|
1435 |
/*!
|
|
1436 |
\since 4.4
|
|
1437 |
Sets the letter spacing for the font to \a spacing and the type
|
|
1438 |
of spacing to \a type.
|
|
1439 |
|
|
1440 |
Letter spacing changes the default spacing between individual
|
|
1441 |
letters in the font. The spacing between the letters can be
|
|
1442 |
made smaller as well as larger.
|
|
1443 |
|
|
1444 |
\sa letterSpacing(), letterSpacingType(), setWordSpacing()
|
|
1445 |
*/
|
|
1446 |
void QFont::setLetterSpacing(SpacingType type, qreal spacing)
|
|
1447 |
{
|
|
1448 |
const QFixed newSpacing = QFixed::fromReal(spacing);
|
|
1449 |
const bool absoluteSpacing = type == AbsoluteSpacing;
|
|
1450 |
if ((resolve_mask & QFont::LetterSpacingResolved) &&
|
|
1451 |
d->letterSpacingIsAbsolute == absoluteSpacing &&
|
|
1452 |
d->letterSpacing == newSpacing)
|
|
1453 |
return;
|
|
1454 |
|
|
1455 |
detach();
|
|
1456 |
|
|
1457 |
d->letterSpacing = newSpacing;
|
|
1458 |
d->letterSpacingIsAbsolute = absoluteSpacing;
|
|
1459 |
resolve_mask |= QFont::LetterSpacingResolved;
|
|
1460 |
}
|
|
1461 |
|
|
1462 |
/*!
|
|
1463 |
\since 4.4
|
|
1464 |
Returns the spacing type used for letter spacing.
|
|
1465 |
|
|
1466 |
\sa letterSpacing(), setLetterSpacing(), setWordSpacing()
|
|
1467 |
*/
|
|
1468 |
QFont::SpacingType QFont::letterSpacingType() const
|
|
1469 |
{
|
|
1470 |
return d->letterSpacingIsAbsolute ? AbsoluteSpacing : PercentageSpacing;
|
|
1471 |
}
|
|
1472 |
|
|
1473 |
/*!
|
|
1474 |
\since 4.4
|
|
1475 |
Returns the word spacing for the font.
|
|
1476 |
|
|
1477 |
\sa setWordSpacing(), setLetterSpacing()
|
|
1478 |
*/
|
|
1479 |
qreal QFont::wordSpacing() const
|
|
1480 |
{
|
|
1481 |
return d->wordSpacing.toReal();
|
|
1482 |
}
|
|
1483 |
|
|
1484 |
/*!
|
|
1485 |
\since 4.4
|
|
1486 |
Sets the word spacing for the font to \a spacing.
|
|
1487 |
|
|
1488 |
Word spacing changes the default spacing between individual
|
|
1489 |
words. A positive value increases the word spacing
|
|
1490 |
by a corresponding amount of pixels, while a negative value
|
|
1491 |
decreases the inter-word spacing accordingly.
|
|
1492 |
|
|
1493 |
Word spacing will not apply to writing systems, where indiviaul
|
|
1494 |
words are not separated by white space.
|
|
1495 |
|
|
1496 |
\sa wordSpacing(), setLetterSpacing()
|
|
1497 |
*/
|
|
1498 |
void QFont::setWordSpacing(qreal spacing)
|
|
1499 |
{
|
|
1500 |
const QFixed newSpacing = QFixed::fromReal(spacing);
|
|
1501 |
if ((resolve_mask & QFont::WordSpacingResolved) &&
|
|
1502 |
d->wordSpacing == newSpacing)
|
|
1503 |
return;
|
|
1504 |
|
|
1505 |
detach();
|
|
1506 |
|
|
1507 |
d->wordSpacing = newSpacing;
|
|
1508 |
resolve_mask |= QFont::WordSpacingResolved;
|
|
1509 |
}
|
|
1510 |
|
|
1511 |
/*!
|
|
1512 |
\enum QFont::Capitalization
|
|
1513 |
\since 4.4
|
|
1514 |
|
|
1515 |
Rendering option for text this font applies to.
|
|
1516 |
|
|
1517 |
|
|
1518 |
\value MixedCase This is the normal text rendering option where no capitalization change is applied.
|
|
1519 |
\value AllUppercase This alters the text to be rendered in all uppercase type.
|
|
1520 |
\value AllLowercase This alters the text to be rendered in all lowercase type.
|
|
1521 |
\value SmallCaps This alters the text to be rendered in small-caps type.
|
|
1522 |
\value Capitalize This alters the text to be rendered with the first character of each word as an uppercase character.
|
|
1523 |
*/
|
|
1524 |
|
|
1525 |
/*!
|
|
1526 |
\since 4.4
|
|
1527 |
Sets the capitalization of the text in this font to \a caps.
|
|
1528 |
|
|
1529 |
A font's capitalization makes the text appear in the selected capitalization mode.
|
|
1530 |
|
|
1531 |
\sa capitalization()
|
|
1532 |
*/
|
|
1533 |
void QFont::setCapitalization(Capitalization caps)
|
|
1534 |
{
|
|
1535 |
if ((resolve_mask & QFont::CapitalizationResolved) &&
|
|
1536 |
capitalization() == caps)
|
|
1537 |
return;
|
|
1538 |
|
|
1539 |
detach();
|
|
1540 |
|
|
1541 |
d->capital = caps;
|
|
1542 |
resolve_mask |= QFont::CapitalizationResolved;
|
|
1543 |
}
|
|
1544 |
|
|
1545 |
/*!
|
|
1546 |
\since 4.4
|
|
1547 |
Returns the current capitalization type of the font.
|
|
1548 |
|
|
1549 |
\sa setCapitalization()
|
|
1550 |
*/
|
|
1551 |
QFont::Capitalization QFont::capitalization() const
|
|
1552 |
{
|
|
1553 |
return static_cast<QFont::Capitalization> (d->capital);
|
|
1554 |
}
|
|
1555 |
|
|
1556 |
|
|
1557 |
/*!
|
|
1558 |
If \a enable is true, turns raw mode on; otherwise turns raw mode
|
|
1559 |
off. This function only has an effect under X11.
|
|
1560 |
|
|
1561 |
If raw mode is enabled, Qt will search for an X font with a
|
|
1562 |
complete font name matching the family name, ignoring all other
|
|
1563 |
values set for the QFont. If the font name matches several fonts,
|
|
1564 |
Qt will use the first font returned by X. QFontInfo \e cannot be
|
|
1565 |
used to fetch information about a QFont using raw mode (it will
|
|
1566 |
return the values set in the QFont for all parameters, including
|
|
1567 |
the family name).
|
|
1568 |
|
|
1569 |
\warning Do not use raw mode unless you really, really need it! In
|
|
1570 |
most (if not all) cases, setRawName() is a much better choice.
|
|
1571 |
|
|
1572 |
\sa rawMode(), setRawName()
|
|
1573 |
*/
|
|
1574 |
void QFont::setRawMode(bool enable)
|
|
1575 |
{
|
|
1576 |
detach();
|
|
1577 |
|
|
1578 |
if ((bool) d->rawMode == enable) return;
|
|
1579 |
|
|
1580 |
d->rawMode = enable;
|
|
1581 |
}
|
|
1582 |
|
|
1583 |
/*!
|
|
1584 |
Returns true if a window system font exactly matching the settings
|
|
1585 |
of this font is available.
|
|
1586 |
|
|
1587 |
\sa QFontInfo
|
|
1588 |
*/
|
|
1589 |
bool QFont::exactMatch() const
|
|
1590 |
{
|
|
1591 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
1592 |
Q_ASSERT(engine != 0);
|
|
1593 |
return (d->rawMode
|
|
1594 |
? engine->type() != QFontEngine::Box
|
|
1595 |
: d->request.exactMatch(engine->fontDef));
|
|
1596 |
}
|
|
1597 |
|
|
1598 |
/*!
|
|
1599 |
Returns true if this font is equal to \a f; otherwise returns
|
|
1600 |
false.
|
|
1601 |
|
|
1602 |
Two QFonts are considered equal if their font attributes are
|
|
1603 |
equal. If rawMode() is enabled for both fonts, only the family
|
|
1604 |
fields are compared.
|
|
1605 |
|
|
1606 |
\sa operator!=() isCopyOf()
|
|
1607 |
*/
|
|
1608 |
bool QFont::operator==(const QFont &f) const
|
|
1609 |
{
|
|
1610 |
return (f.d == d
|
|
1611 |
|| (f.d->request == d->request
|
|
1612 |
&& f.d->request.pointSize == d->request.pointSize
|
|
1613 |
&& f.d->underline == d->underline
|
|
1614 |
&& f.d->overline == d->overline
|
|
1615 |
&& f.d->strikeOut == d->strikeOut
|
|
1616 |
&& f.d->kerning == d->kerning));
|
|
1617 |
}
|
|
1618 |
|
|
1619 |
|
|
1620 |
/*!
|
|
1621 |
Provides an arbitrary comparison of this font and font \a f.
|
|
1622 |
All that is guaranteed is that the operator returns false if both
|
|
1623 |
fonts are equal and that (f1 \< f2) == !(f2 \< f1) if the fonts
|
|
1624 |
are not equal.
|
|
1625 |
|
|
1626 |
This function is useful in some circumstances, for example if you
|
|
1627 |
want to use QFont objects as keys in a QMap.
|
|
1628 |
|
|
1629 |
\sa operator==() operator!=() isCopyOf()
|
|
1630 |
*/
|
|
1631 |
bool QFont::operator<(const QFont &f) const
|
|
1632 |
{
|
|
1633 |
if (f.d == d) return false;
|
|
1634 |
// the < operator for fontdefs ignores point sizes.
|
|
1635 |
QFontDef &r1 = f.d->request;
|
|
1636 |
QFontDef &r2 = d->request;
|
|
1637 |
if (r1.pointSize != r2.pointSize) return r1.pointSize < r2.pointSize;
|
|
1638 |
if (r1.pixelSize != r2.pixelSize) return r1.pixelSize < r2.pixelSize;
|
|
1639 |
if (r1.weight != r2.weight) return r1.weight < r2.weight;
|
|
1640 |
if (r1.style != r2.style) return r1.style < r2.style;
|
|
1641 |
if (r1.stretch != r2.stretch) return r1.stretch < r2.stretch;
|
|
1642 |
if (r1.styleHint != r2.styleHint) return r1.styleHint < r2.styleHint;
|
|
1643 |
if (r1.styleStrategy != r2.styleStrategy) return r1.styleStrategy < r2.styleStrategy;
|
|
1644 |
if (r1.family != r2.family) return r1.family < r2.family;
|
|
1645 |
#ifdef Q_WS_X11
|
|
1646 |
if (r1.addStyle != r2.addStyle) return r1.addStyle < r2.addStyle;
|
|
1647 |
#endif // Q_WS_X11
|
|
1648 |
|
|
1649 |
int f1attrs = (f.d->underline << 3) + (f.d->overline << 2) + (f.d->strikeOut<<1) + f.d->kerning;
|
|
1650 |
int f2attrs = (d->underline << 3) + (d->overline << 2) + (d->strikeOut<<1) + d->kerning;
|
|
1651 |
return f1attrs < f2attrs;
|
|
1652 |
}
|
|
1653 |
|
|
1654 |
|
|
1655 |
/*!
|
|
1656 |
Returns true if this font is different from \a f; otherwise
|
|
1657 |
returns false.
|
|
1658 |
|
|
1659 |
Two QFonts are considered to be different if their font attributes
|
|
1660 |
are different. If rawMode() is enabled for both fonts, only the
|
|
1661 |
family fields are compared.
|
|
1662 |
|
|
1663 |
\sa operator==()
|
|
1664 |
*/
|
|
1665 |
bool QFont::operator!=(const QFont &f) const
|
|
1666 |
{
|
|
1667 |
return !(operator==(f));
|
|
1668 |
}
|
|
1669 |
|
|
1670 |
/*!
|
|
1671 |
Returns the font as a QVariant
|
|
1672 |
*/
|
|
1673 |
QFont::operator QVariant() const
|
|
1674 |
{
|
|
1675 |
return QVariant(QVariant::Font, this);
|
|
1676 |
}
|
|
1677 |
|
|
1678 |
/*!
|
|
1679 |
Returns true if this font and \a f are copies of each other, i.e.
|
|
1680 |
one of them was created as a copy of the other and neither has
|
|
1681 |
been modified since. This is much stricter than equality.
|
|
1682 |
|
|
1683 |
\sa operator=() operator==()
|
|
1684 |
*/
|
|
1685 |
bool QFont::isCopyOf(const QFont & f) const
|
|
1686 |
{
|
|
1687 |
return d == f.d;
|
|
1688 |
}
|
|
1689 |
|
|
1690 |
/*!
|
|
1691 |
Returns true if raw mode is used for font name matching; otherwise
|
|
1692 |
returns false.
|
|
1693 |
|
|
1694 |
\sa setRawMode() rawName()
|
|
1695 |
*/
|
|
1696 |
bool QFont::rawMode() const
|
|
1697 |
{
|
|
1698 |
return d->rawMode;
|
|
1699 |
}
|
|
1700 |
|
|
1701 |
/*!
|
|
1702 |
Returns a new QFont that has attributes copied from \a other that
|
|
1703 |
have not been previously set on this font.
|
|
1704 |
*/
|
|
1705 |
QFont QFont::resolve(const QFont &other) const
|
|
1706 |
{
|
|
1707 |
if (*this == other
|
|
1708 |
&& (resolve_mask == other.resolve_mask || resolve_mask == 0)
|
|
1709 |
&& d->dpi == other.d->dpi) {
|
|
1710 |
QFont o = other;
|
|
1711 |
o.resolve_mask = resolve_mask;
|
|
1712 |
return o;
|
|
1713 |
}
|
|
1714 |
|
|
1715 |
QFont font(*this);
|
|
1716 |
font.detach();
|
|
1717 |
font.d->resolve(resolve_mask, other.d.data());
|
|
1718 |
|
|
1719 |
return font;
|
|
1720 |
}
|
|
1721 |
|
|
1722 |
/*!
|
|
1723 |
\fn uint QFont::resolve() const
|
|
1724 |
\internal
|
|
1725 |
*/
|
|
1726 |
|
|
1727 |
/*!
|
|
1728 |
\fn void QFont::resolve(uint mask)
|
|
1729 |
\internal
|
|
1730 |
*/
|
|
1731 |
|
|
1732 |
#ifdef QT3_SUPPORT
|
|
1733 |
|
|
1734 |
/*! \obsolete
|
|
1735 |
|
|
1736 |
Please use QApplication::font() instead.
|
|
1737 |
*/
|
|
1738 |
QFont QFont::defaultFont()
|
|
1739 |
{
|
|
1740 |
return QApplication::font();
|
|
1741 |
}
|
|
1742 |
|
|
1743 |
/*! \obsolete
|
|
1744 |
|
|
1745 |
Please use QApplication::setFont() instead.
|
|
1746 |
*/
|
|
1747 |
void QFont::setDefaultFont(const QFont &f)
|
|
1748 |
{
|
|
1749 |
QApplication::setFont(f);
|
|
1750 |
}
|
|
1751 |
|
|
1752 |
/*!
|
|
1753 |
\fn qreal QFont::pointSizeFloat() const
|
|
1754 |
\compat
|
|
1755 |
|
|
1756 |
Use pointSizeF() instead.
|
|
1757 |
*/
|
|
1758 |
|
|
1759 |
/*!
|
|
1760 |
\fn void QFont::setPointSizeFloat(qreal size)
|
|
1761 |
\compat
|
|
1762 |
|
|
1763 |
Use setPointSizeF() instead.
|
|
1764 |
*/
|
|
1765 |
#endif
|
|
1766 |
|
|
1767 |
|
|
1768 |
|
|
1769 |
|
|
1770 |
/*****************************************************************************
|
|
1771 |
QFont substitution management
|
|
1772 |
*****************************************************************************/
|
|
1773 |
|
|
1774 |
typedef QHash<QString, QStringList> QFontSubst;
|
|
1775 |
Q_GLOBAL_STATIC(QFontSubst, globalFontSubst)
|
|
1776 |
|
|
1777 |
// create substitution dict
|
|
1778 |
static void initFontSubst()
|
|
1779 |
{
|
|
1780 |
// default substitutions
|
|
1781 |
static const char *initTbl[] = {
|
|
1782 |
|
|
1783 |
#if defined(Q_WS_X11)
|
|
1784 |
"arial", "helvetica",
|
|
1785 |
"times new roman", "times",
|
|
1786 |
"courier new", "courier",
|
|
1787 |
"sans serif", "helvetica",
|
|
1788 |
#elif defined(Q_WS_WIN)
|
|
1789 |
"times", "times new roman",
|
|
1790 |
"courier", "courier new",
|
|
1791 |
"helvetica", "arial",
|
|
1792 |
"sans serif", "arial",
|
|
1793 |
#endif
|
|
1794 |
|
|
1795 |
0, 0
|
|
1796 |
};
|
|
1797 |
|
|
1798 |
QFontSubst *fontSubst = globalFontSubst();
|
|
1799 |
Q_ASSERT(fontSubst != 0);
|
|
1800 |
if (!fontSubst->isEmpty())
|
|
1801 |
return;
|
|
1802 |
#if defined(Q_WS_X11) && !defined(QT_NO_FONTCONFIG)
|
|
1803 |
if (X11->has_fontconfig)
|
|
1804 |
return;
|
|
1805 |
#endif
|
|
1806 |
|
|
1807 |
for (int i=0; initTbl[i] != 0; i += 2) {
|
|
1808 |
QStringList &list = (*fontSubst)[QString::fromLatin1(initTbl[i])];
|
|
1809 |
list.append(QString::fromLatin1(initTbl[i+1]));
|
|
1810 |
}
|
|
1811 |
}
|
|
1812 |
|
|
1813 |
|
|
1814 |
/*!
|
|
1815 |
Returns the first family name to be used whenever \a familyName is
|
|
1816 |
specified. The lookup is case insensitive.
|
|
1817 |
|
|
1818 |
If there is no substitution for \a familyName, \a familyName is
|
|
1819 |
returned.
|
|
1820 |
|
|
1821 |
To obtain a list of substitutions use substitutes().
|
|
1822 |
|
|
1823 |
\sa setFamily() insertSubstitutions() insertSubstitution() removeSubstitution()
|
|
1824 |
*/
|
|
1825 |
QString QFont::substitute(const QString &familyName)
|
|
1826 |
{
|
|
1827 |
initFontSubst();
|
|
1828 |
|
|
1829 |
QFontSubst *fontSubst = globalFontSubst();
|
|
1830 |
Q_ASSERT(fontSubst != 0);
|
|
1831 |
QFontSubst::ConstIterator it = fontSubst->constFind(familyName.toLower());
|
|
1832 |
if (it != fontSubst->constEnd() && !(*it).isEmpty())
|
|
1833 |
return (*it).first();
|
|
1834 |
|
|
1835 |
return familyName;
|
|
1836 |
}
|
|
1837 |
|
|
1838 |
|
|
1839 |
/*!
|
|
1840 |
Returns a list of family names to be used whenever \a familyName
|
|
1841 |
is specified. The lookup is case insensitive.
|
|
1842 |
|
|
1843 |
If there is no substitution for \a familyName, an empty list is
|
|
1844 |
returned.
|
|
1845 |
|
|
1846 |
\sa substitute() insertSubstitutions() insertSubstitution() removeSubstitution()
|
|
1847 |
*/
|
|
1848 |
QStringList QFont::substitutes(const QString &familyName)
|
|
1849 |
{
|
|
1850 |
initFontSubst();
|
|
1851 |
|
|
1852 |
QFontSubst *fontSubst = globalFontSubst();
|
|
1853 |
Q_ASSERT(fontSubst != 0);
|
|
1854 |
return fontSubst->value(familyName.toLower(), QStringList());
|
|
1855 |
}
|
|
1856 |
|
|
1857 |
|
|
1858 |
/*!
|
|
1859 |
Inserts \a substituteName into the substitution
|
|
1860 |
table for the family \a familyName.
|
|
1861 |
|
|
1862 |
\sa insertSubstitutions() removeSubstitution() substitutions() substitute() substitutes()
|
|
1863 |
*/
|
|
1864 |
void QFont::insertSubstitution(const QString &familyName,
|
|
1865 |
const QString &substituteName)
|
|
1866 |
{
|
|
1867 |
initFontSubst();
|
|
1868 |
|
|
1869 |
QFontSubst *fontSubst = globalFontSubst();
|
|
1870 |
Q_ASSERT(fontSubst != 0);
|
|
1871 |
QStringList &list = (*fontSubst)[familyName.toLower()];
|
|
1872 |
QString s = substituteName.toLower();
|
|
1873 |
if (!list.contains(s))
|
|
1874 |
list.append(s);
|
|
1875 |
}
|
|
1876 |
|
|
1877 |
|
|
1878 |
/*!
|
|
1879 |
Inserts the list of families \a substituteNames into the
|
|
1880 |
substitution list for \a familyName.
|
|
1881 |
|
|
1882 |
\sa insertSubstitution(), removeSubstitution(), substitutions(), substitute()
|
|
1883 |
*/
|
|
1884 |
void QFont::insertSubstitutions(const QString &familyName,
|
|
1885 |
const QStringList &substituteNames)
|
|
1886 |
{
|
|
1887 |
initFontSubst();
|
|
1888 |
|
|
1889 |
QFontSubst *fontSubst = globalFontSubst();
|
|
1890 |
Q_ASSERT(fontSubst != 0);
|
|
1891 |
QStringList &list = (*fontSubst)[familyName.toLower()];
|
|
1892 |
QStringList::ConstIterator it = substituteNames.constBegin();
|
|
1893 |
while (it != substituteNames.constEnd()) {
|
|
1894 |
QString s = (*it).toLower();
|
|
1895 |
if (!list.contains(s))
|
|
1896 |
list.append(s);
|
|
1897 |
it++;
|
|
1898 |
}
|
|
1899 |
}
|
|
1900 |
|
|
1901 |
/*! \fn void QFont::initialize()
|
|
1902 |
\internal
|
|
1903 |
|
|
1904 |
Internal function that initializes the font system. The font cache
|
|
1905 |
and font dict do not alloc the keys. The key is a QString which is
|
|
1906 |
shared between QFontPrivate and QXFontName.
|
|
1907 |
*/
|
|
1908 |
|
|
1909 |
/*! \fn void QFont::cleanup()
|
|
1910 |
\internal
|
|
1911 |
|
|
1912 |
Internal function that cleans up the font system.
|
|
1913 |
*/
|
|
1914 |
|
|
1915 |
// ### mark: should be called removeSubstitutions()
|
|
1916 |
/*!
|
|
1917 |
Removes all the substitutions for \a familyName.
|
|
1918 |
|
|
1919 |
\sa insertSubstitutions(), insertSubstitution(), substitutions(), substitute()
|
|
1920 |
*/
|
|
1921 |
void QFont::removeSubstitution(const QString &familyName)
|
|
1922 |
{ // ### function name should be removeSubstitutions() or
|
|
1923 |
// ### removeSubstitutionList()
|
|
1924 |
initFontSubst();
|
|
1925 |
|
|
1926 |
QFontSubst *fontSubst = globalFontSubst();
|
|
1927 |
Q_ASSERT(fontSubst != 0);
|
|
1928 |
fontSubst->remove(familyName.toLower());
|
|
1929 |
}
|
|
1930 |
|
|
1931 |
|
|
1932 |
/*!
|
|
1933 |
Returns a sorted list of substituted family names.
|
|
1934 |
|
|
1935 |
\sa insertSubstitution(), removeSubstitution(), substitute()
|
|
1936 |
*/
|
|
1937 |
QStringList QFont::substitutions()
|
|
1938 |
{
|
|
1939 |
initFontSubst();
|
|
1940 |
|
|
1941 |
QFontSubst *fontSubst = globalFontSubst();
|
|
1942 |
Q_ASSERT(fontSubst != 0);
|
|
1943 |
QStringList ret;
|
|
1944 |
QFontSubst::ConstIterator it = fontSubst->constBegin();
|
|
1945 |
|
|
1946 |
while (it != fontSubst->constEnd()) {
|
|
1947 |
ret.append(it.key());
|
|
1948 |
++it;
|
|
1949 |
}
|
|
1950 |
|
|
1951 |
ret.sort();
|
|
1952 |
return ret;
|
|
1953 |
}
|
|
1954 |
|
|
1955 |
|
|
1956 |
/* \internal
|
|
1957 |
Internal function. Converts boolean font settings to an unsigned
|
|
1958 |
8-bit number. Used for serialization etc.
|
|
1959 |
*/
|
|
1960 |
static quint8 get_font_bits(int version, const QFontPrivate *f)
|
|
1961 |
{
|
|
1962 |
Q_ASSERT(f != 0);
|
|
1963 |
quint8 bits = 0;
|
|
1964 |
if (f->request.style)
|
|
1965 |
bits |= 0x01;
|
|
1966 |
if (f->underline)
|
|
1967 |
bits |= 0x02;
|
|
1968 |
if (f->overline)
|
|
1969 |
bits |= 0x40;
|
|
1970 |
if (f->strikeOut)
|
|
1971 |
bits |= 0x04;
|
|
1972 |
if (f->request.fixedPitch)
|
|
1973 |
bits |= 0x08;
|
|
1974 |
// if (f.hintSetByUser)
|
|
1975 |
// bits |= 0x10;
|
|
1976 |
if (f->rawMode)
|
|
1977 |
bits |= 0x20;
|
|
1978 |
if (version >= QDataStream::Qt_4_0) {
|
|
1979 |
if (f->kerning)
|
|
1980 |
bits |= 0x10;
|
|
1981 |
}
|
|
1982 |
if (f->request.style == QFont::StyleOblique)
|
|
1983 |
bits |= 0x80;
|
|
1984 |
return bits;
|
|
1985 |
}
|
|
1986 |
|
|
1987 |
static quint8 get_extended_font_bits(const QFontPrivate *f)
|
|
1988 |
{
|
|
1989 |
Q_ASSERT(f != 0);
|
|
1990 |
quint8 bits = 0;
|
|
1991 |
if (f->request.ignorePitch)
|
|
1992 |
bits |= 0x01;
|
|
1993 |
if (f->letterSpacingIsAbsolute)
|
|
1994 |
bits |= 0x02;
|
|
1995 |
return bits;
|
|
1996 |
}
|
|
1997 |
|
|
1998 |
#ifndef QT_NO_DATASTREAM
|
|
1999 |
|
|
2000 |
/* \internal
|
|
2001 |
Internal function. Sets boolean font settings from an unsigned
|
|
2002 |
8-bit number. Used for serialization etc.
|
|
2003 |
*/
|
|
2004 |
static void set_font_bits(int version, quint8 bits, QFontPrivate *f)
|
|
2005 |
{
|
|
2006 |
Q_ASSERT(f != 0);
|
|
2007 |
f->request.style = (bits & 0x01) != 0 ? QFont::StyleItalic : QFont::StyleNormal;
|
|
2008 |
f->underline = (bits & 0x02) != 0;
|
|
2009 |
f->overline = (bits & 0x40) != 0;
|
|
2010 |
f->strikeOut = (bits & 0x04) != 0;
|
|
2011 |
f->request.fixedPitch = (bits & 0x08) != 0;
|
|
2012 |
// f->hintSetByUser = (bits & 0x10) != 0;
|
|
2013 |
f->rawMode = (bits & 0x20) != 0;
|
|
2014 |
if (version >= QDataStream::Qt_4_0)
|
|
2015 |
f->kerning = (bits & 0x10) != 0;
|
|
2016 |
if ((bits & 0x80) != 0)
|
|
2017 |
f->request.style = QFont::StyleOblique;
|
|
2018 |
}
|
|
2019 |
|
|
2020 |
static void set_extended_font_bits(quint8 bits, QFontPrivate *f)
|
|
2021 |
{
|
|
2022 |
Q_ASSERT(f != 0);
|
|
2023 |
f->request.ignorePitch = (bits & 0x01) != 0;
|
|
2024 |
f->letterSpacingIsAbsolute = (bits & 0x02) != 0;
|
|
2025 |
}
|
|
2026 |
#endif
|
|
2027 |
|
|
2028 |
|
|
2029 |
/*!
|
|
2030 |
Returns the font's key, a textual representation of a font. It is
|
|
2031 |
typically used as the key for a cache or dictionary of fonts.
|
|
2032 |
|
|
2033 |
\sa QMap
|
|
2034 |
*/
|
|
2035 |
QString QFont::key() const
|
|
2036 |
{
|
|
2037 |
return toString();
|
|
2038 |
}
|
|
2039 |
|
|
2040 |
/*!
|
|
2041 |
Returns a description of the font. The description is a
|
|
2042 |
comma-separated list of the attributes, perfectly suited for use
|
|
2043 |
in QSettings.
|
|
2044 |
|
|
2045 |
\sa fromString()
|
|
2046 |
*/
|
|
2047 |
QString QFont::toString() const
|
|
2048 |
{
|
|
2049 |
const QChar comma(QLatin1Char(','));
|
|
2050 |
return family() + comma +
|
|
2051 |
QString::number( pointSizeF()) + comma +
|
|
2052 |
QString::number( pixelSize()) + comma +
|
|
2053 |
QString::number((int) styleHint()) + comma +
|
|
2054 |
QString::number( weight()) + comma +
|
|
2055 |
QString::number((int) style()) + comma +
|
|
2056 |
QString::number((int) underline()) + comma +
|
|
2057 |
QString::number((int) strikeOut()) + comma +
|
|
2058 |
QString::number((int)fixedPitch()) + comma +
|
|
2059 |
QString::number((int) rawMode());
|
|
2060 |
}
|
|
2061 |
|
|
2062 |
|
|
2063 |
/*!
|
|
2064 |
Sets this font to match the description \a descrip. The description
|
|
2065 |
is a comma-separated list of the font attributes, as returned by
|
|
2066 |
toString().
|
|
2067 |
|
|
2068 |
\sa toString()
|
|
2069 |
*/
|
|
2070 |
bool QFont::fromString(const QString &descrip)
|
|
2071 |
{
|
|
2072 |
QStringList l(descrip.split(QLatin1Char(',')));
|
|
2073 |
|
|
2074 |
int count = l.count();
|
|
2075 |
if (!count || (count > 2 && count < 9) || count > 11) {
|
|
2076 |
qWarning("QFont::fromString: Invalid description '%s'",
|
|
2077 |
descrip.isEmpty() ? "(empty)" : descrip.toLatin1().data());
|
|
2078 |
return false;
|
|
2079 |
}
|
|
2080 |
|
|
2081 |
setFamily(l[0]);
|
|
2082 |
if (count > 1 && l[1].toDouble() > 0.0)
|
|
2083 |
setPointSizeF(l[1].toDouble());
|
|
2084 |
if (count == 9) {
|
|
2085 |
setStyleHint((StyleHint) l[2].toInt());
|
|
2086 |
setWeight(qMax(qMin(99, l[3].toInt()), 0));
|
|
2087 |
setItalic(l[4].toInt());
|
|
2088 |
setUnderline(l[5].toInt());
|
|
2089 |
setStrikeOut(l[6].toInt());
|
|
2090 |
setFixedPitch(l[7].toInt());
|
|
2091 |
setRawMode(l[8].toInt());
|
|
2092 |
} else if (count == 10) {
|
|
2093 |
if (l[2].toInt() > 0)
|
|
2094 |
setPixelSize(l[2].toInt());
|
|
2095 |
setStyleHint((StyleHint) l[3].toInt());
|
|
2096 |
setWeight(qMax(qMin(99, l[4].toInt()), 0));
|
|
2097 |
setStyle((QFont::Style)l[5].toInt());
|
|
2098 |
setUnderline(l[6].toInt());
|
|
2099 |
setStrikeOut(l[7].toInt());
|
|
2100 |
setFixedPitch(l[8].toInt());
|
|
2101 |
setRawMode(l[9].toInt());
|
|
2102 |
}
|
|
2103 |
if (count >= 9 && !d->request.fixedPitch) // assume 'false' fixedPitch equals default
|
|
2104 |
d->request.ignorePitch = true;
|
|
2105 |
|
|
2106 |
return true;
|
|
2107 |
}
|
|
2108 |
|
|
2109 |
#if !defined(Q_WS_QWS)
|
|
2110 |
/*! \internal
|
|
2111 |
|
|
2112 |
Internal function that dumps font cache statistics.
|
|
2113 |
*/
|
|
2114 |
void QFont::cacheStatistics()
|
|
2115 |
{
|
|
2116 |
|
|
2117 |
|
|
2118 |
}
|
|
2119 |
#endif // !Q_WS_QWS
|
|
2120 |
|
|
2121 |
|
|
2122 |
|
|
2123 |
/*****************************************************************************
|
|
2124 |
QFont stream functions
|
|
2125 |
*****************************************************************************/
|
|
2126 |
#ifndef QT_NO_DATASTREAM
|
|
2127 |
|
|
2128 |
/*!
|
|
2129 |
\relates QFont
|
|
2130 |
|
|
2131 |
Writes the font \a font to the data stream \a s. (toString()
|
|
2132 |
writes to a text stream.)
|
|
2133 |
|
|
2134 |
\sa \link datastreamformat.html Format of the QDataStream operators \endlink
|
|
2135 |
*/
|
|
2136 |
QDataStream &operator<<(QDataStream &s, const QFont &font)
|
|
2137 |
{
|
|
2138 |
if (s.version() == 1) {
|
|
2139 |
s << font.d->request.family.toLatin1();
|
|
2140 |
} else {
|
|
2141 |
s << font.d->request.family;
|
|
2142 |
}
|
|
2143 |
|
|
2144 |
if (s.version() >= QDataStream::Qt_4_0) {
|
|
2145 |
// 4.0
|
|
2146 |
double pointSize = font.d->request.pointSize;
|
|
2147 |
qint32 pixelSize = font.d->request.pixelSize;
|
|
2148 |
s << pointSize;
|
|
2149 |
s << pixelSize;
|
|
2150 |
} else if (s.version() <= 3) {
|
|
2151 |
qint16 pointSize = (qint16) (font.d->request.pointSize * 10);
|
|
2152 |
if (pointSize < 0) {
|
|
2153 |
#ifdef Q_WS_X11
|
|
2154 |
pointSize = (qint16)(font.d->request.pixelSize*720/QX11Info::appDpiY());
|
|
2155 |
#else
|
|
2156 |
pointSize = (qint16)QFontInfo(font).pointSize() * 10;
|
|
2157 |
#endif
|
|
2158 |
}
|
|
2159 |
s << pointSize;
|
|
2160 |
} else {
|
|
2161 |
s << (qint16) (font.d->request.pointSize * 10);
|
|
2162 |
s << (qint16) font.d->request.pixelSize;
|
|
2163 |
}
|
|
2164 |
|
|
2165 |
s << (quint8) font.d->request.styleHint;
|
|
2166 |
if (s.version() >= QDataStream::Qt_3_1)
|
|
2167 |
s << (quint8) font.d->request.styleStrategy;
|
|
2168 |
s << (quint8) 0
|
|
2169 |
<< (quint8) font.d->request.weight
|
|
2170 |
<< get_font_bits(s.version(), font.d.data());
|
|
2171 |
if (s.version() >= QDataStream::Qt_4_3)
|
|
2172 |
s << (quint16)font.d->request.stretch;
|
|
2173 |
if (s.version() >= QDataStream::Qt_4_4)
|
|
2174 |
s << get_extended_font_bits(font.d.data());
|
|
2175 |
if (s.version() >= QDataStream::Qt_4_5) {
|
|
2176 |
s << font.d->letterSpacing.value();
|
|
2177 |
s << font.d->wordSpacing.value();
|
|
2178 |
}
|
|
2179 |
return s;
|
|
2180 |
}
|
|
2181 |
|
|
2182 |
|
|
2183 |
/*!
|
|
2184 |
\relates QFont
|
|
2185 |
|
|
2186 |
Reads the font \a font from the data stream \a s. (fromString()
|
|
2187 |
reads from a text stream.)
|
|
2188 |
|
|
2189 |
\sa \link datastreamformat.html Format of the QDataStream operators \endlink
|
|
2190 |
*/
|
|
2191 |
QDataStream &operator>>(QDataStream &s, QFont &font)
|
|
2192 |
{
|
|
2193 |
font.d = new QFontPrivate;
|
|
2194 |
font.resolve_mask = QFont::AllPropertiesResolved;
|
|
2195 |
|
|
2196 |
quint8 styleHint, styleStrategy = QFont::PreferDefault, charSet, weight, bits;
|
|
2197 |
|
|
2198 |
if (s.version() == 1) {
|
|
2199 |
QByteArray fam;
|
|
2200 |
s >> fam;
|
|
2201 |
font.d->request.family = QString::fromLatin1(fam);
|
|
2202 |
} else {
|
|
2203 |
s >> font.d->request.family;
|
|
2204 |
}
|
|
2205 |
|
|
2206 |
if (s.version() >= QDataStream::Qt_4_0) {
|
|
2207 |
// 4.0
|
|
2208 |
double pointSize;
|
|
2209 |
qint32 pixelSize;
|
|
2210 |
s >> pointSize;
|
|
2211 |
s >> pixelSize;
|
|
2212 |
font.d->request.pointSize = qreal(pointSize);
|
|
2213 |
font.d->request.pixelSize = pixelSize;
|
|
2214 |
} else {
|
|
2215 |
qint16 pointSize, pixelSize = -1;
|
|
2216 |
s >> pointSize;
|
|
2217 |
if (s.version() >= 4)
|
|
2218 |
s >> pixelSize;
|
|
2219 |
font.d->request.pointSize = qreal(pointSize / 10.);
|
|
2220 |
font.d->request.pixelSize = pixelSize;
|
|
2221 |
}
|
|
2222 |
s >> styleHint;
|
|
2223 |
if (s.version() >= QDataStream::Qt_3_1)
|
|
2224 |
s >> styleStrategy;
|
|
2225 |
|
|
2226 |
s >> charSet;
|
|
2227 |
s >> weight;
|
|
2228 |
s >> bits;
|
|
2229 |
|
|
2230 |
font.d->request.styleHint = styleHint;
|
|
2231 |
font.d->request.styleStrategy = styleStrategy;
|
|
2232 |
font.d->request.weight = weight;
|
|
2233 |
|
|
2234 |
set_font_bits(s.version(), bits, font.d.data());
|
|
2235 |
|
|
2236 |
if (s.version() >= QDataStream::Qt_4_3) {
|
|
2237 |
quint16 stretch;
|
|
2238 |
s >> stretch;
|
|
2239 |
font.d->request.stretch = stretch;
|
|
2240 |
}
|
|
2241 |
|
|
2242 |
if (s.version() >= QDataStream::Qt_4_4) {
|
|
2243 |
quint8 extendedBits;
|
|
2244 |
s >> extendedBits;
|
|
2245 |
set_extended_font_bits(extendedBits, font.d.data());
|
|
2246 |
}
|
|
2247 |
if (s.version() >= QDataStream::Qt_4_5) {
|
|
2248 |
int value;
|
|
2249 |
s >> value;
|
|
2250 |
font.d->letterSpacing.setValue(value);
|
|
2251 |
s >> value;
|
|
2252 |
font.d->wordSpacing.setValue(value);
|
|
2253 |
}
|
|
2254 |
|
|
2255 |
return s;
|
|
2256 |
}
|
|
2257 |
|
|
2258 |
#endif // QT_NO_DATASTREAM
|
|
2259 |
|
|
2260 |
|
|
2261 |
/*****************************************************************************
|
|
2262 |
QFontInfo member functions
|
|
2263 |
*****************************************************************************/
|
|
2264 |
|
|
2265 |
/*!
|
|
2266 |
\class QFontInfo
|
|
2267 |
\reentrant
|
|
2268 |
|
|
2269 |
\brief The QFontInfo class provides general information about fonts.
|
|
2270 |
|
|
2271 |
\ingroup appearance
|
|
2272 |
\ingroup shared
|
|
2273 |
|
|
2274 |
The QFontInfo class provides the same access functions as QFont,
|
|
2275 |
e.g. family(), pointSize(), italic(), weight(), fixedPitch(),
|
|
2276 |
styleHint() etc. But whilst the QFont access functions return the
|
|
2277 |
values that were set, a QFontInfo object returns the values that
|
|
2278 |
apply to the font that will actually be used to draw the text.
|
|
2279 |
|
|
2280 |
For example, when the program asks for a 25pt Courier font on a
|
|
2281 |
machine that has a non-scalable 24pt Courier font, QFont will
|
|
2282 |
(normally) use the 24pt Courier for rendering. In this case,
|
|
2283 |
QFont::pointSize() returns 25 and QFontInfo::pointSize() returns
|
|
2284 |
24.
|
|
2285 |
|
|
2286 |
There are three ways to create a QFontInfo object.
|
|
2287 |
\list 1
|
|
2288 |
\o Calling the QFontInfo constructor with a QFont creates a font
|
|
2289 |
info object for a screen-compatible font, i.e. the font cannot be
|
|
2290 |
a printer font. If the font is changed later, the font
|
|
2291 |
info object is \e not updated.
|
|
2292 |
|
|
2293 |
(Note: If you use a printer font the values returned may be
|
|
2294 |
inaccurate. Printer fonts are not always accessible so the nearest
|
|
2295 |
screen font is used if a printer font is supplied.)
|
|
2296 |
|
|
2297 |
\o QWidget::fontInfo() returns the font info for a widget's font.
|
|
2298 |
This is equivalent to calling QFontInfo(widget->font()). If the
|
|
2299 |
widget's font is changed later, the font info object is \e not
|
|
2300 |
updated.
|
|
2301 |
|
|
2302 |
\o QPainter::fontInfo() returns the font info for a painter's
|
|
2303 |
current font. If the painter's font is changed later, the font
|
|
2304 |
info object is \e not updated.
|
|
2305 |
\endlist
|
|
2306 |
|
|
2307 |
\sa QFont QFontMetrics QFontDatabase
|
|
2308 |
*/
|
|
2309 |
|
|
2310 |
/*!
|
|
2311 |
Constructs a font info object for \a font.
|
|
2312 |
|
|
2313 |
The font must be screen-compatible, i.e. a font you use when
|
|
2314 |
drawing text in \link QWidget widgets\endlink or \link QPixmap
|
|
2315 |
pixmaps\endlink, not QPicture or QPrinter.
|
|
2316 |
|
|
2317 |
The font info object holds the information for the font that is
|
|
2318 |
passed in the constructor at the time it is created, and is not
|
|
2319 |
updated if the font's attributes are changed later.
|
|
2320 |
|
|
2321 |
Use QPainter::fontInfo() to get the font info when painting.
|
|
2322 |
This will give correct results also when painting on paint device
|
|
2323 |
that is not screen-compatible.
|
|
2324 |
*/
|
|
2325 |
QFontInfo::QFontInfo(const QFont &font)
|
|
2326 |
: d(font.d.data())
|
|
2327 |
{ d->ref.ref(); }
|
|
2328 |
|
|
2329 |
/*!
|
|
2330 |
Constructs a copy of \a fi.
|
|
2331 |
*/
|
|
2332 |
QFontInfo::QFontInfo(const QFontInfo &fi)
|
|
2333 |
: d(fi.d)
|
|
2334 |
{ d->ref.ref(); }
|
|
2335 |
|
|
2336 |
/*!
|
|
2337 |
Destroys the font info object.
|
|
2338 |
*/
|
|
2339 |
QFontInfo::~QFontInfo()
|
|
2340 |
{
|
|
2341 |
if (!d->ref.deref())
|
|
2342 |
delete d;
|
|
2343 |
}
|
|
2344 |
|
|
2345 |
/*!
|
|
2346 |
Assigns the font info in \a fi.
|
|
2347 |
*/
|
|
2348 |
QFontInfo &QFontInfo::operator=(const QFontInfo &fi)
|
|
2349 |
{
|
|
2350 |
qAtomicAssign(d, fi.d);
|
|
2351 |
return *this;
|
|
2352 |
}
|
|
2353 |
|
|
2354 |
/*!
|
|
2355 |
Returns the family name of the matched window system font.
|
|
2356 |
|
|
2357 |
\sa QFont::family()
|
|
2358 |
*/
|
|
2359 |
QString QFontInfo::family() const
|
|
2360 |
{
|
|
2361 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2362 |
Q_ASSERT(engine != 0);
|
|
2363 |
return engine->fontDef.family;
|
|
2364 |
}
|
|
2365 |
|
|
2366 |
/*!
|
|
2367 |
Returns the point size of the matched window system font.
|
|
2368 |
|
|
2369 |
\sa pointSizeF() QFont::pointSize()
|
|
2370 |
*/
|
|
2371 |
int QFontInfo::pointSize() const
|
|
2372 |
{
|
|
2373 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2374 |
Q_ASSERT(engine != 0);
|
|
2375 |
return qRound(engine->fontDef.pointSize);
|
|
2376 |
}
|
|
2377 |
|
|
2378 |
/*!
|
|
2379 |
Returns the point size of the matched window system font.
|
|
2380 |
|
|
2381 |
\sa QFont::pointSizeF()
|
|
2382 |
*/
|
|
2383 |
qreal QFontInfo::pointSizeF() const
|
|
2384 |
{
|
|
2385 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2386 |
Q_ASSERT(engine != 0);
|
|
2387 |
return engine->fontDef.pointSize;
|
|
2388 |
}
|
|
2389 |
|
|
2390 |
/*!
|
|
2391 |
Returns the pixel size of the matched window system font.
|
|
2392 |
|
|
2393 |
\sa QFont::pointSize()
|
|
2394 |
*/
|
|
2395 |
int QFontInfo::pixelSize() const
|
|
2396 |
{
|
|
2397 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2398 |
Q_ASSERT(engine != 0);
|
|
2399 |
return engine->fontDef.pixelSize;
|
|
2400 |
}
|
|
2401 |
|
|
2402 |
/*!
|
|
2403 |
Returns the italic value of the matched window system font.
|
|
2404 |
|
|
2405 |
\sa QFont::italic()
|
|
2406 |
*/
|
|
2407 |
bool QFontInfo::italic() const
|
|
2408 |
{
|
|
2409 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2410 |
Q_ASSERT(engine != 0);
|
|
2411 |
return engine->fontDef.style != QFont::StyleNormal;
|
|
2412 |
}
|
|
2413 |
|
|
2414 |
/*!
|
|
2415 |
Returns the style value of the matched window system font.
|
|
2416 |
|
|
2417 |
\sa QFont::style()
|
|
2418 |
*/
|
|
2419 |
QFont::Style QFontInfo::style() const
|
|
2420 |
{
|
|
2421 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2422 |
Q_ASSERT(engine != 0);
|
|
2423 |
return (QFont::Style)engine->fontDef.style;
|
|
2424 |
}
|
|
2425 |
|
|
2426 |
/*!
|
|
2427 |
Returns the weight of the matched window system font.
|
|
2428 |
|
|
2429 |
\sa QFont::weight(), bold()
|
|
2430 |
*/
|
|
2431 |
int QFontInfo::weight() const
|
|
2432 |
{
|
|
2433 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2434 |
Q_ASSERT(engine != 0);
|
|
2435 |
return engine->fontDef.weight;
|
|
2436 |
|
|
2437 |
}
|
|
2438 |
|
|
2439 |
/*!
|
|
2440 |
\fn bool QFontInfo::bold() const
|
|
2441 |
|
|
2442 |
Returns true if weight() would return a value greater than
|
|
2443 |
QFont::Normal; otherwise returns false.
|
|
2444 |
|
|
2445 |
\sa weight(), QFont::bold()
|
|
2446 |
*/
|
|
2447 |
|
|
2448 |
/*!
|
|
2449 |
Returns the underline value of the matched window system font.
|
|
2450 |
|
|
2451 |
\sa QFont::underline()
|
|
2452 |
|
|
2453 |
\internal
|
|
2454 |
|
|
2455 |
Here we read the underline flag directly from the QFont.
|
|
2456 |
This is OK for X11 and for Windows because we always get what we want.
|
|
2457 |
*/
|
|
2458 |
bool QFontInfo::underline() const
|
|
2459 |
{
|
|
2460 |
return d->underline;
|
|
2461 |
}
|
|
2462 |
|
|
2463 |
/*!
|
|
2464 |
Returns the overline value of the matched window system font.
|
|
2465 |
|
|
2466 |
\sa QFont::overline()
|
|
2467 |
|
|
2468 |
\internal
|
|
2469 |
|
|
2470 |
Here we read the overline flag directly from the QFont.
|
|
2471 |
This is OK for X11 and for Windows because we always get what we want.
|
|
2472 |
*/
|
|
2473 |
bool QFontInfo::overline() const
|
|
2474 |
{
|
|
2475 |
return d->overline;
|
|
2476 |
}
|
|
2477 |
|
|
2478 |
/*!
|
|
2479 |
Returns the strikeout value of the matched window system font.
|
|
2480 |
|
|
2481 |
\sa QFont::strikeOut()
|
|
2482 |
|
|
2483 |
\internal Here we read the strikeOut flag directly from the QFont.
|
|
2484 |
This is OK for X11 and for Windows because we always get what we want.
|
|
2485 |
*/
|
|
2486 |
bool QFontInfo::strikeOut() const
|
|
2487 |
{
|
|
2488 |
return d->strikeOut;
|
|
2489 |
}
|
|
2490 |
|
|
2491 |
/*!
|
|
2492 |
Returns the fixed pitch value of the matched window system font.
|
|
2493 |
|
|
2494 |
\sa QFont::fixedPitch()
|
|
2495 |
*/
|
|
2496 |
bool QFontInfo::fixedPitch() const
|
|
2497 |
{
|
|
2498 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2499 |
Q_ASSERT(engine != 0);
|
|
2500 |
#ifdef Q_OS_MAC
|
|
2501 |
if (!engine->fontDef.fixedPitchComputed) {
|
|
2502 |
QChar ch[2] = { QLatin1Char('i'), QLatin1Char('m') };
|
|
2503 |
QGlyphLayoutArray<2> g;
|
|
2504 |
int l = 2;
|
|
2505 |
engine->stringToCMap(ch, 2, &g, &l, 0);
|
|
2506 |
engine->fontDef.fixedPitch = g.advances_x[0] == g.advances_x[1];
|
|
2507 |
engine->fontDef.fixedPitchComputed = true;
|
|
2508 |
}
|
|
2509 |
#endif
|
|
2510 |
return engine->fontDef.fixedPitch;
|
|
2511 |
}
|
|
2512 |
|
|
2513 |
/*!
|
|
2514 |
Returns the style of the matched window system font.
|
|
2515 |
|
|
2516 |
Currently only returns the style hint set in QFont.
|
|
2517 |
|
|
2518 |
\sa QFont::styleHint() QFont::StyleHint
|
|
2519 |
*/
|
|
2520 |
QFont::StyleHint QFontInfo::styleHint() const
|
|
2521 |
{
|
|
2522 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2523 |
Q_ASSERT(engine != 0);
|
|
2524 |
return (QFont::StyleHint) engine->fontDef.styleHint;
|
|
2525 |
}
|
|
2526 |
|
|
2527 |
/*!
|
|
2528 |
Returns true if the font is a raw mode font; otherwise returns
|
|
2529 |
false.
|
|
2530 |
|
|
2531 |
If it is a raw mode font, all other functions in QFontInfo will
|
|
2532 |
return the same values set in the QFont, regardless of the font
|
|
2533 |
actually used.
|
|
2534 |
|
|
2535 |
\sa QFont::rawMode()
|
|
2536 |
*/
|
|
2537 |
bool QFontInfo::rawMode() const
|
|
2538 |
{
|
|
2539 |
return d->rawMode;
|
|
2540 |
}
|
|
2541 |
|
|
2542 |
/*!
|
|
2543 |
Returns true if the matched window system font is exactly the same
|
|
2544 |
as the one specified by the font; otherwise returns false.
|
|
2545 |
|
|
2546 |
\sa QFont::exactMatch()
|
|
2547 |
*/
|
|
2548 |
bool QFontInfo::exactMatch() const
|
|
2549 |
{
|
|
2550 |
QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
|
|
2551 |
Q_ASSERT(engine != 0);
|
|
2552 |
return (d->rawMode
|
|
2553 |
? engine->type() != QFontEngine::Box
|
|
2554 |
: d->request.exactMatch(engine->fontDef));
|
|
2555 |
}
|
|
2556 |
|
|
2557 |
|
|
2558 |
|
|
2559 |
|
|
2560 |
// **********************************************************************
|
|
2561 |
// QFontCache
|
|
2562 |
// **********************************************************************
|
|
2563 |
|
|
2564 |
#ifdef QFONTCACHE_DEBUG
|
|
2565 |
// fast timeouts for debugging
|
|
2566 |
static const int fast_timeout = 1000; // 1s
|
|
2567 |
static const int slow_timeout = 5000; // 5s
|
|
2568 |
#else
|
|
2569 |
static const int fast_timeout = 10000; // 10s
|
|
2570 |
static const int slow_timeout = 300000; // 5m
|
|
2571 |
#endif // QFONTCACHE_DEBUG
|
|
2572 |
|
|
2573 |
const uint QFontCache::min_cost = 4*1024; // 4mb
|
|
2574 |
|
|
2575 |
#ifdef QT_NO_THREAD
|
|
2576 |
Q_GLOBAL_STATIC(QFontCache, theFontCache)
|
|
2577 |
|
|
2578 |
QFontCache *QFontCache::instance()
|
|
2579 |
{
|
|
2580 |
return theFontCache();
|
|
2581 |
}
|
|
2582 |
|
|
2583 |
void QFontCache::cleanup()
|
|
2584 |
{
|
|
2585 |
}
|
|
2586 |
#else
|
|
2587 |
Q_GLOBAL_STATIC(QThreadStorage<QFontCache *>, theFontCache)
|
|
2588 |
|
|
2589 |
QFontCache *QFontCache::instance()
|
|
2590 |
{
|
|
2591 |
QFontCache *&fontCache = theFontCache()->localData();
|
|
2592 |
if (!fontCache)
|
|
2593 |
fontCache = new QFontCache;
|
|
2594 |
return fontCache;
|
|
2595 |
}
|
|
2596 |
|
|
2597 |
void QFontCache::cleanup()
|
|
2598 |
{
|
|
2599 |
QThreadStorage<QFontCache *> *cache = 0;
|
|
2600 |
QT_TRY {
|
|
2601 |
cache = theFontCache();
|
|
2602 |
} QT_CATCH (const std::bad_alloc &) {
|
|
2603 |
// no cache - just ignore
|
|
2604 |
}
|
|
2605 |
if (cache && cache->hasLocalData())
|
|
2606 |
cache->setLocalData(0);
|
|
2607 |
}
|
|
2608 |
#endif // QT_NO_THREAD
|
|
2609 |
|
|
2610 |
QFontCache::QFontCache()
|
|
2611 |
: QObject(), total_cost(0), max_cost(min_cost),
|
|
2612 |
current_timestamp(0), fast(false), timer_id(-1)
|
|
2613 |
{
|
|
2614 |
}
|
|
2615 |
|
|
2616 |
QFontCache::~QFontCache()
|
|
2617 |
{
|
|
2618 |
{
|
|
2619 |
EngineDataCache::ConstIterator it = engineDataCache.constBegin(),
|
|
2620 |
end = engineDataCache.constEnd();
|
|
2621 |
while (it != end) {
|
|
2622 |
if (it.value()->ref == 0)
|
|
2623 |
delete it.value();
|
|
2624 |
else
|
|
2625 |
FC_DEBUG("QFontCache::~QFontCache: engineData %p still has refcount %d",
|
|
2626 |
it.value(), int(it.value()->ref));
|
|
2627 |
++it;
|
|
2628 |
}
|
|
2629 |
}
|
|
2630 |
EngineCache::ConstIterator it = engineCache.constBegin(),
|
|
2631 |
end = engineCache.constEnd();
|
|
2632 |
while (it != end) {
|
|
2633 |
if (--it.value().data->cache_count == 0) {
|
|
2634 |
if (it.value().data->ref == 0) {
|
|
2635 |
FC_DEBUG("QFontCache::~QFontCache: deleting engine %p key=(%d / %g %d %d %d %d)",
|
|
2636 |
it.value().data, it.key().script, it.key().def.pointSize,
|
|
2637 |
it.key().def.pixelSize, it.key().def.weight, it.key().def.style,
|
|
2638 |
it.key().def.fixedPitch);
|
|
2639 |
|
|
2640 |
delete it.value().data;
|
|
2641 |
} else {
|
|
2642 |
FC_DEBUG("QFontCache::~QFontCache: engine = %p still has refcount %d",
|
|
2643 |
it.value().data, int(it.value().data->ref));
|
|
2644 |
}
|
|
2645 |
}
|
|
2646 |
++it;
|
|
2647 |
}
|
|
2648 |
}
|
|
2649 |
|
|
2650 |
void QFontCache::clear()
|
|
2651 |
{
|
|
2652 |
{
|
|
2653 |
EngineDataCache::Iterator it = engineDataCache.begin(),
|
|
2654 |
end = engineDataCache.end();
|
|
2655 |
while (it != end) {
|
|
2656 |
QFontEngineData *data = it.value();
|
|
2657 |
#if !defined(Q_WS_MAC)
|
|
2658 |
for (int i = 0; i < QUnicodeTables::ScriptCount; ++i) {
|
|
2659 |
if (data->engines[i]) {
|
|
2660 |
data->engines[i]->ref.deref();
|
|
2661 |
data->engines[i] = 0;
|
|
2662 |
}
|
|
2663 |
}
|
|
2664 |
#else
|
|
2665 |
if (data->engine) {
|
|
2666 |
data->engine->ref.deref();
|
|
2667 |
data->engine = 0;
|
|
2668 |
}
|
|
2669 |
#endif
|
|
2670 |
++it;
|
|
2671 |
}
|
|
2672 |
}
|
|
2673 |
|
|
2674 |
for (EngineCache::Iterator it = engineCache.begin(), end = engineCache.end();
|
|
2675 |
it != end; ++it) {
|
|
2676 |
if (it->data->ref == 0) {
|
|
2677 |
delete it->data;
|
|
2678 |
it->data = 0;
|
|
2679 |
}
|
|
2680 |
}
|
|
2681 |
|
|
2682 |
for (EngineCache::Iterator it = engineCache.begin(), end = engineCache.end();
|
|
2683 |
it != end; ++it) {
|
|
2684 |
if (it->data && it->data->ref == 0) {
|
|
2685 |
delete it->data;
|
|
2686 |
it->data = 0;
|
|
2687 |
}
|
|
2688 |
}
|
|
2689 |
|
|
2690 |
engineCache.clear();
|
|
2691 |
}
|
|
2692 |
|
|
2693 |
#if defined(Q_WS_QWS) && !defined(QT_NO_QWS_QPF2)
|
|
2694 |
void QFontCache::removeEngineForFont(const QByteArray &_fontName)
|
|
2695 |
{
|
|
2696 |
|
|
2697 |
/* This could be optimized but the code becomes much more complex if we want to handle multi
|
|
2698 |
* font engines and it is probably not worth it. Therefore we just clear the entire font cache.
|
|
2699 |
*/
|
|
2700 |
Q_UNUSED(_fontName);
|
|
2701 |
clear();
|
|
2702 |
}
|
|
2703 |
#endif
|
|
2704 |
|
|
2705 |
QFontEngineData *QFontCache::findEngineData(const Key &key) const
|
|
2706 |
{
|
|
2707 |
EngineDataCache::ConstIterator it = engineDataCache.find(key),
|
|
2708 |
end = engineDataCache.end();
|
|
2709 |
if (it == end) return 0;
|
|
2710 |
|
|
2711 |
// found
|
|
2712 |
return it.value();
|
|
2713 |
}
|
|
2714 |
|
|
2715 |
void QFontCache::insertEngineData(const Key &key, QFontEngineData *engineData)
|
|
2716 |
{
|
|
2717 |
FC_DEBUG("QFontCache: inserting new engine data %p", engineData);
|
|
2718 |
|
|
2719 |
engineDataCache.insert(key, engineData);
|
|
2720 |
increaseCost(sizeof(QFontEngineData));
|
|
2721 |
}
|
|
2722 |
|
|
2723 |
QFontEngine *QFontCache::findEngine(const Key &key)
|
|
2724 |
{
|
|
2725 |
EngineCache::Iterator it = engineCache.find(key),
|
|
2726 |
end = engineCache.end();
|
|
2727 |
if (it == end) return 0;
|
|
2728 |
|
|
2729 |
// found... update the hitcount and timestamp
|
|
2730 |
it.value().hits++;
|
|
2731 |
it.value().timestamp = ++current_timestamp;
|
|
2732 |
|
|
2733 |
FC_DEBUG("QFontCache: found font engine\n"
|
|
2734 |
" %p: timestamp %4u hits %3u ref %2d/%2d, type '%s'",
|
|
2735 |
it.value().data, it.value().timestamp, it.value().hits,
|
|
2736 |
int(it.value().data->ref), it.value().data->cache_count,
|
|
2737 |
it.value().data->name());
|
|
2738 |
|
|
2739 |
return it.value().data;
|
|
2740 |
}
|
|
2741 |
|
|
2742 |
void QFontCache::insertEngine(const Key &key, QFontEngine *engine)
|
|
2743 |
{
|
|
2744 |
FC_DEBUG("QFontCache: inserting new engine %p", engine);
|
|
2745 |
|
|
2746 |
Engine data(engine);
|
|
2747 |
data.timestamp = ++current_timestamp;
|
|
2748 |
|
|
2749 |
engineCache.insert(key, data);
|
|
2750 |
|
|
2751 |
// only increase the cost if this is the first time we insert the engine
|
|
2752 |
if (engine->cache_count == 0)
|
|
2753 |
increaseCost(engine->cache_cost);
|
|
2754 |
|
|
2755 |
++engine->cache_count;
|
|
2756 |
}
|
|
2757 |
|
|
2758 |
void QFontCache::increaseCost(uint cost)
|
|
2759 |
{
|
|
2760 |
cost = (cost + 512) / 1024; // store cost in kb
|
|
2761 |
cost = cost > 0 ? cost : 1;
|
|
2762 |
total_cost += cost;
|
|
2763 |
|
|
2764 |
FC_DEBUG(" COST: increased %u kb, total_cost %u kb, max_cost %u kb",
|
|
2765 |
cost, total_cost, max_cost);
|
|
2766 |
|
|
2767 |
if (total_cost > max_cost) {
|
|
2768 |
max_cost = total_cost;
|
|
2769 |
|
|
2770 |
if (timer_id == -1 || ! fast) {
|
|
2771 |
FC_DEBUG(" TIMER: starting fast timer (%d ms)", fast_timeout);
|
|
2772 |
|
|
2773 |
if (timer_id != -1) killTimer(timer_id);
|
|
2774 |
timer_id = startTimer(fast_timeout);
|
|
2775 |
fast = true;
|
|
2776 |
}
|
|
2777 |
}
|
|
2778 |
}
|
|
2779 |
|
|
2780 |
void QFontCache::decreaseCost(uint cost)
|
|
2781 |
{
|
|
2782 |
cost = (cost + 512) / 1024; // cost is stored in kb
|
|
2783 |
cost = cost > 0 ? cost : 1;
|
|
2784 |
Q_ASSERT(cost <= total_cost);
|
|
2785 |
total_cost -= cost;
|
|
2786 |
|
|
2787 |
FC_DEBUG(" COST: decreased %u kb, total_cost %u kb, max_cost %u kb",
|
|
2788 |
cost, total_cost, max_cost);
|
|
2789 |
}
|
|
2790 |
|
|
2791 |
#if defined(Q_WS_WIN) || defined (Q_WS_QWS)
|
|
2792 |
void QFontCache::cleanupPrinterFonts()
|
|
2793 |
{
|
|
2794 |
FC_DEBUG("QFontCache::cleanupPrinterFonts");
|
|
2795 |
|
|
2796 |
{
|
|
2797 |
FC_DEBUG(" CLEAN engine data:");
|
|
2798 |
|
|
2799 |
// clean out all unused engine data
|
|
2800 |
EngineDataCache::Iterator it = engineDataCache.begin(),
|
|
2801 |
end = engineDataCache.end();
|
|
2802 |
while (it != end) {
|
|
2803 |
if (it.key().screen == 0) {
|
|
2804 |
++it;
|
|
2805 |
continue;
|
|
2806 |
}
|
|
2807 |
|
|
2808 |
if(it.value()->ref != 0) {
|
|
2809 |
for(int i = 0; i < QUnicodeTables::ScriptCount; ++i) {
|
|
2810 |
if(it.value()->engines[i]) {
|
|
2811 |
it.value()->engines[i]->ref.deref();
|
|
2812 |
it.value()->engines[i] = 0;
|
|
2813 |
}
|
|
2814 |
}
|
|
2815 |
++it;
|
|
2816 |
} else {
|
|
2817 |
|
|
2818 |
EngineDataCache::Iterator rem = it++;
|
|
2819 |
|
|
2820 |
decreaseCost(sizeof(QFontEngineData));
|
|
2821 |
|
|
2822 |
FC_DEBUG(" %p", rem.value());
|
|
2823 |
|
|
2824 |
delete rem.value();
|
|
2825 |
engineDataCache.erase(rem);
|
|
2826 |
}
|
|
2827 |
}
|
|
2828 |
}
|
|
2829 |
|
|
2830 |
EngineCache::Iterator it = engineCache.begin(),
|
|
2831 |
end = engineCache.end();
|
|
2832 |
while(it != end) {
|
|
2833 |
if (it.value().data->ref != 0 || it.key().screen == 0) {
|
|
2834 |
++it;
|
|
2835 |
continue;
|
|
2836 |
}
|
|
2837 |
|
|
2838 |
FC_DEBUG(" %p: timestamp %4u hits %2u ref %2d/%2d, type '%s'",
|
|
2839 |
it.value().data, it.value().timestamp, it.value().hits,
|
|
2840 |
int(it.value().data->ref), it.value().data->cache_count,
|
|
2841 |
it.value().data->name());
|
|
2842 |
|
|
2843 |
if (--it.value().data->cache_count == 0) {
|
|
2844 |
FC_DEBUG(" DELETE: last occurrence in cache");
|
|
2845 |
|
|
2846 |
decreaseCost(it.value().data->cache_cost);
|
|
2847 |
delete it.value().data;
|
|
2848 |
}
|
|
2849 |
|
|
2850 |
engineCache.erase(it++);
|
|
2851 |
}
|
|
2852 |
}
|
|
2853 |
#endif
|
|
2854 |
|
|
2855 |
void QFontCache::timerEvent(QTimerEvent *)
|
|
2856 |
{
|
|
2857 |
FC_DEBUG("QFontCache::timerEvent: performing cache maintenance (timestamp %u)",
|
|
2858 |
current_timestamp);
|
|
2859 |
|
|
2860 |
if (total_cost <= max_cost && max_cost <= min_cost) {
|
|
2861 |
FC_DEBUG(" cache redused sufficiently, stopping timer");
|
|
2862 |
|
|
2863 |
killTimer(timer_id);
|
|
2864 |
timer_id = -1;
|
|
2865 |
fast = false;
|
|
2866 |
|
|
2867 |
return;
|
|
2868 |
}
|
|
2869 |
|
|
2870 |
// go through the cache and count up everything in use
|
|
2871 |
uint in_use_cost = 0;
|
|
2872 |
|
|
2873 |
{
|
|
2874 |
FC_DEBUG(" SWEEP engine data:");
|
|
2875 |
|
|
2876 |
// make sure the cost of each engine data is at least 1kb
|
|
2877 |
const uint engine_data_cost =
|
|
2878 |
sizeof(QFontEngineData) > 1024 ? sizeof(QFontEngineData) : 1024;
|
|
2879 |
|
|
2880 |
EngineDataCache::ConstIterator it = engineDataCache.constBegin(),
|
|
2881 |
end = engineDataCache.constEnd();
|
|
2882 |
for (; it != end; ++it) {
|
|
2883 |
#ifdef QFONTCACHE_DEBUG
|
|
2884 |
FC_DEBUG(" %p: ref %2d", it.value(), int(it.value()->ref));
|
|
2885 |
|
|
2886 |
# if defined(Q_WS_X11) || defined(Q_WS_WIN)
|
|
2887 |
// print out all engines
|
|
2888 |
for (int i = 0; i < QUnicodeTables::ScriptCount; ++i) {
|
|
2889 |
if (! it.value()->engines[i])
|
|
2890 |
continue;
|
|
2891 |
FC_DEBUG(" contains %p", it.value()->engines[i]);
|
|
2892 |
}
|
|
2893 |
# endif // Q_WS_X11 || Q_WS_WIN
|
|
2894 |
#endif // QFONTCACHE_DEBUG
|
|
2895 |
|
|
2896 |
if (it.value()->ref != 0)
|
|
2897 |
in_use_cost += engine_data_cost;
|
|
2898 |
}
|
|
2899 |
}
|
|
2900 |
|
|
2901 |
{
|
|
2902 |
FC_DEBUG(" SWEEP engine:");
|
|
2903 |
|
|
2904 |
EngineCache::ConstIterator it = engineCache.constBegin(),
|
|
2905 |
end = engineCache.constEnd();
|
|
2906 |
for (; it != end; ++it) {
|
|
2907 |
FC_DEBUG(" %p: timestamp %4u hits %2u ref %2d/%2d, cost %u bytes",
|
|
2908 |
it.value().data, it.value().timestamp, it.value().hits,
|
|
2909 |
int(it.value().data->ref), it.value().data->cache_count,
|
|
2910 |
it.value().data->cache_cost);
|
|
2911 |
|
|
2912 |
if (it.value().data->ref != 0)
|
|
2913 |
in_use_cost += it.value().data->cache_cost / it.value().data->cache_count;
|
|
2914 |
}
|
|
2915 |
|
|
2916 |
// attempt to make up for rounding errors
|
|
2917 |
in_use_cost += engineCache.size();
|
|
2918 |
}
|
|
2919 |
|
|
2920 |
in_use_cost = (in_use_cost + 512) / 1024; // cost is stored in kb
|
|
2921 |
|
|
2922 |
/*
|
|
2923 |
calculate the new maximum cost for the cache
|
|
2924 |
|
|
2925 |
NOTE: in_use_cost is *not* correct due to rounding errors in the
|
|
2926 |
above algorithm. instead of worrying about getting the
|
|
2927 |
calculation correct, we are more interested in speed, and use
|
|
2928 |
in_use_cost as a floor for new_max_cost
|
|
2929 |
*/
|
|
2930 |
uint new_max_cost = qMax(qMax(max_cost / 2, in_use_cost), min_cost);
|
|
2931 |
|
|
2932 |
FC_DEBUG(" after sweep, in use %u kb, total %u kb, max %u kb, new max %u kb",
|
|
2933 |
in_use_cost, total_cost, max_cost, new_max_cost);
|
|
2934 |
|
|
2935 |
if (new_max_cost == max_cost) {
|
|
2936 |
if (fast) {
|
|
2937 |
FC_DEBUG(" cannot shrink cache, slowing timer");
|
|
2938 |
|
|
2939 |
killTimer(timer_id);
|
|
2940 |
timer_id = startTimer(slow_timeout);
|
|
2941 |
fast = false;
|
|
2942 |
}
|
|
2943 |
|
|
2944 |
return;
|
|
2945 |
} else if (! fast) {
|
|
2946 |
FC_DEBUG(" dropping into passing gear");
|
|
2947 |
|
|
2948 |
killTimer(timer_id);
|
|
2949 |
timer_id = startTimer(fast_timeout);
|
|
2950 |
fast = true;
|
|
2951 |
}
|
|
2952 |
|
|
2953 |
max_cost = new_max_cost;
|
|
2954 |
|
|
2955 |
{
|
|
2956 |
FC_DEBUG(" CLEAN engine data:");
|
|
2957 |
|
|
2958 |
// clean out all unused engine data
|
|
2959 |
EngineDataCache::Iterator it = engineDataCache.begin(),
|
|
2960 |
end = engineDataCache.end();
|
|
2961 |
while (it != end) {
|
|
2962 |
if (it.value()->ref != 0) {
|
|
2963 |
++it;
|
|
2964 |
continue;
|
|
2965 |
}
|
|
2966 |
|
|
2967 |
EngineDataCache::Iterator rem = it++;
|
|
2968 |
|
|
2969 |
decreaseCost(sizeof(QFontEngineData));
|
|
2970 |
|
|
2971 |
FC_DEBUG(" %p", rem.value());
|
|
2972 |
|
|
2973 |
delete rem.value();
|
|
2974 |
engineDataCache.erase(rem);
|
|
2975 |
}
|
|
2976 |
}
|
|
2977 |
|
|
2978 |
// clean out the engine cache just enough to get below our new max cost
|
|
2979 |
uint current_cost;
|
|
2980 |
do {
|
|
2981 |
current_cost = total_cost;
|
|
2982 |
|
|
2983 |
EngineCache::Iterator it = engineCache.begin(),
|
|
2984 |
end = engineCache.end();
|
|
2985 |
// determine the oldest and least popular of the unused engines
|
|
2986 |
uint oldest = ~0u;
|
|
2987 |
uint least_popular = ~0u;
|
|
2988 |
|
|
2989 |
for (; it != end; ++it) {
|
|
2990 |
if (it.value().data->ref != 0)
|
|
2991 |
continue;
|
|
2992 |
|
|
2993 |
if (it.value().timestamp < oldest &&
|
|
2994 |
it.value().hits <= least_popular) {
|
|
2995 |
oldest = it.value().timestamp;
|
|
2996 |
least_popular = it.value().hits;
|
|
2997 |
}
|
|
2998 |
}
|
|
2999 |
|
|
3000 |
FC_DEBUG(" oldest %u least popular %u", oldest, least_popular);
|
|
3001 |
|
|
3002 |
for (it = engineCache.begin(); it != end; ++it) {
|
|
3003 |
if (it.value().data->ref == 0 &&
|
|
3004 |
it.value().timestamp == oldest &&
|
|
3005 |
it.value().hits == least_popular)
|
|
3006 |
break;
|
|
3007 |
}
|
|
3008 |
|
|
3009 |
if (it != end) {
|
|
3010 |
FC_DEBUG(" %p: timestamp %4u hits %2u ref %2d/%2d, type '%s'",
|
|
3011 |
it.value().data, it.value().timestamp, it.value().hits,
|
|
3012 |
int(it.value().data->ref), it.value().data->cache_count,
|
|
3013 |
it.value().data->name());
|
|
3014 |
|
|
3015 |
if (--it.value().data->cache_count == 0) {
|
|
3016 |
FC_DEBUG(" DELETE: last occurrence in cache");
|
|
3017 |
|
|
3018 |
decreaseCost(it.value().data->cache_cost);
|
|
3019 |
delete it.value().data;
|
|
3020 |
} else {
|
|
3021 |
/*
|
|
3022 |
this particular font engine is in the cache multiple
|
|
3023 |
times... set current_cost to zero, so that we can
|
|
3024 |
keep looping to get rid of all occurrences
|
|
3025 |
*/
|
|
3026 |
current_cost = 0;
|
|
3027 |
}
|
|
3028 |
|
|
3029 |
engineCache.erase(it);
|
|
3030 |
}
|
|
3031 |
} while (current_cost != total_cost && total_cost > max_cost);
|
|
3032 |
}
|
|
3033 |
|
|
3034 |
|
|
3035 |
#ifndef QT_NO_DEBUG_STREAM
|
|
3036 |
QDebug operator<<(QDebug stream, const QFont &font)
|
|
3037 |
{
|
|
3038 |
return stream << "QFont(" << font.toString() << ')';
|
|
3039 |
}
|
|
3040 |
#endif
|
|
3041 |
|
|
3042 |
QT_END_NAMESPACE
|