src/gui/kernel/qguiplatformplugin.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 14 May 2010 16:40:13 +0300
changeset 22 79de32ba3296
parent 18 2f34d5167611
child 30 5dc02b23752f
permissions -rw-r--r--
Revision: 201017 Kit: 201019

/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qguiplatformplugin_p.h"
#include <qdebug.h>
#include <qfile.h>
#include <qdir.h>
#include <qsettings.h>
#include "private/qfactoryloader_p.h"
#include "qstylefactory.h"
#include "qapplication.h"
#include "qplatformdefs.h"
#include "qicon.h"

#ifdef Q_WS_WINCE
#include "qguifunctions_wince.h"
extern bool qt_wince_is_smartphone(); //qguifunctions_wince.cpp
extern bool qt_wince_is_mobile();     //qguifunctions_wince.cpp
extern bool qt_wince_is_pocket_pc();  //qguifunctions_wince.cpp
#endif


#if defined(Q_WS_X11)
#include <private/qkde_p.h>
#include <private/qgtkstyle_p.h>
#include <private/qt_x11_p.h>
#endif


QT_BEGIN_NAMESPACE


/*! \internal
    Return (an construct if necesseray) the Gui Platform plugin.

    The plugin key to be loaded is inside the QT_PLATFORM_PLUGIN environment variable.
    If it is not set, it will be the DESKTOP_SESSION on X11.

    If no plugin can be loaded, the default one is returned.
 */
QGuiPlatformPlugin *qt_guiPlatformPlugin()
{
    static QGuiPlatformPlugin *plugin;
    if (!plugin)
    {
#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)

        QString key = QString::fromLocal8Bit(qgetenv("QT_PLATFORM_PLUGIN"));
#ifdef Q_WS_X11
        if (key.isEmpty()) {
            switch(X11->desktopEnvironment) {
            case DE_KDE:
                key = QString::fromLatin1("kde");
                break;
            default:
                key = QString::fromLocal8Bit(qgetenv("DESKTOP_SESSION"));
                break;
            }
        }
#endif

        if (!key.isEmpty() && QApplication::desktopSettingsAware()) {
            QFactoryLoader loader(QGuiPlatformPluginInterface_iid, QLatin1String("/gui_platform"));
            plugin = qobject_cast<QGuiPlatformPlugin *>(loader.instance(key));
        }
#endif // QT_NO_LIBRARY

        if(!plugin) {
            static QGuiPlatformPlugin def;
            plugin = &def;
        }
    }
    return plugin;
}


/* \class QPlatformPlugin
    QGuiPlatformPlugin can be used to integrate Qt applications in a platform built on top of Qt.
    The application developer should not know or use the plugin, it is only used by Qt internaly.

    But full platform that are built on top of Qt may provide a plugin so 3rd party Qt application
    running in the platform are integrated.
 */

/*
    The constructor can be used to install hooks in Qt
 */
QGuiPlatformPlugin::QGuiPlatformPlugin(QObject *parent) : QObject(parent) {}
QGuiPlatformPlugin::~QGuiPlatformPlugin() {}


/* return the string key to be used by default the application */
QString QGuiPlatformPlugin::styleName()
{
#if defined(Q_WS_WIN) && defined(Q_WS_WINCE)
    if (qt_wince_is_smartphone() || qt_wince_is_pocket_pc())
        return QLatin1String("WindowsMobile");
    else
        return QLatin1String("WindowsCE");
#elif defined(Q_WS_WIN)
    if ((QSysInfo::WindowsVersion >= QSysInfo::WV_VISTA
        && QSysInfo::WindowsVersion < QSysInfo::WV_NT_based))
        return QLatin1String("WindowsVista");
    else if ((QSysInfo::WindowsVersion >= QSysInfo::WV_XP
        && QSysInfo::WindowsVersion < QSysInfo::WV_NT_based))
        return QLatin1String("WindowsXP");
    else
        return QLatin1String("Windows");                // default styles for Windows
#elif defined(Q_WS_X11) && defined(Q_OS_SOLARIS)
    return QLatin1String("CDE");                        // default style for X11 on Solaris
#elif defined(Q_WS_S60)
    return QLatin1String("S60");                        // default style for Symbian with S60
#elif defined(Q_OS_SYMBIAN)
    return QLatin1String("Windows");                    // default style for Symbian without S60
#elif defined(Q_WS_X11) && defined(Q_OS_IRIX)
    return QLatin1String("SGI");                        // default style for X11 on IRIX
#elif defined(Q_WS_QWS)
    return QLatin1String("Plastique");                  // default style for X11 and small devices
#elif defined(Q_WS_MAC)
    return QLatin1String("Macintosh");              // default style for all Mac's
#elif defined(Q_WS_X11)
    QString stylename;
    switch(X11->desktopEnvironment) {
    case DE_KDE:
        stylename = QKde::kdeStyle();
        break;
    case DE_GNOME: {
        QStringList availableStyles = QStyleFactory::keys();
        // Set QGtkStyle for GNOME if available
        QString gtkStyleKey = QString::fromLatin1("GTK+");
        if (availableStyles.contains(gtkStyleKey)) {
            stylename = gtkStyleKey;
            break;
        }
        if (X11->use_xrender)
            stylename = QLatin1String("cleanlooks");
        else
            stylename = QLatin1String("windows");
        break;
    }
    case DE_CDE:
        stylename = QLatin1String("cde");
        break;
    default:
        // Don't do anything
        break;
    }
    return stylename;
#endif
}

/* return an aditional default palette  (only work on X11) */
QPalette QGuiPlatformPlugin::palette()
{
#ifdef Q_WS_X11
    if (QApplication::desktopSettingsAware() && X11->desktopEnvironment == DE_KDE)
        return QKde::kdePalette();
#endif

    return QPalette();
}

/* the default icon theme name for QIcon::fromTheme. */
QString QGuiPlatformPlugin::systemIconThemeName()
{
    QString result;
#ifdef Q_WS_X11
    if (X11->desktopEnvironment == DE_GNOME) {
        result = QString::fromLatin1("gnome");
#ifndef QT_NO_STYLE_GTK
        result = QGtkStylePrivate::getGConfString(QLatin1String("/desktop/gnome/interface/icon_theme"), result);
#endif
    } else if (X11->desktopEnvironment == DE_KDE) {
        result =  X11->desktopVersion >= 4 ? QString::fromLatin1("oxygen") : QString::fromLatin1("crystalsvg");
        QSettings settings(QKde::kdeHome() + QLatin1String("/share/config/kdeglobals"), QSettings::IniFormat);
        settings.beginGroup(QLatin1String("Icons"));
        result = settings.value(QLatin1String("Theme"), result).toString();
    }
#endif
    return result;
}


QStringList QGuiPlatformPlugin::iconThemeSearchPaths()
{
    QStringList paths;
#if defined(Q_WS_X11)
    QString xdgDirString = QFile::decodeName(getenv("XDG_DATA_DIRS"));
    if (xdgDirString.isEmpty())
        xdgDirString = QLatin1String("/usr/local/share/:/usr/share/");

    QStringList xdgDirs = xdgDirString.split(QLatin1Char(':'));

    for (int i = 0 ; i < xdgDirs.size() ; ++i) {
        QDir dir(xdgDirs[i]);
        if (dir.exists())
            paths.append(dir.path() + QLatin1String("/icons"));
    }
    if (X11->desktopEnvironment == DE_KDE) {
        paths << QLatin1Char(':') + QKde::kdeHome() + QLatin1String("/share/icons");
        QStringList kdeDirs = QFile::decodeName(getenv("KDEDIRS")).split(QLatin1Char(':'));
        for (int i = 0 ; i< kdeDirs.count() ; ++i) {
            QDir dir(QLatin1Char(':') + kdeDirs.at(i) + QLatin1String("/share/icons"));
            if (dir.exists())
                paths.append(dir.path());
        }
    }

    // Add home directory first in search path
    QDir homeDir(QDir::homePath() + QLatin1String("/.icons"));
    if (homeDir.exists())
        paths.prepend(homeDir.path());
#endif

#if defined(Q_WS_WIN)
    paths.append(qApp->applicationDirPath() + QLatin1String("/icons"));
#elif defined(Q_WS_MAC)
    paths.append(qApp->applicationDirPath() + QLatin1String("/../Resources/icons"));
#endif
    return paths;
}

/* backend for QFileIconProvider,  null icon means default */
QIcon QGuiPlatformPlugin::fileSystemIcon(const QFileInfo &)
{
    return QIcon();
}

/* Like QStyle::styleHint */
int QGuiPlatformPlugin::platformHint(PlatformHint hint)
{
    int ret = 0;
    switch(hint)
    {
        case PH_ToolButtonStyle:
            ret = Qt::ToolButtonIconOnly;
#ifdef Q_WS_X11
            if (X11->desktopEnvironment == DE_KDE && X11->desktopVersion >= 4
                && QApplication::desktopSettingsAware()) {
                ret = QKde::kdeToolButtonStyle();
            }
#endif
            break;
        case PH_ToolBarIconSize:
#ifdef Q_WS_X11
            if (X11->desktopEnvironment == DE_KDE && X11->desktopVersion >= 4
                && QApplication::desktopSettingsAware()) {
                ret = QKde::kdeToolBarIconSize();
            }
#endif
            //by default keep ret = 0 so QCommonStyle will use the style default
            break;
        default:
            break;
    }
    return ret;
}


QT_END_NAMESPACE