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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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#ifndef QMDIAREA_P_H
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#define QMDIAREA_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "qmdiarea.h"
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#include "qmdisubwindow.h"
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#ifndef QT_NO_MDIAREA
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#include <QList>
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#include <QRect>
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#include <QPoint>
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#include <QtGui/qapplication.h>
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#include <private/qmdisubwindow_p.h>
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#include <private/qabstractscrollarea_p.h>
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QT_BEGIN_NAMESPACE
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namespace QMdi {
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class Rearranger
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{
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public:
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enum Type {
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RegularTiler,
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SimpleCascader,
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IconTiler
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};
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// Rearranges widgets relative to domain.
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virtual void rearrange(QList<QWidget *> &widgets, const QRect &domain) const = 0;
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virtual Type type() const = 0;
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virtual ~Rearranger() {}
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};
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class RegularTiler : public Rearranger
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{
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// Rearranges widgets according to a regular tiling pattern
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// covering the entire domain.
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// Both positions and sizes may change.
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void rearrange(QList<QWidget *> &widgets, const QRect &domain) const;
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inline Type type() const { return Rearranger::RegularTiler; }
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};
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class SimpleCascader : public Rearranger
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{
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// Rearranges widgets according to a simple, regular cascading pattern.
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// Widgets are resized to minimumSize.
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// Both positions and sizes may change.
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void rearrange(QList<QWidget *> &widgets, const QRect &domain) const;
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inline Type type() const { return Rearranger::SimpleCascader; }
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};
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class IconTiler : public Rearranger
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{
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// Rearranges icons (assumed to be the same size) according to a regular
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// tiling pattern filling up the domain from the bottom.
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// Only positions may change.
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void rearrange(QList<QWidget *> &widgets, const QRect &domain) const;
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inline Type type() const { return Rearranger::IconTiler; }
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};
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class Placer
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{
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public:
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// Places the rectangle defined by 'size' relative to 'rects' and 'domain'.
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// Returns the position of the resulting rectangle.
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virtual QPoint place(
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const QSize &size, const QList<QRect> &rects, const QRect &domain) const = 0;
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virtual ~Placer() {}
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};
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class MinOverlapPlacer : public Placer
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{
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QPoint place(const QSize &size, const QList<QRect> &rects, const QRect &domain) const;
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static int accumulatedOverlap(const QRect &source, const QList<QRect> &rects);
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static QRect findMinOverlapRect(const QList<QRect> &source, const QList<QRect> &rects);
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static void getCandidatePlacements(
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const QSize &size, const QList<QRect> &rects, const QRect &domain,
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QList<QRect> &candidates);
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static QPoint findBestPlacement(
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const QRect &domain, const QList<QRect> &rects, QList<QRect> &source);
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static void findNonInsiders(
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const QRect &domain, QList<QRect> &source, QList<QRect> &result);
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static void findMaxOverlappers(
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const QRect &domain, const QList<QRect> &source, QList<QRect> &result);
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};
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} // namespace QMdi
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class QMdiAreaTabBar;
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class QMdiAreaPrivate : public QAbstractScrollAreaPrivate
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{
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Q_DECLARE_PUBLIC(QMdiArea)
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public:
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QMdiAreaPrivate();
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// Variables.
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QMdi::Rearranger *cascader;
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QMdi::Rearranger *regularTiler;
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QMdi::Rearranger *iconTiler;
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QMdi::Placer *placer;
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#ifndef QT_NO_RUBBERBAND
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QRubberBand *rubberBand;
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#endif
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QMdiAreaTabBar *tabBar;
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QList<QMdi::Rearranger *> pendingRearrangements;
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QList< QPointer<QMdiSubWindow> > pendingPlacements;
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QList< QPointer<QMdiSubWindow> > childWindows;
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QList<int> indicesToActivatedChildren;
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QPointer<QMdiSubWindow> active;
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QPointer<QMdiSubWindow> aboutToBecomeActive;
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QBrush background;
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QMdiArea::WindowOrder activationOrder;
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QMdiArea::AreaOptions options;
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QMdiArea::ViewMode viewMode;
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#ifndef QT_NO_TABBAR
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bool documentMode;
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#endif
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#ifndef QT_NO_TABWIDGET
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QTabWidget::TabShape tabShape;
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QTabWidget::TabPosition tabPosition;
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#endif
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bool ignoreGeometryChange;
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bool ignoreWindowStateChange;
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bool isActivated;
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bool isSubWindowsTiled;
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bool showActiveWindowMaximized;
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bool tileCalledFromResizeEvent;
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bool updatesDisabledByUs;
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bool inViewModeChange;
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int indexToNextWindow;
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int indexToPreviousWindow;
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int indexToHighlighted;
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int indexToLastActiveTab;
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int resizeTimerId;
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int tabToPreviousTimerId;
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// Slots.
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void _q_deactivateAllWindows(QMdiSubWindow *aboutToActivate = 0);
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void _q_processWindowStateChanged(Qt::WindowStates oldState, Qt::WindowStates newState);
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void _q_currentTabChanged(int index);
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// Functions.
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void appendChild(QMdiSubWindow *child);
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void place(QMdi::Placer *placer, QMdiSubWindow *child);
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void rearrange(QMdi::Rearranger *rearranger);
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void arrangeMinimizedSubWindows();
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void activateWindow(QMdiSubWindow *child);
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void activateCurrentWindow();
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void activateHighlightedWindow();
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void emitWindowActivated(QMdiSubWindow *child);
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void resetActiveWindow(QMdiSubWindow *child = 0);
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void updateActiveWindow(int removedIndex, bool activeRemoved);
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void updateScrollBars();
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void internalRaise(QMdiSubWindow *child) const;
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bool scrollBarsEnabled() const;
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bool lastWindowAboutToBeDestroyed() const;
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void setChildActivationEnabled(bool enable = true, bool onlyNextActivationEvent = false) const;
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QRect resizeToMinimumTileSize(const QSize &minSubWindowSize, int subWindowCount);
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void scrollBarPolicyChanged(Qt::Orientation, Qt::ScrollBarPolicy); // reimp
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QMdiSubWindow *nextVisibleSubWindow(int increaseFactor, QMdiArea::WindowOrder,
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int removed = -1, int fromIndex = -1) const;
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void highlightNextSubWindow(int increaseFactor);
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QList<QMdiSubWindow *> subWindowList(QMdiArea::WindowOrder, bool reversed = false) const;
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void disconnectSubWindow(QObject *subWindow);
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void setViewMode(QMdiArea::ViewMode mode);
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#ifndef QT_NO_TABBAR
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void updateTabBarGeometry();
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void refreshTabBar();
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#endif
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inline void startResizeTimer()
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{
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Q_Q(QMdiArea);
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if (resizeTimerId > 0)
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q->killTimer(resizeTimerId);
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resizeTimerId = q->startTimer(200);
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}
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inline void startTabToPreviousTimer()
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{
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Q_Q(QMdiArea);
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if (tabToPreviousTimerId > 0)
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q->killTimer(tabToPreviousTimerId);
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tabToPreviousTimerId = q->startTimer(QApplication::keyboardInputInterval());
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}
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inline bool windowStaysOnTop(QMdiSubWindow *subWindow) const
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{
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if (!subWindow)
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return false;
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return subWindow->windowFlags() & Qt::WindowStaysOnTopHint;
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}
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inline bool isExplicitlyDeactivated(QMdiSubWindow *subWindow) const
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{
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if (!subWindow)
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return true;
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return subWindow->d_func()->isExplicitlyDeactivated;
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}
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inline void setActive(QMdiSubWindow *subWindow, bool active = true, bool changeFocus = true) const
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{
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if (subWindow)
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subWindow->d_func()->setActive(active, changeFocus);
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}
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#ifndef QT_NO_RUBBERBAND
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inline void showRubberBandFor(QMdiSubWindow *subWindow)
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{
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if (!subWindow || !rubberBand)
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return;
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rubberBand->setGeometry(subWindow->geometry());
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rubberBand->raise();
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rubberBand->show();
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}
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inline void hideRubberBand()
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{
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if (rubberBand && rubberBand->isVisible())
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rubberBand->hide();
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indexToHighlighted = -1;
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}
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#endif // QT_NO_RUBBERBAND
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};
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#endif // QT_NO_MDIAREA
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QT_END_NAMESPACE
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#endif // QMDIAREA_P_H
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