Long live Qt 4.5!

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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDOCKAREALAYOUT_P_H
+#define QDOCKAREALAYOUT_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "QtCore/qrect.h"
+#include "QtCore/qpair.h"
+#include "QtCore/qlist.h"
+#include "QtCore/qvector.h"
+#include "QtGui/qlayout.h"
+
+#ifndef QT_NO_DOCKWIDGET
+
+QT_BEGIN_NAMESPACE
+
+class QLayoutItem;
+class QWidget;
+class QLayoutItem;
+class QDockAreaLayoutInfo;
+class QPlaceHolderItem;
+class QDockWidget;
+class QMainWindow;
+class QWidgetAnimator;
+class QMainWindowLayout;
+struct QLayoutStruct;
+class QTabBar;
+
+// The classes in this file represent the tree structure that represents all the docks
+// Also see the wiki internal documentation
+// At the root of the tree is: QDockAreaLayout, which handles all 4 sides, so there is only one.
+// For each side it has one QDockAreaLayoutInfo child. (See QDockAreaLayout::docks.)
+// The QDockAreaLayoutInfo have QDockAreaLayoutItems as children (See QDockAreaLayoutInfo::item_list),
+// which then has one QDockAreaLayoutInfo as a child. (QDockAreaLayoutItem::subInfo) or
+// a widgetItem if this is a node of the tree (QDockAreaLayoutItem::widgetItem)
+//
+// A path indetifies uniquely one object in this tree, the first number beeing the side and all the following
+// indexes into the QDockAreaLayoutInfo::item_list.
+
+struct QDockAreaLayoutItem
+{
+    enum ItemFlags { NoFlags = 0, GapItem = 1, KeepSize = 2 };
+
+    QDockAreaLayoutItem(QLayoutItem *_widgetItem = 0);
+    QDockAreaLayoutItem(QDockAreaLayoutInfo *_subinfo);
+    QDockAreaLayoutItem(QPlaceHolderItem *_placeHolderItem);
+    QDockAreaLayoutItem(const QDockAreaLayoutItem &other);
+    ~QDockAreaLayoutItem();
+
+    QDockAreaLayoutItem &operator = (const QDockAreaLayoutItem &other);
+
+    bool skip() const;
+    QSize minimumSize() const;
+    QSize maximumSize() const;
+    QSize sizeHint() const;
+    bool expansive(Qt::Orientation o) const;
+
+    QLayoutItem *widgetItem;
+    QDockAreaLayoutInfo *subinfo;
+    QPlaceHolderItem *placeHolderItem;
+    int pos;
+    int size;
+    uint flags;
+};
+
+class Q_AUTOTEST_EXPORT QPlaceHolderItem
+{
+public:
+    QPlaceHolderItem() : hidden(false), window(false) {}
+    QPlaceHolderItem(QWidget *w);
+
+    QString objectName;
+    bool hidden, window;
+    QRect topLevelRect;
+};
+
+class Q_AUTOTEST_EXPORT QDockAreaLayoutInfo
+{
+public:
+    QDockAreaLayoutInfo();
+    QDockAreaLayoutInfo(int _sep, QInternal::DockPosition _dockPos, Qt::Orientation _o,
+                        int tbhape, QMainWindow *window);
+
+    QSize minimumSize() const;
+    QSize maximumSize() const;
+    QSize sizeHint() const;
+    QSize size() const;
+
+    bool insertGap(QList<int> path, QLayoutItem *dockWidgetItem);
+    QLayoutItem *plug(QList<int> path);
+    QLayoutItem *unplug(QList<int> path);
+    enum TabMode { NoTabs, AllowTabs, ForceTabs };
+    QList<int> gapIndex(const QPoint &pos, bool nestingEnabled,
+                            TabMode tabMode) const;
+    void remove(QList<int> path);
+    void unnest(int index);
+    void split(int index, Qt::Orientation orientation, QLayoutItem *dockWidgetItem);
+    void tab(int index, QLayoutItem *dockWidgetItem);
+    QDockAreaLayoutItem &item(QList<int> path);
+    QDockAreaLayoutInfo *info(QList<int> path);
+    QDockAreaLayoutInfo *info(QWidget *widget);
+
+    enum { // sentinel values used to validate state data
+        SequenceMarker = 0xfc,
+        TabMarker = 0xfa,
+        WidgetMarker = 0xfb
+    };
+    void saveState(QDataStream &stream) const;
+    bool restoreState(QDataStream &stream, QList<QDockWidget*> &widgets, bool testing);
+
+    void fitItems();
+    bool expansive(Qt::Orientation o) const;
+    int changeSize(int index, int size, bool below);
+    QRect itemRect(int index) const;
+    QRect itemRect(QList<int> path) const;
+    QRect separatorRect(int index) const;
+    QRect separatorRect(QList<int> path) const;
+
+    void clear();
+    bool isEmpty() const;
+    QList<int> findSeparator(const QPoint &pos) const;
+    int next(int idx) const;
+    int prev(int idx) const;
+
+    QList<int> indexOf(QWidget *widget) const;
+    QList<int> indexOfPlaceHolder(const QString &objectName) const;
+
+    void apply(bool animate);
+
+    void paintSeparators(QPainter *p, QWidget *widget, const QRegion &clip,
+                            const QPoint &mouse) const;
+    QRegion separatorRegion() const;
+    int separatorMove(int index, int delta, QVector<QLayoutStruct> *cache);
+
+    QLayoutItem *itemAt(int *x, int index) const;
+    QLayoutItem *takeAt(int *x, int index);
+    void deleteAllLayoutItems();
+
+    QMainWindowLayout *mainWindowLayout() const;
+
+    int sep;
+    QVector<QWidget*> separatorWidgets;
+    QInternal::DockPosition dockPos;
+    Qt::Orientation o;
+    QRect rect;
+    QMainWindow *mainWindow;
+    QList<QDockAreaLayoutItem> item_list;
+
+    void updateSeparatorWidgets() const;
+    QSet<QWidget*> usedSeparatorWidgets() const;
+
+#ifndef QT_NO_TABBAR
+    quintptr currentTabId() const;
+    void setCurrentTab(QWidget *widget);
+    void setCurrentTabId(quintptr id);
+    QRect tabContentRect() const;
+    bool tabbed;
+    QTabBar *tabBar;
+    QSize tabBarMin, tabBarHint;
+    int tabBarShape;
+    bool tabBarVisible;
+
+    void updateTabBar() const;
+    void setTabBarShape(int shape);
+    QSize tabBarMinimumSize() const;
+    QSize tabBarSizeHint() const;
+
+    QSet<QTabBar*> usedTabBars() const;
+#endif // QT_NO_TABBAR
+};
+
+class Q_AUTOTEST_EXPORT QDockAreaLayout
+{
+public:
+    enum { EmptyDropAreaSize = 80 }; // when a dock area is empty, how "wide" is it?
+
+    Qt::DockWidgetArea corners[4]; // use a Qt::Corner for indexing
+    QRect rect;
+    QLayoutItem *centralWidgetItem;
+    QMainWindow *mainWindow;
+    QRect centralWidgetRect;
+    QDockAreaLayout(QMainWindow *win);
+    QDockAreaLayoutInfo docks[4];
+    int sep; // separator extent
+    QVector<QWidget*> separatorWidgets;
+
+    bool isValid() const;
+
+    enum { DockWidgetStateMarker = 0xfd };
+    void saveState(QDataStream &stream) const;
+    bool restoreState(QDataStream &stream, const QList<QDockWidget*> &widgets, bool testing = false);
+
+    QList<int> indexOfPlaceHolder(const QString &objectName) const;
+    QList<int> indexOf(QWidget *dockWidget) const;
+    QList<int> gapIndex(const QPoint &pos) const;
+    QList<int> findSeparator(const QPoint &pos) const;
+
+    QDockAreaLayoutItem &item(QList<int> path);
+    QDockAreaLayoutInfo *info(QList<int> path);
+    const QDockAreaLayoutInfo *info(QList<int> path) const;
+    QDockAreaLayoutInfo *info(QWidget *widget);
+    QRect itemRect(QList<int> path) const;
+    QRect separatorRect(int index) const;
+    QRect separatorRect(QList<int> path) const;
+
+    bool insertGap(QList<int> path, QLayoutItem *dockWidgetItem);
+    QLayoutItem *plug(QList<int> path);
+    QLayoutItem *unplug(QList<int> path);
+    void remove(QList<int> path);
+
+    void fitLayout();
+
+    void clear();
+
+    QSize sizeHint() const;
+    QSize minimumSize() const;
+
+    void addDockWidget(QInternal::DockPosition pos, QDockWidget *dockWidget, Qt::Orientation orientation);
+    bool restoreDockWidget(QDockWidget *dockWidget);
+    void splitDockWidget(QDockWidget *after, QDockWidget *dockWidget,
+                         Qt::Orientation orientation);
+    void tabifyDockWidget(QDockWidget *first, QDockWidget *second);
+
+    void apply(bool animate);
+
+    void paintSeparators(QPainter *p, QWidget *widget, const QRegion &clip,
+                            const QPoint &mouse) const;
+    QRegion separatorRegion() const;
+    int separatorMove(QList<int> separator, const QPoint &origin, const QPoint &dest,
+                        QVector<QLayoutStruct> *cache);
+    void updateSeparatorWidgets() const;
+
+    QLayoutItem *itemAt(int *x, int index) const;
+    QLayoutItem *takeAt(int *x, int index);
+    void deleteAllLayoutItems();
+
+    void getGrid(QVector<QLayoutStruct> *ver_struct_list,
+                    QVector<QLayoutStruct> *hor_struct_list);
+    void setGrid(QVector<QLayoutStruct> *ver_struct_list,
+                    QVector<QLayoutStruct> *hor_struct_list);
+
+    QRect gapRect(QList<int> path) const;
+
+    void keepSize(QDockWidget *w);
+
+    QSet<QTabBar*> usedTabBars() const;
+    QSet<QWidget*> usedSeparatorWidgets() const;
+};
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_QDOCKWIDGET
+
+#endif // QDOCKAREALAYOUT_P_H