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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 QGRAPHICSSCENE_P_H
#define QGRAPHICSSCENE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp. This header
// file may change from version to version without notice, or even be removed.
//
// We mean it.
//
#include "qgraphicsscene.h"
#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
#include "qgraphicssceneevent.h"
#include "qgraphicsscene_bsp_p.h"
#include "qgraphicsitem_p.h"
#include <private/qobject_p.h>
#include <QtCore/qbitarray.h>
#include <QtCore/qlist.h>
#include <QtCore/qmap.h>
#include <QtCore/qset.h>
#include <QtGui/qfont.h>
#include <QtGui/qpalette.h>
#include <QtGui/qstyle.h>
QT_BEGIN_NAMESPACE
class QGraphicsView;
class QGraphicsWidget;
class QGesture;
class QGraphicsScenePrivate : public QObjectPrivate
{
Q_DECLARE_PUBLIC(QGraphicsScene)
public:
QGraphicsScenePrivate();
void init();
quint32 changedSignalMask;
QGraphicsScene::ItemIndexMethod indexMethod;
int bspTreeDepth;
QList<QGraphicsItem *> estimateItemsInRect(const QRectF &rect) const;
void addToIndex(QGraphicsItem *item);
void removeFromIndex(QGraphicsItem *item);
void resetIndex();
QGraphicsSceneBspTree bspTree;
void _q_updateIndex();
int lastItemCount;
QRectF sceneRect;
bool hasSceneRect;
QRectF growingItemsBoundingRect;
QRectF largestUntransformableItem;
void _q_emitUpdated();
QList<QRectF> updatedRects;
bool updateAll;
bool calledEmitUpdated;
QPainterPath selectionArea;
int selectionChanging;
QSet<QGraphicsItem *> selectedItems;
QList<QGraphicsItem *> unindexedItems;
QList<QGraphicsItem *> indexedItems;
QList<QGraphicsItem *> dirtyItems;
QList<QGraphicsItem *> pendingUpdateItems;
QList<QGraphicsItem *> unpolishedItems;
QList<QGraphicsItem *> topLevelItems;
QMap<QGraphicsItem *, QPointF> movingItemsInitialPositions;
void registerTopLevelItem(QGraphicsItem *item);
void unregisterTopLevelItem(QGraphicsItem *item);
void _q_updateLater();
void _q_polishItems();
void _q_resetDirtyItems();
void resetDirtyItemsLater();
bool dirtyItemResetPending;
QList<int> freeItemIndexes;
bool regenerateIndex;
bool purgePending;
void _q_removeItemLater(QGraphicsItem *item);
QSet<QGraphicsItem *> removedItems;
void purgeRemovedItems();
QBrush backgroundBrush;
QBrush foregroundBrush;
int indexTimerId;
bool restartIndexTimer;
void startIndexTimer();
bool stickyFocus;
bool hasFocus;
QGraphicsItem *focusItem;
QGraphicsItem *lastFocusItem;
QGraphicsWidget *tabFocusFirst;
QGraphicsWidget *activeWindow;
int activationRefCount;
QList<QGraphicsWidget *> popupWidgets;
void addPopup(QGraphicsWidget *widget);
void removePopup(QGraphicsWidget *widget, bool itemIsDying = false);
QGraphicsItem *lastMouseGrabberItem;
bool lastMouseGrabberItemHasImplicitMouseGrab;
QList<QGraphicsItem *> mouseGrabberItems;
void grabMouse(QGraphicsItem *item, bool implicit = false);
void ungrabMouse(QGraphicsItem *item, bool itemIsDying = false);
void clearMouseGrabber();
QList<QGraphicsItem *> keyboardGrabberItems;
void grabKeyboard(QGraphicsItem *item);
void ungrabKeyboard(QGraphicsItem *item, bool itemIsDying = false);
void clearKeyboardGrabber();
QGraphicsItem *dragDropItem;
QGraphicsWidget *enterWidget;
Qt::DropAction lastDropAction;
QList<QGraphicsItem *> cachedItemsUnderMouse;
QList<QGraphicsItem *> hoverItems;
bool allItemsIgnoreHoverEvents;
bool allItemsUseDefaultCursor;
void enableMouseTrackingOnViews();
QMap<Qt::MouseButton, QPointF> mouseGrabberButtonDownPos;
QMap<Qt::MouseButton, QPointF> mouseGrabberButtonDownScenePos;
QMap<Qt::MouseButton, QPoint> mouseGrabberButtonDownScreenPos;
QList<QGraphicsItem *> itemsAtPosition(const QPoint &screenPos,
const QPointF &scenePos,
QWidget *widget) const;
static bool itemCollidesWithPath(QGraphicsItem *item, const QPainterPath &path, Qt::ItemSelectionMode mode);
void storeMouseButtonsForMouseGrabber(QGraphicsSceneMouseEvent *event);
QList<QGraphicsView *> views;
void addView(QGraphicsView *view);
void removeView(QGraphicsView *view);
bool painterStateProtection;
QMultiMap<QGraphicsItem *, QGraphicsItem *> sceneEventFilters;
void installSceneEventFilter(QGraphicsItem *watched, QGraphicsItem *filter);
void removeSceneEventFilter(QGraphicsItem *watched, QGraphicsItem *filter);
bool filterEvent(QGraphicsItem *item, QEvent *event);
bool sendEvent(QGraphicsItem *item, QEvent *event);
bool dispatchHoverEvent(QGraphicsSceneHoverEvent *hoverEvent);
bool itemAcceptsHoverEvents_helper(const QGraphicsItem *item) const;
void leaveScene();
void cloneDragDropEvent(QGraphicsSceneDragDropEvent *dest,
QGraphicsSceneDragDropEvent *source);
void sendDragDropEvent(QGraphicsItem *item,
QGraphicsSceneDragDropEvent *dragDropEvent);
void sendHoverEvent(QEvent::Type type, QGraphicsItem *item,
QGraphicsSceneHoverEvent *hoverEvent);
void sendMouseEvent(QGraphicsSceneMouseEvent *mouseEvent);
void mousePressEventHandler(QGraphicsSceneMouseEvent *mouseEvent);
QGraphicsWidget *windowForItem(const QGraphicsItem *item) const;
QList<QGraphicsItem *> items_helper(const QPointF &pos) const;
QList<QGraphicsItem *> items_helper(const QRectF &rect,
Qt::ItemSelectionMode mode,
Qt::SortOrder order) const;
QList<QGraphicsItem *> items_helper(const QPolygonF &rect,
Qt::ItemSelectionMode mode,
Qt::SortOrder order) const;
QList<QGraphicsItem *> items_helper(const QPainterPath &rect,
Qt::ItemSelectionMode mode,
Qt::SortOrder order) const;
void childItems_helper(QList<QGraphicsItem *> *items,
const QGraphicsItem *parent,
const QPointF &pos) const;
void childItems_helper(QList<QGraphicsItem *> *items,
const QGraphicsItem *parent,
const QRectF &rect,
Qt::ItemSelectionMode mode) const;
void childItems_helper(QList<QGraphicsItem *> *items,
const QGraphicsItem *parent,
const QPolygonF &polygon,
Qt::ItemSelectionMode mode) const;
void childItems_helper(QList<QGraphicsItem *> *items,
const QGraphicsItem *parent,
const QPainterPath &path,
Qt::ItemSelectionMode mode) const;
bool sortCacheEnabled;
bool updatingSortCache;
void invalidateSortCache();
static void climbTree(QGraphicsItem *item, int *stackingOrder);
void _q_updateSortCache();
static bool closestItemFirst_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
static bool closestItemLast_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
static inline bool closestItemFirst_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
{
return item1->d_ptr->globalStackingOrder < item2->d_ptr->globalStackingOrder;
}
static inline bool closestItemLast_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
{
return item1->d_ptr->globalStackingOrder >= item2->d_ptr->globalStackingOrder;
}
static void sortItems(QList<QGraphicsItem *> *itemList, Qt::SortOrder order, bool cached);
void drawItemHelper(QGraphicsItem *item, QPainter *painter,
const QStyleOptionGraphicsItem *option, QWidget *widget,
bool painterStateProtection);
QStyle *style;
QFont font;
void setFont_helper(const QFont &font);
void resolveFont();
void updateFont(const QFont &font);
QPalette palette;
void setPalette_helper(const QPalette &palette);
void resolvePalette();
void updatePalette(const QPalette &palette);
// items with gestures -> list of started gestures.
QMap<QGraphicsItem*, QSet<QGesture*> > itemsWithGestures;
QSet<int> grabbedGestures;
void grabGesture(QGraphicsItem *item, int gestureId);
void releaseGesture(QGraphicsItem *item, int gestureId);
void sendGestureEvent(const QSet<QGesture*> &gestures, const QSet<QString> &cancelled);
mutable QVector<QTransform> sceneTransformCache;
mutable QBitArray validTransforms;
mutable QVector<int> freeSceneTransformSlots;
QMap<int, QGraphicsSceneTouchEvent::TouchPoint> sceneCurrentTouchPoints;
QHash<int, QGraphicsItem *> itemForTouchPointId;
static void updateTouchPointsForItem(QGraphicsItem *item, QGraphicsSceneTouchEvent *touchEvent);
int findClosestTouchPointId(const QPointF &scenePos);
void touchEventHandler(QGraphicsSceneTouchEvent *touchEvent);
bool sendTouchBeginEvent(QGraphicsItem *item, QGraphicsSceneTouchEvent *touchEvent);
};
QT_END_NAMESPACE
#endif // QT_NO_GRAPHICSVIEW
#endif
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