summaryrefslogtreecommitdiffstats
path: root/src/gui/graphicsview/qgraphicsscene_p.h
blob: 7928a45a6dd762214895e15d4e67de65f4acd6af (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/****************************************************************************
**
** 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 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);

    QSet<QGraphicsItem*> itemsWithGestures;
    QSet<int> grabbedGestures;
    void grabGesture(QGraphicsItem *item, int gestureId);
    void releaseGesture(QGraphicsItem *item, int gestureId);

    mutable QVector<QTransform> sceneTransformCache;
    mutable QBitArray validTransforms;
    mutable QVector<int> freeSceneTransformSlots;

    QList<QGraphicsSceneTouchEvent::TouchPoint *> sceneCurrentTouchPoints;
    QHash<QGraphicsItem *, QList<QGraphicsSceneTouchEvent::TouchPoint *> > itemCurrentTouchPoints;
    QHash<int, QGraphicsItem *> itemForTouchPointId;
    static void updateTouchPointsForItem(QGraphicsItem *item, QGraphicsSceneTouchEvent *touchEvent);
    static QGraphicsSceneTouchEvent::TouchPoint *findClosestTouchPoint(const QList<QGraphicsSceneTouchEvent::TouchPoint *> &activeTouchPoints,
                                                                       const QPointF &scenePos);
    QEvent::Type appendTouchPoint(QGraphicsSceneTouchEvent::TouchPoint *touchPoint,
                                  QList<QGraphicsSceneTouchEvent::TouchPoint *> *currentTouchPoints);
    QEvent::Type removeTouchPoint(QGraphicsSceneTouchEvent::TouchPoint *touchPoint,
                                  QList<QGraphicsSceneTouchEvent::TouchPoint *> *currentTouchPoints);
    void touchEventHandler(QGraphicsSceneTouchEvent *touchEvent);
    bool sendTouchBeginEvent(QGraphicsItem *item, QGraphicsSceneTouchEvent *touchEvent);
};

QT_END_NAMESPACE

#endif // QT_NO_GRAPHICSVIEW

#endif