1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QGRAPHICSVIEW_P_H
5#define QGRAPHICSVIEW_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists for the convenience
12// of other Qt classes. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtWidgets/private/qtwidgetsglobal_p.h>
19#include "qgraphicsview.h"
20
21#include <QtGui/private/qevent_p.h>
22#include <QtCore/qcoreapplication.h>
23#include "qgraphicssceneevent.h"
24#include <QtWidgets/qstyleoption.h>
25#include <private/qabstractscrollarea_p.h>
26#include <private/qapplication_p.h>
27
28#include <QtCore/qpointer.h>
29
30QT_REQUIRE_CONFIG(graphicsview);
31
32QT_BEGIN_NAMESPACE
33
34class Q_WIDGETS_EXPORT QGraphicsViewPrivate : public QAbstractScrollAreaPrivate
35{
36 Q_DECLARE_PUBLIC(QGraphicsView)
37public:
38 QGraphicsViewPrivate();
39 ~QGraphicsViewPrivate();
40
41 void recalculateContentSize();
42 void centerView(QGraphicsView::ViewportAnchor anchor);
43
44 QPainter::RenderHints renderHints;
45
46 QGraphicsView::DragMode dragMode;
47
48 quint32 sceneInteractionAllowed : 1;
49 quint32 hasSceneRect : 1;
50 quint32 connectedToScene : 1;
51 quint32 useLastMouseEvent : 1;
52 quint32 identityMatrix : 1;
53 quint32 dirtyScroll : 1;
54 quint32 accelerateScrolling : 1;
55 quint32 keepLastCenterPoint : 1;
56 quint32 transforming : 1;
57 quint32 handScrolling : 1;
58 quint32 mustAllocateStyleOptions : 1;
59 quint32 mustResizeBackgroundPixmap : 1;
60 quint32 fullUpdatePending : 1;
61 quint32 hasUpdateClip : 1;
62 quint32 padding : 18;
63
64 QRectF sceneRect;
65 void updateLastCenterPoint();
66
67 qint64 horizontalScroll() const;
68 qint64 verticalScroll() const;
69
70 QRectF mapRectToScene(const QRect &rect) const;
71 QRectF mapRectFromScene(const QRectF &rect) const;
72
73 QRect updateClip;
74 QPointF mousePressItemPoint;
75 QPointF mousePressScenePoint;
76 QPoint mousePressViewPoint;
77 QPoint mousePressScreenPoint;
78 QPointF lastMouseMoveScenePoint;
79 QPointF lastRubberbandScenePoint;
80 QPoint lastMouseMoveScreenPoint;
81 QPoint dirtyScrollOffset;
82 Qt::MouseButton mousePressButton;
83 QTransform matrix;
84 qint64 scrollX, scrollY;
85 void updateScroll();
86 bool canStartScrollingAt(const QPoint &startPos) const override;
87
88 qreal leftIndent;
89 qreal topIndent;
90
91 // Replaying mouse events
92 QMutableSinglePointEvent lastMouseEvent;
93 void replayLastMouseEvent();
94 void storeMouseEvent(QMouseEvent *event);
95 void mouseMoveEventHandler(QMouseEvent *event);
96
97 QPointF lastCenterPoint;
98 Qt::Alignment alignment;
99
100 QGraphicsView::ViewportAnchor transformationAnchor;
101 QGraphicsView::ViewportAnchor resizeAnchor;
102 QGraphicsView::ViewportUpdateMode viewportUpdateMode;
103 QGraphicsView::OptimizationFlags optimizationFlags;
104
105 bool stereoEnabled = false; // Set in setupViewport()
106
107 QPointer<QGraphicsScene> scene;
108#if QT_CONFIG(rubberband)
109 QRect rubberBandRect;
110 QRegion rubberBandRegion(const QWidget *widget, const QRect &rect) const;
111 void updateRubberBand(const QMouseEvent *event);
112 void clearRubberBand();
113 bool rubberBanding;
114 Qt::ItemSelectionMode rubberBandSelectionMode;
115 Qt::ItemSelectionOperation rubberBandSelectionOperation;
116#endif
117 int handScrollMotions;
118
119 QGraphicsView::CacheMode cacheMode;
120
121 QList<QStyleOptionGraphicsItem> styleOptions;
122 QStyleOptionGraphicsItem *allocStyleOptionsArray(int numItems);
123 void freeStyleOptionsArray(QStyleOptionGraphicsItem *array);
124
125 QBrush backgroundBrush;
126 QBrush foregroundBrush;
127 QPixmap backgroundPixmap;
128 QRegion backgroundPixmapExposed;
129
130#ifndef QT_NO_CURSOR
131 QCursor originalCursor;
132 bool hasStoredOriginalCursor;
133 void _q_setViewportCursor(const QCursor &cursor);
134 void _q_unsetViewportCursor();
135#endif
136
137 QGraphicsSceneDragDropEvent *lastDragDropEvent;
138 void storeDragDropEvent(const QGraphicsSceneDragDropEvent *event);
139 void populateSceneDragDropEvent(QGraphicsSceneDragDropEvent *dest,
140 QDropEvent *source);
141
142 QTransform mapToViewTransform(const QGraphicsItem *item) const;
143 QRect mapToViewRect(const QGraphicsItem *item, const QRectF &rect) const;
144 QRegion mapToViewRegion(const QGraphicsItem *item, const QRectF &rect) const;
145 QRegion dirtyRegion;
146 QRect dirtyBoundingRect;
147 void processPendingUpdates();
148 inline void updateAll()
149 {
150 viewport->update();
151 fullUpdatePending = true;
152 dirtyBoundingRect = QRect();
153 dirtyRegion = QRegion();
154 }
155
156 inline void dispatchPendingUpdateRequests()
157 {
158 if (qt_widget_private(widget: viewport)->shouldPaintOnScreen())
159 QCoreApplication::sendPostedEvents(receiver: viewport, event_type: QEvent::UpdateRequest);
160 else
161 QCoreApplication::sendPostedEvents(receiver: viewport->window(), event_type: QEvent::UpdateRequest);
162 }
163
164 void setUpdateClip(QGraphicsItem *);
165
166 inline bool updateRectF(const QRectF &rect)
167 {
168 if (rect.isEmpty())
169 return false;
170 if (optimizationFlags & QGraphicsView::DontAdjustForAntialiasing)
171 return updateRect(rect: rect.toAlignedRect().adjusted(xp1: -1, yp1: -1, xp2: 1, yp2: 1));
172 return updateRect(rect: rect.toAlignedRect().adjusted(xp1: -2, yp1: -2, xp2: 2, yp2: 2));
173 }
174
175 bool updateRect(const QRect &rect);
176 bool updateRegion(const QRectF &rect, const QTransform &xform);
177 bool updateSceneSlotReimplementedChecked;
178 QRegion exposedRegion;
179
180 QList<QGraphicsItem *> findItems(const QRegion &exposedRegion, bool *allItems,
181 const QTransform &viewTransform) const;
182
183 QPointF mapToScene(const QPointF &point) const;
184 QRectF mapToScene(const QRectF &rect) const;
185 static void translateTouchEvent(QGraphicsViewPrivate *d, QTouchEvent *touchEvent);
186 void updateInputMethodSensitivity();
187};
188
189QT_END_NAMESPACE
190
191#endif
192

source code of qtbase/src/widgets/graphicsview/qgraphicsview_p.h