1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtWidgets module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QGRAPHICSVIEW_P_H 41 #define QGRAPHICSVIEW_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists for the convenience 48 // of other Qt classes. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtWidgets/private/qtwidgetsglobal_p.h> 55 #include "qgraphicsview.h" 56 57 #include <QtGui/qevent.h> 58 #include <QtCore/qcoreapplication.h> 59 #include "qgraphicssceneevent.h" 60 #include <QtWidgets/qstyleoption.h> 61 #include <private/qabstractscrollarea_p.h> 62 #include <private/qapplication_p.h> 63 64 QT_REQUIRE_CONFIG(graphicsview); 65 66 QT_BEGIN_NAMESPACE 67 68 class Q_WIDGETS_EXPORT QGraphicsViewPrivate : public QAbstractScrollAreaPrivate 69 { 70 Q_DECLARE_PUBLIC(QGraphicsView) 71 public: 72 QGraphicsViewPrivate(); 73 ~QGraphicsViewPrivate(); 74 75 void recalculateContentSize(); 76 void centerView(QGraphicsView::ViewportAnchor anchor); 77 78 QPainter::RenderHints renderHints; 79 80 QGraphicsView::DragMode dragMode; 81 82 quint32 sceneInteractionAllowed : 1; 83 quint32 hasSceneRect : 1; 84 quint32 connectedToScene : 1; 85 quint32 useLastMouseEvent : 1; 86 quint32 identityMatrix : 1; 87 quint32 dirtyScroll : 1; 88 quint32 accelerateScrolling : 1; 89 quint32 keepLastCenterPoint : 1; 90 quint32 transforming : 1; 91 quint32 handScrolling : 1; 92 quint32 mustAllocateStyleOptions : 1; 93 quint32 mustResizeBackgroundPixmap : 1; 94 quint32 fullUpdatePending : 1; 95 quint32 hasUpdateClip : 1; 96 quint32 padding : 18; 97 98 QRectF sceneRect; 99 void updateLastCenterPoint(); 100 101 qint64 horizontalScroll() const; 102 qint64 verticalScroll() const; 103 104 QRectF mapRectToScene(const QRect &rect) const; 105 QRectF mapRectFromScene(const QRectF &rect) const; 106 107 QRect updateClip; 108 QPointF mousePressItemPoint; 109 QPointF mousePressScenePoint; 110 QPoint mousePressViewPoint; 111 QPoint mousePressScreenPoint; 112 QPointF lastMouseMoveScenePoint; 113 QPointF lastRubberbandScenePoint; 114 QPoint lastMouseMoveScreenPoint; 115 QPoint dirtyScrollOffset; 116 Qt::MouseButton mousePressButton; 117 QTransform matrix; 118 qint64 scrollX, scrollY; 119 void updateScroll(); 120 121 qreal leftIndent; 122 qreal topIndent; 123 124 // Replaying mouse events 125 QMouseEvent lastMouseEvent; 126 void replayLastMouseEvent(); 127 void storeMouseEvent(QMouseEvent *event); 128 void mouseMoveEventHandler(QMouseEvent *event); 129 130 QPointF lastCenterPoint; 131 Qt::Alignment alignment; 132 133 QGraphicsView::ViewportAnchor transformationAnchor; 134 QGraphicsView::ViewportAnchor resizeAnchor; 135 QGraphicsView::ViewportUpdateMode viewportUpdateMode; 136 QGraphicsView::OptimizationFlags optimizationFlags; 137 138 QPointer<QGraphicsScene> scene; 139 #if QT_CONFIG(rubberband) 140 QRect rubberBandRect; 141 QRegion rubberBandRegion(const QWidget *widget, const QRect &rect) const; 142 void updateRubberBand(const QMouseEvent *event); 143 void clearRubberBand(); 144 bool rubberBanding; 145 Qt::ItemSelectionMode rubberBandSelectionMode; 146 Qt::ItemSelectionOperation rubberBandSelectionOperation; 147 #endif 148 int handScrollMotions; 149 150 QGraphicsView::CacheMode cacheMode; 151 152 QVector<QStyleOptionGraphicsItem> styleOptions; 153 QStyleOptionGraphicsItem *allocStyleOptionsArray(int numItems); 154 void freeStyleOptionsArray(QStyleOptionGraphicsItem *array); 155 156 QBrush backgroundBrush; 157 QBrush foregroundBrush; 158 QPixmap backgroundPixmap; 159 QRegion backgroundPixmapExposed; 160 161 #ifndef QT_NO_CURSOR 162 QCursor originalCursor; 163 bool hasStoredOriginalCursor; 164 void _q_setViewportCursor(const QCursor &cursor); 165 void _q_unsetViewportCursor(); 166 #endif 167 168 QGraphicsSceneDragDropEvent *lastDragDropEvent; 169 void storeDragDropEvent(const QGraphicsSceneDragDropEvent *event); 170 void populateSceneDragDropEvent(QGraphicsSceneDragDropEvent *dest, 171 QDropEvent *source); 172 173 QRect mapToViewRect(const QGraphicsItem *item, const QRectF &rect) const; 174 QRegion mapToViewRegion(const QGraphicsItem *item, const QRectF &rect) const; 175 QRegion dirtyRegion; 176 QRect dirtyBoundingRect; 177 void processPendingUpdates(); updateAll()178 inline void updateAll() 179 { 180 viewport->update(); 181 fullUpdatePending = true; 182 dirtyBoundingRect = QRect(); 183 dirtyRegion = QRegion(); 184 } 185 dispatchPendingUpdateRequests()186 inline void dispatchPendingUpdateRequests() 187 { 188 if (qt_widget_private(viewport)->shouldPaintOnScreen()) 189 QCoreApplication::sendPostedEvents(viewport, QEvent::UpdateRequest); 190 else 191 QCoreApplication::sendPostedEvents(viewport->window(), QEvent::UpdateRequest); 192 } 193 194 void setUpdateClip(QGraphicsItem *); 195 updateRectF(const QRectF & rect)196 inline bool updateRectF(const QRectF &rect) 197 { 198 if (rect.isEmpty()) 199 return false; 200 if (optimizationFlags & QGraphicsView::DontAdjustForAntialiasing) 201 return updateRect(rect.toAlignedRect().adjusted(-1, -1, 1, 1)); 202 return updateRect(rect.toAlignedRect().adjusted(-2, -2, 2, 2)); 203 } 204 205 bool updateRect(const QRect &rect); 206 bool updateRegion(const QRectF &rect, const QTransform &xform); 207 bool updateSceneSlotReimplementedChecked; 208 QRegion exposedRegion; 209 210 QList<QGraphicsItem *> findItems(const QRegion &exposedRegion, bool *allItems, 211 const QTransform &viewTransform) const; 212 213 QPointF mapToScene(const QPointF &point) const; 214 QRectF mapToScene(const QRectF &rect) const; 215 static void translateTouchEvent(QGraphicsViewPrivate *d, QTouchEvent *touchEvent); 216 void updateInputMethodSensitivity(); 217 }; 218 219 QT_END_NAMESPACE 220 221 #endif 222