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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QGRAPHICSVIEW_H
#define QGRAPHICSVIEW_H
#include <QtWidgets/qtwidgetsglobal.h>
#include <QtCore/qmetatype.h>
#include <QtGui/qpainter.h>
#include <QtWidgets/qscrollarea.h>
#include <QtWidgets/qgraphicsscene.h>
QT_REQUIRE_CONFIG(graphicsview);
QT_BEGIN_NAMESPACE
class QGraphicsItem;
class QPainterPath;
class QPolygonF;
class QStyleOptionGraphicsItem;
class QGraphicsViewPrivate;
class Q_WIDGETS_EXPORT QGraphicsView : public QAbstractScrollArea
{
Q_OBJECT
Q_FLAGS(QPainter::RenderHints CacheMode OptimizationFlags)
Q_PROPERTY(QBrush backgroundBrush READ backgroundBrush WRITE setBackgroundBrush)
Q_PROPERTY(QBrush foregroundBrush READ foregroundBrush WRITE setForegroundBrush)
Q_PROPERTY(bool interactive READ isInteractive WRITE setInteractive)
Q_PROPERTY(QRectF sceneRect READ sceneRect WRITE setSceneRect)
Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment)
Q_PROPERTY(QPainter::RenderHints renderHints READ renderHints WRITE setRenderHints)
Q_PROPERTY(DragMode dragMode READ dragMode WRITE setDragMode)
Q_PROPERTY(CacheMode cacheMode READ cacheMode WRITE setCacheMode)
Q_PROPERTY(ViewportAnchor transformationAnchor READ transformationAnchor
WRITE setTransformationAnchor)
Q_PROPERTY(ViewportAnchor resizeAnchor READ resizeAnchor WRITE setResizeAnchor)
Q_PROPERTY(ViewportUpdateMode viewportUpdateMode READ viewportUpdateMode
WRITE setViewportUpdateMode)
#if QT_CONFIG(rubberband)
Q_PROPERTY(Qt::ItemSelectionMode rubberBandSelectionMode READ rubberBandSelectionMode
WRITE setRubberBandSelectionMode)
#endif
Q_PROPERTY(OptimizationFlags optimizationFlags READ optimizationFlags
WRITE setOptimizationFlags)
public:
enum ViewportAnchor {
NoAnchor,
AnchorViewCenter,
AnchorUnderMouse
};
Q_ENUM(ViewportAnchor)
enum CacheModeFlag {
CacheNone = 0x0,
CacheBackground = 0x1
};
Q_DECLARE_FLAGS(CacheMode, CacheModeFlag)
enum DragMode {
NoDrag,
ScrollHandDrag,
RubberBandDrag
};
Q_ENUM(DragMode)
enum ViewportUpdateMode {
FullViewportUpdate,
MinimalViewportUpdate,
SmartViewportUpdate,
NoViewportUpdate,
BoundingRectViewportUpdate
};
Q_ENUM(ViewportUpdateMode)
enum OptimizationFlag {
DontSavePainterState = 0x1,
DontAdjustForAntialiasing = 0x2,
IndirectPainting = 0x4
};
Q_DECLARE_FLAGS(OptimizationFlags, OptimizationFlag)
QGraphicsView(QWidget *parent = nullptr);
QGraphicsView(QGraphicsScene *scene, QWidget *parent = nullptr);
~QGraphicsView();
QSize sizeHint() const override;
QPainter::RenderHints renderHints() const;
void setRenderHint(QPainter::RenderHint hint, bool enabled = true);
void setRenderHints(QPainter::RenderHints hints);
Qt::Alignment alignment() const;
void setAlignment(Qt::Alignment alignment);
ViewportAnchor transformationAnchor() const;
void setTransformationAnchor(ViewportAnchor anchor);
ViewportAnchor resizeAnchor() const;
void setResizeAnchor(ViewportAnchor anchor);
ViewportUpdateMode viewportUpdateMode() const;
void setViewportUpdateMode(ViewportUpdateMode mode);
OptimizationFlags optimizationFlags() const;
void setOptimizationFlag(OptimizationFlag flag, bool enabled = true);
void setOptimizationFlags(OptimizationFlags flags);
DragMode dragMode() const;
void setDragMode(DragMode mode);
#if QT_CONFIG(rubberband)
Qt::ItemSelectionMode rubberBandSelectionMode() const;
void setRubberBandSelectionMode(Qt::ItemSelectionMode mode);
QRect rubberBandRect() const;
#endif
CacheMode cacheMode() const;
void setCacheMode(CacheMode mode);
void resetCachedContent();
bool isInteractive() const;
void setInteractive(bool allowed);
QGraphicsScene *scene() const;
void setScene(QGraphicsScene *scene);
QRectF sceneRect() const;
void setSceneRect(const QRectF &rect);
inline void setSceneRect(qreal x, qreal y, qreal w, qreal h);
QTransform transform() const;
QTransform viewportTransform() const;
bool isTransformed() const;
void setTransform(const QTransform &matrix, bool combine = false);
void resetTransform();
void rotate(qreal angle);
void scale(qreal sx, qreal sy);
void shear(qreal sh, qreal sv);
void translate(qreal dx, qreal dy);
void centerOn(const QPointF &pos);
inline void centerOn(qreal x, qreal y);
void centerOn(const QGraphicsItem *item);
void ensureVisible(const QRectF &rect, int xmargin = 50, int ymargin = 50);
inline void ensureVisible(qreal x, qreal y, qreal w, qreal h, int xmargin = 50, int ymargin = 50);
void ensureVisible(const QGraphicsItem *item, int xmargin = 50, int ymargin = 50);
void fitInView(const QRectF &rect, Qt::AspectRatioMode aspectRadioMode = Qt::IgnoreAspectRatio);
inline void fitInView(qreal x, qreal y, qreal w, qreal h,
Qt::AspectRatioMode aspectRadioMode = Qt::IgnoreAspectRatio);
void fitInView(const QGraphicsItem *item,
Qt::AspectRatioMode aspectRadioMode = Qt::IgnoreAspectRatio);
void render(QPainter *painter, const QRectF &target = QRectF(), const QRect &source = QRect(),
Qt::AspectRatioMode aspectRatioMode = Qt::KeepAspectRatio);
QList<QGraphicsItem *> items() const;
QList<QGraphicsItem *> items(const QPoint &pos) const;
inline QList<QGraphicsItem *> items(int x, int y) const;
QList<QGraphicsItem *> items(const QRect &rect, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
inline QList<QGraphicsItem *> items(int x, int y, int w, int h, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
QList<QGraphicsItem *> items(const QPolygon &polygon, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const;
QGraphicsItem *itemAt(const QPoint &pos) const;
inline QGraphicsItem *itemAt(int x, int y) const;
QPointF mapToScene(const QPoint &point) const;
QPolygonF mapToScene(const QRect &rect) const;
QPolygonF mapToScene(const QPolygon &polygon) const;
QPainterPath mapToScene(const QPainterPath &path) const;
QPoint mapFromScene(const QPointF &point) const;
QPolygon mapFromScene(const QRectF &rect) const;
QPolygon mapFromScene(const QPolygonF &polygon) const;
QPainterPath mapFromScene(const QPainterPath &path) const;
inline QPointF mapToScene(int x, int y) const;
inline QPolygonF mapToScene(int x, int y, int w, int h) const;
inline QPoint mapFromScene(qreal x, qreal y) const;
inline QPolygon mapFromScene(qreal x, qreal y, qreal w, qreal h) const;
QVariant inputMethodQuery(Qt::InputMethodQuery query) const override;
QBrush backgroundBrush() const;
void setBackgroundBrush(const QBrush &brush);
QBrush foregroundBrush() const;
void setForegroundBrush(const QBrush &brush);
public Q_SLOTS:
void updateScene(const QList<QRectF> &rects);
void invalidateScene(const QRectF &rect = QRectF(), QGraphicsScene::SceneLayers layers = QGraphicsScene::AllLayers);
void updateSceneRect(const QRectF &rect);
#if QT_CONFIG(rubberband)
Q_SIGNALS:
void rubberBandChanged(QRect viewportRect, QPointF fromScenePoint, QPointF toScenePoint);
#endif
protected Q_SLOTS:
void setupViewport(QWidget *widget) override;
protected:
QGraphicsView(QGraphicsViewPrivate &, QWidget *parent = nullptr);
bool event(QEvent *event) override;
bool viewportEvent(QEvent *event) override;
#ifndef QT_NO_CONTEXTMENU
void contextMenuEvent(QContextMenuEvent *event) override;
#endif
#if QT_CONFIG(draganddrop)
void dragEnterEvent(QDragEnterEvent *event) override;
void dragLeaveEvent(QDragLeaveEvent *event) override;
void dragMoveEvent(QDragMoveEvent *event) override;
void dropEvent(QDropEvent *event) override;
#endif
void focusInEvent(QFocusEvent *event) override;
bool focusNextPrevChild(bool next) override;
void focusOutEvent(QFocusEvent *event) override;
void keyPressEvent(QKeyEvent *event) override;
void keyReleaseEvent(QKeyEvent *event) override;
void mouseDoubleClickEvent(QMouseEvent *event) override;
void mousePressEvent(QMouseEvent *event) override;
void mouseMoveEvent(QMouseEvent *event) override;
void mouseReleaseEvent(QMouseEvent *event) override;
#if QT_CONFIG(wheelevent)
void wheelEvent(QWheelEvent *event) override;
#endif
void paintEvent(QPaintEvent *event) override;
void resizeEvent(QResizeEvent *event) override;
void scrollContentsBy(int dx, int dy) override;
void showEvent(QShowEvent *event) override;
void inputMethodEvent(QInputMethodEvent *event) override;
virtual void drawBackground(QPainter *painter, const QRectF &rect);
virtual void drawForeground(QPainter *painter, const QRectF &rect);
virtual void drawItems(QPainter *painter, int numItems,
QGraphicsItem *items[],
const QStyleOptionGraphicsItem options[]);
private:
Q_DECLARE_PRIVATE(QGraphicsView)
Q_DISABLE_COPY(QGraphicsView)
#ifndef QT_NO_CURSOR
Q_PRIVATE_SLOT(d_func(), void _q_setViewportCursor(const QCursor &))
Q_PRIVATE_SLOT(d_func(), void _q_unsetViewportCursor())
#endif
friend class QGraphicsSceneWidget;
friend class QGraphicsScene;
friend class QGraphicsScenePrivate;
friend class QGraphicsItemPrivate;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QGraphicsView::CacheMode)
Q_DECLARE_OPERATORS_FOR_FLAGS(QGraphicsView::OptimizationFlags)
inline void QGraphicsView::setSceneRect(qreal ax, qreal ay, qreal aw, qreal ah)
{ setSceneRect(QRectF(ax, ay, aw, ah)); }
inline void QGraphicsView::centerOn(qreal ax, qreal ay)
{ centerOn(QPointF(ax, ay)); }
inline void QGraphicsView::ensureVisible(qreal ax, qreal ay, qreal aw, qreal ah, int xmargin, int ymargin)
{ ensureVisible(QRectF(ax, ay, aw, ah), xmargin, ymargin); }
inline void QGraphicsView::fitInView(qreal ax, qreal ay, qreal w, qreal h, Qt::AspectRatioMode mode)
{ fitInView(QRectF(ax, ay, w, h), mode); }
inline QList<QGraphicsItem *> QGraphicsView::items(int ax, int ay) const
{ return items(QPoint(ax, ay)); }
inline QList<QGraphicsItem *> QGraphicsView::items(int ax, int ay, int w, int h, Qt::ItemSelectionMode mode) const
{ return items(QRect(ax, ay, w, h), mode); }
inline QGraphicsItem *QGraphicsView::itemAt(int ax, int ay) const
{ return itemAt(QPoint(ax, ay)); }
inline QPointF QGraphicsView::mapToScene(int ax, int ay) const
{ return mapToScene(QPoint(ax, ay)); }
inline QPolygonF QGraphicsView::mapToScene(int ax, int ay, int w, int h) const
{ return mapToScene(QRect(ax, ay, w, h)); }
inline QPoint QGraphicsView::mapFromScene(qreal ax, qreal ay) const
{ return mapFromScene(QPointF(ax, ay)); }
inline QPolygon QGraphicsView::mapFromScene(qreal ax, qreal ay, qreal w, qreal h) const
{ return mapFromScene(QRectF(ax, ay, w, h)); }
QT_END_NAMESPACE
#endif // QGRAPHICSVIEW_H
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