QGraphicsView

分類：IT技術 時間:2016-10-19

QGraphicsView Class

The QGraphicsView class provides a widget for displaying the contents of a QGraphicsScene. More...

Header: #include <QGraphicsView>
qmake: QT += widgets
Since: Qt 4.2
Inherits: QAbstractScrollArea
Inherited By:

QChartView
  • List of all members, including inherited members
  • Obsolete members

Public Types

flags CacheMode
enum CacheModeFlag { CacheNone, CacheBackground }
enum DragMode { NoDrag, ScrollHandDrag, RubberBandDrag }
enum OptimizationFlag { DontClipPainter, DontSavePainterState, DontAdjustForAntialiasing, IndirectPainting }
flags OptimizationFlags
enum ViewportAnchor { NoAnchor, AnchorViewCenter, AnchorUnderMouse }
enum ViewportupdateMode { FullViewportUpdate, MinimalViewportUpdate, SmartViewportUpdate, BoundingRectViewportUpdate, NoViewportUpdate }

Properties

  • alignment : Qt::Alignment
  • backgroundBrush : QBrush
  • cacheMode : CacheMode
  • dragMode : DragMode
  • foregroundBrush : QBrush
  • interactive : bool
  • optimizationFlags : OptimizationFlags
  • renderHints : QPainter::RenderHints
  • resizeAnchor : ViewportAnchor
  • rubberBandSelectionMode : Qt::ItemSelectionMode
  • sceneRect : QRectF
  • transformationAnchor : ViewportAnchor
  • viewportUpdateMode : ViewportUpdateMode
  • 3 properties inherited from QAbstractScrollArea
  • 6 properties inherited from QFrame
  • 58 properties inherited from QWidget
  • 1 property inherited from QObject

Public Functions

  QGraphicsView(QWidget *parent = Q_NULLPTR)
  QGraphicsView(QGraphicsScene *scene, QWidget *parent = Q_NULLPTR)
  ~QGraphicsView()
Qt::Alignment alignment() const
QBrush backgroundBrush() const
CacheMode cacheMode() const
void centerOn(const QPointF &pos)
void centerOn(qreal x, qreal y)
void centerOn(const QGraphicsItem *item)
DragMode dragMode() const
void ensureVisible(const QRectF &rect, int xmargin = 50, int ymargin = 50)
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 aspectRatioMode = Qt::IgnoreAspectRatio)
void fitInView(qreal x, qreal y, qreal w, qreal h, Qt::AspectRatioMode aspectRatioMode = Qt::IgnoreAspectRatio)
void fitInView(const QGraphicsItem *item, Qt::AspectRatioMode aspectRatioMode = Qt::IgnoreAspectRatio)
QBrush foregroundBrush() const
bool isInteractive() const
bool isTransformed() const
QGraphicsItem * itemAt(const QPoint &pos) const
QGraphicsItem * itemAt(int x, int y) const
QList<QGraphicsItem *> items() const
QList<QGraphicsItem *> items(const QPoint &pos) const
QList<QGraphicsItem *> items(int x, int y) const
QList<QGraphicsItem *> items(const QRect &rect, Qt::ItemSelectionMode mode = Qt::IntersectsItemShape) const
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
QPoint mapFromScene(const QPointF &point) const
QPolygon mapFromScene(const QRectF &rect) const
QPolygon mapFromScene(const QPolygonF &polygon) const
QPainterPath mapFromScene(const QPainterPath &path) const
QPoint mapFromScene(qreal x, qreal y) const
QPolygon mapFromScene(qreal x, qreal y, qreal w, qreal h) 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
QPointF mapToScene(int x, int y) const
QPolygonF mapToScene(int x, int y, int w, int h) const
QMatrix matrix() const
OptimizationFlags optimizationFlags() const
void render(QPainter *painter, const QRectF &target = QRectF(), const QRect &source = QRect(), Qt::AspectRatioMode aspectRatioMode = Qt::KeepAspectRatio)
QPainter::RenderHints renderHints() const
void resetCachedContent()
void resetMatrix()
void resetTransform()
ViewportAnchor resizeAnchor() const
void rotate(qreal angle)
QRect rubberBandRect() const
Qt::ItemSelectionMode rubberBandSelectionMode() const
void scale(qreal sx, qreal sy)
QGraphicsScene * scene() const
QRectF sceneRect() const
void setAlignment(Qt::Alignment alignment)
void setBackgroundBrush(const QBrush &brush)
void setCacheMode(CacheMode mode)
void setDragMode(DragMode mode)
void setForegroundBrush(const QBrush &brush)
void setInteractive(bool allowed)
void setMatrix(const QMatrix &matrix, bool combine = false)
void setOptimizationFlag(OptimizationFlag flag, bool enabled = true)
void setOptimizationFlags(OptimizationFlags flags)
void setRenderHint(QPainter::RenderHint hint, bool enabled = true)
void setRenderHints(QPainter::RenderHints hints)
void setResizeAnchor(ViewportAnchor anchor)
void setRubberBandSelectionMode(Qt::ItemSelectionMode mode)
void setScene(QGraphicsScene *scene)
void setSceneRect(const QRectF &rect)
void setSceneRect(qreal x, qreal y, qreal w, qreal h)
void setTransform(const QTransform &matrix, bool combine = false)
void setTransformationAnchor(ViewportAnchor anchor)
void setViewportUpdateMode(ViewportUpdateMode mode)
void shear(qreal sh, qreal sv)
QTransform transform() const
ViewportAnchor transformationAnchor() const
void translate(qreal dx, qreal dy)
QTransform viewportTransform() const
ViewportUpdateMode viewportUpdateMode() const

Reimplemented Public Functions

virtual QVariant inputMethodQuery(Qt::InputMethodQuery query) const
virtual QSize sizeHint() const
  • 20 public functions inherited from QAbstractScrollArea
  • 14 public functions inherited from QFrame
  • 211 public functions inherited from QWidget
  • 31 public functions inherited from QObject
  • 14 public functions inherited from QPaintDevice

Public Slots

void invalidateScene(const QRectF &rect = QRectF(), QGraphicsScene::SceneLayers layers = QGraphicsScene::AllLayers)
void updateScene(const QList<QRectF> &rects)
void updateSceneRect(const QRectF &rect)
  • 19 public slots inherited from QWidget
  • 1 public slot inherited from QObject

Signals

void rubberBandChanged(QRect rubberBandRect, QPointF fromScenePoint, QPointF toScenePoint)
  • 3 signals inherited from QWidget
  • 2 signals inherited from QObject

Protected Functions

virtual void drawBackground(QPainter *painter, const QRectF &rect)
virtual void drawForeground(QPainter *painter, const QRectF &rect)

Reimplemented Protected Functions

virtual void contextMenuEvent(QContextMenuEvent *event)
virtual void dragEnterEvent(QDragEnterEvent *event)
virtual void dragLeaveEvent(QDragLeaveEvent *event)
virtual void dragMoveEvent(QDragMoveEvent *event)
virtual void dropEvent(QDropEvent *event)
virtual bool event(QEvent *event)
virtual void focusInEvent(QFocusEvent *event)
virtual bool focusNextPrevChild(bool next)
virtual void focusOutEvent(QFocusEvent *event)
virtual void inputMethodEvent(QInputMethodEvent *event)
virtual void keyPressEvent(QKeyEvent *event)
virtual void keyReleaseEvent(QKeyEvent *event)
virtual void mouseDoubleClickEvent(QMouseEvent *event)
virtual void mouseMoveEvent(QMouseEvent *event)
virtual void mousePressEvent(QMouseEvent *event)
virtual void mouseReleaseEvent(QMouseEvent *event)
virtual void paintEvent(QPaintEvent *event)
virtual void resizeEvent(QResizeEvent *event)
virtual void scrollContentsBy(int dx, int dy)
virtual void showEvent(QShowEvent *event)
virtual bool viewportEvent(QEvent *event)
virtual void wheelEvent(QWheelEvent *event)
  • 20 protected functions inherited from QAbstractScrollArea
  • 4 protected functions inherited from QFrame
  • 35 protected functions inherited from QWidget
  • 9 protected functions inherited from QObject
  • 1 protected function inherited from QPaintDevice

Protected Slots

virtual void setupViewport(QWidget *widget)
  • 1 protected slot inherited from QWidget

Additional Inherited Members

  • 5 static public members inherited from QWidget
  • 11 static public members inherited from QObject

Tags: displaying including inherited contents provides

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