28#include <QGestureEvent>
31 : QGraphicsView( parent )
33 setObjectName( QStringLiteral(
"PlotCanvas" ) );
34 mScene =
new QGraphicsScene(
this );
37 setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
38 setVerticalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
39 setMouseTracking(
true );
40 viewport()->setMouseTracking(
true );
42 setFocusPolicy( Qt::StrongFocus );
44 setRenderHints( QPainter::Antialiasing );
73 qDeleteAll( mScene->items() );
75 mScene->deleteLater();
95 mTool->populateContextMenuWithEvent( &menu,
event );
100 if ( !menu.isEmpty() )
101 menu.exec(
event->globalPos() );
108 mTool->keyPressEvent(
event );
110 if ( mTool &&
event->isAccepted() )
113 if (
event->key() == Qt::Key_Space && !
event->isAutoRepeat() )
115 if ( !(
event->modifiers() & Qt::ControlModifier ) )
133 mTool->keyReleaseEvent(
event );
136 if ( !mTool || !
event->isAccepted() )
137 QGraphicsView::keyReleaseEvent(
event );
145 mTool->plotDoubleClickEvent( me.get() );
146 event->setAccepted( me->isAccepted() );
149 if ( !mTool || !
event->isAccepted() )
150 QGraphicsView::mouseDoubleClickEvent(
event );
158 mTool->plotPressEvent( me.get() );
159 event->setAccepted( me->isAccepted() );
162 if ( !mTool || !
event->isAccepted() )
164 if (
event->button() == Qt::MiddleButton )
167 setTool( mMidMouseButtonPanTool );
173 showContextMenu( me.get() );
179 QGraphicsView::mousePressEvent(
event );
189 mTool->plotReleaseEvent( me.get() );
190 event->setAccepted( me->isAccepted() );
193 if ( !mTool || !
event->isAccepted() )
194 QGraphicsView::mouseReleaseEvent(
event );
199 QGraphicsView::resizeEvent( e );
206 mTool->wheelEvent(
event );
209 if ( !mTool || !
event->isAccepted() )
221 mTool->plotMoveEvent( me.get() );
222 event->setAccepted( me->isAccepted() );
225 if ( !mTool || !
event->isAccepted() )
226 QGraphicsView::mouseMoveEvent(
event );
249 if ( mTool && mTool ==
tool )
253 setCursor( Qt::ArrowCursor );
304 if (
event->type() == QEvent::ToolTip && mTool && mTool->canvasToolTipEvent( qgis::down_cast<QHelpEvent *>(
event ) ) )
308 return QGraphicsView::viewportEvent(
event );
318 if ( e->type() == QEvent::Gesture )
323 return mTool->gestureEvent(
static_cast<QGestureEvent *
>( e ) );
328 return QGraphicsView::event( e );
@ ShowContextMenu
Show a context menu when right-clicking with the tool.
This class represents a coordinate reference system (CRS).
bool event(QEvent *e) override
void setTool(QgsPlotTool *tool)
Sets the interactive tool currently being used on the canvas.
virtual void cancelJobs()
Cancel any rendering job, in a blocking way.
QgsPlotCanvas(QWidget *parent=nullptr)
Constructor for QgsPlotCanvas, with the specified parent widget.
virtual void refresh()
Updates and redraws the plot.
virtual void zoomToRect(const QRectF &rect)
Zooms the plot to the specified rect in canvas units.
void keyPressEvent(QKeyEvent *e) override
virtual void panContentsBy(double dx, double dy)
Pans the plot contents by dx, dy in canvas units.
void mousePressEvent(QMouseEvent *e) override
void toolChanged(QgsPlotTool *newTool)
Emitted when the plot tool is changed.
virtual QgsPointXY toCanvasCoordinates(const QgsPoint &point) const
Converts a point in map coordinates to the associated canvas point.
~QgsPlotCanvas() override
void keyReleaseEvent(QKeyEvent *e) override
QgsPlotTool * tool()
Returns the currently active tool.
void mouseDoubleClickEvent(QMouseEvent *e) override
void contextMenuAboutToShow(QMenu *menu, QgsPlotMouseEvent *event)
Emitted before the canvas context menu will be shown.
void mouseReleaseEvent(QMouseEvent *e) override
void unsetTool(QgsPlotTool *tool)
Unset the current tool.
void wheelEvent(QWheelEvent *e) override
void mouseMoveEvent(QMouseEvent *e) override
void resizeEvent(QResizeEvent *e) override
void willBeDeleted()
Emitted in the destructor when the canvas is about to be deleted, but is still in a perfectly valid s...
virtual void scalePlot(double factor)
Scales the plot by a specified scale factor.
virtual QgsCoordinateReferenceSystem crs() const
Returns the coordinate reference system (CRS) for map coordinates used by the canvas.
virtual void wheelZoom(QWheelEvent *event)
Zoom plot from a mouse wheel event.
virtual QgsPoint toMapCoordinates(const QgsPointXY &point) const
Converts a point on the canvas to the associated map coordinate.
bool viewportEvent(QEvent *event) override
virtual QgsPointXY snapToPlot(QPoint point)
Snap a canvas point to the plot.
virtual void centerPlotOn(double x, double y)
Centers the plot on the plot point corresponding to x, y in canvas units.
A QgsPlotMouseEvent is the result of a user interaction with the mouse on a QgsPlotCanvas.
A class to represent a 2D point.
Point geometry type, with support for z-dimension and m-values.