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25ed76b86e
Another bit to make core library independent from QgsProject::instance(). Until now labeling engine configuration was taken from project singleton. Removed legacy methods from QgsPalLabeling - the class now does not have any more member variables/methods, it is just a bunch of helper functions. (PR #4384)
275 lines
9.5 KiB
Plaintext
275 lines
9.5 KiB
Plaintext
/** \ingroup gui
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* Map canvas is a class for displaying all GIS data types on a canvas.
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*/
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class QgsMapCanvas : QGraphicsView
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{
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%TypeHeaderCode
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#include <qgsmapcanvas.h>
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%End
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%ConvertToSubClassCode
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if (dynamic_cast<QgsMapCanvas*>(sipCpp) != NULL)
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sipType = sipType_QgsMapCanvas;
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else
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sipType = NULL;
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%End
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public:
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//! Constructor
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QgsMapCanvas( QWidget *parent /TransferThis/ = 0 );
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~QgsMapCanvas();
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double magnificationFactor() const;
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void setLayers( const QList<QgsMapLayer *> &layers );
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void setCurrentLayer( QgsMapLayer *layer );
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const QgsMapSettings &mapSettings() const /KeepReference/;
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void setDestinationCrs( const QgsCoordinateReferenceSystem &crs );
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void setMapSettingsFlags( QgsMapSettings::Flags flags );
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const QgsLabelingResults *labelingResults() const;
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void setCachingEnabled( bool enabled );
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bool isCachingEnabled() const;
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void clearCache();
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void refreshAllLayers();
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void waitWhileRendering();
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void setParallelRenderingEnabled( bool enabled );
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bool isParallelRenderingEnabled() const;
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void setMapUpdateInterval( int timeMilliseconds );
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int mapUpdateInterval() const;
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double scale();
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double mapUnitsPerPixel() const;
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QgsRectangle extent() const;
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QgsRectangle fullExtent() const;
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void setExtent( const QgsRectangle &r, bool magnified = false );
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double rotation() const;
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void setRotation( double degrees );
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void setCenter( const QgsPoint ¢er );
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QgsPoint center() const;
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void zoomToFullExtent();
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void zoomToPreviousExtent();
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void zoomToNextExtent();
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void clearExtentHistory();
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void zoomToSelected( QgsVectorLayer *layer = 0 );
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void zoomToFeatureIds( QgsVectorLayer *layer, const QgsFeatureIds &ids );
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void panToFeatureIds( QgsVectorLayer *layer, const QgsFeatureIds &ids );
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void panToSelected( QgsVectorLayer *layer = 0 );
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void setMapTool( QgsMapTool *mapTool );
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void unsetMapTool( QgsMapTool *mapTool );
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QgsMapTool *mapTool();
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void setCanvasColor( const QColor &_newVal );
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QColor canvasColor() const;
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void setSelectionColor( const QColor &color );
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void updateScale();
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QgsMapLayer *layer( int index );
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int layerCount() const;
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QList<QgsMapLayer *> layers() const;
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void freeze( bool frozen = true );
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bool isFrozen() const;
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bool renderFlag() const;
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QgsUnitTypes::DistanceUnit mapUnits() const;
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QMap<QString, QString> layerStyleOverrides() const;
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void setLayerStyleOverrides( const QMap<QString, QString> &overrides );
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void setTheme( const QString &theme );
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QString theme() const;
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const QgsMapToPixel *getCoordinateTransform();
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bool isDrawing();
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QgsMapLayer *currentLayer();
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void setWheelFactor( double factor );
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void zoomScale( double scale );
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void zoomByFactor( double scaleFactor, const QgsPoint *center = 0 );
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void zoomWithCenter( int x, int y, bool zoomIn );
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void zoomToFeatureExtent( QgsRectangle &rect );
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bool scaleLocked() const;
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void enableAntiAliasing( bool flag );
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bool antiAliasingEnabled() const;
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void enableMapTileRendering( bool flag );
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void panActionEnd( QPoint releasePoint );
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void panAction( QMouseEvent *event );
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QPoint mouseLastXY();
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void setPreviewModeEnabled( bool previewEnabled );
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bool previewModeEnabled() const;
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void setPreviewMode( QgsPreviewEffect::PreviewMode mode );
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QgsPreviewEffect::PreviewMode previewMode() const;
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QgsSnappingUtils *snappingUtils() const;
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void setSnappingUtils( QgsSnappingUtils *utils );
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void setExpressionContextScope( const QgsExpressionContextScope &scope );
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QgsExpressionContextScope &expressionContextScope();
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// const QgsExpressionContextScope &expressionContextScope() const;
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void setSegmentationTolerance( double tolerance );
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void setSegmentationToleranceType( QgsAbstractGeometry::SegmentationToleranceType type );
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QList< QgsMapCanvasAnnotationItem *> annotationItems() const;
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bool annotationsVisible() const;
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void setAnnotationsVisible( bool visible );
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void setLabelingEngineSettings( const QgsLabelingEngineSettings &settings );
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const QgsLabelingEngineSettings &labelingEngineSettings() const;
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public slots:
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//! Repaints the canvas map
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void refresh();
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//! Receives signal about selection change, and pass it on with layer info
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void selectionChangedSlot();
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//! Save the convtents of the map canvas to disk as an image
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void saveAsImage( const QString& fileName, QPixmap * QPixmap = 0, const QString& = "PNG" );
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//! This slot is connected to the visibility change of one or more layers
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void layerStateChange();
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//! This slot is connected to the layer's CRS change
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void layerCrsChange();
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void setRenderFlag( bool flag );
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//! stop rendering (if there is any right now)
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//! @note added in 2.4
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void stopRendering();
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//! called to read map canvas settings from project
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void readProject( const QDomDocument & );
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//! called to write map canvas settings to project
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void writeProject( QDomDocument & );
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//! ask user about datum transformation
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void getDatumTransformInfo( const QgsMapLayer* ml, const QString& srcAuthId, const QString& destAuthId );
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//! Sets the factor of magnification to apply to the map canvas. Indeed, we
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//! increase/decrease the DPI of the map settings according to this factor
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//! in order to render marker point, labels, ... bigger.
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//! @note added in 2.16
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void setMagnificationFactor( double factor );
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//! Lock the scale, so zooming can be performed using magnication
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//! @note added in 2.16
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//! @see scaleLocked()
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void setScaleLocked( bool isLocked );
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//! Zoom in with fixed factor
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void zoomIn();
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//! Zoom out with fixed factor
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void zoomOut();
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signals:
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/** Emits current mouse position
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\note changed in 1.3 */
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void xyCoordinates( const QgsPoint &p );
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//! Emitted when the scale of the map changes
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void scaleChanged( double );
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//! Emitted when the extents of the map change
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void extentsChanged();
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//! Emitted when the rotation of the map changes
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//! @note added in 2.8
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void rotationChanged( double );
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//! Emitted when the scale of the map changes
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//! @note added in 2.16
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void magnificationChanged( double );
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/** Emitted when the canvas has rendered.
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* Passes a pointer to the painter on which the map was drawn. This is
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* useful for plugins that wish to draw on the map after it has been
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* rendered. Passing the painter allows plugins to work when the map is
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* being rendered onto a pixmap other than the mapCanvas own pixmap member.
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*
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*/
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//! TODO: deprecate when decorations are reimplemented as map canvas items
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//! - anything related to rendering progress is not visible outside of map canvas
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//! - additional drawing shall be done directly within the renderer job or independently as a map canvas item
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void renderComplete( QPainter * );
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// ### QGIS 3: renamte to mapRefreshFinished()
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//! Emitted when canvas finished a refresh request.
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void mapCanvasRefreshed();
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// ### QGIS 3: rename to mapRefreshStarted()
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//! Emitted when the canvas is about to be rendered.
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void renderStarting();
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//! Emitted when a new set of layers has been received
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void layersChanged();
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//! Emit key press event
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void keyPressed( QKeyEvent * e );
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//! Emit key release event
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void keyReleased( QKeyEvent * e );
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void mapToolSet( QgsMapTool *newTool, QgsMapTool* oldTool );
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// ### QGIS 3: remove the signal
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//! Emitted when selection in any layer gets changed
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void selectionChanged( QgsMapLayer * layer );
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//! Emitted when zoom last status changed
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void zoomLastStatusChanged( bool );
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//! Emitted when zoom next status changed
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void zoomNextStatusChanged( bool );
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//! Emitted when map CRS has changed
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//! @note added in 2.4
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void destinationCrsChanged();
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//! Emitted when the current layer is changed
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//! @note added in 2.8
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void currentLayerChanged( QgsMapLayer* layer );
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void layerStyleOverridesChanged();
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void themeChanged( const QString &theme );
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void messageEmitted( const QString &title, const QString &message, QgsMessageBar::MessageLevel = QgsMessageBar::INFO );
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protected:
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//! Overridden standard event to be gestures aware
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bool event( QEvent * e );
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//! Overridden key press event
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void keyPressEvent( QKeyEvent * e );
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//! Overridden key release event
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void keyReleaseEvent( QKeyEvent * e );
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//! Overridden mouse double click event
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void mouseDoubleClickEvent( QMouseEvent * e );
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//! Overridden mouse move event
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void mouseMoveEvent( QMouseEvent * e );
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//! Overridden mouse press event
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void mousePressEvent( QMouseEvent * e );
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//! Overridden mouse release event
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void mouseReleaseEvent( QMouseEvent * e );
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//! Overridden mouse wheel event
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void wheelEvent( QWheelEvent * e );
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//! Overridden resize event
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void resizeEvent( QResizeEvent * e );
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//! Overridden paint event
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void paintEvent( QPaintEvent * e );
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//! Overridden drag enter event
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void dragEnterEvent( QDragEnterEvent * e );
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//! called when panning is in action, reset indicates end of panning
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void moveCanvasContents( bool reset = false );
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//! called on resize or changed extent to notify canvas items to change their rectangle
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void updateCanvasItemPositions();
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//! Make sure the datum transform store is properly populated
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void updateDatumTransformEntries();
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private:
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void connectNotify( const char * signal );
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}; // class QgsMapCanvas
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