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class QgsMapCanvasItem : QGraphicsItem
{
%TypeHeaderCode
#include <qgsmapcanvasitem.h>
%End
protected:
//! protected constructor: cannot be constructed directly
QgsMapCanvasItem( QgsMapCanvas* mapCanvas /TransferThis/ );
virtual ~QgsMapCanvasItem();
//! function to be implemented by derived classes
virtual void paint( QPainter * painter ) = 0;
//! paint function called by map canvas
virtual void paint( QPainter * painter,
const QStyleOptionGraphicsItem * option,
QWidget * widget = 0 );
//! schedules map canvas for repaint
void updateCanvas();
/**Sets render context parameters
@param p painter for rendering
@param context out: configured context
@return true in case of success
@note added in version 1.5*/
bool setRenderContextVariables( QPainter* p, QgsRenderContext& context ) const;
public:
//! called on changed extent or resize event to update position of the item
virtual void updatePosition();
//! default implementation for canvas items
virtual QRectF boundingRect() const;
//! sets current offset, to be called from QgsMapCanvas
//! @deprecated since v2.4 - not called by QgsMapCanvas anymore
void setPanningOffset( const QPoint& point ) /Deprecated/;
//! returns canvas item rectangle
QgsRectangle rect() const;
//! sets canvas item rectangle
void setRect( const QgsRectangle& r );
//! transformation from screen coordinates to map coordinates
QgsPoint toMapCoordinates( const QPoint& point );
//! transformation from map coordinates to screen coordinates
QPointF toCanvasCoordinates( const QgsPoint& point );
};
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