mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-24 00:47:57 -05:00
bbd36b107f
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@6415 c8812cc2-4d05-0410-92ff-de0c093fc19c
45 lines
2.2 KiB
Plaintext
45 lines
2.2 KiB
Plaintext
|
|
/**Abstract base class for renderers. A renderer holds all the information necessary to draw the contents of a vector layer to a map canvas. The vector layer then passes each feature to paint to the renderer*/
|
|
class QgsRenderer /Abstract/
|
|
{
|
|
%TypeHeaderCode
|
|
#include <qgsrenderer.h>
|
|
%End
|
|
|
|
public:
|
|
/** Default ctor sets up selection colour from project properties */
|
|
QgsRenderer();
|
|
/** Virtual destructor because we have virtual methods... */
|
|
virtual ~QgsRenderer();
|
|
/**A vector layer passes features to a renderer object to change the brush and pen of the qpainter
|
|
@param p the painter storing brush and pen
|
|
@param f a pointer to the feature to be rendered
|
|
@param pic pointer to a marker from SVG (is only used by marker renderers)
|
|
@param scalefactor pointer to the scale factor for the marker image*/
|
|
virtual void renderFeature(QPainter* p, QgsFeature& f,QImage* pic, double* scalefactor, bool selected, double widthScale = 1)=0;
|
|
/**Reads the renderer configuration from an XML file
|
|
@param rnode the DOM node to read
|
|
@param vl the vector layer which will be associated with the renderer*/
|
|
virtual void readXML(const QDomNode& rnode, QgsVectorLayer& vl)=0;
|
|
/**Writes the contents of the renderer to a configuration file
|
|
@ return true in case of success*/
|
|
virtual bool writeXML( QDomNode & layer_node, QDomDocument & document ) const=0;
|
|
/** Returns true, if attribute values are used by the renderer and false otherwise*/
|
|
virtual bool needsAttributes() const=0;
|
|
/**Returns a list with indexes of classification attributes*/
|
|
QList<int> classificationAttributes() const=0;
|
|
/**Returns the renderers name*/
|
|
virtual QString name() const=0;
|
|
/**Return symbology items*/
|
|
// TODO: wrap
|
|
//virtual const std::list<QgsSymbol*> symbols() const=0;
|
|
/**Returns a copy of the renderer (a deep copy on the heap)*/
|
|
virtual QgsRenderer* clone() const=0;
|
|
/** Change selection color */
|
|
static void setSelectionColor(QColor color);
|
|
/**Returns true if this renderer returns a pixmap in the render method (e.g. for point data or diagrams)*/
|
|
virtual bool containsPixmap() const;
|
|
|
|
};
|
|
|