def addMemoryLayer(self):
'''Adds a layer to contain the feature defined by a bounding box, wkt,
digitised poly|line|point or selection from other layer.
'''
foi_type = self.foi_type.lower()
if foi_type == 'areaofinterestdefiner':
layer = QgsVectorLayer("Polygon", "Area of Interest", "memory")
if foi_type == 'lineofinterestdefiner':
layer = QgsVectorLayer("Linestring", "Line of Interest", "memory")
if foi_type == 'pointofinterestdefiner':
layer = QgsVectorLayer("Point", "Point of Interest", "memory")
if foi_type == 'areaofinterestdefiner':
sym = QgsSymbol(QGis.Polygon)
sym.setColor(QtCore.Qt.black)
sym.setFillColor(QtCore.Qt.green)
sym.setFillStyle(QtCore.Qt.Dense6Pattern)
sym.setLineWidth(0.5)
sr = QgsSingleSymbolRenderer(QGis.Polygon)
if foi_type == 'lineofinterestdefiner':
sym = QgsSymbol(QGis.Line)
sym.setColor(QtCore.Qt.black)
sym.setFillColor(QtCore.Qt.green)
sym.setFillStyle(QtCore.Qt.SolidPattern)
sym.setLineWidth(0.5)
sr = QgsSingleSymbolRenderer(QGis.Line)
if foi_type == 'pointofinterestdefiner':
sym = QgsSymbol(QGis.Point)
sym.setColor(QtCore.Qt.black)
sym.setFillColor(QtCore.Qt.green)
sym.setFillStyle(QtCore.Qt.SolidPattern)
sym.setLineWidth(0.3)
sym.setPointSize(4)
sym.setNamedPointSymbol("hard:triangle")
sr = QgsSingleSymbolRenderer(QGis.Point)
sr.addSymbol(sym)
layer.setRenderer(sr)
if not layer.isValid():
print "invalid layer"
return
ml_dp = layer.dataProvider()
ml_dp.addAttributes([QgsField("gid", QtCore.QVariant.String)])
# add layer to the registry
self.mem_layer_obj = QgsMapLayerRegistry.instance().addMapLayer(layer)
# set extent to the extent of our layer
#self.canvas.setExtent(layer.extent())
# set the map canvas layer set
cl = QgsMapCanvasLayer(layer)
self.mapCanvasLayers.insert(0, cl)
#layers = [cl]
self.canvas.setLayerSet(self.mapCanvasLayers)
print "added Layer"
