[Qgis-developer] add rasterlayer to qgsmapcanvas

[Denis Rouzaud]

can you maybe show us the whole code?

Cheers,

Denis

On 05.06.2014 20:55, Felix Schmidt wrote:
> The layer is loading in the legend and shown in the main window.
> What do you mean, with the symbology. In front of the layer, in the 
> legend, is a raster icon, if you mean this.
>
> I copied the code from the slot to the building of the ui. so the 
> layer is loading in the canvas by building the gui and not by clicking 
> in the toolbar.
>
> If I start qgis with this state of code, its starts and load load the 
> layer, when I start the plugin the canvas is still white and when I 
> clicked on the starting picture of qgis which is still there, the 
> layer is shown in the canvas of the plugin.
>
> It's confusing me.
>
> Felix
>
> Am 05.06.2014 20:20, schrieb Tim Sutton:
>> Hi
>>
>>
>>
>> On Fri, Jun 6, 2014 at 12:15 AM, Felix Schmidt 
>> <felix.schmidt at uni-weimar.de <mailto:felix.schmidt at uni-weimar.de>> wrote:
>>
>>     Same mistake with refresh() at the end.
>>
>>     Am 05.06.2014 19:11, schrieb Rouzaud Denis:
>>
>>         self.canvasRaster.refresh() at the end ?
>>
>>         On 05 Jun 2014, at 18:27, Felix Schmidt
>>         <felix.schmidt at uni-weimar.de
>>         <mailto:felix.schmidt at uni-weimar.de>> wrote:
>>
>>
>>
>>
>>             Hello everyone,
>>             I try to load on signal, a rasterlayer to qgsmapcanvas. I
>>             try it like in
>>             the pycookbook:
>>
>>             @QtCore.pyqtSlot()
>>                  def loadRasterImage(self):
>>                  print "slot works"
>>                      fileName = QFileDialog.getOpenFileName(None,
>>             "historical map",
>>             ".", "Image Files (*.png *.jpg *.bmp *.tiff)")
>>                      fileInfo = QFileInfo(fileName)
>>                      baseName = fileInfo.baseName()
>>                      rlayer = QgsRasterLayer(fileName, baseName)
>>                      if not rlayer.isValid():
>>                          print "Layer failed to load!"
>>              QgsMapLayerRegistry.instance().addMapLayer(rlayer)
>>                  print rlayer.extent().yMinimum()
>>              self.canvasRaster.setExtent(rlayer.extent())
>>                  self.canvasRaster.setLayerSet( [
>>             QgsMapCanvasLayer(rlayer) ] )
>>
>>             self.canvasRaster is defined in the gui . I search for 8h
>>             but I dont
>>             find a solutionen, because there are no errors.
>>
>>             It load the rasterlayer to the main program of qgis, but
>>             not in my
>>             qgsmapcanvas. it is still white.
>>
>>
>> Is the layer loaded, showing in the legend but just not visible? 
>> Check the symbology for the layer is defined properly if this is the 
>> case.
>>
>> Regards
>>
>> Tim
>>
>>             please help me.
>>
>>             Felix
>>
>>
>>
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>>
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>>
>>
>>
>> -- 
>> Tim Sutton - QGIS Project Steering Committee Member
>> ==============================================
>> Please do not email me off-list with technical
>> support questions. Using the lists will gain
>> more exposure for your issues and the knowledge
>> surrounding your issue will be shared with all.
>>
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>> ==============================================
>

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