wxGUI gcp: Allow choose map display web service layer as target map to display

[tmszi]

wxGUI gcp wizard dialog (select web service layer as target raster map to display):

wxGUI gcp editor frame (render web service layer as target raster map)

[neteler]

I tried this PR in the current master but get an error:

• g.gui
• open a WMS
• File > Georectify
• error:

Traceback (most recent call last):
  File "/home/mneteler/software/grass_master/dist.x86_64-pc-
linux-gnu/gui/wxpython/lmgr/frame.py", line 547, in
OnGCPManager

GCPWizard(self, self._giface)
  File "/home/mneteler/software/grass_master/dist.x86_64-pc-
linux-gnu/gui/wxpython/gcp/manager.py", line 155, in
__init__

self.mappage = DispMapPage(self.wizard, self)
  File "/home/mneteler/software/grass_master/dist.x86_64-pc-
linux-gnu/gui/wxpython/gcp/manager.py", line 790, in
__init__

extraItems=self.GetSelectTargetRasterExtraItems())
  File "/home/mneteler/software/grass_master/dist.x86_64-pc-
linux-gnu/gui/wxpython/gcp/manager.py", line 983, in
GetSelectTargetRasterExtraItems

self.web_servc_lyrs_root_node_name:
self.GetWebServiceLayers().keys()
  File "/home/mneteler/software/grass_master/dist.x86_64-pc-
linux-gnu/gui/wxpython/gcp/manager.py", line 970, in
GetWebServiceLayers

for layer in self._giface.GetLayerList():
AttributeError
:
'DispMapPage' object has no attribute '_giface'

Maybe a code rebase is needed?

[tmszi]

I tried this PR in the current master but get an error:

Maybe a code rebase is needed?

Rebase + fix this change in DispMapPage class.

self._giface.GetLayerList() -> self.parent._giface.GetLayerList()

[neteler]

It is working nicely, a great improvement!