fix issue #5: ensure valid CRS returned from QgsProjectionSelectionDi…

…alog

coordinator.py

@@ -275,10 +275,17 @@ def setWarningMessage(self, message):
     def openCrsSelectionDialogForSection(self, section):
         projSelector = QgsProjectionSelectionDialog()
         if(projSelector.exec()):
+            selectedCrs = projSelector.crs()
+
+            # workaround for checking if there was no CRS selected
+            # but user clicked 'OK': check if authid-string is empty:
+            if not selectedCrs.authid() :
+                return
+
             if section == CoordinatorDockWidget.SectionInput:
-                self.setInputCrs(projSelector.crs())
+                self.setInputCrs(selectedCrs)
             elif section == CoordinatorDockWidget.SectionOutput:
-                self.setOutputCrs(projSelector.crs())
+                self.setOutputCrs(selectedCrs)
 
     def setOutputCrsToCanvasCrs(self):
         crs = self.canvas.mapSettings().destinationCrs()

metadata.txt

@@ -25,6 +25,7 @@ repository=https://github.com/iona5/coordinator
 changelog=0.4
     - pull request 16: use default values when capturing points (thanks @AlexanderFinkbeiner)
     - fix capture with wrong coordinate system with Point geometry
+    - ensure a valid CRS is selected when changing through QgsProjectionSelectionDialog (issue #5)
   0.3
     - issue #2: make sure capture tool is deselected when user selects another tool
     - issue #12: negative coordinates in geodetic systems were not properly processed