feat: remove blue lines when using GUI

fixes #120 

Co-authored-by: Jakob Schnell <Jakob.Schnell@heigit.org>

CHANGELOG.md

@@ -49,6 +49,7 @@ RELEASING:
 - Add styling of routing output in main plugin ([#149](https://github.com/GIScience/orstools-qgis-plugin/issues/149))
 - make items in centroid list drag and droppable ([#144](https://github.com/GIScience/orstools-qgis-plugin/issues/144))
 - Add save button for vertices ([#144](https://github.com/GIScience/orstools-qgis-plugin/issues/144))
+- remove blue lines every time the red X button is clicked ([#120](https://github.com/GIScience/orstools-qgis-plugin/issues/120))
 
 ## [1.6.0] - 2023-07-25
 

ORStools/gui/ORStoolsDialog.py

@@ -505,6 +505,10 @@ def _on_clear_listwidget_click(self):
             self.routing_fromline_list.clear()
             self._clear_annotations()
 
+        # Remove blue lines (rubber band)
+        if self.line_tool:
+            self.line_tool.canvas.scene().removeItem(self.line_tool.rubberBand)
+
     def _linetool_annotate_point(self, point, idx, crs=None):
         if not crs:
             crs = self._iface.mapCanvas().mapSettings().destinationCrs()
@@ -533,6 +537,10 @@ def _clear_annotations(self):
 
     def _on_linetool_init(self):
         """Hides GUI dialog, inits line maptool and add items to line list box."""
+        # Remove blue lines (rubber band)
+        if self.line_tool:
+            self.line_tool.canvas.scene().removeItem(self.line_tool.rubberBand)
+
         self.hide()
         self.routing_fromline_list.clear()
         # Remove all annotations which were added (if any)