FIX+IMP (display/erase a shape identified by its entry)

src/GEOM_PY/geomtools.py

@@ -91,7 +91,7 @@ class GeomStudyTools:
         if GEOM is None:
             GEOM = __import__("GEOM")
         if studyEditor is None:
-            studyEditor = helper.getStudyEditor()
+            studyEditor = getStudyEditor()
         self.editor = studyEditor
 
     def displayShapeByName(self, shapeName, color = None):
@@ -115,13 +115,31 @@ class GeomStudyTools:
             if geomObj:
                 shape = geomObj._narrow(GEOM.GEOM_Object)
                 if shape:
+                    return self.displayShapeByEntry(entry,color)
+        return False
+
+    def displayShapeByEntry(self, entry, color = None):
+        """
+        Display the geometrical shape whose entry is given by `entry`.
+        """
         geomgui = salome.ImportComponentGUI("GEOM")            
         geomgui.createAndDisplayGO(entry)
         geomgui.setDisplayMode(entry, DisplayMode)
         if color is not None:
             geomgui.setColor(entry, color[0], color[1], color[2])
         return True
-        return False
+
+    def eraseShapeByEntry(self, entry):
+        """
+        Erase the geometrical shape whose entry is given by
+        `entry`. Please note that the shape is just erased from the
+        viewer. The associated study object still exists in the study,
+        and the geom object still exists in the GEOM engine.
+        """
+        geomgui = salome.ImportComponentGUI("GEOM")
+        eraseFromAllWindows=True
+        geomgui.eraseGO(entry,eraseFromAllWindows)
+        return True
     
     def getGeomObjectSelected(self):
         '''