Bool Tool: update to version 0.3.7, Fix key registration issues

Bumped version to 0.3.7
Part of the T51547:
Refactor the shortcuts registering code as it left lingering
keys in Object Mode which lead to crashes on reload with
add-ons registering keys in that mode like 3D View pies

Changing the key registering in 3D View Pie menus to one used
in official pies would lead to exceptions and crashing Blender
after reload

Use bl_description instead of quotes for tips
Remove a redundant separator in the Bool Menu
Add a few lines to the Help
Update wiki link

object_boolean_tools.py

@@ -21,12 +21,12 @@
 bl_info = {
     "name": "Bool Tool",
     "author": "Vitor Balbio, Mikhail Rachinskiy, TynkaTopi, Meta-Androcto",
-    "version": (0, 3, 6),
+    "version": (0, 3, 7),
     "blender": (2, 78, 0),
     "location": "View3D > Toolshelf",
     "description": "Bool Tools Hotkey: Ctrl Shift B",
-    "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Object/BoolTool",
-    "tracker_url": "https://developer.blender.org/maniphest/task/edit/form/2/",
+    "wiki_url": "https://wiki.blender.org/index.php/Extensions:2.6/Py/"
+                "Scripts/Object/BoolTool",
     "category": "Object",
     }
 
@@ -152,12 +152,13 @@ def Operation(context, _operation):
             actObj = context.active_object
             selObj.hide_render = True
             cyclesVis = selObj.cycles_visibility
-            # for obj in bpy.context.scene.objects:
-            #   if isCanvas(obj):
-            #      for mod in obj.modifiers:
-            #         if(mod.name == "BTool_" + selObj.name):
-            #            obj.modifiers.remove(mod)
-
+            """
+            for obj in bpy.context.scene.objects:
+                if isCanvas(obj):
+                    for mod in obj.modifiers:
+                        if(mod.name == "BTool_" + selObj.name):
+                            obj.modifiers.remove(mod)
+            """
             if useWire:
                 selObj.draw_type = "WIRE"
             else:
@@ -171,7 +172,7 @@ def Operation(context, _operation):
             if _operation == "SLICE":
                 # copies dupli_group property(empty), but group property is empty (users_group = None)
                 clone = context.active_object.copy()
-                # clone.select=True
+                # clone.select = True
                 context.scene.objects.link(clone)
                 sliceMod = clone.modifiers.new("BTool_" + selObj.name, "BOOLEAN")  # add mod to clone obj
                 sliceMod.object = selObj
@@ -245,7 +246,7 @@ def Remove(context, thisObj_name, Prop):
                     RemoveThis(mod.object.name)
 
 
-# Tooble the Enable the Brush Object Propertie
+# Toggle the Enable the Brush Object Property
 def EnableBrush(context, objList, canvas):
     for obj in objList:
         for mod in canvas.modifiers:
@@ -288,7 +289,7 @@ def EnableThisBrush(context, set):
                 return
 
 
-# Tooble the Fast Transform Propertie of the Active Brush
+# Toggle the Fast Transform Property of the Active Brush
 def EnableFTransf(context):
     actObj = bpy.context.active_object
 
@@ -371,7 +372,7 @@ def ApplyThisBrush(context, brush):
                         canvas.vertex_groups.active.name = "BTool_" + brush.name
                     """
 
-    # Garbage Colletor
+    # Garbage Collector
     brush.select = True
     # bpy.ops.object.delete()
 
@@ -400,9 +401,10 @@ def HandleScene(scene):
 # ------------------ Bool Tool OPERATORS-----------------------------------------------------
 
 class BTool_DrawPolyBrush(Operator):
-    """Draw Polygonal Mask, can be applyied to Canvas > Brush or Directly. ESC to Exit"""
     bl_idname = "btool.draw_polybrush"
     bl_label = "Draw Poly Brush"
+    bl_description = ("Draw Polygonal Mask, can be applyied to Canvas > Brush "
+                      "or Directly. ESC to Exit")
 
     count = 0
 
@@ -469,9 +471,9 @@ class BTool_DrawPolyBrush(Operator):
 
 # Fast Transform
 class BTool_FastTransform(Operator):
-    """Enable Fast Transform"""
     bl_idname = "btool.fast_transform"
     bl_label = "Fast Transform"
+    bl_description = "Enable Fast Transform"
 
     operator = StringProperty("")
 
@@ -526,9 +528,9 @@ class BTool_FastTransform(Operator):
 
 # Boolean Union Operator
 class BTool_Union(Operator):
-    """This operator add a union brush to a canvas"""
     bl_idname = "btool.boolean_union"
     bl_label = "Brush Union"
+    bl_description = "This operator add a union brush to a canvas"
 
     @classmethod
     def poll(cls, context):
@@ -541,9 +543,9 @@ class BTool_Union(Operator):
 
 # Boolean Intersection Operator
 class BTool_Inters(Operator):
-    """This operator add a intersect brush to a canvas"""
     bl_idname = "btool.boolean_inters"
     bl_label = "Brush Intersection"
+    bl_description = "This operator add a intersect brush to a canvas"
 
     @classmethod
     def poll(cls, context):
@@ -556,9 +558,9 @@ class BTool_Inters(Operator):
 
 # Boolean Difference Operator
 class BTool_Diff(Operator):
-    """This operator add a difference brush to a canvas"""
     bl_idname = "btool.boolean_diff"
     bl_label = "Brush Difference"
+    bl_description = "This operator add a difference brush to a canvas"
 
     @classmethod
     def poll(cls, context):
@@ -571,9 +573,9 @@ class BTool_Diff(Operator):
 
 # Boolean Slices Operator
 class BTool_Slice(Operator):
-    """This operator add a intersect brush to a canvas"""
     bl_idname = "btool.boolean_slice"
     bl_label = "Brush Slice"
+    bl_description = "This operator add a intersect brush to a canvas"
 
     @classmethod
     def poll(cls, context):
@@ -647,9 +649,9 @@ class AutoBoolean:
 
 
 class Auto_Union(AutoBoolean, Operator):
-    """Combine selected objects"""
     bl_idname = "btool.auto_union"
     bl_label = "Union"
+    bl_description = "Combine selected objects"
     bl_options = {'REGISTER', 'UNDO'}
 
     mode = 'UNION'
@@ -661,9 +663,9 @@ class Auto_Union(AutoBoolean, Operator):
 
 
 class Auto_Difference(AutoBoolean, Operator):
-    """Subtract selected objects from active object"""
     bl_idname = "btool.auto_difference"
     bl_label = "Difference"
+    bl_description = "Subtract selected objects from active object"
     bl_options = {'REGISTER', 'UNDO'}
 
     mode = 'DIFFERENCE'
@@ -675,9 +677,9 @@ class Auto_Difference(AutoBoolean, Operator):
 
 
 class Auto_Intersect(AutoBoolean, Operator):
-    """Keep only intersecting geometry"""
     bl_idname = "btool.auto_intersect"
     bl_label = "Intersect"
+    bl_description = "Keep only intersecting geometry"
     bl_options = {'REGISTER', 'UNDO'}
 
     mode = 'INTERSECT'
@@ -689,9 +691,10 @@ class Auto_Intersect(AutoBoolean, Operator):
 
 
 class Auto_Slice(AutoBoolean, Operator):
-    """Slice active object along the selected object (can handle only two objects at a time)"""
     bl_idname = "btool.auto_slice"
     bl_label = "Slice"
+    bl_description = ("Slice active object along the selected object\n"
+                      "(can handle only two objects at a time)")
     bl_options = {'REGISTER', 'UNDO'}
 
     def execute(self, context):
@@ -718,10 +721,10 @@ class Auto_Slice(AutoBoolean, Operator):
 
 
 class Auto_Subtract(AutoBoolean, Operator):
-    """Subtract selected object from active object, """ \
-    """subtracted object not removed (can handle only two objects at a time)"""
     bl_idname = "btool.auto_subtract"
     bl_label = "Subtract"
+    bl_description = ("Subtract selected object from active object, subtracted object not removed\n"
+                      "(can handle only two objects at a time)")
     bl_options = {'REGISTER', 'UNDO'}
 
     def execute(self, context):
@@ -742,9 +745,10 @@ class Auto_Subtract(AutoBoolean, Operator):
 
 # Find the Brush Selected in Three View
 class BTool_FindBrush(Operator):
-    """Find the this brush"""
     bl_idname = "btool.find_brush"
     bl_label = ""
+    bl_description = "Find the this brush"
+
     obj = StringProperty("")
 
     @classmethod
@@ -761,11 +765,12 @@ class BTool_FindBrush(Operator):
         return {'FINISHED'}
 
 
-# Mode The Modifier in The Stack Up or Down
+# Move The Modifier in The Stack Up or Down
 class BTool_MoveStack(Operator):
-    """Move this Brush Up/Down in the Stack"""
     bl_idname = "btool.move_stack"
     bl_label = ""
+    bl_description = "Move this Brush Up/Down in the Stack"
+
     modif = StringProperty("")
     direction = StringProperty("")
 
@@ -781,11 +786,11 @@ class BTool_MoveStack(Operator):
         return {'FINISHED'}
 
 
-# Enable or Disable a Brush in th Three View
+# Enable or Disable a Brush in the Three View
 class BTool_EnableBrush(Operator):
-    """Removes all BoolTool config assigned to it"""
     bl_idname = "btool.enable_brush"
     bl_label = ""
+    bl_description = "Removes all BoolTool config assigned to it"
 
     thisObj = StringProperty("")
 
@@ -799,11 +804,11 @@ class BTool_EnableBrush(Operator):
         return {'FINISHED'}
 
 
-# Enable or Disabel a Brush Directly
+# Enable or Disable a Brush Directly
 class BTool_EnableThisBrush(Operator):
-    """ Toggles this brush"""
     bl_idname = "btool.enable_this_brush"
     bl_label = ""
+    bl_description = "Toggles this brush"
 
     @classmethod
     def poll(cls, context):
@@ -814,11 +819,11 @@ class BTool_EnableThisBrush(Operator):
         return {'FINISHED'}
 
 
-# Enable or Disabel a Brush Directly
+# Enable or Disable a Brush Directly
 class BTool_EnableFTransform(Operator):
-    """Use Fast Transformations to improve speed"""
     bl_idname = "btool.enable_ftransf"
     bl_label = ""
+    bl_description = "Use Fast Transformations to improve speed"
 
     @classmethod
     def poll(cls, context):
@@ -833,10 +838,11 @@ class BTool_EnableFTransform(Operator):
 
 # Remove a Brush or a Canvas
 class BTool_Remove(Operator):
-    """Removes all BoolTool config assigned to it"""
     bl_idname = "btool.remove"
     bl_label = ""
+    bl_description = "Removes all BoolTool config assigned to it"
     bl_options = {'UNDO'}
+
     thisObj = StringProperty("")
     Prop = StringProperty("")
 
@@ -851,9 +857,9 @@ class BTool_Remove(Operator):
 
 # Apply All to Canvas
 class BTool_AllBrushToMesh(Operator):
-    """Apply all brushes of this canvas"""
     bl_idname = "btool.to_mesh"
     bl_label = "Apply All Canvas"
+    bl_description = "Apply all brushes of this canvas"
     bl_options = {'UNDO'}
 
     @classmethod
@@ -861,16 +867,16 @@ class BTool_AllBrushToMesh(Operator):
         return context.active_object is not None
 
     def execute(self, context):
-        list = bpy.context.selected_objects
-        ApplyAll(context, list)
+        lists = bpy.context.selected_objects
+        ApplyAll(context, lists)
         return {'FINISHED'}
 
 
 # Apply This Brush to the Canvas
 class BTool_BrushToMesh(Operator):
-    """Apply this brush to the canvas"""
     bl_idname = "btool.brush_to_mesh"
     bl_label = "Apply this Brush to Canvas"
+    bl_description = "Apply this brush to the canvas"
     bl_options = {'UNDO'}
 
     @classmethod
@@ -913,7 +919,6 @@ class BoolTool_Menu(Menu):
         layout.operator(BTool_Union.bl_idname, icon="ROTATECOLLECTION")
         layout.operator(BTool_Inters.bl_idname, icon="ROTATECENTER")
         layout.operator(BTool_Slice.bl_idname, icon="ROTATECENTER")
-        layout.separator()
 
         if (isCanvas(context.active_object)):
             layout.separator()
@@ -1165,18 +1170,22 @@ class BoolTool_BViwer(Panel):
 
 # ------------------ BOOL TOOL Help ----------------------------
 class BoolTool_help(Operator):
-    """Tip"""
     bl_idname = "help.bool_tool"
-    bl_label = ""
+    bl_label = "Help"
+    bl_description = "Tool Help - click to read some basic information"
 
     def draw(self, context):
         layout = self.layout
         layout.label("To use:")
-        layout.label("Select two or more objects.")
+        layout.label("Select two or more objects,")
+        layout.label("choose one option from the panel")
+        layout.label("or from the Ctrl + Shift + B menu")
+
         layout.label("Auto Boolean:")
-        layout.label("Apply boolean operation directly.")
+        layout.label("Apply Boolean operation directly.")
+
         layout.label("Brush Boolean:")
-        layout.label("Create boolean brush set up.")
+        layout.label("Create a Boolean brush setup.")
 
     def execute(self, context):
         return {'FINISHED'}
@@ -1197,11 +1206,11 @@ def UpdateBoolTool_Pref(self, context):
 # Add-ons Preferences Update Panel
 
 # Define Panel classes for updating
-panels = [
+panels = (
         BoolTool_Tools,
         BoolTool_Config,
         BoolTool_BViwer,
-        ]
+        )
 
 
 def update_panel(self, context):
@@ -1354,7 +1363,7 @@ classes = (
     BTool_EnableFTransform,
     BTool_FastTransform,
 
-    BoolTool_help
+    BoolTool_help,
     )
 
 
@@ -1385,10 +1394,11 @@ def RegisterFastT():
 # Fast Transform HotKeys UnRegister
 def UnRegisterFastT():
     wm = bpy.context.window_manager
-    km = wm.keyconfigs.addon.keymaps.new(name='Object Mode', space_type='EMPTY')
+    kc = wm.keyconfigs.addon
+    if kc:
+        for km, kmi in addon_keymapsFastT:
+            km.keymap_items.remove(kmi)
 
-    for km, kmi in addon_keymapsFastT:
-        km.keymap_items.remove(kmi)
     addon_keymapsFastT.clear()
 
 
@@ -1416,33 +1426,47 @@ def register():
 
     # create the boolean menu hotkey
     km = wm.keyconfigs.addon.keymaps.new(name='Object Mode')
+
     kmi = km.keymap_items.new('wm.call_menu', 'B', 'PRESS', ctrl=True, shift=True)
     kmi.properties.name = 'OBJECT_MT_BoolTool_Menu'
+    addon_keymaps.append((km, kmi))
 
     # Brush Operators
     kmi = km.keymap_items.new(BTool_Union.bl_idname, 'NUMPAD_PLUS', 'PRESS', ctrl=True)
+    addon_keymaps.append((km, kmi))
     kmi = km.keymap_items.new(BTool_Diff.bl_idname, 'NUMPAD_MINUS', 'PRESS', ctrl=True)
+    addon_keymaps.append((km, kmi))
     kmi = km.keymap_items.new(BTool_Inters.bl_idname, 'NUMPAD_ASTERIX', 'PRESS', ctrl=True)
+    addon_keymaps.append((km, kmi))
     kmi = km.keymap_items.new(BTool_Slice.bl_idname, 'NUMPAD_SLASH', 'PRESS', ctrl=True)
+    addon_keymaps.append((km, kmi))
     kmi = km.keymap_items.new(BTool_BrushToMesh.bl_idname, 'NUMPAD_ENTER', 'PRESS', ctrl=True)
+    addon_keymaps.append((km, kmi))
     kmi = km.keymap_items.new(BTool_AllBrushToMesh.bl_idname, 'NUMPAD_ENTER', 'PRESS', ctrl=True, shift=True)
+    addon_keymaps.append((km, kmi))
 
     # Auto Operators
     kmi = km.keymap_items.new(Auto_Union.bl_idname, 'NUMPAD_PLUS', 'PRESS', ctrl=True, shift=True)
+    addon_keymaps.append((km, kmi))
     kmi = km.keymap_items.new(Auto_Difference.bl_idname, 'NUMPAD_MINUS', 'PRESS', ctrl=True, shift=True)
+    addon_keymaps.append((km, kmi))
     kmi = km.keymap_items.new(Auto_Intersect.bl_idname, 'NUMPAD_ASTERIX', 'PRESS', ctrl=True, shift=True)
+    addon_keymaps.append((km, kmi))
     kmi = km.keymap_items.new(Auto_Slice.bl_idname, 'NUMPAD_SLASH', 'PRESS', ctrl=True, shift=True)
-
-    addon_keymaps.append(km)
+    addon_keymaps.append((km, kmi))
 
 
 def unregister():
     # Keymapping
     # remove keymaps when add-on is deactivated
     wm = bpy.context.window_manager
-    for km in addon_keymaps:
-        wm.keyconfigs.addon.keymaps.remove(km)
-    del addon_keymaps[:]
+    kc = wm.keyconfigs.addon
+    if kc:
+        for km, kmi in addon_keymaps:
+            km.keymap_items.remove(kmi)
+
+    addon_keymaps.clear()
+    UnRegisterFastT()
 
     bpy.types.VIEW3D_MT_object.remove(VIEW3D_BoolTool_Menu)
     try: