simple_deform_helper/draw.py

@@ -9,38 +9,9 @@ from .update import change_active_object, simple_update
 from .utils import GizmoUtils
 
 
-class Handler:
-    @classmethod
-    def add_handler(cls):
-        if 'handler' not in cls.G_HandleData:
-            cls.G_HandleData['handler'] = bpy.types.SpaceView3D.draw_handler_add(
-                Draw3D().draw, (), 'WINDOW', 'POST_VIEW')
+class DrawPublic(GizmoUtils):
+    G_HandleData = {}  # Save draw Handle
 
-    @classmethod
-    def del_handler_text(cls):
-        if 'scale_text' in cls.G_HandleData:
-            bpy.types.SpaceView3D.draw_handler_remove(
-                cls.G_HandleData['scale_text'], 'WINDOW')
-            cls.G_HandleData.pop('scale_text')
-
-    @classmethod
-    def del_handler(cls):
-        data = bpy.data
-        if data.meshes.get(cls.G_NAME):
-            data.meshes.remove(data.meshes.get(cls.G_NAME))
-
-        if data.objects.get(cls.G_NAME):
-            data.objects.remove(data.objects.get(cls.G_NAME))
-
-        cls.del_handler_text()
-
-        if 'handler' in cls.G_HandleData:
-            bpy.types.SpaceView3D.draw_handler_remove(
-                cls.G_HandleData['handler'], 'WINDOW')
-            cls.G_HandleData.clear()
-
-
-class DrawPublic:
     @classmethod
     def draw_3d_shader(cls, pos, indices, color=None, *, shader_name='3D_UNIFORM_COLOR', draw_type='LINES'):
         shader = gpu.shader.from_builtin(shader_name)
@@ -56,18 +27,50 @@ class DrawPublic:
 
         batch.draw(shader)
 
+    @property
+    def draw_poll(self) -> bool:
+        if simple_update.timers_update_poll():
+            is_switch_obj = change_active_object.is_change_active_object(False)
+            if self.simple_deform_public_poll(bpy.context) and not is_switch_obj:
+                return True
+        return False
 
-class DrawText:
+
+class DrawText(DrawPublic):
     font_info = {
         'font_id': 0,
         'handler': None,
     }
+    text_key = 'handler_text'
 
     @classmethod
-    def draw_str(cls):
-        obj = bpy.context.object
-        font_id = cls.font_info['font_id']
+    def add_text_handler(cls):
+        key = cls.text_key
+        if key not in cls.G_HandleData:
+            cls.G_HandleData[key] = bpy.types.SpaceView3D.draw_handler_add(
+                DrawText().draw_text_handler, (), 'WINDOW', 'POST_PIXEL')
 
+    @classmethod
+    def del_text_handler(cls):
+        key = cls.text_key
+        if key in cls.G_HandleData:
+            bpy.types.SpaceView3D.draw_handler_remove(
+                cls.G_HandleData[key], 'WINDOW')
+            cls.G_HandleData.pop(key)
+
+    @classmethod
+    def obj_is_scale(cls) -> bool:
+        ob = bpy.context.object
+        scale_error = ob and (ob.scale != Vector((1, 1, 1)))
+        return scale_error
+
+    def draw_text_handler(self):
+        if self.draw_poll and self.obj_is_scale():
+            self.draw_scale_text()
+
+    def draw_scale_text(self):
+        obj = bpy.context.object
+        font_id = self.font_info['font_id']
         blf.position(font_id, 200, 80, 0)
         blf.size(font_id, 15, 72)
         blf.color(font_id, 1, 1, 1, 1)
@@ -85,7 +88,33 @@ class DrawText:
         blf.color(font_id, *color)
 
 
-class Draw3D(GizmoUtils, DrawPublic, DrawText, Handler):
+class DrawHandler(DrawText):
+    @classmethod
+    def add_handler(cls):
+        if 'handler' not in cls.G_HandleData:
+            cls.G_HandleData['handler'] = bpy.types.SpaceView3D.draw_handler_add(
+                Draw3D().draw, (), 'WINDOW', 'POST_VIEW')
+
+        cls.add_text_handler()
+
+    @classmethod
+    def del_handler(cls):
+        data = bpy.data
+        if data.meshes.get(cls.G_NAME):
+            data.meshes.remove(data.meshes.get(cls.G_NAME))
+
+        if data.objects.get(cls.G_NAME):
+            data.objects.remove(data.objects.get(cls.G_NAME))
+
+        if 'handler' in cls.G_HandleData:
+            bpy.types.SpaceView3D.draw_handler_remove(
+                cls.G_HandleData['handler'], 'WINDOW')
+            cls.G_HandleData.clear()
+
+        cls.del_text_handler()
+
+
+class Draw3D(DrawHandler):
 
     def draw(self):
         gpu.state.blend_set('ALPHA')
@@ -94,14 +123,10 @@ class Draw3D(GizmoUtils, DrawPublic, DrawText, Handler):
         gpu.state.blend_set('ALPHA')
         gpu.state.depth_test_set('ALWAYS')
 
-        context = bpy.context
-        if simple_update.timers_update_poll():
-            is_switch_obj = change_active_object.is_change_active_object(False)
-            if self.simple_deform_public_poll(context) and not is_switch_obj:
-                self.draw_3d(context)
+        if self.draw_poll:
+            self.draw_3d(bpy.context)
 
     def draw_3d(self, context):
-        self.draw_scale_text(self.obj)
         if not self.modifier_origin_is_available:
             self.draw_bound_box()
         elif self.simple_deform_show_gizmo_poll(context):
@@ -110,6 +135,8 @@ class Draw3D(GizmoUtils, DrawPublic, DrawText, Handler):
             self.draw_deform_mesh()
             self.draw_limits_line()
             self.draw_limits_bound_box()
+
+            self.draw_text_handler()
         elif self.simple_deform_show_bend_axis_witch_poll(context):
             self.draw_bound_box()
 
@@ -150,13 +177,5 @@ class Draw3D(GizmoUtils, DrawPublic, DrawText, Handler):
             if modifiers == mod_data and is_mat and is_limits:
                 self.draw_3d_shader(pos, indices, self.pref.deform_wireframe_color)
 
-    def draw_scale_text(self, ob):
-        scale_error = (ob.scale != Vector((1, 1, 1)))
-        if scale_error and ('scale_text' not in self.G_HandleData):
-            self.G_HandleData['scale_text'] = bpy.types.SpaceView3D.draw_handler_add(
-                self.draw_str, (), 'WINDOW', 'POST_PIXEL')
-        elif not scale_error:
-            self.del_handler_text()
-
     def draw_origin_error(self):
         ...

simple_deform_helper/utils.py

@@ -16,7 +16,6 @@ class PublicData:
 Classify each different type of data separately and cache it to avoid getting stuck due to excessive update frequency
     """
     G_CustomShape = {}  #
-    G_HandleData = {}  # Save draw Handle
 
     G_DeformDrawData = {}  # Save Deform Vertex And Indices,Update data only when updating deformation boxes
 
@@ -48,8 +47,8 @@ Classify each different type of data separately and cache it to avoid getting st
         'lock_y',
         'lock_z',
         'origin',
-        'show_expanded',
-        'show_in_editmode',
+        # 'show_expanded',
+        # 'show_in_editmode',
         'vertex_group',
     ]
 
@@ -242,12 +241,24 @@ class GizmoClassMethod(PublicTranslate):
         return number == abs(number)
 
     @classmethod
-    def link_obj_to_active_collection(cls, obj: 'bpy.types.Object'):
+    def _link_obj(cls, obj, link):
         context = bpy.context
         objects = context.view_layer.active_layer_collection.collection.objects
         if obj.name not in objects:
-            objects.link(
-                obj)
+            if link:
+                objects.link(
+                    obj)
+            else:
+                objects.unlink(
+                    obj)
+
+    @classmethod
+    def link_obj_to_active_collection(cls, obj: 'bpy.types.Object'):
+        cls._link_obj(obj, True)
+
+    @classmethod
+    def unlink_obj_to_active_collection(cls, obj: 'bpy.types.Object'):
+        cls._link_obj(obj, False)
 
     @classmethod
     def get_mesh_max_min_co(cls, obj: 'bpy.context.object') -> '[Vector,Vector]':