PointerProperty and Changing Meshes?

Question

I'm working on free Addons named "Arc Blend" . I'm stuck a little...

My question is:

I have a PointerProperty group on my Mesh. And I add new property as mesh data. But I don't know how I can Handle this problem: I want to display just other meshes. How i can reach my PropertyGroup's queue(order) and automatically change my mesh For instance: 1.th is "Cube" to "Suzanne" 2.nd is "Suzanne" to "Other Mesh" using "display boolean icon"

def proxy_display_upd(self,context): 

         
    if self.proxy_display == False: bpy.context.object.data =bpy.data.meshes["Cube"]

    elif self.proxy_display== True: bpy.context.object.data = bpy.data.meshes["Suzanne"]

proxy_display=bpy.props.BoolProperty(default=False,description="Display in Viewport",update=proxy_display_upd)
 

Answer 1

Ok I found a solution for this:

def return_one_time(mesh, active_idx, prop_api):
    """Returning once per elements"""
    AB_list = mesh.mesh_list

    for i in AB_list:
        if i.proxy_ui_index != active_idx:
            exec(f"i.{prop_api}= False")
    return None


def proxy_display_upd(self, context):

    if self.proxy_display == True:
        return_one_time(self.id_data, self.proxy_ui_index, "proxy_display")

    selected_objects = bpy.context.selected_objects

    if len(selected_objects) > 1:
        try:
            for i in range(0, len(selected_objects)):
                o = []

                disp_list = list(
                    bpy.data.meshes[f"{bpy.context.active_object.proxy_item_obj.name}"].mesh_list)

                for j in disp_list:

                    o.append(j.proxy_display)

                    true_count = sum(o)

                if true_count == 1:

                    selected_objects[i].data = bpy.data.meshes[self.proxy_item.name]

                # if proxy_display is off than active objects change to first object
                elif true_count == 0:

                    selected_objects[i].data = bpy.data.meshes[
                        f"{bpy.context.active_object.proxy_item_obj.name}"]

        except AttributeError:
            pass

    elif len(selected_objects) <= 1:

        try:
            for i in range(0, len(bpy.data.meshes[f"{bpy.context.active_object.proxy_item_obj.name}"].mesh_list)):
                o = []

                disp_list = list(
                    bpy.data.meshes[f"{bpy.context.active_object.proxy_item_obj.name}"].mesh_list)

                # All list item append to "o"list and count the "True"
                for j in disp_list:

                    o.append(j.proxy_display)

                    true_count = sum(o)

                # if proxy_display is on than selected objects change
                if true_count == 1:

                    bpy.context.object.data = bpy.data.meshes[self.proxy_item.name]

                # if proxy_display is off than active objects change to first object
                elif true_count == 0:

                    bpy.context.object.data = bpy.data.meshes[
                        f"{bpy.context.active_object.proxy_item_obj.name}"]

        except AttributeError:
            pass

    return None
```