Best way to update objects after preference change?

  • Hello,

    in my plugin, I have a PrefsDialogObject. After the user changed something in those preferences, I need to notify all my plugin objects in all open documents. What's the best way of doing this?


  • I'd go for SpecialEventAdd.

  • That would work... if NodeDatas would receive CoreMessages ;-)

  • Ah yea, my bad. You were talking about objects, not GUI.
    Maybe implement a Scenehook that notifies all objects in question.

  • Yeah, I thought about a SceneHook, too. But if that scene hook would only iterate over the objects in the document and send a message to each object of the desired type, I can simply do that from within the PrefsDialogObject.

    I was hoping for some message-based approach that would spare me more code :D

  • Maybe the SDK Team has an idea(@r_gigante )? If I could just have all object in the scene receive a message like MSG_MYPREFSHAVECHANGED, that would be nice.

  • Oh wait, I think I found a way. In case anybody else wants to know, here it is...

    In the PrefsDialogObject:

    Bool MyPrefsDialog::SetDParameter(GeListNode *node, const DescID &id,const GeData &t_data,DESCFLAGS_SET &flags)
    	BaseContainer* bc = MyPlugin::GetPreferences();
    	if (!bc)
    		SUPER::SetDParameter(node, id, t_data, flags);
    	switch (id[0].id)
    		// If PREFS_MYPLUGIN_SOMEVALUE was changed, store value and notify plugin objects in all open documents.
    			bc->SetInt32(PREFS_MYPLUGIN_SOMEVALUE, t_data.GetInt32());
    			flags |= DESCFLAGS_SET::PARAM_SET;
    			// Iterate open documents
    			for (BaseDocument *doc = GetFirstDocument(); doc; doc = doc->GetNext())
    				// Send broadcast message to each document, use unique ID
    				doc->MultiMessage(MULTIMSG_ROUTE::BROADCAST, MyPlugin::UNIQUE_ID_PREFS, nullptr);
    			return true;
    	return SUPER::SetDParameter(node, id, t_data, flags);

    And then, in the plugin object:

    Bool MyPluginObject::Message(GeListNode *node, Int32 type, void *data)
    	if (type == MyPlugin::UNIQUE_ID_PREFS)
    		GePrint("Aha! My prefs have changed!"_s);
    		return true;
    	return SUPER::Message(node, type, data);