Fix button states on properties refresh

VSTPlugin.cpp

@@ -162,6 +162,11 @@ void VSTPlugin::unloadEffect()
 	unloadLibrary();
 }
 
+bool VSTPlugin::isEditorOpen()
+{
+	return editorWidget ? true : false;
+}
+
 void VSTPlugin::openEditor()
 {
 	if (effect && !editorWidget) {

headers/VSTPlugin.h

@@ -99,6 +99,8 @@ class VSTPlugin : public QObject {
 	obs_audio_data *process(struct obs_audio_data *audio);
 	bool            openInterfaceWhenActive = false;
 
+	bool isEditorOpen();
+
 public slots:
 	void openEditor();
 	void closeEditor();

obs-vst.cpp

@@ -237,20 +237,23 @@ static void fill_out_plugins(obs_property_t *list)
 
 static obs_properties_t *vst_properties(void *data)
 {
-	obs_properties_t *props = obs_properties_create();
-	obs_property_t *  list  = obs_properties_add_list(
+	VSTPlugin *       vstPlugin = (VSTPlugin *)data;
+	obs_properties_t *props     = obs_properties_create();
+	obs_property_t *  list      = obs_properties_add_list(
                 props, "plugin_path", PLUG_IN_NAME, OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
 
 	fill_out_plugins(list);
 
 	obs_properties_add_button(props, OPEN_VST_SETTINGS, OPEN_VST_TEXT, open_editor_button_clicked);
-
 	obs_properties_add_button(props, CLOSE_VST_SETTINGS, CLOSE_VST_TEXT, close_editor_button_clicked);
-	obs_property_set_visible(obs_properties_get(props, CLOSE_VST_SETTINGS), false);
 
-	obs_properties_add_bool(props, OPEN_WHEN_ACTIVE_VST_SETTINGS, OPEN_WHEN_ACTIVE_VST_TEXT);
+	if (vstPlugin->isEditorOpen()) {
+		obs_property_set_visible(obs_properties_get(props, OPEN_VST_SETTINGS), false);
+	} else {
+		obs_property_set_visible(obs_properties_get(props, CLOSE_VST_SETTINGS), false);
+	}
 
-	UNUSED_PARAMETER(data);
+	obs_properties_add_bool(props, OPEN_WHEN_ACTIVE_VST_SETTINGS, OPEN_WHEN_ACTIVE_VST_TEXT);
 
 	return props;
 }