Merge pull request #86044 from KoBeWi/can't_add_if_can't_add

Disable Add button when theme item name is empty

editor/plugins/theme_editor_plugin.cpp

@@ -2287,8 +2287,11 @@ VBoxContainer *ThemeTypeEditor::_create_item_list(Theme::DataType p_data_type) {
 	item_add_edit->connect("text_submitted", callable_mp(this, &ThemeTypeEditor::_item_add_lineedit_cbk).bind(p_data_type, item_add_edit));
 	Button *item_add_button = memnew(Button);
 	item_add_button->set_text(TTR("Add"));
+	item_add_button->set_disabled(true);
 	item_add_hb->add_child(item_add_button);
 	item_add_button->connect("pressed", callable_mp(this, &ThemeTypeEditor::_item_add_cbk).bind(p_data_type, item_add_edit));
+	item_add_edit->set_meta("button", item_add_button);
+	item_add_edit->connect("text_changed", callable_mp(this, &ThemeTypeEditor::_update_add_button).bind(item_add_edit));
 
 	return items_list;
 }
@@ -2850,6 +2853,11 @@ void ThemeTypeEditor::_add_default_type_items() {
 	ur->commit_action();
 }
 
+void ThemeTypeEditor::_update_add_button(const String &p_text, LineEdit *p_for_edit) {
+	Button *button = Object::cast_to<Button>(p_for_edit->get_meta("button"));
+	button->set_disabled(p_text.strip_edges().is_empty());
+}
+
 void ThemeTypeEditor::_item_add_cbk(int p_data_type, Control *p_control) {
 	LineEdit *le = Object::cast_to<LineEdit>(p_control);
 	if (le->get_text().strip_edges().is_empty()) {
@@ -2895,6 +2903,7 @@ void ThemeTypeEditor::_item_add_cbk(int p_data_type, Control *p_control) {
 	ur->commit_action();
 
 	le->set_text("");
+	_update_add_button("", le);
 }
 
 void ThemeTypeEditor::_item_add_lineedit_cbk(String p_value, int p_data_type, Control *p_control) {

editor/plugins/theme_editor_plugin.h

@@ -382,6 +382,7 @@ class ThemeTypeEditor : public MarginContainer {
 	void _add_type_button_cbk();
 	void _add_default_type_items();
 
+	void _update_add_button(const String &p_text, LineEdit *p_for_edit);
 	void _item_add_cbk(int p_data_type, Control *p_control);
 	void _item_add_lineedit_cbk(String p_value, int p_data_type, Control *p_control);
 	void _item_override_cbk(int p_data_type, String p_item_name);