[GenericTilePolygonEditor] Add support for Pan and Magnify gestures.

editor/plugins/tiles/tile_data_editors.cpp

@@ -523,6 +523,21 @@ void GenericTilePolygonEditor::_base_control_gui_input(Ref<InputEvent> p_event)
 	xform.set_origin(base_control->get_size() / 2 + panning);
 	xform.set_scale(Vector2(editor_zoom_widget->get_zoom(), editor_zoom_widget->get_zoom()));
 
+	Ref<InputEventPanGesture> pan_gesture = p_event;
+	if (pan_gesture.is_valid()) {
+		panning += pan_gesture->get_delta() * 8;
+		drag_last_pos = Vector2();
+		button_center_view->set_disabled(panning.is_zero_approx());
+		accept_event();
+	}
+
+	Ref<InputEventMagnifyGesture> magnify_gesture = p_event;
+	if (magnify_gesture.is_valid()) {
+		editor_zoom_widget->set_zoom(editor_zoom_widget->get_zoom() * magnify_gesture->get_factor());
+		_zoom_changed();
+		accept_event();
+	}
+
 	Ref<InputEventMouseMotion> mm = p_event;
 	if (mm.is_valid()) {
 		if (drag_type == DRAG_TYPE_DRAG_POINT) {