_video_vsync = !_video_vsync;

				VideoDriver::GetInstance()->ToggleVsync(_video_vsync);

				this->SetWidgetLoweredState(WID_GO_VIDEO_VSYNC_BUTTON, _video_vsync);

				this->SetWidgetDirty(WID_GO_VIDEO_VSYNC_BUTTON);

				break;

			case WID_GO_BASE_SFX_VOLUME:

			case WID_GO_BASE_MUSIC_VOLUME: {

				byte &vol = (widget == WID_GO_BASE_MUSIC_VOLUME) ? _settings_client.music.music_vol : _settings_client.music.effect_vol;

				if (ClickVolumeSliderWidget(this->GetWidget<NWidgetBase>(widget)->GetCurrentRect(), pt, vol)) {

	 */

	void OnInvalidateData(int data = 0, bool gui_scope = true) override

	{

		if (!gui_scope) return;

		this->SetWidgetLoweredState(WID_GO_FULLSCREEN_BUTTON, _fullscreen);

		this->SetWidgetLoweredState(WID_GO_VIDEO_ACCEL_BUTTON, _video_hw_accel);

#ifndef __APPLE__

		this->SetWidgetLoweredState(WID_GO_VIDEO_VSYNC_BUTTON, _video_vsync);

		this->SetWidgetDisabledState(WID_GO_VIDEO_VSYNC_BUTTON, !_video_hw_accel);

#endif