gtk_widget_set_events(top->window, GDK_ALL_EVENTS_MASK & ~GDK_POINTER_MOTION_HINT_MASK);

...
static Point s_mousepos;

Point Ctrl::GetMouseInfo(GdkWindow *win, GdkModifierType& mod)
{
#if GTK_CHECK_VERSION(3, 20, 0)
	GdkDisplay *display = gdk_window_get_display (win);
	GdkDevice *pointer = gdk_seat_get_pointer (gdk_display_get_default_seat (display));
	double x, y;
	gdk_window_get_device_position_double (win, pointer, &x, &y, &mod);
	return s_mousepos; //return Point((int)SCL(x), (int)SCL(y));
#else
	gint x, y;
	gdk_window_get_pointer(win, &x, &y, &mod);
	return Point(SCL(x), SCL(y));
#endif
}

void Ctrl::AddEvent(gpointer user_data, int type, const Value& value, GdkEvent *event)
{
	if(Events.GetCount() > 50000)
		return;
	GEvent& e = Events.AddTail();
	e.windowid = (uint32)(uintptr_t)user_data;
	e.type = type;
	e.value = value;
	GdkModifierType mod;
	e.mousepos = GetMouseInfo(gdk_get_default_root_window(), mod);
	if(event->type == GDK_MOTION_NOTIFY){
		GdkEventMotion *mevent = (GdkEventMotion *)event;
		e.mousepos = s_mousepos = Point(SCL(mevent->x_root), SCL(mevent->y_root));
	}
	e.state = (mod & ~(GDK_BUTTON1_MASK|GDK_BUTTON2_MASK|GDK_BUTTON3_MASK)) | MouseState;
	e.count = 1;
	e.event = NULL;
#if GTK_CHECK_VERSION(3, 22, 0)
	GdkDevice *d = gdk_event_get_source_device(event);
	int s=d?gdk_device_get_source(d):0;
	if(d && ((s==GDK_SOURCE_PEN) || (s==GDK_SOURCE_TOUCHSCREEN))) {
		e.pen = true;
		e.pen_barrel = MouseState & GDK_BUTTON3_MASK;
		double *axes = NULL;
		switch(event->type){
			case GDK_BUTTON_PRESS:
				gdk_window_set_event_compression(((GdkEventButton *)event)->window, false);
			case GDK_2BUTTON_PRESS:
			case GDK_3BUTTON_PRESS:
				axes = ((GdkEventButton *)event)->axes;
				break;
			case GDK_BUTTON_RELEASE:
				gdk_window_set_event_compression(((GdkEventButton *)event)->window, true);
				axes = ((GdkEventButton *)event)->axes;
				break;
			case GDK_MOTION_NOTIFY:{
				GdkEventMotion *mevent = (GdkEventMotion *)event;
				e.mousepos = s_mousepos = Point(SCL(mevent->x_root), SCL(mevent->y_root));
				axes = ((GdkEventMotion *)event)->axes;
				break;
			}
		}
		if(axes) {
			if(!gdk_device_get_axis(d, axes, GDK_AXIS_PRESSURE, &e.pen_pressure)) e.pen_pressure=Null;
			if(!gdk_device_get_axis(d, axes, GDK_AXIS_ROTATION, &e.pen_rotation)) e.pen_rotation=Null;
			if(!gdk_device_get_axis(d, axes, GDK_AXIS_XTILT, &e.pen_tilt.x)) e.pen_tilt.x=Null;
			if(!gdk_device_get_axis(d, axes, GDK_AXIS_YTILT, &e.pen_tilt.y)) e.pen_tilt.y=Null;
		}
	}
#endif
...

...

bool Ctrl::ProcessEvent0(bool *quit, bool fetch)
{
	ASSERT(IsMainThread());
	bool r = false;
	if(IsWaitingEvent0(fetch)) {
		while(Events.GetCount() > 1) { // GEvent compression (coalesce autorepeat, mouse moves/wheel, configure)
			GEvent& a = Events[0];
			GEvent& b = Events[1];
			if(b.type == a.type && a.windowid == b.windowid && a.state == b.state) {
				if(a.type == GDK_KEY_PRESS && a.value == b.value)
					b.count += a.count;
			    else
			    if(a.type == GDK_SCROLL)
			        b.value = (int)b.value + (int)a.value;
				else
//				if(findarg(a.type, GDK_MOTION_NOTIFY, GDK_CONFIGURE) < 0)
				if(findarg(a.type, GDK_CONFIGURE) < 0) // *** HERE: We cannot drop GDK_MOTION_NOTIFY events
					break;
				Events.DropHead();

...