VkDesignerUtil.setCapture(panel);
groupingBoundsWidget.setPopupPosition(event.getClientX() - panel.getAbsoluteLeft() + Window.getScrollLeft(), event.getClientY() - panel.getAbsoluteTop() + Window.getScrollTop());
groupingBoundsWidget.show();
selectedWidgets.clear();
}}, MouseDownEvent.getType());
panel.addDomHandler(new MouseMoveHandler(){
@Override
public void onMouseMove(MouseMoveEvent event) {
groupingBoundsWidget.setHeight(event.getClientY() - groupingBoundsWidget.getAbsoluteTop() + "px");
groupingBoundsWidget.setWidth(event.getClientX() - groupingBoundsWidget.getAbsoluteLeft() + "px");
}}, MouseMoveEvent.getType());