@Override
public boolean mouseDown(Container container, Mouse.Button button, int x, int y) {
Sheet sheet = (Sheet)container;
Window owner = sheet.getOwner();
owner.moveToFront();
boolean consumed = super.mouseDown(container, button, x, y);
if (resizable && button == Mouse.Button.LEFT) {
Bounds resizeHandleBounds = resizeHandle.getBounds();