public void mousePressed(java.awt.event.MouseEvent e) {
isClick = true;
JButton b = (JButton) e.getSource();
// check to see if the target button can be moved
if (!solved && check(buttons.indexOf(b))) {
// hide the target button
b.setVisible(false);
// Figure out the bounds of the areas where source
// and target buttons are located
int menuOffset = getJMenuBar().getHeight();
dragSourceArea = b.getBounds();
dragTargetArea = ((JButton) buttons.get(hiddenIndex)).getBounds();
dragSourceArea.translate(0, menuOffset);
dragTargetArea.translate(0, menuOffset);
// setup the bounds of the panel to limit the locations on the drag
// layer
panelArea = new Rectangle(0, menuOffset, getJPanel().getWidth(), getJPanel().getHeight());
// Setup and show the drag button on the upper layer
getDragButton().setText(b.getText());
getDragButton().setBounds(dragSourceArea);
getDragButton().setVisible(true);
// Offset when repositioning the drag button later
cursorOffset = new Point(e.getX(), e.getY());
}
}
