/**
* Create the GUI and show it. For thread safety, this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
// Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
// Create and set up the window.
JFrame frame = new JFrame("SelectionDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Set up the content pane.
SelectionDemo controller = new SelectionDemo();
controller.buildUI(frame.getContentPane(), createImageIcon(starFile));
// Display the window.
frame.pack();
frame.setVisible(true);
}
protected void paintComponent(Graphics g) {
super.paintComponent(g); // paints the background and image
// If currentRect exists, paint a box on top.
if (currentRect != null) {
// Draw a rectangle on top of the image.
g.setXORMode(Color.white); // Color of line varies
// depending on image colors
g.drawRect(rectToDraw.x, rectToDraw.y, rectToDraw.width - 1, rectToDraw.height - 1);
controller.updateLabel(rectToDraw);
}
}