Mega Code Archive
Moves an image of Duke around within a layered pane in response to mouse motion events
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/*
*
* Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
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* which is disparaging to Sun.
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* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
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import java.awt.Color;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
public class LayeredPaneDemo extends JPanel implements ActionListener, MouseMotionListener {
private String[] layerStrings = { "Yellow (0)", "Magenta (1)", "Cyan (2)", "Red (3)", "Green (4)" };
private Color[] layerColors = { Color.yellow, Color.magenta, Color.cyan, Color.red, Color.green };
private JLayeredPane layeredPane;
private JLabel dukeLabel;
private JCheckBox onTop;
private JComboBox layerList;
// Action commands
private static String ON_TOP_COMMAND = "ontop";
private static String LAYER_COMMAND = "layer";
// Adjustments to put Duke's toe at the cursor's tip.
private static final int XFUDGE = 40;
private static final int YFUDGE = 57;
public LayeredPaneDemo() {
setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
// Create and load the duke icon.
final ImageIcon icon = new ImageIcon("yourFile.gif");
// Create and set up the layered pane.
layeredPane = new JLayeredPane();
layeredPane.setPreferredSize(new Dimension(300, 310));
layeredPane.setBorder(BorderFactory.createTitledBorder("Move the Mouse to Move Duke"));
layeredPane.addMouseMotionListener(this);
// This is the origin of the first label added.
Point origin = new Point(10, 20);
// This is the offset for computing the origin for the next label.
int offset = 35;
// Add several overlapping, colored labels to the layered pane
// using absolute positioning/sizing.
for (int i = 0; i < layerStrings.length; i++) {
JLabel label = createColoredLabel(layerStrings[i], layerColors[i], origin);
layeredPane.add(label, new Integer(i));
origin.x += offset;
origin.y += offset;
}
// Create and add the Duke label to the layered pane.
dukeLabel = new JLabel(icon);
if (icon != null) {
dukeLabel.setBounds(15, 225, icon.getIconWidth(), icon.getIconHeight());
} else {
System.err.println("Duke icon not found; using black square instead.");
dukeLabel.setBounds(15, 225, 30, 30);
dukeLabel.setOpaque(true);
dukeLabel.setBackground(Color.BLACK);
}
layeredPane.add(dukeLabel, new Integer(2), 0);
// Add control pane and layered pane to this JPanel.
add(Box.createRigidArea(new Dimension(0, 10)));
add(createControlPanel());
add(Box.createRigidArea(new Dimension(0, 10)));
add(layeredPane);
}
private JLabel createColoredLabel(String text, Color color, Point origin) {
JLabel label = new JLabel(text);
label.setVerticalAlignment(JLabel.TOP);
label.setHorizontalAlignment(JLabel.CENTER);
label.setOpaque(true);
label.setBackground(color);
label.setForeground(Color.black);
label.setBorder(BorderFactory.createLineBorder(Color.black));
label.setBounds(origin.x, origin.y, 140, 140);
return label;
}
// Create the control pane for the top of the frame.
private JPanel createControlPanel() {
onTop = new JCheckBox("Top Position in Layer");
onTop.setSelected(true);
onTop.setActionCommand(ON_TOP_COMMAND);
onTop.addActionListener(this);
layerList = new JComboBox(layerStrings);
layerList.setSelectedIndex(2); // cyan layer
layerList.setActionCommand(LAYER_COMMAND);
layerList.addActionListener(this);
JPanel controls = new JPanel();
controls.add(layerList);
controls.add(onTop);
controls.setBorder(BorderFactory.createTitledBorder("Choose Duke's Layer and Position"));
return controls;
}
// Make Duke follow the cursor.
public void mouseMoved(MouseEvent e) {
dukeLabel.setLocation(e.getX() - XFUDGE, e.getY() - YFUDGE);
}
public void mouseDragged(MouseEvent e) {
} // do nothing
public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand();
if (ON_TOP_COMMAND.equals(cmd)) {
if (onTop.isSelected())
layeredPane.moveToFront(dukeLabel);
else
layeredPane.moveToBack(dukeLabel);
} else if (LAYER_COMMAND.equals(cmd)) {
int position = onTop.isSelected() ? 0 : 1;
layeredPane.setLayer(dukeLabel, layerList.getSelectedIndex(), position);
}
}
public static void main(String[] args) {
JFrame frame = new JFrame("LayeredPaneDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create and set up the content pane.
JComponent newContentPane = new LayeredPaneDemo();
newContentPane.setOpaque(true); // content panes must be opaque
frame.setContentPane(newContentPane);
// Display the window.
frame.pack();
frame.setVisible(true);
}
}
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