ColorChooser Demo 2 : Color Chooser « Swing JFC « Java
ColorChooser Demo 2
/* From http://java.sun.com/docs/books/tutorial/index.html */
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import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import javax.swing.border.Border;
import javax.swing.colorchooser.AbstractColorChooserPanel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/*
* ColorChooserDemo2.java is a 1.4 application that requires these files:
* CrayonPanel.java images/red.gif images/yellow.gif images/green.gif
* images/blue.gif
*/
public class ColorChooserDemo2 extends JPanel implements ActionListener,
ChangeListener {
public JLabel banner;
public JColorChooser tcc;
public ColorChooserDemo2() {
super(new BorderLayout());
//Set up banner to use as custom preview panel
banner = new JLabel("Welcome to the Tutorial Zone!", JLabel.CENTER);
banner.setForeground(Color.yellow);
banner.setBackground(Color.blue);
banner.setOpaque(true);
banner.setFont(new Font("SansSerif", Font.BOLD, 24));
banner.setPreferredSize(new Dimension(100, 65));
JPanel bannerPanel = new JPanel(new BorderLayout());
bannerPanel.add(banner, BorderLayout.CENTER);
bannerPanel.setBorder(BorderFactory.createTitledBorder("Banner"));
//Set up color chooser for setting background color
JPanel panel = new JPanel(); //use FlowLayout
JButton bcc = new JButton("Show Color Chooser...");
bcc.addActionListener(this);
panel.add(bcc);
panel.setBorder(BorderFactory
.createTitledBorder("Choose Background Color"));
//Set up color chooser for setting text color
tcc = new JColorChooser();
tcc.getSelectionModel().addChangeListener(this);
tcc.setBorder(BorderFactory.createTitledBorder("Choose Text Color"));
//Remove the preview panel
tcc.setPreviewPanel(new JPanel());
//Override the chooser panels with our own
AbstractColorChooserPanel panels[] = { new CrayonPanel() };
tcc.setChooserPanels(panels);
tcc.setColor(banner.getForeground());
add(bannerPanel, BorderLayout.PAGE_START);
add(panel, BorderLayout.CENTER);
add(tcc, BorderLayout.PAGE_END);
}
public void actionPerformed(ActionEvent e) {
Color newColor = JColorChooser.showDialog(ColorChooserDemo2.this,
"Choose Background Color", banner.getBackground());
if (newColor != null) {
banner.setBackground(newColor);
}
}
public void stateChanged(ChangeEvent e) {
Color newColor = tcc.getColor();
banner.setForeground(newColor);
}
/**
* 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("ColorChooserDemo2");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
JComponent newContentPane = new ColorChooserDemo2();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
class CrayonPanel extends AbstractColorChooserPanel implements ActionListener {
JToggleButton redCrayon;
JToggleButton yellowCrayon;
JToggleButton greenCrayon;
JToggleButton blueCrayon;
public void updateChooser() {
Color color = getColorFromModel();
if (Color.red.equals(color)) {
redCrayon.setSelected(true);
} else if (Color.yellow.equals(color)) {
yellowCrayon.setSelected(true);
} else if (Color.green.equals(color)) {
greenCrayon.setSelected(true);
} else if (Color.blue.equals(color)) {
blueCrayon.setSelected(true);
}
}
protected JToggleButton createCrayon(String name, Border normalBorder) {
JToggleButton crayon = new JToggleButton();
crayon.setActionCommand(name);
crayon.addActionListener(this);
//Set the image or, if that's invalid, equivalent text.
ImageIcon icon = createImageIcon("images/" + name + ".gif");
if (icon != null) {
crayon.setIcon(icon);
crayon.setToolTipText("The " + name + " crayon");
crayon.setBorder(normalBorder);
} else {
crayon.setText("Image not found. This is the " + name + " button.");
crayon.setFont(crayon.getFont().deriveFont(Font.ITALIC));
crayon.setHorizontalAlignment(JButton.HORIZONTAL);
crayon.setBorder(BorderFactory.createLineBorder(Color.BLACK));
}
return crayon;
}
protected void buildChooser() {
setLayout(new GridLayout(0, 1));
ButtonGroup boxOfCrayons = new ButtonGroup();
Border border = BorderFactory.createEmptyBorder(4, 4, 4, 4);
redCrayon = createCrayon("red", border);
boxOfCrayons.add(redCrayon);
add(redCrayon);
yellowCrayon = createCrayon("yellow", border);
boxOfCrayons.add(yellowCrayon);
add(yellowCrayon);
greenCrayon = createCrayon("green", border);
boxOfCrayons.add(greenCrayon);
add(greenCrayon);
blueCrayon = createCrayon("blue", border);
boxOfCrayons.add(blueCrayon);
add(blueCrayon);
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = CrayonPanel.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
public void actionPerformed(ActionEvent e) {
Color newColor = null;
String command = ((JToggleButton) e.getSource()).getActionCommand();
if ("green".equals(command))
newColor = Color.green;
else if ("red".equals(command))
newColor = Color.red;
else if ("yellow".equals(command))
newColor = Color.yellow;
else if ("blue".equals(command))
newColor = Color.blue;
getColorSelectionModel().setSelectedColor(newColor);
}
public String getDisplayName() {
return "Crayons";
}
public Icon getSmallDisplayIcon() {
return null;
}
public Icon getLargeDisplayIcon() {
return null;
}
}
