Message Dialog demo
/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski
ISBN: 1-893115-78-X
Publisher: APress
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Polygon;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class MessagePopup {
public static void main(String args[]) {
JFrame frame = new JFrame("Message Popup");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton button = new JButton("Pop it");
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
Component source = (Component) actionEvent.getSource();
/*
* // String msg = "this is a really long message this is a
* really long message this is a really long message this is a
* really long message this is a really long message this is a
* really long message this is a really long message"; String
* msg = " <html>this is a really long message <br> this is a
* really long message this is a really long message this is a
* really long message this is a really long message this is a
* really long message this is a really long message";
* JOptionPane.showMessageDialog(source, msg); JOptionPane
* optionPane = OptionPaneUtils.getNarrowOptionPane(72);
* optionPane.setMessage(msg);
* optionPane.setMessageType(JOptionPane.INFORMATION_MESSAGE);
* JDialog dialog = optionPane.createDialog(source, "Width 72");
* dialog.show(); int selection =
* OptionPaneUtils.getSelection(optionPane);
* JOptionPane.showMessageDialog(source, msg); String
* multiLineMsg[] = {"Hello", "World"};
* JOptionPane.showMessageDialog(source, multiLineMsg);
*
* Object complexMsg[] = {"Above Message", new
* DiamondIcon(Color.red), new JButton ("Hello"), new JSlider(),
* new DiamondIcon(Color.blue), "Below Message"};
* JOptionPane.showInputDialog(source, complexMsg); JOptionPane
* optionPane = new JOptionPane(); JSlider slider =
* OptionPaneUtils.getSlider(optionPane);
* optionPane.setMessage(new Object[] {"Select a value: " ,
* slider});
* optionPane.setMessageType(JOptionPane.QUESTION_MESSAGE);
* optionPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
* JDialog dialog = optionPane.createDialog(source, "My
* Slider"); dialog.show(); System.out.println ("Input: " +
* optionPane.getInputValue());
*/
JOptionPane optionPane = new JOptionPane();
optionPane.setMessage("I got an icon and a text label");
optionPane.setMessageType(JOptionPane.INFORMATION_MESSAGE);
Icon icon = new DiamondIcon(Color.blue);
JButton jButton = OptionPaneUtils.getButton(optionPane, "OK",
icon);
optionPane.setOptions(new Object[] { jButton });
JDialog dialog = optionPane.createDialog(source,
"Icon/Text Button");
dialog.show();
}
};
button.addActionListener(actionListener);
Container contentPane = frame.getContentPane();
contentPane.add(button, BorderLayout.SOUTH);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
class DiamondIcon implements Icon {
private Color color;
private boolean selected;
private int width;
private int height;
private Polygon poly;
private static final int DEFAULT_WIDTH = 10;
private static final int DEFAULT_HEIGHT = 10;
public DiamondIcon(Color color) {
this(color, true, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
public DiamondIcon(Color color, boolean selected) {
this(color, selected, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
public DiamondIcon(Color color, boolean selected, int width, int height) {
this.color = color;
this.selected = selected;
this.width = width;
this.height = height;
initPolygon();
}
private void initPolygon() {
poly = new Polygon();
int halfWidth = width / 2;
int halfHeight = height / 2;
poly.addPoint(0, halfHeight);
poly.addPoint(halfWidth, 0);
poly.addPoint(width, halfHeight);
poly.addPoint(halfWidth, height);
}
public int getIconHeight() {
return height;
}
public int getIconWidth() {
return width;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
g.setColor(color);
g.translate(x, y);
if (selected) {
g.fillPolygon(poly);
} else {
g.drawPolygon(poly);
}
g.translate(-x, -y);
}
}
final class OptionPaneUtils {
private OptionPaneUtils() {
}
public static JOptionPane getNarrowOptionPane(int maxCharactersPerLineCount) {
// Our inner class definition
class NarrowOptionPane extends JOptionPane {
int maxCharactersPerLineCount;
NarrowOptionPane(int maxCharactersPerLineCount) {
this.maxCharactersPerLineCount = maxCharactersPerLineCount;
}
public int getMaxCharactersPerLineCount() {
return maxCharactersPerLineCount;
}
}
return new NarrowOptionPane(maxCharactersPerLineCount);
}
public static JButton getButton(final JOptionPane optionPane, String text,
Icon icon) {
final JButton button = new JButton(text, icon);
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
// Return current text label, instead of argument to method
optionPane.setValue(button.getText());
}
};
button.addActionListener(actionListener);
return button;
}
public static JSlider getSlider(final JOptionPane optionPane) {
JSlider slider = new JSlider();
slider.setMajorTickSpacing(10);
slider.setPaintTicks(true);
slider.setPaintLabels(true);
ChangeListener changeListener = new ChangeListener() {
public void stateChanged(ChangeEvent changeEvent) {
JSlider theSlider = (JSlider) changeEvent.getSource();
if (!theSlider.getValueIsAdjusting()) {
optionPane.setInputValue(new Integer(theSlider.getValue()));
}
}
};
slider.addChangeListener(changeListener);
return slider;
}
public static int getSelection(JOptionPane optionPane) {
// Default return value, signals nothing selected
int returnValue = JOptionPane.CLOSED_OPTION;
// Get selected Value
Object selectedValue = optionPane.getValue();
System.out.println(selectedValue);
// If none, then nothing selected
if (selectedValue != null) {
Object options[] = optionPane.getOptions();
if (options == null) {
// default buttons, no array specified
if (selectedValue instanceof Integer) {
returnValue = ((Integer) selectedValue).intValue();
}
} else {
// Array of option buttons specified
for (int i = 0, n = options.length; i < n; i++) {
if (options[i].equals(selectedValue)) {
returnValue = i;
break; // out of for loop
}
}
}
}
return returnValue;
}
}
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