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*
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* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
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*
* - Neither the name of Oracle or the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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*/
package javademo.swing.scroll.ScrollDemo;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Insets;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JToggleButton;
/*
* ScrollDemo.java requires these files:
* Rule.java
* Corner.java
* ScrollablePicture.java
* images/youngdad.jpeg
*/
@SuppressWarnings("serial")
public class ScrollDemo extends JPanel implements ItemListener
{
private Rule columnView;
private Rule rowView;
private JToggleButton isMetric;
private ScrollablePicture picture;
public ScrollDemo()
{
setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
// Get the image to use.
ImageIcon david = createImageIcon("images/youngdad.jpeg");
// Create the row and column headers.
columnView = new Rule(Rule.HORIZONTAL, true);
rowView = new Rule(Rule.VERTICAL, true);
if (david != null)
{
columnView.setPreferredWidth(david.getIconWidth());
rowView.setPreferredHeight(david.getIconHeight());
}
else
{
columnView.setPreferredWidth(320);
rowView.setPreferredHeight(480);
}
// Create the corners.
JPanel buttonCorner = new JPanel(); // use FlowLayout
isMetric = new JToggleButton("cm", true);
isMetric.setFont(new Font("SansSerif", Font.PLAIN, 11));
isMetric.setMargin(new Insets(2, 2, 2, 2));
isMetric.addItemListener(this);
buttonCorner.add(isMetric);
// Set up the scroll pane.
picture = new ScrollablePicture(david, columnView.getIncrement());
JScrollPane pictureScrollPane = new JScrollPane(picture);
pictureScrollPane.setPreferredSize(new Dimension(300, 250));
pictureScrollPane.setViewportBorder(BorderFactory.createLineBorder(Color.black));
pictureScrollPane.setColumnHeaderView(columnView);
pictureScrollPane.setRowHeaderView(rowView);
// Set the corners.
// In theory, to support internationalization you would change
// UPPER_LEFT_CORNER to UPPER_LEADING_CORNER,
// LOWER_LEFT_CORNER to LOWER_LEADING_CORNER, and
// UPPER_RIGHT_CORNER to UPPER_TRAILING_CORNER. In practice,
// bug #4467063 makes that impossible (in 1.4, at least).
pictureScrollPane.setCorner(JScrollPane.UPPER_LEFT_CORNER, buttonCorner);
pictureScrollPane.setCorner(JScrollPane.LOWER_LEFT_CORNER, new Corner());
pictureScrollPane.setCorner(JScrollPane.UPPER_RIGHT_CORNER, new Corner());
// Put it in this panel.
add(pictureScrollPane);
setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}
public void itemStateChanged(ItemEvent e)
{
if (e.getStateChange() == ItemEvent.SELECTED)
{
// Turn it to metric.
rowView.setIsMetric(true);
columnView.setIsMetric(true);
}
else
{
// Turn it to inches.
rowView.setIsMetric(false);
columnView.setIsMetric(false);
}
picture.setMaxUnitIncrement(rowView.getIncrement());
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path)
{
java.net.URL imgURL = ScrollDemo.class.getResource(path);
if (imgURL != null)
{
return new ImageIcon(imgURL);
}
else
{
System.err.println("Couldn't find file: " + path);
return null;
}
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI()
{
// Create and set up the window.
JFrame frame = new JFrame("ScrollDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create and set up the content pane.
JComponent newContentPane = new ScrollDemo();
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();
}
});
}
}