GlassPane Intercepts Event : GlassPane « Swing Components « Java
GlassPane Intercepts Event
/*
* Copyright (c) 2007, Romain Guy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* 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 documentation and/or other materials provided
* with the distribution.
* * Neither the name of the TimingFramework project nor 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, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.LinearGradientPaint;
import java.awt.Paint;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseMotionAdapter;
import javax.swing.JComponent;
/**
*
* @author Romain Guy
*/
public class GlassPaneInterceptEvent extends javax.swing.JFrame {
private static final int MAX_DELAY = 300;
private ProgressGlassPane glassPane;
public GlassPaneInterceptEvent() {
initComponents();
setGlassPane(glassPane = new ProgressGlassPane());
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
private void initComponents() {
javax.swing.JButton buttonDownload;
javax.swing.JLabel jLabel1;
javax.swing.JScrollPane jScrollPane1;
jLabel1 = new javax.swing.JLabel();
buttonDownload = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
filesTable = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Glass Pane Painting");
setResizable(false);
jLabel1.setText("Pick a file for download");
buttonDownload.setText("Start Download");
buttonDownload.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
buttonDownloadActionPerformed(evt);
}
});
filesTable.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{"aerith.png", "/www/progx/images/", "PNG", "5/17/2006"},
{"blog.html", "/www/progx", "HTML", "3/1/2006"},
{"index.html", "/www/progx", "HTML", "9/12/2006"},
{"pictures.zip", "/www/progx", "ZIP", "10/8/2006"}
},
new String [] {
"Name", "Path", "Type", "Date"
}
));
jScrollPane1.setViewportView(filesTable);
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(buttonDownload))
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(jLabel1))
.add(layout.createSequentialGroup()
.addContainerGap()
.add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 513, Short.MAX_VALUE))))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(20, 20, 20)
.add(jLabel1)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 275, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(buttonDownload)
.addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
setBounds((screenSize.width-553)/2, (screenSize.height-394)/2, 553, 394);
}// </editor-fold>//GEN-END:initComponents
private void buttonDownloadActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_buttonDownloadActionPerformed
getGlassPane().setVisible(true);
startDownloadThread();
}//GEN-LAST:event_buttonDownloadActionPerformed
private void startDownloadThread() {
Thread downloader = new Thread(new Runnable() {
public void run() {
int i = 0;
do {
try {
Thread.sleep(30 + (int) (Math.random() * MAX_DELAY));
} catch (InterruptedException ex) {
// who cares here?
}
i += (int) (Math.random() * 5);
glassPane.setProgress(i);
} while (i < 100);
glassPane.setVisible(false);
glassPane.setProgress(0);
}
});
downloader.start();
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new GlassPaneInterceptEvent().setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JTable filesTable;
// End of variables declaration//GEN-END:variables
}
/*
* Copyright (c) 2007, Romain Guy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* 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 documentation and/or other materials provided
* with the distribution.
* * Neither the name of the TimingFramework project nor 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, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
*
* @author Romain Guy
*/
class ProgressGlassPane extends JComponent {
private static final int BAR_WIDTH = 200;
private static final int BAR_HEIGHT = 10;
private static final Color TEXT_COLOR = new Color(0x333333);
private static final Color BORDER_COLOR = new Color(0x333333);
private static final float[] GRADIENT_FRACTIONS = new float[] {
0.0f, 0.499f, 0.5f, 1.0f
};
private static final Color[] GRADIENT_COLORS = new Color[] {
Color.GRAY, Color.DARK_GRAY, Color.BLACK, Color.GRAY
};
private static final Color GRADIENT_COLOR2 = Color.WHITE;
private static final Color GRADIENT_COLOR1 = Color.GRAY;
private String message = "Downloading file...";
private int progress = 0;
/** Creates a new instance of ProgressGlassPane */
public ProgressGlassPane() {
// blocks all user input
addMouseListener(new MouseAdapter() { });
addMouseMotionListener(new MouseMotionAdapter() { });
addKeyListener(new KeyAdapter() { });
setFocusTraversalKeysEnabled(false);
addComponentListener(new ComponentAdapter() {
public void componentShown(ComponentEvent evt) {
requestFocusInWindow();
}
});
setBackground(Color.WHITE);
setFont(new Font("Default", Font.BOLD, 16));
}
public int getProgress() {
return progress;
}
public void setProgress(int progress) {
int oldProgress = this.progress;
this.progress = progress;
// computes the damaged area
FontMetrics metrics = getGraphics().getFontMetrics(getFont());
int w = (int) (BAR_WIDTH * ((float) oldProgress / 100.0f));
int x = w + (getWidth() - BAR_WIDTH) / 2;
int y = (getHeight() - BAR_HEIGHT) / 2;
y += metrics.getDescent() / 2;
w = (int) (BAR_WIDTH * ((float) progress / 100.0f)) - w;
int h = BAR_HEIGHT;
repaint(x, y, w, h);
}
@Override
protected void paintComponent(Graphics g) {
// enables anti-aliasing
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// gets the current clipping area
Rectangle clip = g.getClipBounds();
// sets a 65% translucent composite
AlphaComposite alpha = AlphaComposite.SrcOver.derive(0.65f);
Composite composite = g2.getComposite();
g2.setComposite(alpha);
// fills the background
g2.setColor(getBackground());
g2.fillRect(clip.x, clip.y, clip.width, clip.height);
// centers the progress bar on screen
FontMetrics metrics = g.getFontMetrics();
int x = (getWidth() - BAR_WIDTH) / 2;
int y = (getHeight() - BAR_HEIGHT - metrics.getDescent()) / 2;
// draws the text
g2.setColor(TEXT_COLOR);
g2.drawString(message, x, y);
// goes to the position of the progress bar
y += metrics.getDescent();
// computes the size of the progress indicator
int w = (int) (BAR_WIDTH * ((float) progress / 100.0f));
int h = BAR_HEIGHT;
// draws the content of the progress bar
Paint paint = g2.getPaint();
// bar's background
Paint gradient = new GradientPaint(x, y, GRADIENT_COLOR1,
x, y + h, GRADIENT_COLOR2);
g2.setPaint(gradient);
g2.fillRect(x, y, BAR_WIDTH, BAR_HEIGHT);
// actual progress
gradient = new LinearGradientPaint(x, y, x, y + h,
GRADIENT_FRACTIONS, GRADIENT_COLORS);
g2.setPaint(gradient);
g2.fillRect(x, y, w, h);
g2.setPaint(paint);
// draws the progress bar border
g2.drawRect(x, y, BAR_WIDTH, BAR_HEIGHT);
g2.setComposite(composite);
}
}
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