Simple GUI animation using JFrame
I overrode the setVisible() function in my JFrame. All it does is continually grows the frame or shrinks the frame until it is the size I want. This makes for a simple animation. My problem with this though, is that it is choppy, not smooth, and doesn't work well if the frame is moved. Is there a way I can do this cleaner so it is more fluid and smooth?
/**
* Sets this window visible and also displays an effect when the window becomes
* visible
开发者_如何学编程* @param visible True if the window should be visible, false otherwise
*/
@Override
public void setVisible(final boolean visible)
{
final int effectSpeed = 5;
if(effect == false)
{
super.setVisible(visible);
}
if(effect && visible)
{
super.setVisible(visible);
//run the window opening effect
new Thread(new Runnable()
{
public void run()
{
for (int i = 0; i <= parent.getHeight(); i = i + effectSpeed)
{
setSize(getPreferredSize().width, i);
try
{
Thread.sleep(1);
}
catch (Exception e)
{
}
}
}
}).start();
}
else if(effect && visible == false)
{
//run the window closing effect
new Thread(new Runnable()
{
public void run()
{
for (int i = parent.getHeight(); i >= 0; i = i - effectSpeed)
{
setSize(getPreferredSize().width, i);
try
{
Thread.sleep(1);
}
catch (Exception e)
{
}
}
DataWindow.super.setVisible(visible);
}
}).start();
}
}
You should use Swing Timers for this, instead of creating your own threads.
maybe wrong asked question, nobody know, nice example from Old.Java.Sun.Forum, how to use javax.swing.Timer
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Color;
import java.awt.AlphaComposite;
import javax.swing.*;
import javax.swing.UIManager.LookAndFeelInfo;
public class ButtonTest {
private JFrame frame;
private JButton opaqueButton1;
private JButton opaqueButton2;
private SoftJButton softButton1;
private SoftJButton softButton2;
private Timer alphaChanger;
public void createAndShowGUI() {
opaqueButton1 = new JButton("Opaque Button");
opaqueButton2 = new JButton("Opaque Button");
softButton1 = new SoftJButton("Transparent Button");
softButton2 = new SoftJButton("Transparent Button");
opaqueButton1.setBackground(Color.GREEN);
softButton1.setBackground(Color.GREEN);
frame = new JFrame();
frame.getContentPane().setLayout(new java.awt.GridLayout(2, 2, 10, 10));
frame.add(opaqueButton1);
frame.add(softButton1);
frame.add(opaqueButton2);
frame.add(softButton2);
frame.setSize(700, 300);
frame.setLocation(150, 100);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
alphaChanger = new Timer(30, new ActionListener() {
private float incrementer = -.03f;
@Override
public void actionPerformed(ActionEvent e) {
float newAlpha = softButton1.getAlpha() + incrementer;
if (newAlpha < 0) {
newAlpha = 0;
incrementer = -incrementer;
} else if (newAlpha > 1f) {
newAlpha = 1f;
incrementer = -incrementer;
}
softButton1.setAlpha(newAlpha);
softButton2.setAlpha(newAlpha);
}
});
alphaChanger.start();
Timer uiChanger = new Timer(3500, new ActionListener() {
private final LookAndFeelInfo[] laf = UIManager.getInstalledLookAndFeels();
private int index = 1;
@Override
public void actionPerformed(ActionEvent e) {
try {
UIManager.setLookAndFeel(laf[index].getClassName());
SwingUtilities.updateComponentTreeUI(frame);
opaqueButton1.setText(laf[index].getClassName());
softButton1.setText(laf[index].getClassName());
} catch (Exception exc) {
exc.printStackTrace();
}
index = (index + 1) % laf.length;
}
});
uiChanger.start();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new ButtonTest().createAndShowGUI();
}
});
}
private static class SoftJButton extends JButton {
private static final JButton lafDeterminer = new JButton();
private static final long serialVersionUID = 1L;
private boolean rectangularLAF;
private float alpha = 1f;
SoftJButton() {
this(null, null);
}
SoftJButton(String text) {
this(text, null);
}
SoftJButton(String text, Icon icon) {
super(text, icon);
setOpaque(false);
setFocusPainted(false);
}
public float getAlpha() {
return alpha;
}
public void setAlpha(float alpha) {
this.alpha = alpha;
repaint();
}
@Override
public void paintComponent(java.awt.Graphics g) {
java.awt.Graphics2D g2 = (java.awt.Graphics2D) g;
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha));
if (rectangularLAF && isBackgroundSet()) {
Color c = getBackground();
g2.setColor(c);
g.fillRect(0, 0, getWidth(), getHeight());
}
super.paintComponent(g2);
}
@Override
public void updateUI() {
super.updateUI();
lafDeterminer.updateUI();
rectangularLAF = lafDeterminer.isOpaque();
}
}
}
精彩评论