半透明的正忙的Panel
package ui;
import javax.swing.JFrame;
public class MainFrame extends JFrame {
private static final long serialVersionUID = 1L;
BusyPanel glassPanel = new BusyPanel();
MainPanel panel = new MainPanel();
public MainFrame() {
getRootPane().setContentPane(panel);
setGlassPane(glassPanel);
glassPanel.start();
glassPanel.setVisible(false);
}
public void setBusy(boolean busy) {
if (busy) {
glassPanel.stop();
glassPanel.start();
glassPanel.setVisible(true);
} else {
glassPanel.stop();
glassPanel.setVisible(false);
}
}
}
package ui;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JPanel;
public class BusyPanel extends JPanel implements Runnable {
private static final long serialVersionUID = 1L;
private static final float PI = 3.1415f;
private String info;
private boolean stopped = true;
private int step;
private int radius;
private int barWidth;
private int barHeight;
private Color defaultColor;
private int startIndex = 0;
private int delay = 300;
private int darkBarCount = 5;
private int fontSize = 40;
private float alpha = 0.2f;
public BusyPanel() {
setOpaque(false);
setStep(15);
setRadius(150);
setDefaultColor(new Color(100, 100, 100));
setBarWidth((int) (radius * 0.6));
setBarHeight(10);
setDefaultColor(new Color(50, 50, 50));
info = "Default Information";
setFocusable(true);
handleEvent();
}
public void run() {
try {
while (!stopped) {
repaint();
Thread.sleep(delay);
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void start() {
if (!stopped) {
return;
}
stopped = false;
Thread thread = new Thread(this);
thread.start();
setCursor(new Cursor(Cursor.WAIT_CURSOR));
}
public void stop() {
stopped = true;
setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
}
/**
* Set the string that will be shown in the panel.
*
* @param str
* is will be shown.
*/
public void setString(String str) {
info = str;
}
public String getString() {
return info;
}
public void setStep(int step) {
if (step == this.step) {
return;
}
if (step < 4) {
step = 4;
}
this.step = step;
}
public int getStep() {
return step;
}
public int getRadius() {
return radius;
}
public int getBarWidth() {
return barWidth;
}
public void setBarWidth(int barWidth) {
if (barWidth == this.barWidth) {
return;
}
if (barWidth > this.radius) {
barWidth = this.radius;
}
this.barWidth = barWidth;
}
public int getBarHeight() {
return barHeight;
}
public void setBarHeight(int barHeight) {
if (barHeight == this.barHeight) {
return;
}
if (barHeight > 20) {
barHeight = 20;
}
this.barHeight = barHeight;
}
public void setRadius(int radius) {
if (radius == this.radius) {
return;
}
if (radius < 10) {
radius = 10;
}
this.radius = radius;
}
public int getDelay() {
return delay;
}
public void setDelay(int delay) {
if (delay == this.delay) {
return;
}
if (delay < 100) {
delay = 100;
}
this.delay = delay;
}
public int getDarkBarCount() {
return darkBarCount;
}
public void setDarkBarCount(int darkBarCount) {
if (darkBarCount == this.darkBarCount) {
return;
}
if (darkBarCount < 3) {
darkBarCount = 3;
}
this.darkBarCount = darkBarCount;
}
public void setDefaultColor(Color color) {
if (color.equals(this.defaultColor)) {
return;
}
this.defaultColor = color;
}
public int getFontSize() {
return fontSize;
}
public void setFontSize(int fontSize) {
if (fontSize == this.fontSize) {
return;
}
if (fontSize < 8) {
fontSize = 8;
}
this.fontSize = fontSize;
}
public float getAlpha() {
return alpha;
}
public void setAlpha(float alpha) {
if (alpha < 0.0f) {
alpha = 0.0f;
}
if (alpha > 1.0f) {
alpha = 1.0f;
}
this.alpha = alpha;
}
private void handleEvent() {
addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
Toolkit.getDefaultToolkit().beep();
}
});
}
@Override
public void setVisible(boolean v) {
if (v) {
requestFocus();
}
super.setVisible(v);
}
@Override
protected void paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
int width = getWidth();
int height = getHeight();
int centerx = width / 2;
int centery = height / 2;
// Draw the information string.
Font font = new Font(g2d.getFont().getName(), g2d.getFont().getStyle(),
fontSize);
g2d.setFont(font);
FontMetrics metrics = g2d.getFontMetrics();
int stringWidth = metrics.stringWidth(info);
int fontx = (width - stringWidth) / 2;
int fonty =(height / 2 - radius) - 20;
g2d.setColor(Color.RED);
g2d.drawString(info, fontx, fonty);
// Fill the semi-transparent background.
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
alpha));
g2d.setColor(g2d.getBackground().darker().darker().darker());
g2d.fillRect(0, 0, width, height);
// Draw scrolling bars.
g2d.translate(centerx, centery);
int startx = radius - barWidth;
int starty = -(barHeight / 2);
int arcWidth = barHeight;
float deltaAngle = PI * 2 / (float) step;
startIndex = (startIndex + 1) % step;
g2d.setColor(defaultColor);
for (int i = 0; i < step; ++i) {
g2d.fillRoundRect(startx, starty, barWidth, barHeight, arcWidth,
arcWidth);
g2d.rotate(deltaAngle);
}
Color color = defaultColor;
g2d.rotate(startIndex * deltaAngle);
for (int i = 0; i < darkBarCount; ++i) {
g2d.setColor(color);
g2d.fillRoundRect(startx, starty, barWidth, barHeight, arcWidth,
arcWidth);
g2d.rotate(deltaAngle);
color = color.darker();
}
}
}
