3
请能够从Icon/ImageIcon侦听MouseEvents
(在API没有实现任何通知器),而不脱离容器(JPanel
,JLabel
)收听或通过转化事件通过使用SwingUtilities,执行并到添加XxxListener
到普通的香草Icon
/ImageIcon
MouseEvents和图标/ ImageIcon的
编辑
类似的code (@pietblok),但也许没有回答我的问题,我不知道如果创建一个图形对象,BufferedImage的和的paintIcon是最后Ø f性质
(我看见几个similair代码,这是SSCCE形式)
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.util.Map;
import java.util.WeakHashMap;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
public class TestMouseAwareIcon {
public static class MouseAwareIcon extends MouseAdapter implements Icon {
private static final long serialVersionUID = 1L;
private int size = 80, halfSize = 40;
private final BufferedImage image;
private Map components = new WeakHashMap();
public MouseAwareIcon() {
super();
image = createImage();
}
@Override
public int getIconHeight() {
return image.getHeight();
}
@Override
public int getIconWidth() {
return image.getWidth();
}
@Override
public void mouseClicked(MouseEvent event) {
Object source = event.getSource();
if (source instanceof Component) {
Component component = (Component) source;
Point paintPoint = (Point) components.get(component);
if (paintPoint == null) {
System.out.println("unknown component");
} else {
Point mousePoint = event.getPoint();
int imageX = mousePoint.x - paintPoint.x;
int imageY = mousePoint.y - paintPoint.y;
if (imageX >= 0 && imageX < this.getIconWidth() && imageY >= 0
&& imageY < this.getIconHeight()) {
int argb = image.getRGB(imageX, imageY);
int alpha = (argb << 0) >>> 24;
int red = (argb << 8) >>> 24;
int green = (argb << 16) >>> 24;
int blue = (argb << 24) >>> 24;
System.out.println("Color clicked on "
+ component.getName() + ": " + alpha + ","
+ red + "," + green + "," + blue);
int fillX = halfSize * (imageX/halfSize);
int fillY = halfSize * (imageY/halfSize);
Graphics2D g2 = image.createGraphics();
g2.setColor(new Color(255 - red, 255 - green,
255 - blue, alpha));
g2.fill3DRect(fillX, fillY, halfSize, halfSize, true);
g2.dispose();
component.repaint();
} else {
System.out.println("Clicked outside image area");
}
}
}
}
@Override
public void paintIcon(Component component, Graphics g, int x, int y) {
((Graphics2D) g).drawImage(image, null, x, y);
if (!components.containsKey(component)) {
component.addMouseListener(this);
}
components.put(component, new Point(x, y));
}
private BufferedImage createImage() {
BufferedImage image1 = new BufferedImage(size, size,
BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = image1.createGraphics();
Color[] colors = new Color[]{Color.BLACK, Color.RED, Color.GREEN,
Color.BLUE};
int colorIndex = 0;
for (int x = 0; x < size; x += halfSize) {
for (int y = 0; y < size; y += halfSize) {
g2.setColor(colors[colorIndex]);
g2.fill3DRect(x, y, halfSize, halfSize, true);
colorIndex++;
}
}
g2.dispose();
return image1;
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
final JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel label = new JLabel(new MouseAwareIcon());
label.setName("label");
frame.getContentPane().add(label);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
只有两种方法来渲染Icon/ImageIcon,可以通过附加到支持图标渲染的组件(比如'JLabel'和/或'JButton'),或者将它绘制到自己的位置......所以不需要。 – MadProgrammer
为什么不使用未装饰的按钮? –