[英]How do I need to start a background thread using MouseListener?
我的代碼的想法是,當我的鼠標進入特定的jscrollpane時,它開始打印出它下面的rgb值。 我希望它在我的鼠標退出jscrollpane時停止打印出這些rgb值。
try{
String path = "C:\\Users\\Bernard\\Documents\\viking\\map\\provinces.bmp";
Image image = ImageIO.read(new File(path));
ImageIcon icon = new ImageIcon(image);
lblMap = new JLabel(icon);
JPanel jp = new JPanel();
jp.add(lblMap);
provincesPanel.add(jScrollPane1);
jScrollPane1.setViewportView(jp);
jScrollPane1.setAlignmentX(JFrame.RIGHT_ALIGNMENT);
jScrollPane1.addMouseListener(new MouseListener() {
@Override
public void mouseClicked(MouseEvent me) {
}
@Override
public void mousePressed(MouseEvent me) {
}
@Override
public void mouseReleased(MouseEvent me) {
}
@Override
public void mouseEntered(MouseEvent me) {
mapMuis =true;
SwingWorker sw = new SwingWorker<Color, Color>() {
@Override
protected Color doInBackground() {
while (mapMuis==true){
pointer = MouseInfo.getPointerInfo();
point = pointer.getLocation();
color = robot.getPixelColor((int) point.getX(), (int) point.getY());
System.out.println("Color at: " + point.getX() + "," + point.getY() + " is: " + color);
return color;
}
return color;
}
};
}
@Override
public void mouseExited(MouseEvent me) {
mapMuis=false;
}
});
然而,當我的鼠標進入jscrollpane時,我根本沒有輸出。
感謝您的時間。
解決方案:我chlk了MouseListener並實現了MouseMotion:
jScrollPane1.addMouseMotionListener(new MouseMotionListener() {
@Override
public void mouseDragged(MouseEvent me) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseMoved(MouseEvent me) {
pointer = MouseInfo.getPointerInfo();
point = pointer.getLocation();
color = robot.getPixelColor((int) point.getX(), (int) point.getY());
System.out.println("Color at: " + point.getX() + "," + point.getY() + " is: " + color); //To change body of generated methods, choose Tools | Templates.
}
});
您可以簡單地使用MouseMotionListener
和mouseMoved
事件來實現相同的結果,而無需任何Thread
s
有關詳細信息,請參閱如何編寫鼠標 - 運動監聽器
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