[英]Generate a double click mouse event in Java Swing
我正在尝试在 EDT 上生成双击鼠标事件,如下所示:
SwingUtilities.invokeLater(new Runnable() {
public void run() {
component.dispatchEvent(new MouseEvent(
component,
MouseEvent.MOUSE_CLICKED,
System.currentTimeMillis(),
InputEvent.BUTTON1_MASK,
x, y,
2, // click count
false
));
}
});
即使我将点击次数设置为 2,这似乎也不会发送双击事件。
有什么建议或例子吗?
考虑到:
final JButton clickTwiceButton = new JButton();
final JButton fireEventButton = new JButton();
听众:
clickTwiceButton.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
if (evt.getClickCount() == 2) {
JOptionPane.showMessageDialog(null, "Double clicked!");
}
}
});
fireEventButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
// Invoking later for no reason, just to simulate your code
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
clickTwiceButton.dispatchEvent(new MouseEvent(
fireEventButton,
MouseEvent.MOUSE_CLICKED,
1,
MouseEvent.BUTTON1,
0, 0,
2,
false
));
}
});
}
});
当我单击fireEventButton
, MouseEvent
被正确分派到clickTwiceButton
,对话框按预期显示。
所以,正如@Andrew指出的那样,问题似乎是要么将事件触发到错误的组件,要么使用已注册的MouseListener
/ MouseAdapter
代码来解决问题。
使用component.getMouseListeners()检查组件侦听器并调试处理其事件的代码。
方法非常简单。 你应该得到第一次点击的时间和第二次点击的时间,然后你可以在两者之间做一个条件。 方法代码如下:
private boolean state=false;
private long first_pressed;
JButton btnAdd = new JButton("add");
btnAdd.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
if(state==false) {
first_pressed=e.getWhen();
state=true;
}
if(first_pressed!=e.getWhen())
{
JOptionPane.showConfirmDialog(null,"doubel click","Click",JOptionPane.YES_NO_OPTION);
state=false;
}
}
});
public class TestMouseListener implements MouseListener {
private boolean leftClick;
private int clickCount;
private boolean doubleClick;
private boolean tripleClick;
public void mouseClicked(MouseEvent evt) {
if (evt.getButton()==MouseEvent.BUTTON1){
leftClick = true; clickCount = 0;
if(evt.getClickCount() == 2) doubleClick=true;
if(evt.getClickCount() == 3){
doubleClick = false;
tripleClick = true;
}
Integer timerinterval = (Integer)Toolkit.getDefaultToolkit().getDesktopProperty("awt.multiClickInterval");
Timer timer = new Timer(timerinterval, new ActionListener() {
public void actionPerformed(ActionEvent evt) {
if(doubleClick){
System.out.println("double click.");
clickCount++;
if(clickCount == 2){
doubleClick(); //your doubleClick method
clickCount=0;
doubleClick = false;
leftClick = false;
}
}else if (tripleClick) {
System.out.println("Triple Click.");
clickCount++;
if(clickCount == 3) {
tripleClick(); //your tripleClick method
clickCount=0;
tripleClick = false;
leftClick = false;
}
} else if(leftClick) {
System.out.println("single click.");
leftClick = false;
}
}
});
timer.setRepeats(false);
timer.start();
if(evt.getID()==MouseEvent.MOUSE_RELEASED) timer.stop();
}
}
public static void main(String[] argv) throws Exception {
JTextField component = new JTextField();
component.addMouseListener(new TestMouseListener());
JFrame f = new JFrame();
f.add(component);
f.setSize(300, 300);
f.setVisible(true);
component.addMouseListener(new TestMouseListener());
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.