Java：忽略单击双击？ [英] Java : ignore single click on double click?

问题描述

任何人都可以想到一个很好的方法来忽略Java中双击的单击？

我希望对每个行为都有不同的行为：

• 单击点击点击十字准线


• 双击选择屏幕上的对象，但应该在点击点上绘制十字准线

...任何人都可以想办法做到这一点？某些定时器设置可能吗？一个想法赞赏： - ）

<免责声明... ...是的，我知道我犯了一个最可恶的可用性/ UI人造皮肤。 < /免责声明>

编辑＃2：

由于计时器的延迟令人生闷 - 我放弃了这个解决方案，并使用中间点击进行选择，而不是双击...

编辑：

感谢 cgull - 这是什么我能够提出你的确认，没有简单的方法来做到这一点（请注意，如果我设置了定时器< 200奇怪的赛车在点击和定时器之间，但只要我把它设置为价值> 200件事情只是peachy）：

  public void mouseClicked（MouseEvent e）{
 System.out.println （点击（+ e.getX（）+：+ e.getY（）+））; 
 if（e.getClickCount（）== 2）{
 System.out.println（and it is a double click！）; 
 wasDoubleClick = true; 
} else {
整数timerinterval =（整数）
 Toolkit.getDefaultToolkit（）。getDesktopProperty（
awt.multiClickInterval）; 
 timer = new Timer（timerinterval.intValue（），new ActionListener（）{
 public void actionPerformed（ActionEvent evt）{
 if（wasDoubleClick）{
 wasDoubleClick = false; / reset flag 
} else {
 System.out.println（and it a a click click！）; 
} 
} 
}）; 
 timer.setRepeats（false）; 
 timer.start（）; 
} 
} 
  

解决方案

您需要在MouseAdapter的重写mouseClicked（）方法中设置一个Timer，以检测两次点击之间的时间间隔。通过查询
Toolkit.getDefaultToolkit（）。getDesktopProperty（awt.multiClickInterval）可以找到默认的时间间隔（以ms为单位）。如果在定时器到期之前检测到另一个鼠标点击，则双击一次，否则一旦定时器到期，您可以单击进行处理。

can anyone think of a good way to ignore the single click that comes with a double-click in Java ?

I'm looking to have different behaviors for each such that:

• single-click paints crosshairs on the click point
• double-click selects an object on the screen, but should not paint crosshairs on the click point

... can anyone think of a way to do this ? Some sort of timer set-up maybe ? An ideas appreciated :-)

<disclaimer> ...and yes, I know I'm committing a most heinous usability / UI faux pas. </disclaimer>

EDIT #2:

Even though this works the delay due to the timer is maddening - I'm abandoning this solution, and using middle-click for selection instead of double-click...

EDIT:

Thanks cgull - this is what I was able to come up with given your confirmation that there's no easy way to do this (note that if I set the timer < 200 odd racing is seen between the click & the timer, but as long as I set this to a value > 200 things work just peachy) :

public void mouseClicked(MouseEvent e) {
    System.out.println( "Click at (" + e.getX() + ":" + e.getY() + ")" );
    if (e.getClickCount() == 2) {  
        System.out.println( "  and it's a double click!");
        wasDoubleClick = true;
    }else{
        Integer timerinterval = (Integer) 
          Toolkit.getDefaultToolkit().getDesktopProperty(
                      "awt.multiClickInterval");
        timer = new Timer(timerinterval.intValue(), new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                if (wasDoubleClick) {
                    wasDoubleClick = false; // reset flag
                } else {
                    System.out.println( "  and it's a simple click!");
                }
            }    
        });
        timer.setRepeats(false);
        timer.start();
    }
}

解决方案

Indeed you'll need to set up a Timer in your overridden mouseClicked() method of your MouseAdapter to detect the time interval between the two clicks. The default interval in ms can be found by querying Toolkit.getDefaultToolkit().getDesktopProperty("awt.multiClickInterval"). If another mouse click is detected before the timer expires, then you have a double-click, else once the timer expires, you can process the single-click.

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