如何确定哪个监视器发生Swing鼠标事件？

Question

我在组件上有一个Java MouseListener来检测鼠标按下。我怎么知道鼠标按键发生在哪个监视器上？

@Override 
public void mousePressed(MouseEvent e) { 
    // I want to make something happen on the monitor the user clicked in 
} 

我想要达到的效果是：当用户在我的应用程序上按下鼠标按键，弹出一个窗口显示一些信息，直到鼠标被释放。我想确保此窗口位于用户点击的位置，但我需要调整当前屏幕上的窗口位置，以便可以看到整个窗口。

Answer 1

您可以从java.awt.GraphicsEnvironment获取显示信息。您可以使用它获取有关您本地系统的信息。包括每台显示器的边界。

Point point = event.getPoint(); 

GraphicsEnvironment e 
    = GraphicsEnvironment.getLocalGraphicsEnvironment(); 

GraphicsDevice[] devices = e.getScreenDevices(); 

Rectangle displayBounds = null; 

//now get the configurations for each device 
for (GraphicsDevice device: devices) { 

    GraphicsConfiguration[] configurations = 
     device.getConfigurations(); 
    for (GraphicsConfiguration config: configurations) { 
     Rectangle gcBounds = config.getBounds(); 

     if(gcBounds.contains(point)) { 
      displayBounds = gcBounds; 
     } 
    } 
} 

if(displayBounds == null) { 
    //not found, get the bounds for the default display 
    GraphicsDevice device = e.getDefaultScreenDevice(); 

    displayBounds =device.getDefaultConfiguration().getBounds(); 
} 
//do something with the bounds 
... 

Answer 2

也许e.getLocationOnScreen（）;将工作？它仅适用于java 1.6。

Answer 3

由于Java 1.6，你可以使用getLocationOnScreen，在以前的版本中，你必须得到该组件的生成该事件的位置：

Point loc; 
// in Java 1.6 
loc = e.getLocationOnScreen(); 
// in Java 1.5 or previous 
loc = e.getComponent().getLocationOnScreen(); 

你将不得不使用GraphicsEnvironment中类来获取绑定的画面。

Answer 4

丰富的回答帮我找到一个完整的解决方案：

public void mousePressed(MouseEvent e) { 
    final Point p = e.getPoint(); 
    SwingUtilities.convertPointToScreen(p, e.getComponent()); 
    Rectangle bounds = getBoundsForPoint(p); 
    // now bounds contains the bounds for the monitor in which mouse pressed occurred 
    // ... do more stuff here 
} 


private static Rectangle getBoundsForPoint(Point point) { 
    for (GraphicsDevice device : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()) { 
     for (GraphicsConfiguration config : device.getConfigurations()) { 
      final Rectangle gcBounds = config.getBounds(); 
      if (gcBounds.contains(point)) { 
       return gcBounds; 
      } 
     } 
    } 
    // if point is outside all monitors, default to default monitor 
    return GraphicsEnvironment.getLocalGraphicsEnvironment().getMaximumWindowBounds(); 
}