如何確定哪個監視器發生Swing鼠標事件？

Question

我在組件上有一個Java MouseListener來檢測鼠標按下。我怎麼知道鼠標按鍵發生在哪個監視器上？

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

我想要達到的效果是：當用戶在我的應用程序上按下鼠標按鍵，彈出一個窗口顯示一些信息，直到鼠標被釋放。我想確保此窗口位於用戶點擊的位置，但我需要調整當前屏幕上的窗口位置，以便可以看到整個窗口。

Answer 1

您可以從java.awt.GraphicsEnvironment獲取顯示信息。您可以使用它獲取有關您本地系統的信息。包括每臺顯示器的邊界。

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

也許e.getLocationOnScreen（）;將工作？它僅適用於java 1.6。

Answer 3

由於Java 1.6，你可以使用getLocationOnScreen，在以前的版本中，你必須得到該組件的生成該事件的位置：

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

你將不得不使用GraphicsEnvironment中類來獲取綁定的畫面。

Answer 4

豐富的回答幫我找到一個完整的解決方案：

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(); 
}