Java swing：從另一幀中收聽和重複的事件

Question

我有2幀：父和孩子。我想要執行以下操作： 當父框架被激活或取消消息時，子框架執行相同的操作。

private void attachListeners() 
    { 
     if (parentFrame != null) 
     { 
      parentFrame.addComponentListener(this); 
      parentFrame.addWindowListener(new ViewEventAdapter(this)); 
     } 
    @Override 
     public void viewActivated() 
     {    
      // show it when the parent is activated 
      if (!childFrame.isVisible()) 
      { 
         childFrame.setVisible(true); 
         parentFrame.toFront(); 
      } 
     } 

但是這會導致無限循環的閃爍。如果我刪除toFront（），我不能將焦點切換到父框架。我只需要以某種方式正確地切換焦點。

監聽器代碼：

public class ViewEventAdapter implements WindowListener, InternalFrameListener 
{ 
    private MyViewListener listener = null; 


    public ViewEventAdapter(MiaViewListener inListener) 
    { 
     listener = inListener; 
    } 


    @Override 
    public void windowActivated(WindowEvent inE) 
    { 
     listener.viewActivated(); 
    } 


    @Override 
    public void windowClosed(WindowEvent inE) 
    { 
     listener.viewClosed(); 
    } 


    @Override 
    public void windowClosing(WindowEvent inE) 
    { 
     listener.viewClosing(); 
    } 


    @Override 
    public void windowDeactivated(WindowEvent inE) 
    { 
     listener.viewDeactivated(); 
    } 


    @Override 
    public void windowDeiconified(WindowEvent inE) 
    { 
     listener.viewDeiconified(); 
    } 


    @Override 
    public void windowIconified(WindowEvent inE) 
    { 
     listener.viewIconified(); 
    } 


    @Override 
    public void windowOpened(WindowEvent inE) 
    { 
     listener.viewOpened(); 
    } 


    @Override 
    public void internalFrameActivated(InternalFrameEvent inE) 
    { 
     listener.viewActivated(); 
    } 


    @Override 
    public void internalFrameClosed(InternalFrameEvent inE) 
    { 
     listener.viewClosed(); 
    } 


    @Override 
    public void internalFrameClosing(InternalFrameEvent inE) 
    { 
     listener.viewClosing(); 
    } 


    @Override 
    public void internalFrameDeactivated(InternalFrameEvent inE) 
    { 
     listener.viewDeactivated(); 
    } 


    @Override 
    public void internalFrameDeiconified(InternalFrameEvent inE) 
    { 
     listener.viewDeiconified(); 
    } 


    @Override 
    public void internalFrameIconified(InternalFrameEvent inE) 
    { 
     listener.viewIconified(); 
    } 


    @Override 
    public void internalFrameOpened(InternalFrameEvent inE) 
    { 
     listener.viewOpened(); 
    } 
} 

public interface MyViewListener 
{ 
    /** 
    * Called when a view is activated 
    */ 
    public void viewActivated(); 

    /** 
    * Called when a view is closed 
    */ 
    public void viewClosed(); 

    /** 
    * Called when a view is closing 
    */ 
    public void viewClosing(); 

    /** 
    * Called when a view is deactivated 
    */ 
    public void viewDeactivated(); 

    /** 
    * Called when a view is deiconified 
    */ 
    public void viewDeiconified(); 

    /** 
    * Called when a view is iconified 
    */ 
    public void viewIconified(); 

    /** 
    * Called when a view is opened 
    */ 
    public void viewOpened(); 
} 

請幫助。提前致謝。

Answer 1

請勿使用2個JFrame。

相反，父級應該是JFrame，孩子應該是非模態的JDialog。在創建對話框時，您將框架指定爲父級，並且默認情況下會獲得此行爲。

這是大多數應用程序設計的方式。