Java swing：从另一帧中收听和重复的事件

Question

我有2帧：父和孩子。我想要执行以下操作： 当父框架被激活或取消消息时，子框架执行相同的操作。

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(); 
      } 
     } 

但是这会导致无限循环的闪烁。如果我删除toFront（），我不能将焦点切换到父框架。我只需要以某种方式正确地切换焦点。

监听器代码：

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(); 
} 

请帮助。提前致谢。

Answer 1

请勿使用2个JFrame。

相反，父级应该是JFrame，孩子应该是非模态的JDialog。在创建对话框时，您将框架指定为父级，并且默认情况下会获得此行为。

这是大多数应用程序设计的方式。