JTable이 표시 될 때 이벤트를 발생시키는 방법은 무엇입니까?

Question

JTable이 ComponentListener에 응답하지 않는지 알고 싶습니다. 나는 JTabbedPane의 탭 안에 JTable을 가지고 있고 JTable에 ComponentListener을 구현했기 때문에 테이블이 보이더라도 발동 할 수 있습니다. 그러나 응답이 없습니다! JTabbedPane도 응답하지 않습니다. JTable이 표시되는지 여부를 확인할 수있는 방법에 대한 아이디어?

Answer 1

JTable이 표시되는지 확인할 수있는 방법은 무엇입니까?

출처 : Determines if the component is visible in its window at the given screen location.

import java.awt.Component; 
import java.awt.Point; 
import java.awt.Window; 

import javax.swing.JRootPane; 
import javax.swing.SwingUtilities; 


/** 
* This class contains a collection of static utility methods for Swing. 
* 
* @author Heidi Rakels. 
*/ 
public class SwingUtil 
{ 
    /** 
    * <p> 
    * Determines if the component is visible in its window at the given screen location. 
    * </p> 
    * 
    * @param location A location on the screen. 
    * @param component A component in a window. 
    * @return  True if the component is visible in its window at the given screen location. 
    */ 
    public static boolean locationInComponentVisible(Point location, Component component) 
    { 

    // Get the root component in the window. 
    JRootPane rootPane = getRootPane(component); 
    if (rootPane != null) 
    { 
     Component rootComponent = rootPane.getContentPane(); 
     if (rootComponent != null) 
     { 
     // Get the location relative to this root component. 
     Point locationInRoot = new Point(location); 
     SwingUtilities.convertPointFromScreen(locationInRoot, rootComponent); 

     // Get the deepest visible component at the given location. 
     Component deepestComponent = SwingUtilities.getDeepestComponentAt(rootComponent, locationInRoot.x, locationInRoot.y); 
     if (deepestComponent != null) 
     { 
      boolean result = SwingUtilities.isDescendingFrom(deepestComponent, component); 
      return result; 
     } 
     } 
    } 

    return false; 

    } 
    /** 
    * Gets the root pane of the given component. 
    * 
    * @param component The component whose root pane is retrieved. 
    * @return   The root pane of the component. 
    */ 
    public static JRootPane getRootPane(Component component) 
    { 

    if (component instanceof JRootPane) { 
     return (JRootPane)component; 
    } 
    if (component.getParent() != null) { 
     return getRootPane(component.getParent()); 
    } 

    // Get the window of the component. 
    Window window = SwingUtilities.windowForComponent(component); 
    return getRootPane(window); 

    } 
}