JAVA 如何通过 mousePosition 从 JTabbedPane 获取 Tab

Question

刚遇到这个问题。将 SSCE 带在身边！ :-)

我想通过 double-clicking 在其 "Title" 获取选项卡内容（组件）。

我给你这个 SSCE，在这种情况下，我想在 tab-menu-title 之前 double-clicking 收到 JLabel。（绿色选项卡）我想接收 JLabel "I am label 2!"。

有代码：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SSCE extends JFrame {

private JTabbedPane tab;
public SSCE() {
    tab = new JTabbedPane();
    this.add(tab);
    JLabel p = new JLabel("I am label 1!");
    tab.addTab("Red tab",p );

    JLabel p2 = new JLabel("I am label 2!");
    tab.addTab("Green tab",p2 );

    JLabel p3 = new JLabel("I am label 3!");
    tab.addTab("Blue tab",p3 );

    JLabel p4 = new JLabel("I am label 4!");
    tab.addTab("Cyan tab", p4 );

    tab.addMouseListener(new MouseAdapter(){
        @Override
        public void mousePressed(MouseEvent e) {
            if ( e.getClickCount() > 1) {
                Component c = tab.getComponentAt(new Point(e.getX(), e.getY()));
                //TODO Find the right label and print it! :-)
                JLabel innerComponent = (JLabel) c;
                System.out.println("Found:" + innerComponent.getText());
            }
        }
    });
}

    public static void main(final String[] args) throws Exception {
       SSCE start = new SSCE();
       start.setDefaultCloseOperation(EXIT_ON_CLOSE);
       start.setVisible(true);
       start.setSize(new Dimension(450,300));

    }
}

有办法做到吗？我尝试了很多东西。但没有运气:-( 非常感谢您的帮助！

我想做的是为 JTabbedPane 实现功能。所以当您 double-click 在 "Title" 时，它将打开一个对话框，其中包含您 [=33] 的选项卡内容=]编于。

我知道如何创建对话框等等。但是我不知道如何从标题上的 mouse-clicking 获取组件。

Answer 1

Component c = tab.getComponentAt(new Point(e.getX(), e.getY()));

您不想在您点击的地方获取组件。您想从所选选项卡中获取组件。

代码应该是：

//int index = tab.getSelectedTab(); // oops, this was a typo
int index = tab.getSelectedIndex();
Component c = tab.getComponentAt( index );

Answer 2

how to get the component just from the mouse-clicking on the title.

我猜你在找 JTabbedPane#indexAtLocation(int, int)?

Returns the tab index corresponding to the tab whose bounds intersect the specified location. Returns -1 if no tab intersects the location.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SSCE2 extends JFrame {

  private JTabbedPane tab;
  public SSCE2() {
    tab = new JTabbedPane();
    this.add(tab);
    JLabel p = new JLabel("I am label 1!");
    tab.addTab("Red tab", p);

    JLabel p2 = new JLabel("I am label 2!");
    tab.addTab("Green tab", p2);

    JLabel p3 = new JLabel("I am label 3!");
    tab.addTab("Blue tab", p3);

    JLabel p4 = new JLabel("I am label 4!");
    tab.addTab("Cyan tab", p4);

    tab.addMouseListener(new MouseAdapter() {
      @Override
      public void mousePressed(MouseEvent e) {
        if (e.getClickCount() > 1) {
          //Component c = tab.getComponentAt(new Point(e.getX(), e.getY()));
          //TODO Find the right label and print it! :-)
          int index = tab.indexAtLocation(e.getX(), e.getY());
          if (index >= 0) {
            Component c = tab.getComponentAt(index);
            if (c instanceof JLabel) {
              JLabel innerComponent = (JLabel) c;
              System.out.println("Found:" + innerComponent.getText());
            }
          }
        }
      }
    });
  }

  public static void main(final String[] args) throws Exception {
    JFrame start = new SSCE2();
    start.setDefaultCloseOperation(EXIT_ON_CLOSE);
    start.setVisible(true);
    start.setSize(new Dimension(450, 300));

  }
}

JAVA 如何通过 mousePosition 从 JTabbedPane 获取 Tab

JAVA How to get Tab from JTabbedPane by mousePosition

java

swing

jtabbedpane

mouselistener