按下选项卡按钮时更改SelectedIndex

问题描述 投票:0回答:1

我有一个带有自定义选项卡的JTabbedPane,它显示文件名,后跟一个按钮。按下按钮时,我想关闭该选项卡。我的第一个想法是(希望)当我点击按钮时,它会首先切换到该选项卡,然后我就可以关闭该索引处的选项卡。然而事实并非如此。我正在寻找一种方法来检索按钮所在的选项卡索引,然后我可以关闭该选项卡。我尝试过研究并想出了indexOfComponent,但我不确定如何在我的情况下使用它。我的标签是动态创建的,因此我将内容存储在矢量中,创建JPanels,然后根据所选索引显示当前信息。 (tab 0将包含vec [0],tab 1 = vec [1]等内部的所有组件)。

我的TextEdit类设置如下:

public class TextEdit extends JTabbedPane {
  private Vector<JTextArea> vec; // User can make and edit files
  private Vector<JPanel> tabPanel; // Panel that has a JLabel for fileName and JButton to close file
  private Vector<JLabel> absolutePath; // Path to which file will be saved

  public TextEdit() {
    // Sets up actionlisteners, initializes variables, etc
  }

  protected void AddTab(String fileName) {
    JPanel panel = new JPanel; // Where textarea will be
    panel.setLayout(new GridLayout(0,1));
    JTextArea ta = new JTextArea();
    JScrollPane sp = new JScrollPane(ta);
    panel.add(sp);

    JPanel tp = new JPanel(); // The tab panel
    tp.setLayout(new FlowLayout(FlowLayout.LEFT, 10, 2));
    JLabel label = new JLabel(fileName);
    JButton button = new JButton("X");
    button.addActionListener(CloseOne); // My Action that will close the file
    tp.add(label);
    tp.add(button);

    this.addTab(fileName, panel); // Sets the text area into the tab
    this.setTabComponentAt(this.getSelectedIndex, tp); // Sets the tab to the fileName and button

    vec.add(ta); // Add textarea to vector for future use
    tabPanel.add(tp); // Add the tabpanel for future use. this is where the button is, I need to setSelectedIndex to the tab that the button resides onclick

}

text editor.Java

Action CloseOne = new AbstractAction("CloseOne") {
  @Override
  public void actionPerformed(ActionEvent e) {
    // This is where I need to set the selected tab to the tab in which the button was pressed.
  }
};

TextEditor类是我的所有操作,并持有TextEdit(标签等所在的位置)。

我的textedit有方法来设置和获取所选索引。

回到indexOfComponent,我需要指定我正在使用的组件,但是,我的组件是动态添加的,我必须弄清楚selectedindex进入vector或JPanels甚至使用它。或者我错过了什么?有什么建议?

java swing button jtabbedpane selectedindex
1个回答
0
投票

在AddTab方法中,将actionCommand设置为关闭按钮,作为新添加的选项卡的索引,如下所示

JButton button = new JButton("X");
button.setActionCommand( "" + tabPanel.size() );
button.addActionListener(CloseOne);

在TextEdit类中添加removeTabComponentAtmethod

  public void removeTabComponentAt( int index ) {
       vec.removeElementAt(index );  
       tabPanel.removeElementAt(index );
       this.removeTabAt( index );

  }

在“关闭”操作中,获取单击按钮的索引

Action CloseOne = new AbstractAction("CloseOne") {

    public Component getTextEdit ( Component comp) {
         if( comp instanceof TextEdit ) {
            return ( TextEdit  ) comp;
         } 
         if( comp.getParent() != null ) {
              return getTextEdit ( comp.getParent() );
         }  else {
              return null;
         }
    }
   @Override
    public void actionPerformed(ActionEvent e) {

         String indexStr = e.getActionCommand();
         int index=-1; 
         try {
              index = Integer.parseInt( indexStr );

         } catch( NumberFormatException ex ) {
         }
         if( index > -1 ) {
            TextEdit textEdit = getTextEdit( ( Component ) e.getSource() ) ;
              if( textEdit  != null ) {
                 textEdit.removeTabComponentAt( index );
              }
         }
    }
};
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