2

私がしたいのは、JTree の編集中に、編集ボックスの外側をクリックすると編集をコミットしたいということです。 tree.setInvokesStopCellEditing(true);JTree のどこかをクリックすると、編集がコミットされます。ただし、JTextPane のように JTree の外側をクリックすると、編集はコミットされません。したがって、質問:質問: フォーカスが失われたときに JTree がセルの編集を停止するようにするにはどうすればよいですか? または、JTree の場所の外側で左クリックすると? また、これを行うための好ましい方法はありますか?

注: 以下のコードでは、Focus Listener Annoymous 内部クラスを使用してこれを解決しようとし、疑似コードを試しました。WhenTreeLosesFocus() { if( tree.isEditing() ) tree.stopEditing(); }

編集時にフォーカスがツリー内の CellEditor コンポーネントに変更され、編集ボックスが点滅してすぐに点滅するため、これは機能しません。

ソリューションはフォーカスベースである必要はありません。JTree 領域の外側で左クリックすることができます。

SSCEが続きます（ところで、Convienenceのコードを実行すると、スペースバーとF2の両方がノードの名前を変更します。）

import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextPane;
import javax.swing.JTree;
import javax.swing.KeyStroke;

public class StackExchangeQuestion3 {

     public static void main(String[] args){     
     JFrame window = new JFrame();
     window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     window.setTitle("Stack Exchange Question");
     window.setSize(400,500);//variable parameters would be best
     window.setVisible(true);           

     JSplitPane split = new JSplitPane();
     window.getRootPane().setContentPane(split);
     JScrollPane left = new JScrollPane();
     JScrollPane right = new JScrollPane();
     JTree tree = new JTree();//loads sample tree data
     tree.setEditable(true);//select a node then press F2 to edit (built in keybinding)
     tree.getInputMap().put(KeyStroke.getKeyStroke("SPACE"), "startEditing");//can edit with space now
     tree.setInvokesStopCellEditing(true);//this helps stop editing within focus of tree

     JTextPane text = new JTextPane();
     split.setLeftComponent(left);
     split.setRightComponent(right);
     left.setViewportView(tree);
     right.setViewportView(text);
     split.setDividerLocation(200);

     tree.addFocusListener(new FocusListener(){
         public void focusGained(FocusEvent e) {         }
         public void focusLost(FocusEvent e) {
         JTree tree = (JTree)e.getSource();
         if( tree.isEditing() ) tree.stopEditing();
         }
     });//end addFocusListener
     }//end main
}

いずれかの方法が他の方法よりも優先されるかどうかについての推論を含む解説は大歓迎です。マウスがJTreeの外側でクリックしたかどうかを検出する方法のヒント/正しい方向のヒント。

4

1 に答える 1

0 
    import java.awt.Component;
    import java.awt.event.FocusEvent;
    import java.awt.event.FocusListener;
    import javax.swing.JFrame;
    import javax.swing.JScrollPane;
    import javax.swing.JSplitPane;
    import javax.swing.JTextPane;
    import javax.swing.JTree;
    import javax.swing.KeyStroke;
    import javax.swing.tree.DefaultTreeCellEditor;
    import javax.swing.tree.DefaultTreeCellRenderer;
    import javax.swing.tree.TreeCellRenderer;


    public class StackExchangeQuestion3AnsA {

         public static void main(String[] args){  
         new StackExchangeQuestion3AnsA();           
         }        


   StackExchangeQuestion3AnsA(){
         JFrame window;    
         window = new JFrame();
         window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         window.setTitle("Stack Exchange Answer");
         window.setSize(400,500);//variable parameters would be best
         window.setVisible(true);           


         JSplitPane split = new JSplitPane();
       window.setContentPane(split);
         JScrollPane left = new JScrollPane();
         JScrollPane right = new JScrollPane();
         JTree tree;
         tree = new JTree();//loads sample tree data
         tree.setEditable(true);//select a node then press F2 to edit (built in keybinding)
         tree.getInputMap().put(KeyStroke.getKeyStroke("SPACE"), "startEditing");//can edit with space now
         tree.setInvokesStopCellEditing(true);//this helps stop editing within focus of tree
         //even with my fix the above line is still needed

         JTextPane text = new JTextPane();
         split.setLeftComponent(left);
         split.setRightComponent(right);
         left.setViewportView(tree);
         right.setViewportView(text);
         split.setDividerLocation(200);   

         tree.setCellEditor( new MyTreeCellEditor(tree, tree.getCellRenderer()) );

   }//end constructor


private class MyTreeCellEditor extends DefaultTreeCellEditor {
     public MyTreeCellEditor(JTree tree, TreeCellRenderer renderer) {
                    super(tree, (DefaultTreeCellRenderer)renderer);
//Note: http://stackoverflow.com/questions/5031101/why-i-lose-the-focus-for-a-short-time-from-jtree-after-editing-a-node?rq=1 
//André mentions "The tree adds a DefaultCellEditor to the JTree hierarchy when editing starts. This textfield gains the focus."                    
//it's not as simple as just this.addFocusListener()

//2 variables: editingComponent and editingContainer, are inherited from DefaultTreeCellEditor
//the constructor doesn't initialize the editingComponent
//it's null atm, so we can't add focusListener to it, (yet at a later time it will gain focus)    
//FocusOwner (on edit): javax.swing.tree.DefaultTreeCellEditor$DefaultTextField
//editingComponent is by default a DefaultTextField                    
        }        

    @Override
    public Component getTreeCellEditorComponent(final JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row) {
       Component container = super.getTreeCellEditorComponent(tree, value, isSelected, expanded, leaf, row);
//Note: System.out.println("Components Type: "+containeractually.getClass().getName());
//was used to show it was container, javax.swing.tree.DefaultTreeCellEditor$EditorContainer

//getTreeCellEditorComponent(parameters) is called as soon as editing begins
//also at this time editingComponent != null (aka initialized)
//so it's a good place to add in a Focus Listener

editingComponent.addFocusListener( new FocusListener(){
                @Override  public void focusGained(FocusEvent e) { }
                @Override  public void focusLost(FocusEvent e) {
                tree.stopEditing();}                  } );

//EditorContainer is responsible for displaying the editingComponent
//so we added focusListener, after editingComponent initialized, and before it's used
//(I think the return statement means it's about to be used)
        return container;
        }
}//end MyTreeCellEditor

}//end class
于 2013-07-27T00:41:45.853 に答える