如何根据上下文菜单选项编辑树查看器元素

Question

我想根据我的上下文菜单选项编辑树查看器元素。基本上我需要更新显示的元素值。如果我双击树查看器元素，我能够更新值，但通过上下文菜单，我也应该能够做到。

添加上下文菜单的示例代码：

protected def void createContextMenu(Viewer viewer) { 
    val MenuManager contextMenu = new MenuManager("Menu"); // $NON-NLS-1$ 
    contextMenu.setRemoveAllWhenShown(true); 
    contextMenu.addMenuListener(new IMenuListener() { 

     public override void menuAboutToShow(IMenuManager mgr) { 
       fillContextMenu(mgr); 
     } 
    }); 

    val Menu menu = contextMenu.createContextMenu(viewer.getControl()); 
    viewer.getControl().setMenu(menu); 

} 

/** 
* Fill dynamic context menu 
* 
* @param contextMenu 
*/ 
protected def void fillContextMenu(IMenuManager contextMenu) { 
    contextMenu.add(new GroupMarker(IWorkbenchActionConstants.MB_ADDITIONS)); 

    contextMenu.add(new Action("Rename") { 

     public override void run() { 
      val selectedElement = (treeViewer.selection as IStructuredSelection).firstElement 
     } 
    }); 
} 

Answer 1

看看这有助于还是让我知道，否则

package myFolder; 

import org.eclipse.jface.viewers.ILabelProvider; 
import org.eclipse.jface.viewers.ILabelProviderListener; 
import org.eclipse.jface.viewers.ITreeContentProvider; 
import org.eclipse.jface.viewers.TreeViewer; 
import org.eclipse.jface.viewers.TreeViewerColumn; 
import org.eclipse.jface.viewers.Viewer; 
import org.eclipse.swt.SWT; 
import org.eclipse.swt.events.MenuEvent; 
import org.eclipse.swt.events.MenuListener; 
import org.eclipse.swt.graphics.Image; 
import org.eclipse.swt.layout.FillLayout; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Event; 
import org.eclipse.swt.widgets.Listener; 
import org.eclipse.swt.widgets.Menu; 
import org.eclipse.swt.widgets.MenuItem; 
import org.eclipse.swt.widgets.Shell; 
import org.eclipse.swt.widgets.TreeItem; 

public class trying { 

public static void main(String[] args){ 
    Display display = new Display(); 
    Shell shell = new Shell(display); 
    shell.setLayout(new FillLayout()); 
    shell.setSize(300,300); 

    TreeViewer viewer = new TreeViewer(shell); 
    viewer.getTree().setHeaderVisible(true); 
    viewer.getTree().setLinesVisible(true); 

    viewer.setContentProvider(new ITreeContentProvider() { 

     @Override 
     public void dispose() { 
      // TODO Auto-generated method stub 

     } 

     @Override 
     public void inputChanged(Viewer arg0, Object arg1, Object arg2) { 
      // TODO Auto-generated method stub 

     } 

     @Override 
     public Object[] getChildren(Object arg0) { 
      // TODO Auto-generated method stub 
      return null; 
     } 

     @Override 
     public Object[] getElements(Object arg0) { 
      // TODO Auto-generated method stub 
      return new String[]{"Hoshe","Irani"}; 
     } 

     @Override 
     public Object getParent(Object arg0) { 
      // TODO Auto-generated method stub 
      return null; 
     } 

     @Override 
     public boolean hasChildren(Object arg0) { 
      // TODO Auto-generated method stub 
      return false; 
     } 


    }); 
    viewer.setLabelProvider(new ILabelProvider(){ 

     @Override 
     public void addListener(ILabelProviderListener arg0) { 
      // TODO Auto-generated method stub 

     } 

     @Override 
     public void dispose() { 
      // TODO Auto-generated method stub 

     } 

     @Override 
     public boolean isLabelProperty(Object arg0, String arg1) { 
      // TODO Auto-generated method stub 
      return false; 
     } 

     @Override 
     public void removeListener(ILabelProviderListener arg0) { 
      // TODO Auto-generated method stub 

     } 

     @Override 
     public Image getImage(Object arg0) { 
      // TODO Auto-generated method stub 
      return null; 
     } 

     @Override 
     public String getText(Object arg0) { 
      // TODO Auto-generated method stub 
      return "hoshe"; 
     } 


    }); 
    viewer.setInput("Hoshe");    

    Menu popupMenu = new Menu(viewer.getControl()); 
    MenuItem newItem = new MenuItem(popupMenu, SWT.CHECK); 
    newItem.setText("New"); 
    MenuItem refreshItem = new MenuItem(popupMenu, SWT.CHECK); 
    refreshItem.setText("Refresh"); 
    MenuItem deleteItem = new MenuItem(popupMenu, SWT.CHECK); 
    deleteItem.setText("Delete"); 

    popupMenu.addMenuListener(new MenuListener() { 

     @Override 
     public void menuShown(MenuEvent arg0) { 
      // TODO Auto-generated method stub 

     } 

     @Override 
     public void menuHidden(MenuEvent arg0) { 
      // TODO Auto-generated method stub 
      display.asyncExec(new Runnable() { 

       @Override 
       public void run() { 
        // TODO Auto-generated method stub 
        TreeItem [] arr = viewer.getTree().getSelection(); 
        for(MenuItem item2 : popupMenu.getItems()){ 
         boolean bool1 = item2.getSelection(); 
          if(bool1){ 
           arr[0].setText(item2.getText()); 
           item2.setSelection(false); 
          } 
        } 
       } 
      }); 

     } 
    }); 

    viewer.getTree().setMenu(popupMenu); 
    shell.open(); 
    while(!shell.isDisposed()){ 
     if(!display.readAndDispatch()) 
      display.sleep(); 
    } 
    display.dispose(); 
} 

}