JFace的ComboViewer困难

Question

我有一些像这样的键值对：

1 - 鲍勃

2 - 恭

3 - 迈克尔

我已经把组合观众这个数据，但是当我选择例如2-Christine时，我希望我的组合查看器只显示关键字。

我为comboviewer添加了SelectionChangedListener，但我不知道如何在选择某些内容后更改组合框显示的内容。

Answer 1

您可以使用组合的SWT可编辑模式来实现它。当你进入SWT的只读模式时，输出是不可修改的。我们有一个类似的要求，唯一的区别是在显示框&的末尾附加了一个文本，我们使用了简单的SWT Combo。

请让我知道它是否有帮助。 仅供参考。

package com.test; 

import java.util.HashMap; 
import java.util.Map; 
import org.eclipse.jface.viewers.ArrayContentProvider; 
import org.eclipse.jface.viewers.ComboViewer; 
import org.eclipse.jface.viewers.IBaseLabelProvider; 
import org.eclipse.jface.viewers.IContentProvider; 
import org.eclipse.jface.viewers.ILabelProvider; 
import org.eclipse.jface.viewers.ILabelProviderListener; 
import org.eclipse.jface.viewers.ISelectionChangedListener; 
import org.eclipse.jface.viewers.IStructuredContentProvider; 
import org.eclipse.jface.viewers.LabelProvider; 
import org.eclipse.jface.viewers.SelectionChangedEvent; 
import org.eclipse.jface.viewers.StructuredSelection; 
import org.eclipse.jface.viewers.Viewer; 
import org.eclipse.swt.SWT; 
import org.eclipse.swt.graphics.Image; 
import org.eclipse.swt.layout.FillLayout; 
import org.eclipse.swt.widgets.Display; 
import org.eclipse.swt.widgets.Shell; 

public class ComboViewerExample { 

public static void main(String[] args) { 
    Display display = new Display(); 

    Shell documentViewDialog = new Shell(Display.getDefault().getActiveShell(),SWT.SHELL_TRIM); 
    documentViewDialog.setLayout(new FillLayout()); 

    Map<String , String> persons = new HashMap<String, String>(); 
    persons.put("1","Bob"); 
    persons.put("2","Christine"); 
    persons.put("3","Michael"); 

    ComboViewer viewer = new ComboViewer(documentViewDialog,SWT.BORDER); 

    viewer.setContentProvider(new IStructuredContentProvider() { 

     @Override 
     public void inputChanged(Viewer paramViewer, Object paramObject1, Object paramObject2) { 
      // TODO Auto-generated method stub 

     } 

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

     } 

     @Override 
     public Object[] getElements(Object paramObject) { 

      return ((HashMap)paramObject).keySet().toArray(); 
     } 
    });  

    viewer.setLabelProvider(new LabelProvider() { 

     @Override 
     public String getText(Object element) { 
      Object obj = persons.get(element); 
      String stg = element.toString() + " " + obj; 
      return stg; 
     } 

    }); 



    viewer.setInput(persons); 

    viewer.addSelectionChangedListener(new ISelectionChangedListener() { 

     @Override 
     public void selectionChanged(SelectionChangedEvent paramSelectionChangedEvent) { 
      ((StructuredSelection)paramSelectionChangedEvent.getSelection()).getFirstElement(); 
      viewer.getCombo().setText(((StructuredSelection)paramSelectionChangedEvent.getSelection()).getFirstElement().toString()); 
     } 
    }); 

    documentViewDialog.setSize(150, 150); 
    documentViewDialog.open(); 
    while(!documentViewDialog.isDisposed()) 
    { 
     if(!display.readAndDispatch()) 
     { 
       display.sleep(); 
     } 
    } 
    display.dispose(); 
} 

}