更改Eclipse工具栏图标动态

Question

我得有自己的图标工具栏项，像plugin.xml文件中定义？我的意思是，从代码

Answer 1

使用org.eclipse.ui.menus扩展点，而不是改变它，并添加menuContribution与动态。 类的动态应子类ControlContribution并实施createControl方法来创建按钮。

Answer 2

您应该implementsIElementUpdater在您的Handler类。
请参考：https://stackoverflow.com/a/23742598/2893073

1. Handler类

   import java.util.Map;  
   import org.eclipse.core.commands.AbstractHandler; 
   import org.eclipse.core.commands.ExecutionEvent; 
   import org.eclipse.core.commands.ExecutionException; 
   import org.eclipse.jface.resource.ImageDescriptor; 
   import org.eclipse.ui.commands.IElementUpdater; 
   import org.eclipse.ui.menus.UIElement;  
   import com.packpub.e4.menu.Activator;  
   public class SampleHandler2 extends 
         AbstractHandler implements IElementUpdater{  
       private static ImageDescriptor image_enable = 
        Activator.getImageDescriptor("icons/btn_adapt_enable.png"); 
       private static ImageDescriptor image_disable = 
        Activator.getImageDescriptor("icons/btn_adapt_disable.png");   
       /** 
       * The constructor. 
       */ 
       public SampleHandler2() { 
   
       }  
       /** 
       * the command has been executed, so extract extract the needed information 
       * from the application context. 
       */ 
       public Object execute(ExecutionEvent event) throws ExecutionException { 
        //... 
        return null; 
       }  
       @Override 
       public void updateElement(UIElement element, @SuppressWarnings("rawtypes") Map map) { 
        boolean condition = false;    
        //...    
        if(condition) { 
         element.setIcon(image_disable); 
        }else{ 
         element.setIcon(image_enable); 
        }   
       } 
   } 
   

2. 调用这个处理程序使用ICommandService：

   IWorkbenchWindow window = part.getSite().getWorkbenchWindow(); 
       ICommandService commandService = (ICommandService) window.getService(ICommandService.class); 
       if (commandService != null) { 
        commandService.refreshElements("com.packpub.e4.menu.commands.sampleCommand", null); 
       } 
   

感谢。