Question

我有一个带有自己图标的工具栏项，在plugin.xml文件中定义如下：

<action
class="MyActionClass"
id="MyActionID"
label="MyActionLabel"
menubarPath="MyActionMenuBarPath"
toolbarPath="MyActionToolBarPath"
icon="icon/myicon.png" <---- this one
     ...
</action>

如何在需要时动态更改此设置？我的意思是从代码中改变它

Answer 1

使用org.eclipse.ui.menus扩展点，然后使用动态添加 menuContribution 。动态的类应该是ControlContribution的子类并实现createControl方法来创建按钮。

Answer 2

您应该在implements课程中IElementUpdater Handler 请参阅：https://stackoverflow.com/a/23742598/2893073

处理程序类

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);
        }        
    }
}

使用ICommandService：

调用此处理程序

    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。

动态更改Eclipse工具栏图标

2 个答案: