CODEWITHSUNDEEP
javaeclipseeclipse-plugin
Marco A.
Marco A.

Reputation: 43662

Change Eclipse toolbar icon dynamically

I've got a toolbar item with its own icon, defined in the plugin.xml file like:

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

How do I change this dynamically when needed? I mean changing it from code

Upvotes: 4

Views: 3163

Answers (2)

Eddy
Eddy

Reputation: 3723

You should implements IElementUpdater in your Handler class.
Please refer to : https://stackoverflow.com/a/23742598/2893073

  1. Handler class

    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. invoke this Handler using 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);
    }

Thanks.

Upvotes: 3

Martti K&#228;&#228;rik
Martti K&#228;&#228;rik

Reputation: 3621

Use org.eclipse.ui.menus extension point instead and add menuContribution with dynamic. The class of dynamic should subclass ControlContribution and implement createControl method to create a button.

Upvotes: 5

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