Cannot choose buckminster build step in Jenkins

There is a bug in buckminster plugin for Jenkins where when choosing buckminster as build step, nothing happens - drop down does not expand. This bug explains cause and solution which probably will be fixed.

Find exact revision at which svn branch was cut

svn log -v -r0:HEAD --stop-on-copy --limit 1

Decorating GEF figure using EditPolicy

In GMF there is a nifty DragDropEditPolicy that allows you to decorate EditPart's figure by changing background color thus indicating to the user that he is hovering over particular figure. I wanted to use this in my GEF editor, but unfortunately this policy does not exist in GEF.

To make use of this policy I made my plugin depend on import org.eclipse.gmf.runtime.diagram.ui.editpolicies and extended DragDropEditPolicy with my own

public class DesignerDragDropEditPolicty extends DragDropEditPolicy {
 private Label connectionLabel;
 private PolylineConnection relationFigure;
 private DesignerEditor editor;
 private Image image;

 public DesignerDragDropEditPolicty() {
  connectionLabel = new Label();
  connectionLabel.setOpaque(false);
  image = DesignerUIPlugin.getDefault().getImageRegistry().get(ImageConstants.DROP_ICON);
  connectionLabel.setIcon(image);
  
 }
 
 @Override
 // remove icon when edit policy is done
 public void eraseTargetFeedback(Request request) {
  if(relationFigure != null){
   if(relationFigure.getChildren().contains(connectionLabel)){
    relationFigure.remove(connectionLabel);
   }
  }
 }
 
 // add icon on filtered edit part. Remove it when another edit part is hovered over.
 public void showTargetFeedback(Request request) {
  if(request instanceof CreateRequest){
   editor = (DesignerEditor) DesignerUtil.getActiveDesignerTab();
   Point location = ((CreateRequest)request).getLocation();
   EditPart part = editor.getViewer().findObjectAt(location);

   if(part instanceof RelationEditPart){
    relationFigure = ((RelationEditPart)part).getConnection();
    relationFigure.add(connectionLabel, new MidpointLocator(relationFigure, 0));
    relationFigure.repaint();
   }
   else{
    if(relationFigure != null){
     if(relationFigure.getChildren().contains(connectionLabel)){
      relationFigure.remove(connectionLabel);
     }
    }
   }
  }
 }
}

Instead of changing background of the figure as DragDropEditPolicy does I did something different. Whenever user passes inside an EditPart, in my case it's a relation, I put an icon signifying that in this case an object can be dropped onto existing connection an be created in the middle of the relation. I could have put a label saying "Drop here", but I think icons work better than words and after you get used to seeing a particular label with words it gets annoying.

Notice that in showTargetFeedback I filter out EditPart that I am interested in, so here code can be added to add different behavior for other parts.

Implementing “select on focus” behavior for an Eclipse Text control

http://stackoverflow.com/questions/10038570/implementing-select-on-focus-behavior-for-an-eclipse-text-control/10049615#10049615

Examine Eclipse via OSGi console

• Launch eclipse with just the osgi console (eclipse -console -noexit) 
• Run 'ss' to figure out what hasn't been resolved 
• 'diag [bundle #]' will give you some details on the problem

Adding 'Collapse All' button to a view

Start by adding extension point to plugin.xml of plugin where View lives:

Then add service code to the View's createPartControl method:

 
 IWorkbenchPartSite site = getSite();
        if (site != null) {
         IHandlerService handlerService = (IHandlerService) site.getService(
           IHandlerService.class);
         if (handlerService != null) {
          CollapseAllHandler fCollapseHandler = new CollapseAllHandler(viewer);
          handlerService.activateHandler(CollapseAllHandler.COMMAND_ID ,
            fCollapseHandler);
         }
        }

Find out plugin and id of menu item

ALT+SHIFT+F2 and then click on the item