Eclipse Community Forums: Graphiti » Expand/Collapse Custom Feature

Help

Home

Home » Modeling » Graphiti » Expand/Collapse Custom Feature

Show: Today's Messages :: Show Polls :: Message Navigator

Expand/Collapse Custom Feature [message #897246]

Mon, 23 July 2012 11:51

Surya Kathayat

Messages: 44
Registered: July 2012

Member

Hi,

I am trying to write a custom feature to a Task node in graphical editor.
The feature shall do the following.

- Update the icon of collapse context button dynamically i.e. after the node is collabpse expladable icon shall be shown.
- When expanded some extra nodes will be added/shown in adiagram editor. For example in the attached figure, when "expand" on "X" node is clicked, then nodes "A", "B" and links X->A, X->B will be shown. The case will be opposite on collapse.

index.php/fa/10807/0/

The following is execute method of my custom feature class. The question is how can I add/delete nodes and links to the diagram from the "execute" method of my custom feature class?

 @Override
    public void execute(ICustomContext context) {
    	
          MessageDialog.openInformation(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(), "Information",
          "The 'Collapse Feature' is intentionally not implemented yet.");
          
          PictogramElement[] pes = context.getPictogramElements();
          if (pes != null && pes.length == 1) {
              Object bo = getBusinessObjectForPictogramElement(pes[0]);
              if (bo instanceof Task) {
              	Task task = (Task) bo;
              	
              	if((task.getHasSubtasks() !=null) && task.getHasSubtasks()==1){
              		// set the icon flag
              		this.isExpanded = true;
              		
              		// get db connection
              		TaskDaoProxy taskDaoProxy = new TaskDaoProxyImpl(task.getIdCenterName());	
              		
              		// I will get list of links and tasks nodes here
              		List<Link> links = taskDaoProxy.getChildTaskLinksForGraph(Integer.valueOf(task.getMcTaskId()), false);
              		
              		// then HOW TO ADD THEM IN DIAGRAM ???
              	}
              	else {
              		// set the icon flag
              		 this.isExpanded = false;
              	}
              	
              	// update pictogram
                updatePictogramElement(pes[0]);
                
                // set the done flag
                this.hasDoneChanges = true;
              }
          }
    }
    
    @Override
    public boolean hasDoneChanges() {
           return this.hasDoneChanges;
    }

Attachment: expandcollapse.gif
(Size: 8.29KB, Downloaded 521 times)

[Updated on: Mon, 23 July 2012 11:52]

Report message to a moderator

Re: Expand/Collapse Custom Feature [message #897256 is a reply to message #897246]

Mon, 23 July 2012 12:32

Matthias Gorning

Messages: 81
Registered: April 2010
Location: Germany

Member

I assume that you already have an add feature for your Task nodes.

Hence you can simply add these lines to the execute method of your custom feature:

AreaContext areaContext = new AreaContext();
areaContext.setLocation(20, 20);
areaContext.setSize(100, 100);
AddContext addContext = new AddContext(areaContext, <your business object>); // Tasks or Links
addContext.setTargetContainer(getDiagram());
getFeatureProvider().addIfPossible(addContext);

Report message to a moderator