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CustomFeature's create & get all Elements [message #1052810]

Tue, 30 April 2013 15:01

Andrej K

Messages: 26
Registered: March 2013
Location: germany

Junior Member

Hello!

I have 2 questions, maybe somebody can give me an idea how i can do this

I've created new "testFeature" extended from AbstractCustomFeature and can call it in my Diagram. How can i get a List which contains all Elements from the Diagram?(i want to update their names and colors at start and later)

My second question is:
I'm trying to add some Elements to the Diagram without drag and drop them from the palette.

For example i have some Elements saved in the Diagram and my "model say i miss 3 Elements in the Diagram". I want to write an Custom Feature, which draw/put missing Elements in the Graphiti Diagram with just one/two clicks, maybe i need to use Zest at this part? but at the beginning i just want to put few elements without drop them from the Palette, how can i do this?

Maybe somebody can give me direction?

Thanks for your help!

Andrej K.

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Re: CustomFeature's create & get all Elements [message #1053488 is a reply to message #1052810]

Mon, 06 May 2013 08:54

Michael Wenz

Messages: 1931
Registered: July 2009
Location: Walldorf, Germany

Senior Member

Andrej,

what exactly do you mean with "all Elements from the Diagram"? In case you
are talking about the Graphiti pictogram elements, you can simply retrieve
the sahpes contained directly in the diagram by calling getChildren on the
diagram instance. In case one of the returned shapes is a ContainerShape it
might again have children.

In order to add objects via drag&drop you can simply use an add feature that
adds the object representation to the diagram. Depending on where you drag
from, you might need to add an additional drag target listener to the
editor. The tutorial implements adding EClasses from the project explorer.
Have you seen that?

Michael

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Re: CustomFeature's create & get all Elements [message #1058217 is a reply to message #1053488]

Mon, 13 May 2013 09:14

Andrej K

Messages: 26
Registered: March 2013
Location: germany

Junior Member

I mean i want to get all Elements which are in the Diagram, so i can change their Names/Labels, Colors and maybe their Image/Icon at start or later during the editing

public class testFeature extends AbstractCustomFeature {
...
 public void execute(ICustomContext context) {
    	  Diagram diagram = getDiagram();
          EList<Shape> diagramChildren= diagram.getChildren();
          
          Iterator<Shape> it = diagramChildren.iterator();
          while (it.hasNext()) {
        	  Shape testObjekt= it.next();
                  Object bo = getBusinessObjectForPictogramElement(testObjekt);
        	  
        	  if (bo instanceof Task) {//dont work
                      Task eClass = (Task) bo;//dont work
        		  
        	      eClass.setName(stringFromModel);
        	      eClass.setColor(colorFromModel);  
        		  
        	  }
          }
 }
}

I'm trying that in this code and i can get a count of all Elements which are in the Diagram, but i have no Idea how i can get/change their Names

If i run this (without "if()") i get this exception:

java.lang.ClassCastException: 
de.model.prozesse.impl.TaskImpl cannot be cast to de.model.prozesse.Task

i think its because i put "Shape" Element instead of "PictogramElement" in getBusinessObjectForPictogramElement, i have no Idea how i can solve this
Can you give me a Nudge, how i should go ahead?

(Sorry for the late answer, i was ill)

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Re: CustomFeature's create &amp; get all Elements [message #1058237 is a reply to message #1058217]

Mon, 13 May 2013 10:13

Michael Wenz

Messages: 1931
Registered: July 2009
Location: Walldorf, Germany

Senior Member

Andrej,

your coding looks perfectly fine. I assume there is something wrong with
your EMF model. Does TaskImpl implement Task?

Michael

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Re: CustomFeature's create &amp; get all Elements [message #1058263 is a reply to message #1058237]

Mon, 13 May 2013 12:10

Andrej K

Messages: 26
Registered: March 2013
Location: germany

Junior Member

Hello,
yes it does, i looked into Example from Vogella to build/generate my EMF model/classes
http://www.vogella.com/articles/EclipseEMF/article.html

i think i know how to change the Name (code from "updatefeature" helps)... don't know if it works for Colors & Icons/pictures later.

Now i can change the Names of Elements but, problem is the condition of my IF is true just for Objects i created after the load. Objects/Elements which where created saved and loaded became not realized

for example i load my Diagram and have Object_1 and Object_2
then i add Object_3 and Object_4
(all 4 Objects are Tasks)
then I execute my testFeature and get all 4 Objects, but just Object_3 and 4 go into my IF Order and i can change the Names of them

How it could be?Why the IF Order don't realize loaded Elements?What I'm missing`?

Andrej

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