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How to make a Compartment become invisible when it is empty? [message #232483]

Fri, 05 June 2009 02:08

Eclipse User

Hi people,
is there a way to make a Compartment become invisible when it is empty?

Thanks for all the help I'm getting here!
Best regards,
Alessander

Re: How to make a Compartment become invisible when it is empty? [message #232683 is a reply to message #232483]

Fri, 05 June 2009 07:43

Eclipse User

Hi Alessander,

I don't know how other's do it, but I gave the figure that contains the
compartment a custom layout, which sets the compartment's size to 0 if
it is empty. However, for this I always check the model element to see
if it contains elements in that compartment. To do this I had to pass
the edit part that corresponds to the laid out figure to the very same
when it is created. Maybe there is an easier way to check if a
compartment is empty.

Regards,
Matthias

Alessander Botti Benevides wrote:
> Hi people,
> is there a way to make a Compartment become invisible when it is empty?
>
> Thanks for all the help I'm getting here!
> Best regards,
> Alessander
>

Re: How to make a Compartment become invisible when it is empty? [message #232826 is a reply to message #232483]

Sun, 07 June 2009 06:55

Eclipse User

Hi
I have never done it on my own but in gmfgen ,find your gen compartment
,find the "Hide If Empty" property and simply set it true.
It may work.

Re: How to make a Compartment become invisible when it is empty? [message #233128 is a reply to message #232826]

Tue, 09 June 2009 11:34

Eclipse User

Thanks for the suggestion,
"Hide If Empty" was set true, but it don't makes the compartment invisible.

Best regards,
Alessander Botti Benevides

Re: How to make a Compartment become invisible when it is empty? [message #233136 is a reply to message #232683]

Tue, 09 June 2009 11:44

Eclipse User

Hi Matthias, thank you very much!
But setting the compartment's size to 0 does not makes it totally
invisible in my case, maybe because it has a Stack Layout...
So, I have a different solution: Suppose my metamodel has an EClass named
"C" having an EReference named "attribute" which is the Containemnt
Feature of the compartment named "AttributeCompartment" in the gmfgraph
file:

(i) add "view.setVisible(false);" in the end of the method
decorateView(...) in CAttributeCompartmentViewFactory.java:
protected void decorateView(View containerView, View view, IAdaptable
semanticAdapter, String semanticHint, int index, boolean persisted) {
...
view.setVisible(false);
}

(ii) create a method handleNotificationEvent(Notification event) in
CEdidPart.java:
protected void handleNotificationEvent(Notification event) {
getPrimaryShape().updateContents();
super.handleNotificationEvent(event);
}

(iii) create the method updateContents() inside the class CFigure in
CEdidPart.java (substitute "???" for the name of your GMF project):
private void updateContents() {
CEditPart ceditpart = CEditPart.this;
C element = (C) ceditpart.resolveSemanticElement();
EditPart compartmentEditPart =
getChildBySemanticHint(???.diagram.part.???VisualIDRegistry. getType(???.diagram.edit.parts.CAttributeCompartmentEditPart .VISUAL_ID));
if (compartmentEditPart != null) {
if (element.getAttribute().size() == 0) \\ where getAttribute() refers to
EReference "attribute".
((View) compartmentEditPart.getModel()).setVisible(false);
else
((View) compartmentEditPart.getModel()).setVisible(true);
}
}

Best regards
Alessander Botti Benevides

Re: How to make a Compartment become invisible when it is empty? [message #233152 is a reply to message #232483]

Tue, 09 June 2009 12:28

Eclipse User

Hi,

You could try overriding the figure for compartment. Override isVisible()
method on the figure. Make it return false if children are empty. Children
of the compartment, however, won't be direct children... you'd have to go
down a couple of levels to reach them.

Cheers,
Alex

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