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How to set Text in a Shape ? [message #208591]

Tue, 07 February 2006 06:20

Eclipse User

Hello

I've been experimenting with the GEF Shape Editor Example.
I want to have Text displayed in the Shape according
to the properties and when the properties have changed the
Text in the shape should have changed. Does anybody
know how i can realize this ?

Thanks in advance for any answer.

Re: How to set Text in a Shape ? [message #208600 is a reply to message #208591]

Tue, 07 February 2006 11:06

Eclipse User

Originally posted by: guen.my-lounge.net

Marcel schrieb:
> Hello
>
> I've been experimenting with the GEF Shape Editor Example.
> I want to have Text displayed in the Shape according
> to the properties and when the properties have changed the
> Text in the shape should have changed. Does anybody
> know how i can realize this ?
>
> Thanks in advance for any answer.

Hi,

to get your figure connected to the eclipse property view try following
steps:

1. the model of the figure must implements IPropertySource

some code example:

public class ClassViewModel extends ModelPropertyChangeSupport
implements IPropertySource {

public static final String PROPERTY_NAME = "Name";
public static final String PROPERTY_NAME_ID = "name";
private String name;
private IPropertyDescriptor[] propertyDescriptor;
....
public Object getEditableValue() { return this; }

public IPropertyDescriptor[] getPropertyDescriptors() {
if ( this.propertyDescriptor == null ) {
this.propertyDescriptor = new IPropertyDescriptor[ 1 ];
this.propertyDescriptor[ 0 ] =
new TextPropertyDescriptor(
ClassViewModel.PROPERTY_NAME_ID,
ClassViewModel.PROPERTY_NAME );
}
return this.propertyDescriptor;
}

public Object getPropertyValue( Object id ) {
if ( id.equals( ClassViewModel.PROPERTY_NAME_ID ) )
return this.getName();
return null;
}

public boolean isPropertySet( Object id ) {
return true;
}

public void resetPropertyValue( Object id ) {}

public void setPropertyValue( Object id, Object value ) {
if ( id.equals( ClassViewModel.PROPERTY_NAME_ID ) ) {
this.setName( value.toString() );
this.firePropertyChange(
ClassViewModel.EVENT_PROPERTY_CHANGED,null,null);
}
}

2. the model must fire an event for the editpart to refresh visuals

some code example:

public class ClassEditPart extends AbstractGraphicalEditPart implements
PropertyChangeListener {

public void propertyChange( PropertyChangeEvent propertyChangeEvent ) {
if ( propertyChangeEvent.getPropertyName().equals(
ClassViewModel.EVENT_PROPERTY_CHANGED ) ) {
this.refreshVisuals();
}
}

protected void refreshVisuals() {
((ClassFigure)this.figure).setName(
(ClassViewModel)this.getModel()).getName() );
}

anyway, code code examples are on the folowing link
http://www13.plala.or.jp/observe/
even if i couldn't read the descriptions

Regards,
Christian

Re: How to set Text in a Shape ? [message #208617 is a reply to message #208600]

Tue, 07 February 2006 13:05

Eclipse User

I know this tutorial and it is by far the best description
how to implement a GEF Model(apart from the fact that i neither can read it). The refresh of the properties
works well but i can't get text in the Shapes of the
Shape Editor Example. I tried to adapt the code from the side without success.

Re: How to set Text in a Shape ? [message #208642 is a reply to message #208617]

Tue, 07 February 2006 13:31

Eclipse User

Originally posted by: guen.my-lounge.net

Marcel schrieb:
> I know this tutorial and it is by far the best description
> how to implement a GEF Model(apart from the fact that i neither can read it). The refresh of the properties
> works well but i can't get text in the Shapes of the
> Shape Editor Example. I tried to adapt the code from the side without success.

try to give the figure a label for text

class ShapeEditPart ...

Label label = new Label();

protected IFigure createFigure() {
...
// add a label for text here
f.add( label );
...
}

protected void refreshVisuals() {
...
// set the text here
label.setText( (Model?)this.getModel.getText() );
...
}

hope that will help you

Re: How to set Text in a Shape ? [message #208693 is a reply to message #208642]

Wed, 08 February 2006 03:11

Eclipse User

I've tried that too but the Label didn't appear.
There is something missing. Maybe you can give me a hint !

Re: How to set Text in a Shape ? [message #208701 is a reply to message #208642]

Wed, 08 February 2006 03:15

Eclipse User

I was blind ! One Minute after i posted the previous message
i got the solution. I had to return the label and not the previous figure.... arrgggg.....
Thank you all for your help !

Re: How to set Text in a Shape ? [message #208726 is a reply to message #208642]

Wed, 08 February 2006 05:40

Eclipse User

I think i was a little bit to euphoric. Now i get
only the label because i return the label. But if i add the label to the figure it is not visible.
My question now is how i can make the label appear on the figure ?

Re: How to set Text in a Shape ? [message #208776 is a reply to message #208726]

Wed, 08 February 2006 10:16

Eclipse User

Originally posted by: ingo.koch[nospam].sap.com

You have to add a layout manager to the figure holding the label. e.g.
XYLayout

"Marcel" <marcel.au@web.de> wrote in message
news:960357.1139395257467.JavaMail.root@cp1.javalobby.org...
> I think i was a little bit to euphoric. Now i get
> only the label because i return the label. But if i add the label to the
figure it is not visible.
> My question now is how i can make the label appear on the figure ?

Re: How to set Text in a Shape ? [message #208791 is a reply to message #208776]

Wed, 08 February 2006 11:30

Eclipse User

Thanks all for the help !
Now it works.

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