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Problem with transparancy in Styles [message #778465]

Thu, 12 January 2012 16:28

Veit Hoffmann

Messages: 20
Registered: July 2009

Junior Member

I have the impression that the transparancy set in a style is ignored.

When i register a style with transparency like this:
public static Style getStyleForOverlay(Diagram diagram) {
final String styleId = "OVERLAY"; //$NON-NLS-1$
Style style = findStyle(diagram, styleId);
IGaService gaService = Graphiti.getGaService();
if (style == null) { // style not found - create new style
style = gaService.createStyle(diagram, styleId);
...
style.setTransparency(0.7d);
}
return style;
}

A Figure is not transparent:
Rectangle rectangle = gaService.createRectangle(...);
....
rectangle.setStyle(StyleUtil.getStyleForOverlay(diagram));
only if i add:
rectangle.setTransparency(0.7d);

Is this an issue or am I doing something wrong?

Thanks in advance

Veit

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Re: Problem with transparancy in Styles [message #780230 is a reply to message #778465]

Tue, 17 January 2012 12:13

Michael Wenz

Messages: 1921
Registered: July 2009
Location: Walldorf, Germany

Senior Member

Hi,

well, partly an issue, partly wrong... ;-)

Styles and the default values do not really fit together. We have done some
rework on the styles for Graphiti 0.9.0 (see
https://bugs.eclipse.org/bugs/show_bug.cgi?id=352542). The standard creation
methods in the GAService do nothing about any default values defined in the
Graphiti metamodel; on the other hand styles are only checked if no value
(not even a default value) is set. In order to make the transparency from
the style being used, you have to unset the transparency for your rectangle.
In order to overcome this we have introduced createPlain methods in the
service that already do this; they should be used starting 0.9.0 when
working with styles. Until then, unsetting will do the job.

Michael

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Re: Problem with transparancy in Styles [message #780365 is a reply to message #780230]

Tue, 17 January 2012 17:04

Veit Hoffmann

Messages: 20
Registered: July 2009

Junior Member

Hi,

thanks for the response. I gonna try the 0.9 creators then ;)

Veit

Am 17.01.2012 13:13, schrieb Michael Wenz:
> Hi,
>
> well, partly an issue, partly wrong... ;-)
>
> Styles and the default values do not really fit together. We have done
> some rework on the styles for Graphiti 0.9.0 (see
> https://bugs.eclipse.org/bugs/show_bug.cgi?id=352542). The standard
> creation methods in the GAService do nothing about any default values
> defined in the Graphiti metamodel; on the other hand styles are only
> checked if no value (not even a default value) is set. In order to make
> the transparency from the style being used, you have to unset the
> transparency for your rectangle. In order to overcome this we have
> introduced createPlain methods in the service that already do this; they
> should be used starting 0.9.0 when working with styles. Until then,
> unsetting will do the job.
>
> Michael
>

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