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Missing SWT Image Constants [message #988899]

Mon, 03 December 2012 15:48

Franz-Stefan Mising name

Messages: 12
Registered: December 2010

Junior Member

Hi,

I am trying to create a grayed (or disabled) version of an SWT image as described in [1] under "Image Effects":

Image grayImage = new Image(display,image,SWT.IMAGE_GRAY);

However, neither the SWT.IMAGE_GRAY nor the SWT.IMAGE_DISABLE constants seem to be available in RAP 1.5.
Any suggestions on how to achieve this in RAP?

I know it is possible somehow because disabling a button that has an associated image does gray out/disable that image.

Thanks,
Franz-Stefan

[1] http://www.eclipse.org/articles/Article-SWT-images/graphics-resources.html
(I use the SWT class from org.eclipse.rap.rwt-1.5.1.20120917-1116.jar).

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Re: Missing SWT Image Constants [message #989222 is a reply to message #988899]

Wed, 05 December 2012 09:41

Ralf Sternberg

Messages: 1313
Registered: July 2009

Senior Member

Hi Franz-Stefan,

There is an open feature request for this: [1]. However, it's not a
straight forward implementation, because SWT uses native libraries to
transform images, which we can't do in RAP. I guess the simplest
solution is to create and register grayed images on your own.
Alternatively, you can use some third-party library to process images at
runtime.

Disabling a button does not change the actual image in RAP.

Regards, Ralf

[1] 317439: Support for IMAGE_GRAY and IMAGE_DISABLE
https://bugs.eclipse.org/bugs/show_bug.cgi?id=317439

--
Ralf Sternberg

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