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Bug 518555

Summary:	Alpha on Shell and Composite
Product:	[RT] RAP	Reporter:	John Gymer <jgymer>
Component:	RWT	Assignee:	Project Inbox <rap-inbox>
Status:	RESOLVED FIXED	QA Contact:
Severity:	enhancement
Priority:	P3	CC:	ivan
Version:	3.1
Target Milestone:	3.5 M3
Hardware:	PC
OS:	Windows 7
See Also:	https://git.eclipse.org/r/122259 https://git.eclipse.org/c/rap/org.eclipse.rap.git/commit/?id=03e07741c3df72892016929417a8d6aa08d5a98a
Whiteboard:

Description John Gymer

2017-06-21 05:16:43 EDT

Would it be possible to support Alpha for transparency on Shells, Composites and Scrolling/Scrolled Composites without cascading to children?
A specific use-case is where we have a Shell that we want partly transparent so we can see the items behind it, but the controls within that Shell need to be opaque. For example, a logon dialog box where we want to see a corporate image behind but the logon entry fields as opaque.

At present, if we set the Shell's alpha then all the controls within the Shell also become transparent to that level too.

Comment 1 Ivan Furnadjiev

2017-06-26 03:57:12 EDT

Most of the controls including Composite supports "opacity" property set by the thememing. I'm not sure if this will solve your issue, but you could give it a try.

Comment 2 John Gymer

2017-06-26 04:28:04 EDT

Thanks Ivan, but unfortunately this also causes opacity to be cascaded down to children.
What I'm looking for is the background of a Shell to be partly transparent, but the controls within it to be totally opaque.
Perhaps support for RGBa in Shells and Composites would resolve it?

Comment 3 Ivan Furnadjiev

2017-06-26 04:54:19 EDT

(In reply to comment #2)
> Thanks Ivan, but unfortunately this also causes opacity to be cascaded down to
> children.
> What I'm looking for is the background of a Shell to be partly transparent, but
> the controls within it to be totally opaque.
> Perhaps support for RGBa in Shells and Composites would resolve it?

Probably... using RGBA as "background" instead of setting the "opacity"

Comment 4 Eclipse Genie

2018-05-07 09:03:40 EDT

New Gerrit change created: https://git.eclipse.org/r/122259

Comment 5 Eclipse Genie

2018-05-09 06:22:07 EDT

Gerrit change https://git.eclipse.org/r/122259 was merged to [master].
Commit: http://git.eclipse.org/c/rap/org.eclipse.rap.git/commit/?id=03e07741c3df72892016929417a8d6aa08d5a98a