Bug 19856 - Opacity doesn't work reliably
Summary: Opacity doesn't work reliably
Alias: None
Product: Class Libraries
Classification: Mono
Component: Windows.Forms ()
Version: 3.4.0
Hardware: PC Linux
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2014-05-16 12:00 UTC by eb1
Modified: 2014-05-20 07:59 UTC (History)
2 users (show)

Is this bug a regression?: ---
Last known good build:

Sample program that demonstrates the problem (4.28 KB, application/x-bzip)
2014-05-16 12:09 UTC, eb1

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Description eb1 2014-05-16 12:00:11 UTC
Setting the transparency for a form doesn't really work. You can set the opacity before showing the form, but then it's not possible set opacity=1 later on. If you initially show the form with opacity==1 you can't make it transparent later.
Comment 1 eb1 2014-05-16 12:09:25 UTC
Created attachment 6825 [details]
Sample program that demonstrates the problem

The attached sample program demonstrates the problem. By clicking the + and - buttons the opacity of the form should change, but currently it stays the same.
Comment 2 eb1 2014-05-16 12:52:49 UTC
Suggested fix in PR #1040
Comment 3 Alexis Christoforides 2014-05-20 07:59:03 UTC
Merged to master (256e54e2320c3d62b9e73f23cea3de82c5a64056).