Bug 1290778 - GtkButton/GtkLabel - gtk_style_context_add_provider() fails after gtk_style_context_get_color()
GtkButton/GtkLabel - gtk_style_context_add_provider() fails after gtk_style_c...
Product: Fedora
Classification: Fedora
Component: gtk3 (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Matthias Clasen
Fedora Extras Quality Assurance
Depends On:
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Reported: 2015-12-11 07:33 EST by Martin Stransky
Modified: 2016-12-20 11:55 EST (History)
3 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2016-12-20 11:55:19 EST
Type: Bug
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Attachments (Terms of Use)
testcase (2.26 KB, text/plain)
2015-12-11 07:33 EST, Martin Stransky
no flags Details
testcase - GtkLabel theme (2.75 KB, text/x-csrc)
2015-12-18 04:47 EST, Martin Stransky
no flags Details

  None (edit)
Description Martin Stransky 2015-12-11 07:33:50 EST
Created attachment 1104640 [details]

Description of problem:

When implementing https://bugzilla.mozilla.org/show_bug.cgi?id=1158076 I found a problem when two themes (default and light) are used in the same application.

See the attached example - when style context is saved gtk_style_context_add_provider() fails to add a CSS provider (or at least I've got a wrong colors).

It seems to affect only GtkButton/GtkLabel

Version-Release number of selected component (if applicable):
Comment 1 Matthias Clasen 2015-12-17 15:31:45 EST
I think the gtk version number is wrong ? f23 should have 3.18.x
Comment 2 Benjamin Otte 2015-12-17 15:39:52 EST
That's entirely possible. I certainly wouldn't expect anything this complex to happen between a save()/restore() pair, which are supposed to happen temporarily during draw() or get_size() callbacks.

That said, it might be that this just started working since CSS nodes were introduced in 3.18.
Comment 3 Matthias Clasen 2015-12-17 19:40:36 EST
ftr, CSS nodes were introduced in 3.19.3, so it might have started working in rawhide.
Comment 4 Martin Stransky 2015-12-18 04:47 EST
Created attachment 1107056 [details]
testcase - GtkLabel theme

There's more real-life example.

gtk_style_context_get_color() seems to lock the GtkLabel widget and gtk_style_context_add_provider() is not effective then.

I get text color from GtkLabel and then set light theme and do that again. It works for all widgets but fails for GtkLabel only.
Comment 5 Martin Stransky 2015-12-18 04:49:08 EST
Thanks. The context save()/restore() is not so important here, I'm more focused to the style lock.
Comment 6 Fedora End Of Life 2016-11-24 09:09:46 EST
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Comment 7 Fedora End Of Life 2016-12-20 11:55:19 EST
Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is
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