Bug 65857

Summary:

[Qt] SELECT/OPTION rendered differently when using a transparent background

Product:

WebKit

Reporter:

Lapo Luchini <lapo>

Component:

Layout and Rendering

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED INVALID

Severity:

Normal

CC:

andersca, cshu, lapo, rniwa, tonikitoo, yael

Priority:

Version:

528+ (Nightly build)

Hardware:

OS:

Windows 7

Attachments:

Description	Flags
rendering bug screenshot	none
Qt Creator project	none
Qt Creator project with a minimal test-case.	none
bugged tooltip	none
it's ok when transparency is commented	none
minimal testcase with tooltips	none

Lapo Luchini

Reported 2011-08-08 08:31:04 PDT

Created attachment 103250 [details] rendering bug screenshot Windows XP SP3, Qt SDK 1.1.2, Qt 4.7.3, WebKit 533.3. I made a simple program to view a (local) web project of mine with the added benefit of being able to have a transparent background. After a bit of experimentation to get transparency right (and being bit by QTBUG-11591 and starting from scratch not using QML) I managed to have a mostly working version, but I have a but in the usage of {{SELECT/OPTIONs}}. I didn't yet reduce the HTML project to be able to attach it, but I think the screenshot has the gist of it. Do you have any idea why the control chances GUI completely (losing borders and using a different down-arrow) when transparency is used?

Attachments
rendering bug screenshot (23.26 KB, image/png) 2011-08-08 08:31 PDT, Lapo Luchini	no flags	Details
Qt Creator project (1.56 KB, application/zip) 2011-08-08 08:32 PDT, Lapo Luchini	no flags	Details
Qt Creator project with a minimal test-case. (1.30 KB, application/zip) 2011-08-09 07:12 PDT, Lapo Luchini	no flags	Details
bugged tooltip (17.05 KB, image/png) 2013-06-24 09:44 PDT, Lapo Luchini	no flags	Details
it's ok when transparency is commented (19.28 KB, image/png) 2013-06-24 09:44 PDT, Lapo Luchini	no flags	Details
minimal testcase with tooltips (1.33 KB, application/zip) 2013-06-24 09:48 PDT, Lapo Luchini	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Lapo Luchini

Comment 1 2011-08-08 08:32:04 PDT

Created attachment 103251 [details] Qt Creator project

Lapo Luchini

Comment 2 2011-08-09 07:12:02 PDT

Created attachment 103359 [details] Qt Creator project with a minimal test-case.

Lapo Luchini

Comment 3 2011-08-10 01:03:47 PDT

I made a few more tests. The same problems also shows up with hover texts: they have black background and are thus illegible (on WinXP, same platform as before). I also tested it using QtCreator under FreeBSD: the hove text is right (has azure background, not black), but the SELECT bug it's also there, though a little different (when the drop-down is open the background is semi-transparent as opposed as black; also on WinXP the background is initially black but changes to "selected row" style while hovering, but keeps that after the hovering is finished, in the original screenshot you can see I was on the second line, but the first line was still looking selected). Hope this helps. In the meantime I'm using <SELECT multiple> as a work around, as that does seems to render correctly (i.e., with white background).

Lapo Luchini

Comment 4 2011-09-01 02:40:09 PDT

Also tooltips (HTML 'title') and the right-click menu appear with an unreadable black background.

Lapo Luchini

Comment 5 2011-11-18 02:07:12 PST

BTW: I verified this (with the attached minimal test-case) on both Windows XP and Windows 7.

Lapo Luchini

Comment 6 2013-06-24 09:44:20 PDT

Created attachment 205304 [details] bugged tooltip

Lapo Luchini

Comment 7 2013-06-24 09:44:59 PDT

Created attachment 205305 [details] it's ok when transparency is commented

Lapo Luchini

Comment 8 2013-06-24 09:48:28 PDT

Created attachment 205306 [details] minimal testcase with tooltips Still bugged on Qt 4.8.1.

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