It appears that what I reported is a consequence of https://codereview.qt-project.org/#change,83189 and was also reported in https://bugreports.qt-project.org/browse/QTBUG-38363.
The issue was fixed in 40b195d0f9ee7ef1b917a635bb073fa108b2ed40 and after updating my Qt source and rebuilding I'm no longer seeing the problem in my application. Adam On Tue, Apr 29, 2014 at 9:16 AM, Adam Light <acli...@gmail.com> wrote: > Since updating my git checkout of Qt 5.3 a few days ago to the release > branch (I was previously using the stable branch as of early April) and > rebuilding Qt, I noticed that I sometimes get weird text drawing problems > in my application on Mac OSX 10.9.2 but not Windows 7. > > If I compile my application with Qt 4.8.6, I don't see these problems on > either platform. > > I have attached two examples of the same QPlainTextEdit subclass widget. > In one, each character is drawn as a rectangle in the widget itself > (though, oddly, the window's title is displayed correctly). In the other, > the text is drawn normally. > > The only difference between the two is that the font size is a bit larger > in the window with the text properly drawn. > > > [image: Inline image 2][image: Inline image 3] > > If I change the text size back to what it was originally, the text is > drawn wrong again. > > Here are printouts of the QFont after I set it: > Left example, text drawn incorrectly: > void WMPlainTextEdit::zoomIn(const double) QFont( > "Monaco,11,-1,5,50,0,0,0,0,0" ) pointSizeF: 11 > > Right example, text drawn properly: > void WMPlainTextEdit::zoomIn(const double) QFont( > "Monaco,13.75,-1,5,50,0,0,0,0,0" ) pointSizeF: 13.75 > > I see the same behavior if I try using different font families, and the > particular size doesn't seem to matter. For some font families, I have > found multiple font sizes that cause incorrect drawing, and some I have > found only one but have not tried an exhaustive search. > > When my application starts, all text is drawn correctly in all places. I > can reproducibly cause the text in most places to start drawing wrong by > bringing up a specific dialog, but there are other ways that I can get the > text to start drawing wrong as well. When the text starts drawing wrong in > one place it will sometimes also draw wrong in other places (eg. contextual > menus, dialogs, etc.) but sometimes draw right. > > I have looked through the Qt bug reports and don't see anything related to > this. I also tried building a few of the example projects and can't get the > text to draw incorrectly using an example. My coworkers also get this > behavior, and we're all running OSX 10.9.2 and using the same Qt 5.3 build. > > I'd create a bug report but it'll probably be ignored since I can't > provide much information on how to reproduce this. Has anyone else seen > this kind of behavior or have any ideas where I should start to try to > track down the problem? > > Thanks > Adam > >
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