qiurui
/
qtbase
mirror of https://github.com/qt/qtbase.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fix possible divide by zero in QPlainTextEdit 

If the font engine for some reason fails to get font metrics
for the font, the application should still not crash.

[ChangeLog][Widgets][QPlainTextEdit] Fixed a possible divide
by zero crash when font metrics were missing for the font.

Task-number: QTBUG-40347
Change-Id: I571bc3eace07cdbee6f9ce9aa649df95412aed71
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
This commit is contained in:
Eskil Abrahamsen Blomfeldt 2014-09-11 10:01:44 +02:00 committed by Eskil Abrahamsen Blomfeldt
parent 4b6d873725
commit c1b46b98ed
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/widgets/widgets/qplaintextedit.cpp
View File

@ -998,7 +998,8 @@ void QPlainTextEditPrivate::_q_adjustScrollbars()
} else {
vmax = qMax(0, doc->lineCount() - 1);
vSliderLength = viewport->height() / q->fontMetrics().lineSpacing();
int lineSpacing = q->fontMetrics().lineSpacing();
vSliderLength = lineSpacing != 0 ? viewport->height() / lineSpacing : 0;
}