diff options
Diffstat (limited to 'desktop-widgets/groupedlineedit.cpp')
| -rw-r--r-- | desktop-widgets/groupedlineedit.cpp | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/desktop-widgets/groupedlineedit.cpp b/desktop-widgets/groupedlineedit.cpp index fdce55ca4..5639b2e1b 100644 --- a/desktop-widgets/groupedlineedit.cpp +++ b/desktop-widgets/groupedlineedit.cpp @@ -161,7 +161,15 @@ void GroupedLineEdit::keyPressEvent(QKeyEvent *e) void GroupedLineEdit::paintEvent(QPaintEvent *e) { - QTextLine line = document()->findBlock(0).layout()->lineAt(0); + // Do some sanity checks. Without these, the code may crash if + // the user manages to scroll the text box by drag&drop actions. + const QTextBlock &block = document()->findBlock(0); + if (block.lineCount() <= 0) + return QPlainTextEdit::paintEvent(e); + const QTextLayout *layout = block.layout(); + if (layout->lineCount() <= 0) + return QPlainTextEdit::paintEvent(e); + QTextLine line = layout->lineAt(0); QPainter painter(viewport()); painter.setRenderHint(QPainter::Antialiasing, true); |