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Q(Plain)TextEdit: don't crash when using a style sheet

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When using a style sheet, Q(Plain)TextEdit::isReadOnly() might get
called during the initialization before d->control is properly
initialized which lead to a crash.
This amends 43ce457cbd093fc06d99b5ac833c789ef7c893d5.

Fixes: QTBUG-121697
Fixes: QTBUG-121790
Task-number: QTBUG-1857
Pick-to: 6.7 6.6.2 6.6 6.5 6.2
Change-Id: I15c357c9eef7f6559bcc2ad89033a3d8e7fcbfef
Reviewed-by: David Faure <david.faure@kdab.com>
This commit is contained in:
Christian Ehrlicher 2024-02-05 19:42:45 +01:00
parent 4370532500
commit c6af5b9c12
4 changed files with 23 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/widgets/widgets/qplaintextedit.cpp
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@ -2600,7 +2600,7 @@ void QPlainTextEdit::insertFromMimeData(const QMimeData *source)
bool QPlainTextEdit::isReadOnly() const bool QPlainTextEdit::isReadOnly() const
{ {
Q_D(const QPlainTextEdit); Q_D(const QPlainTextEdit);
return !(d->control->textInteractionFlags() & Qt::TextEditable); return !d->control || !(d->control->textInteractionFlags() & Qt::TextEditable);
} }
void QPlainTextEdit::setReadOnly(bool ro) void QPlainTextEdit::setReadOnly(bool ro)

2
src/widgets/widgets/qtextedit.cpp
View File

@ -2222,7 +2222,7 @@ void QTextEdit::insertFromMimeData(const QMimeData *source)
bool QTextEdit::isReadOnly() const bool QTextEdit::isReadOnly() const
{ {
Q_D(const QTextEdit); Q_D(const QTextEdit);
return !(d->control->textInteractionFlags() & Qt::TextEditable); return !d->control || !(d->control->textInteractionFlags() & Qt::TextEditable);
} }
void QTextEdit::setReadOnly(bool ro) void QTextEdit::setReadOnly(bool ro)

10
tests/auto/widgets/widgets/qplaintextedit/tst_qplaintextedit.cpp
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@ -133,6 +133,7 @@ private slots:
void placeholderVisibility_data(); void placeholderVisibility_data();
void placeholderVisibility(); void placeholderVisibility();
void scrollBarSignals(); void scrollBarSignals();
void dontCrashWithCss();
private: private:
void createSelection(); void createSelection();
@ -1944,5 +1945,14 @@ void tst_QPlainTextEdit::scrollBarSignals()
QTRY_COMPARE(spy.count(), 5); QTRY_COMPARE(spy.count(), 5);
} }
void tst_QPlainTextEdit::dontCrashWithCss()
{
qApp->setStyleSheet("QWidget { font: 10pt; }");
QPlainTextEdit edit;
edit.show();
qApp->setStyleSheet(QString());
}
QTEST_MAIN(tst_QPlainTextEdit) QTEST_MAIN(tst_QPlainTextEdit)
#include "tst_qplaintextedit.moc" #include "tst_qplaintextedit.moc"

11
tests/auto/widgets/widgets/qtextedit/tst_qtextedit.cpp
View File

@ -198,6 +198,8 @@ private slots:
void nextFormatAfterEnterPressed_data(); void nextFormatAfterEnterPressed_data();
void nextFormatAfterEnterPressed(); void nextFormatAfterEnterPressed();
void dontCrashWithCss();
private: private:
void createSelection(); void createSelection();
int blockCount() const; int blockCount() const;
@ -3064,5 +3066,14 @@ void tst_QTextEdit::nextFormatAfterEnterPressed()
QCOMPARE(prevBlockCursor.charFormat().property(it.key()), it.value()); QCOMPARE(prevBlockCursor.charFormat().property(it.key()), it.value());
} }
void tst_QTextEdit::dontCrashWithCss()
{
qApp->setStyleSheet("QWidget { font: 10pt; }");
QTextEdit edit;
edit.show();
qApp->setStyleSheet(QString());
}
QTEST_MAIN(tst_QTextEdit) QTEST_MAIN(tst_QTextEdit)
#include "tst_qtextedit.moc" #include "tst_qtextedit.moc"