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| author | Olivier Goffart <ogoffart@woboq.com> | 2012-08-16 09:55:50 +0200 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-08-23 23:31:10 +0200 |
| commit | 4d5f3cf6275df46e8ebe262026a392a8154cf36a (patch) | |
| tree | 510598f552ca10c836789f02b0db8f5d35f9ad5b /tests | |
| parent | b1e082ec9f4ec0a603f69e280fe2c5438c67a09e (diff) | |
Test for quadratic behaviour when rendering long line in QTextEdit
QTextEdit showing long lines using lots of text format (for example
with a syntax highlighter) used to expose a quadratic behaviour which
make it impossible to edit files with long lines.
It was fiexed in the few previous commit
Task-number: QTBUG-8389
Change-Id: Ib7203497a7699a85ae1dfb70fe65d5fb36884b58
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/auto/widgets/widgets/qtextedit/tst_qtextedit.cpp | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/tests/auto/widgets/widgets/qtextedit/tst_qtextedit.cpp b/tests/auto/widgets/widgets/qtextedit/tst_qtextedit.cpp index 846bb41181..7d6428211f 100644 --- a/tests/auto/widgets/widgets/qtextedit/tst_qtextedit.cpp +++ b/tests/auto/widgets/widgets/qtextedit/tst_qtextedit.cpp @@ -62,6 +62,7 @@ #include <qabstracttextdocumentlayout.h> #include <qtextdocumentfragment.h> +#include <qsyntaxhighlighter.h> #include "../../../shared/platforminputcontext.h" #include <private/qinputmethod_p.h> @@ -212,6 +213,8 @@ private slots: void inputMethodQueryImHints_data(); void inputMethodQueryImHints(); + void highlightLongLine(); + private: void createSelection(); int blockCount() const; @@ -2483,5 +2486,38 @@ void tst_QTextEdit::inputMethodQueryImHints() QCOMPARE(static_cast<Qt::InputMethodHints>(value.toInt()), hints); } +void tst_QTextEdit::highlightLongLine() +{ + QTextEdit edit; + edit.setAcceptRichText(false); + edit.setWordWrapMode(QTextOption::NoWrap); + + QString singeLongLine; + for (int i = 0; i < 10000; ++i) + singeLongLine += "0123456789"; + edit.setPlainText(singeLongLine); + + class NumHighlighter : public QSyntaxHighlighter { + public: + explicit NumHighlighter(QTextDocument*doc) : QSyntaxHighlighter(doc) {}; + virtual void highlightBlock(const QString& text) { + // odd number in bold + QTextCharFormat format; + format.setFontWeight(QFont::Bold); + for (int i = 0; i < text.size(); ++i) { + if (text.at(i).unicode() % 2) + setFormat(i, 1, format); + } + } + }; + NumHighlighter nh(edit.document()); + edit.show(); + QTest::qWaitForWindowActive(edit.windowHandle()); + QCoreApplication::processEvents(); + //If there is a quadratic behaviour, this would take forever. + QVERIFY(true); +} + + QTEST_MAIN(tst_QTextEdit) #include "tst_qtextedit.moc" |