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| author | Thiago Macieira <thiago.macieira@intel.com> | 2025-07-15 14:57:20 -0700 |
|---|---|---|
| committer | Ivan Solovev <ivan.solovev@qt.io> | 2025-08-27 18:46:19 +0000 |
| commit | 02f5cc7ed218e663dd2da6388f7ef1504cd7cfef (patch) | |
| tree | 21828ec71fba7051594cdfe5e398f6b8653857f5 | |
| parent | da434e2defba42646c124e4f9778ce3d653b2c44 (diff) | |
Examples: don't overflow a QRect with adjusted()
Required after 1145e1709d1072f7dd45683e9c25a14615603854 made QRect use
QCheckedInt. We can avoid this by simply using QRectF one step earlier
in the calculation, which a) expands the range from ±2^31 to ±2^53 and
b) neatly avoids infinite zooming by not doing anything after 2^53
(because 2^53 + 1 = 2^53).
Fixes: QTBUG-138504
Pick-to: 6.10
Change-Id: Ibe382ad9b98bbfb9fde6fffd94bd733a4b999852
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
| -rw-r--r-- | examples/corelib/threads/mandelbrot/mandelbrotwidget.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/examples/corelib/threads/mandelbrot/mandelbrotwidget.cpp b/examples/corelib/threads/mandelbrot/mandelbrotwidget.cpp index bbe694831d2..5159a1aa685 100644 --- a/examples/corelib/threads/mandelbrot/mandelbrotwidget.cpp +++ b/examples/corelib/threads/mandelbrot/mandelbrotwidget.cpp @@ -76,8 +76,8 @@ void MandelbrotWidget::paintEvent(QPaintEvent * /* event */) painter.translate(newX, newY); painter.scale(scaleFactor, scaleFactor); - const QRectF exposed = painter.transform().inverted().mapRect(rect()) - .adjusted(-1, -1, 1, 1); + QRectF exposed = painter.transform().inverted().mapRect(rect()); + exposed = exposed.adjusted(-1, -1, 1, 1); painter.drawPixmap(exposed, previewPixmap, exposed); painter.restore(); } |