From c1f9978c9d61bcbdb2f280185a3abdea13d7f532 Mon Sep 17 00:00:00 2001 From: Thierry Bastian Date: Thu, 30 Sep 2010 11:38:14 +0200 Subject: Fixed a layout issue where you could get NaN as dimensions The problem is that with empty layouts we could sometimes divide by 0. Note: This doesn't fix the whole task... Task-number: QTBUG-13547 Reviewed-by: ogoffart --- src/gui/graphicsview/qgridlayoutengine.cpp | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/src/gui/graphicsview/qgridlayoutengine.cpp b/src/gui/graphicsview/qgridlayoutengine.cpp index f3b2026..1e3addc 100644 --- a/src/gui/graphicsview/qgridlayoutengine.cpp +++ b/src/gui/graphicsview/qgridlayoutengine.cpp @@ -306,20 +306,19 @@ void QGridLayoutRowData::calculateGeometries(int start, int end, qreal targetSiz ultimatePreferredSize = ultimatePreferredSize * 3 / 2; ultimateSumPreferredSizes = ultimateSumPreferredSizes * 3 / 2; - qreal ultimateFactor = (stretch * ultimateSumPreferredSizes - / sumStretches) - - (box.q_preferredSize); - qreal transitionalFactor = sumCurrentAvailable - * (ultimatePreferredSize - box.q_preferredSize) - / (ultimateSumPreferredSizes - - sumPreferredSizes); - - qreal alpha = qMin(sumCurrentAvailable, - ultimateSumPreferredSizes - sumPreferredSizes); qreal beta = ultimateSumPreferredSizes - sumPreferredSizes; + if (!beta) { + factors[i] = 1; + } else { + qreal alpha = qMin(sumCurrentAvailable, beta); + qreal ultimateFactor = (stretch * ultimateSumPreferredSizes / sumStretches) + - (box.q_preferredSize); + qreal transitionalFactor = sumCurrentAvailable * (ultimatePreferredSize - box.q_preferredSize) / beta; + + factors[i] = ((alpha * ultimateFactor) + + ((beta - alpha) * transitionalFactor)) / beta; + } - factors[i] = ((alpha * ultimateFactor) - + ((beta - alpha) * transitionalFactor)) / beta; } sumFactors += factors[i]; if (desired < sumCurrentAvailable) -- cgit v0.12