diff options
Diffstat (limited to 'examples/widgets/itemviews')
| -rw-r--r-- | examples/widgets/itemviews/chart/pieview.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/examples/widgets/itemviews/chart/pieview.cpp b/examples/widgets/itemviews/chart/pieview.cpp index fb439fae67..942bbe5ca5 100644 --- a/examples/widgets/itemviews/chart/pieview.cpp +++ b/examples/widgets/itemviews/chart/pieview.cpp @@ -125,9 +125,9 @@ QModelIndex PieView::indexAt(const QPoint &point) const return QModelIndex(); // Determine the angle of the point. - double angle = (180 / M_PI) * std::acos(cx / d); - if (cy < 0) - angle = 360 - angle; + double angle = (180 / M_PI) * std::atan2(cy, cx); + if (angle < 0) + angle = 360 + angle; // Find the relevant slice of the pie. double startAngle = 0.0; |