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Diffstat (limited to 'examples/widgets/itemviews/chart/pieview.cpp')
| -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 6e55afa5f0..9793e7d89b 100644 --- a/examples/widgets/itemviews/chart/pieview.cpp +++ b/examples/widgets/itemviews/chart/pieview.cpp @@ -38,8 +38,8 @@ ** ****************************************************************************/ -#include <math.h> #include <QtWidgets> +#include <cmath> #ifndef M_PI #define M_PI 3.1415927 @@ -109,13 +109,13 @@ QModelIndex PieView::indexAt(const QPoint &point) const double cy = totalSize / 2 - wy; // positive cy for items above the center // Determine the distance from the center point of the pie chart. - double d = pow(pow(cx, 2) + pow(cy, 2), 0.5); + double d = std::sqrt(std::pow(cx, 2) + std::pow(cy, 2)); if (d == 0 || d > pieSize / 2) return QModelIndex(); // Determine the angle of the point. - double angle = (180 / M_PI) * acos(cx / d); + double angle = (180 / M_PI) * std::acos(cx / d); if (cy < 0) angle = 360 - angle; |