diff options
Diffstat (limited to 'src/gui/doc/snippets/transform/main.cpp')
| -rw-r--r-- | src/gui/doc/snippets/transform/main.cpp | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/src/gui/doc/snippets/transform/main.cpp b/src/gui/doc/snippets/transform/main.cpp index f3b31b0f83..d15b059020 100644 --- a/src/gui/doc/snippets/transform/main.cpp +++ b/src/gui/doc/snippets/transform/main.cpp @@ -48,6 +48,7 @@ ** ****************************************************************************/ #include <QApplication> +#include <QMath> #include <QPainter> #include <QVBoxLayout> #include <QWidget> @@ -105,18 +106,15 @@ class BasicOperations : public QWidget //! [2] void BasicOperations::paintEvent(QPaintEvent *) { - double pi = 3.14; - - double a = pi/180 * 45.0; + const double a = qDegreesToRadians(45.0); double sina = sin(a); double cosa = cos(a); - QTransform translationTransform(1, 0, 0, 1, 50.0, 50.0); - QTransform rotationTransform(cosa, sina, -sina, cosa, 0, 0); - QTransform scalingTransform(0.5, 0, 0, 1.0, 0, 0); + QTransform scale(0.5, 0, 0, 1.0, 0, 0); + QTransform rotate(cosa, sina, -sina, cosa, 0, 0); + QTransform translate(1, 0, 0, 1, 50.0, 50.0); - QTransform transform; - transform = scalingTransform * rotationTransform * translationTransform; + QTransform transform = scale * rotate * translate; QPainter painter(this); painter.setPen(QPen(Qt::blue, 1, Qt::DashLine)); |