add vcglib

vcglib/wrap/qt/device_to_logical.h

@@ -0,0 +1,59 @@
+#ifndef DEVICE_TO_LOGICAL_H
+#define DEVICE_TO_LOGICAL_H
+#include <QWidget>
+#include <QPainter>
+#include <vcg/space/point2.h>
+
+template < class ValueType>
+inline ValueType QTLogicalToDevice( QWidget *qw, const ValueType &value)
+{
+#if QT_VERSION >= 0x050000
+  return value*qw->devicePixelRatio() ;
+#else
+  Q_UNUSED(qw);
+  return value;
+#endif
+}
+
+template < class ValueType>
+inline ValueType QTLogicalToDevice( QPainter *qp, const ValueType &value)
+{
+#if QT_VERSION >= 0x050000
+  return value*qp->device()->devicePixelRatio() ;
+#else
+  Q_UNUSED(qp);
+  return value;
+#endif
+}
+
+template < class ValueType>
+inline ValueType QTDeviceToLogical( QWidget *qw, const ValueType &value)
+{
+#if QT_VERSION >= 0x050000
+  return value/qw->devicePixelRatio() ;
+#else
+  Q_UNUSED(qw);
+  return value;
+#endif
+}
+
+template < class ValueType>
+inline ValueType QTDeviceToLogical( QPainter *qp, const ValueType &value)
+{
+#if QT_VERSION >= 0x050000
+  return value/qp->device()->devicePixelRatio() ;
+#else
+  Q_UNUSED(qp);
+  return value;
+#endif
+}
+
+inline vcg::Point2f QTLogicalToOpenGL( QWidget *qw, const QPoint &p)
+{
+  return vcg::Point2f(QTLogicalToDevice(qw,p.x()), QTLogicalToDevice(qw,qw->height()-p.y()));
+}
+
+
+inline int QTDeviceHeight(QWidget *qw) {return QTLogicalToDevice(qw,qw->height());}
+inline int QTDeviceWidth(QWidget *qw) {return QTLogicalToDevice(qw,qw->width());}
+#endif // DEVICE_TO_LOGICAL_H