Add QtPaintDevice and initial QtWidget

common/helpers.h

@@ -1,6 +1,8 @@
 #import <ObjFW/ObjFW.h>
 
 #include <QString>
+#include <QSize>
+#include <QRect>
 
 inline OFString*
 QToOFString(const QString &qString)
@@ -13,3 +15,41 @@ OFToQString(OFString *string)
 {
 	return QString::fromUtf8([string UTF8String]);
 }
+
+inline of_dimension_t
+QToOFDimension(const QSize &qSize)
+{
+	return of_dimension(qSize.width(), qSize.height());
+}
+
+inline of_point_t
+QToOFPoint(const QPoint &qPoint)
+{
+	return of_point(qPoint.x(), qPoint.y());
+}
+
+inline QPoint
+OFToQPoint(of_point_t point)
+{
+	return QPoint(point.x, point.y);
+}
+
+inline QSize
+OFToQSize(of_dimension_t dimension)
+{
+	return QSize(dimension.width, dimension.height);
+}
+
+inline of_rectangle_t
+QToOFRectangle(const QRect &qRect)
+{
+	return of_rectangle(qRect.x(), qRect.y(),
+	    qRect.width(), qRect.height());
+}
+
+inline QRect
+OFToQRect(of_rectangle_t rectangle)
+{
+	return QRect(rectangle.origin.x, rectangle.origin.y,
+	    rectangle.size.width, rectangle.size.height);
+}