彻底改版2.0

third/3rd_qwt/qwt_clipper.h

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+/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
+ * Qwt Widget Library
+ * Copyright (C) 1997   Josef Wilgen
+ * Copyright (C) 2002   Uwe Rathmann
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the Qwt License, Version 1.0
+ *****************************************************************************/
+
+#ifndef QWT_CLIPPER_H
+#define QWT_CLIPPER_H
+
+#include "qwt_global.h"
+#include "qwt_interval.h"
+#include <qpolygon.h>
+#include <qvector.h>
+
+class QRect;
+class QRectF;
+
+/*!
+  \brief Some clipping algorithms
+*/
+
+class QWT_EXPORT QwtClipper
+{
+public:
+    static QPolygon clipPolygon( const QRect &,
+        const QPolygon &, bool closePolygon = false );
+    static QPolygon clipPolygon( const QRectF &,
+        const QPolygon &, bool closePolygon = false );
+
+    static QPolygonF clipPolygonF( const QRectF &,
+        const QPolygonF &, bool closePolygon = false );
+
+    static QVector<QwtInterval> clipCircle(
+        const QRectF &, const QPointF &, double radius );
+};
+
+#endif