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# qwt_rect.h

    00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
    00002  * Qwt Widget Library
    00003  * Copyright (C) 1997   Josef Wilgen
    00004  * Copyright (C) 2002   Uwe Rathmann
    00005  *
    00006  * This library is free software; you can redistribute it and/or
    00007  * modify it under the terms of the Qwt License, Version 1.0
    00008  *****************************************************************************/
    00009
    00010 #ifndef QWT_RECT_H
    00011 #define QWT_RECT_H
    00012
    00013 #include <qrect.h>
    00014 #include "qwt_global.h"
    00015 #include "qwt_polygon.h"
    00016
    00021 class QWT_EXPORT QwtRect : public QRect
    00022 {
    00023 public:
    00024     QwtRect();
    00025     QwtRect(const QRect &r);
    00026
    00027     QwtPolygon clip(const QwtPolygon &) const;
    00028
    00029 private:
    00030     enum Edge { Left, Top, Right, Bottom, NEdges };
    00031
    00032     void clipEdge(Edge, const QwtPolygon &, QwtPolygon &) const;
    00033     bool insideEdge(const QPoint &, Edge edge) const;
    00034     QPoint intersectEdge(const QPoint &p1,
    00035         const QPoint &p2, Edge edge) const;
    00036 };
    00037
    00038 #endif