qpolygon.cpp File Reference

#include "qpolygon.h"
#include "qrect.h"
#include "qdatastream.h"
#include "qmatrix.h"
#include "qdebug.h"
#include "qpainterpath.h"
#include "qvariant.h"
#include "qpainterpath_p.h"
#include "qbezier_p.h"
#include <stdarg.h>

Go to the source code of this file.

Functions
QDebug	operator<< (QDebug dbg, const QPolygon &a)
QDataStream &	operator<< (QDataStream &s, const QPolygon &a)
QDataStream &	operator<< (QDataStream &s, const QPolygonF &a)
QDebug	operator<< (QDebug dbg, const QPolygonF &a)
QDataStream &	operator>> (QDataStream &s, QPolygon &a)
QDataStream &	operator>> (QDataStream &s, QPolygonF &a)
static void	qt_polygon_isect_line (const QPointF &p1, const QPointF &p2, const QPointF &pos, int *winding)

Function Documentation

operator<<() [1/4]

QDebug operator<<	(	QDebug	dbg,
		const QPolygon &	a
	)

Definition at line 516 of file qpolygon.cpp.

{
#ifndef Q_BROKEN_DEBUG_STREAM
    dbg.nospace() << "QPolygon(";
    for (int i = 0; i < a.count(); ++i)
        dbg.nospace() << a.at(i);
    dbg.nospace() << ')';
    return dbg.space();
#else
    qWarning("This compiler doesn't support streaming QPolygon to QDebug");
    return dbg;
    Q_UNUSED(a);
#endif
}

operator<<() [2/4]

QDataStream& operator<< ( QDataStream &  s, const QPolygon &  a  )

related

Definition at line 828 of file qpolygon.cpp.

{
    const QVector<QPoint> &v = a;
    return s << v;
}

operator<<() [3/4]

QDataStream& operator<< ( QDataStream &  s, const QPolygonF &  a  )

related

Definition at line 871 of file qpolygon.cpp.

{
    quint32 len = a.size();
    uint i;

    s << len;
    for (i = 0; i < len; ++i)
        s << a.at(i);
    return s;
}

operator<<() [4/4]

QDebug operator<<	(	QDebug	dbg,
		const QPolygonF &	a
	)

Definition at line 912 of file qpolygon.cpp.

{
#ifndef Q_BROKEN_DEBUG_STREAM
    dbg.nospace() << "QPolygonF(";
    for (int i = 0; i < a.count(); ++i)
        dbg.nospace() << a.at(i);
    dbg.nospace() << ')';
    return dbg.space();
#else
    qWarning("This compiler doesn't support streaming QPolygonF to QDebug");
    return dbg;
    Q_UNUSED(a);
#endif
}

operator>>() [1/2]

QDataStream& operator>> ( QDataStream &  s, QPolygon &  a  )

related

Definition at line 847 of file qpolygon.cpp.

{
    QVector<QPoint> &v = a;
    return s >> v;
}

operator>>() [2/2]

QDataStream& operator>> ( QDataStream &  s, QPolygonF &  a  )

related

Definition at line 895 of file qpolygon.cpp.

{
    quint32 len;
    uint i;

    s >> len;
    a.reserve(a.size() + (int)len);
    QPointF p;
    for (i = 0; i < len; ++i) {
        s >> p;
        a.insert(i, p);
    }
    return s;
}

qt_polygon_isect_line()

static void qt_polygon_isect_line ( const QPointF &  p1, const QPointF &  p2, const QPointF &  pos, int *  winding  )

static

Definition at line 57 of file qpolygon.cpp.

Referenced by QPolygon::containsPoint(), and QPolygonF::containsPoint().

{
    qreal x1 = p1.x();
    qreal y1 = p1.y();
    qreal x2 = p2.x();
    qreal y2 = p2.y();
    qreal y = pos.y();

    int dir = 1;

    if (qFuzzyCompare(y1, y2)) {
        // ignore horizontal lines according to scan conversion rule
        return;
    } else if (y2 < y1) {
        qreal x_tmp = x2; x2 = x1; x1 = x_tmp;
        qreal y_tmp = y2; y2 = y1; y1 = y_tmp;
        dir = -1;
    }

    if (y >= y1 && y < y2) {
        qreal x = x1 + ((x2 - x1) / (y2 - y1)) * (y - y1);

        // count up the winding number if we're
        if (x<=pos.x()) {
            (*winding) += dir;
        }
    }
}