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#include "qdrawutil.h"
#include "qbitmap.h"
#include "qpixmapcache.h"
#include "qapplication.h"
#include "qpainter.h"
#include "qpalette.h"

QT_BEGIN_NAMESPACE

/*!
    \fn void qDrawShadeLine(QPainter *painter, int x1, int y1, int x2, int y2,
                     const QPalette &palette, bool sunken,
                     int lineWidth, int midLineWidth)
    \relates QPainter

    Draws a horizontal (\a y1 == \a y2) or vertical (\a x1 == \a x2)
    shaded line using the given \a painter.  Note that nothing is
    drawn if \a y1 != \a y2 and \a x1 != \a x2 (i.e. the line is
    neither horizontal nor vertical).

    The provided \a palette specifies the shading colors (\l
    {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l
    {QPalette::mid()}{middle} colors).  The given \a lineWidth
    specifies the line width for each of the lines; it is not the
    total line width. The given \a midLineWidth specifies the width of
    a middle line drawn in the QPalette::mid() color.

    The line appears sunken if \a sunken is true, otherwise raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style().  Use the drawing functions in QStyle to
    make widgets that follow the current GUI style.


    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a shaded line:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 0

    \sa qDrawShadeRect(), qDrawShadePanel(), QStyle
*/

void qDrawShadeLine(QPainter *p, int x1, int y1, int x2, int y2,
                     const QPalette &pal, bool sunken,
                     int lineWidth, int midLineWidth)
{
    if (!(p && lineWidth >= 0 && midLineWidth >= 0))        {
        qWarning("qDrawShadeLine: Invalid parameters");
        return;
    }
    int tlw = lineWidth*2 + midLineWidth;        // total line width
    QPen oldPen = p->pen();                        // save pen
    if (sunken)
        p->setPen(pal.color(QPalette::Dark));
    else
        p->setPen(pal.light().color());
    QPolygon a;
    int i;
    if (y1 == y2) {                                // horizontal line
        int y = y1 - tlw/2;
        if (x1 > x2) {                        // swap x1 and x2
            int t = x1;
            x1 = x2;
            x2 = t;
        }
        x2--;
        for (i=0; i<lineWidth; i++) {                // draw top shadow
            a.setPoints(3, x1+i, y+tlw-1-i,
                         x1+i, y+i,
                         x2-i, y+i);
            p->drawPolyline(a);
        }
        if (midLineWidth > 0) {
            p->setPen(pal.mid().color());
            for (i=0; i<midLineWidth; i++)        // draw lines in the middle
                p->drawLine(x1+lineWidth, y+lineWidth+i,
                             x2-lineWidth, y+lineWidth+i);
        }
        if (sunken)
            p->setPen(pal.light().color());
        else
            p->setPen(pal.dark().color());
        for (i=0; i<lineWidth; i++) {                // draw bottom shadow
            a.setPoints(3, x1+i, y+tlw-i-1,
                         x2-i, y+tlw-i-1,
                         x2-i, y+i+1);
            p->drawPolyline(a);
        }
    }
    else if (x1 == x2) {                        // vertical line
        int x = x1 - tlw/2;
        if (y1 > y2) {                        // swap y1 and y2
            int t = y1;
            y1 = y2;
            y2 = t;
        }
        y2--;
        for (i=0; i<lineWidth; i++) {                // draw left shadow
            a.setPoints(3, x+i, y2,
                         x+i, y1+i,
                         x+tlw-1, y1+i);
            p->drawPolyline(a);
        }
        if (midLineWidth > 0) {
            p->setPen(pal.mid().color());
            for (i=0; i<midLineWidth; i++)        // draw lines in the middle
                p->drawLine(x+lineWidth+i, y1+lineWidth, x+lineWidth+i, y2);
        }
        if (sunken)
            p->setPen(pal.light().color());
        else
            p->setPen(pal.dark().color());
        for (i=0; i<lineWidth; i++) {                // draw right shadow
            a.setPoints(3, x+lineWidth, y2-i,
                         x+tlw-i-1, y2-i,
                         x+tlw-i-1, y1+lineWidth);
            p->drawPolyline(a);
        }
    }
    p->setPen(oldPen);
}

/*!
    \fn void qDrawShadeRect(QPainter *painter, int x, int y, int width, int height,
                     const QPalette &palette, bool sunken,
                     int lineWidth, int midLineWidth,
                     const QBrush *fill)
    \relates QPainter

    Draws the shaded rectangle beginning at (\a x, \a y) with the
    given \a width and \a height using the provided \a painter.

    The provide \a palette specifies the shading colors (\l
    {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l
    {QPalette::mid()}{middle} colors.  The given \a lineWidth
    specifies the line width for each of the lines; it is not the
    total line width.  The \a midLineWidth specifies the width of a
    middle line drawn in the QPalette::mid() color.  The rectangle's
    interior is filled with the \a fill brush unless \a fill is 0.

    The rectangle appears sunken if \a sunken is true, otherwise
    raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style(). Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a shaded rectangle:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 1

    \sa qDrawShadeLine(), qDrawShadePanel(), qDrawPlainRect(), QStyle
*/

void qDrawShadeRect(QPainter *p, int x, int y, int w, int h,
                     const QPalette &pal, bool sunken,
                     int lineWidth, int midLineWidth,
                     const QBrush *fill)
{
    if (w == 0 || h == 0)
        return;
    if (! (w > 0 && h > 0 && lineWidth >= 0 && midLineWidth >= 0)) {
        qWarning("qDrawShadeRect: Invalid parameters");
        return;
    }
    QPen oldPen = p->pen();
    if (sunken)
        p->setPen(pal.dark().color());
    else
        p->setPen(pal.light().color());
    int x1=x, y1=y, x2=x+w-1, y2=y+h-1;

    if (lineWidth == 1 && midLineWidth == 0) {// standard shade rectangle
        p->drawRect(x1, y1, w-2, h-2);
        if (sunken)
            p->setPen(pal.light().color());
        else
            p->setPen(pal.dark().color());
        QLineF lines[4] = { QLineF(x1+1, y1+1, x2-2, y1+1),
                            QLineF(x1+1, y1+2, x1+1, y2-2),
                            QLineF(x1, y2, x2, y2),
                            QLineF(x2,y1, x2,y2-1) };
        p->drawLines(lines, 4);              // draw bottom/right lines
    } else {                                        // more complicated
        int m = lineWidth+midLineWidth;
        int i, j=0, k=m;
        for (i=0; i<lineWidth; i++) {                // draw top shadow
            QLineF lines[4] = { QLineF(x1+i, y2-i, x1+i, y1+i),
                                QLineF(x1+i, y1+i, x2-i, y1+i),
                                QLineF(x1+k, y2-k, x2-k, y2-k),
                                QLineF(x2-k, y2-k, x2-k, y1+k) };
            p->drawLines(lines, 4);
            k++;
        }
        p->setPen(pal.mid().color());
        j = lineWidth*2;
        for (i=0; i<midLineWidth; i++) {        // draw lines in the middle
            p->drawRect(x1+lineWidth+i, y1+lineWidth+i, w-j-1, h-j-1);
            j += 2;
        }
        if (sunken)
            p->setPen(pal.light().color());
        else
            p->setPen(pal.dark().color());
        k = m;
        for (i=0; i<lineWidth; i++) {                // draw bottom shadow
            QLineF lines[4] = { QLineF(x1+1+i, y2-i, x2-i, y2-i),
                                QLineF(x2-i, y2-i, x2-i, y1+i+1),
                                QLineF(x1+k, y2-k, x1+k, y1+k),
                                QLineF(x1+k, y1+k, x2-k, y1+k) };
            p->drawLines(lines, 4);
            k++;
        }
    }
    if (fill) {
        QBrush oldBrush = p->brush();
        int tlw = lineWidth + midLineWidth;
        p->setPen(Qt::NoPen);
        p->setBrush(*fill);
        p->drawRect(x+tlw, y+tlw, w-2*tlw, h-2*tlw);
        p->setBrush(oldBrush);
    }
    p->setPen(oldPen);                        // restore pen
}


/*!
    \fn void qDrawShadePanel(QPainter *painter, int x, int y, int width, int height,
                      const QPalette &palette, bool sunken,
                      int lineWidth, const QBrush *fill)
    \relates QPainter

    Draws the shaded panel beginning at (\a x, \a y) with the given \a
    width and \a height using the provided \a painter and the given \a
    lineWidth.

    The given \a palette specifies the shading colors (\l
    {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l
    {QPalette::mid()}{middle} colors).  The panel's interior is filled
    with the \a fill brush unless \a fill is 0.

    The panel appears sunken if \a sunken is true, otherwise raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style(). Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a shaded panel:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 2

    \sa qDrawWinPanel(), qDrawShadeLine(), qDrawShadeRect(), QStyle
*/

void qDrawShadePanel(QPainter *p, int x, int y, int w, int h,
                      const QPalette &pal, bool sunken,
                      int lineWidth, const QBrush *fill)
{
    if (w == 0 || h == 0)
        return;
    if (!(w > 0 && h > 0 && lineWidth >= 0)) {
        qWarning("qDrawShadePanel: Invalid parameters");
    }
    QColor shade = pal.dark().color();
    QColor light = pal.light().color();
    if (fill) {
        if (fill->color() == shade)
            shade = pal.shadow().color();
        if (fill->color() == light)
            light = pal.midlight().color();
    }
    QPen oldPen = p->pen();                        // save pen
    QVector<QLineF> lines;
    lines.reserve(2*lineWidth);

    if (sunken)
        p->setPen(shade);
    else
        p->setPen(light);
    int x1, y1, x2, y2;
    int i;
    x1 = x;
    y1 = y2 = y;
    x2 = x+w-2;
    for (i=0; i<lineWidth; i++) {                // top shadow
        lines << QLineF(x1, y1++, x2--, y2++);
    }
    x2 = x1;
    y1 = y+h-2;
    for (i=0; i<lineWidth; i++) {                // left shado
        lines << QLineF(x1++, y1, x2++, y2--);
    }
    p->drawLines(lines);
    lines.clear();
    if (sunken)
        p->setPen(light);
    else
        p->setPen(shade);
    x1 = x;
    y1 = y2 = y+h-1;
    x2 = x+w-1;
    for (i=0; i<lineWidth; i++) {                // bottom shadow
        lines << QLineF(x1++, y1--, x2, y2--);
    }
    x1 = x2;
    y1 = y;
    y2 = y+h-lineWidth-1;
    for (i=0; i<lineWidth; i++) {                // right shadow
        lines << QLineF(x1--, y1++, x2--, y2);
    }
    p->drawLines(lines);
    if (fill)                                // fill with fill color
        p->fillRect(x+lineWidth, y+lineWidth, w-lineWidth*2, h-lineWidth*2, *fill);
    p->setPen(oldPen);                        // restore pen
}


/*!
  \internal
  This function draws a rectangle with two pixel line width.
  It is called from qDrawWinButton() and qDrawWinPanel().

  c1..c4 and fill are used:

    1 1 1 1 1 2
    1 3 3 3 4 2
    1 3 F F 4 2
    1 3 F F 4 2
    1 4 4 4 4 2
    2 2 2 2 2 2
*/

static void qDrawWinShades(QPainter *p,
                           int x, int y, int w, int h,
                           const QColor &c1, const QColor &c2,
                           const QColor &c3, const QColor &c4,
                           const QBrush *fill)
{
    if (w < 2 || h < 2)                        // can't do anything with that
        return;
    QPen oldPen = p->pen();
    QPoint a[3] = { QPoint(x, y+h-2), QPoint(x, y), QPoint(x+w-2, y) };
    p->setPen(c1);
    p->drawPolyline(a, 3);
    QPoint b[3] = { QPoint(x, y+h-1), QPoint(x+w-1, y+h-1), QPoint(x+w-1, y) };
    p->setPen(c2);
    p->drawPolyline(b, 3);
    if (w > 4 && h > 4) {
        QPoint c[3] = { QPoint(x+1, y+h-3), QPoint(x+1, y+1), QPoint(x+w-3, y+1) };
        p->setPen(c3);
        p->drawPolyline(c, 3);
        QPoint d[3] = { QPoint(x+1, y+h-2), QPoint(x+w-2, y+h-2), QPoint(x+w-2, y+1) };
        p->setPen(c4);
        p->drawPolyline(d, 3);
        if (fill)
            p->fillRect(QRect(x+2, y+2, w-4, h-4), *fill);
    }
    p->setPen(oldPen);
}


/*!
    \fn void qDrawWinButton(QPainter *painter, int x, int y, int width, int height,
                     const QPalette &palette, bool sunken,
                     const QBrush *fill)
    \relates QPainter

    Draws the Windows-style button specified by the given point (\a x,
    \a y}, \a width and \a height using the provided \a painter with a
    line width of 2 pixels. The button's interior is filled with the
    \a{fill} brush unless \a fill is 0.

    The given \a palette specifies the shading colors (\l
    {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l
    {QPalette::mid()}{middle} colors).

    The button appears sunken if \a sunken is true, otherwise raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style()-> Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    \sa qDrawWinPanel(), QStyle
*/

void qDrawWinButton(QPainter *p, int x, int y, int w, int h,
                     const QPalette &pal, bool sunken,
                     const QBrush *fill)
{
    if (sunken)
        qDrawWinShades(p, x, y, w, h,
                       pal.shadow().color(), pal.light().color(), pal.dark().color(),
                       pal.button().color(), fill);
    else
        qDrawWinShades(p, x, y, w, h,
                       pal.light().color(), pal.shadow().color(), pal.button().color(),
                       pal.dark().color(), fill);
}

/*!
    \fn void qDrawWinPanel(QPainter *painter, int x, int y, int width, int height,
                    const QPalette &palette, bool        sunken,
                    const QBrush *fill)
    \relates QPainter

    Draws the Windows-style panel specified by the given point(\a x,
    \a y), \a width and \a height using the provided \a painter with a
    line width of 2 pixels. The button's interior is filled with the
    \a fill brush unless \a fill is 0.

    The given \a palette specifies the shading colors.  The panel
    appears sunken if \a sunken is true, otherwise raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style(). Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a shaded panel:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 3

    \sa qDrawShadePanel(), qDrawWinButton(), QStyle
*/

void qDrawWinPanel(QPainter *p, int x, int y, int w, int h,
                    const QPalette &pal, bool        sunken,
                    const QBrush *fill)
{
    if (sunken)
        qDrawWinShades(p, x, y, w, h,
                        pal.dark().color(), pal.light().color(), pal.shadow().color(),
                       pal.midlight().color(), fill);
    else
        qDrawWinShades(p, x, y, w, h,
                       pal.light().color(), pal.shadow().color(), pal.midlight().color(),
                       pal.dark().color(), fill);
}

/*!
    \fn void qDrawPlainRect(QPainter *painter, int x, int y, int width, int height, const QColor &lineColor,
                     int lineWidth, const QBrush *fill)
    \relates QPainter

    Draws the plain rectangle beginning at (\a x, \a y) with the given
    \a width and \a height, using the specified \a painter, \a lineColor
    and \a lineWidth. The rectangle's interior is filled with the \a
    fill brush unless \a fill is 0.

    \warning This function does not look at QWidget::style() or
    QApplication::style(). Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a plain rectangle:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 4

    \sa qDrawShadeRect(), QStyle
*/

void qDrawPlainRect(QPainter *p, int x, int y, int w, int h, const QColor &c,
                     int lineWidth, const QBrush *fill)
{
    if (w == 0 || h == 0)
        return;
    if (!(w > 0 && h > 0 && lineWidth >= 0)) {
        qWarning("qDrawPlainRect: Invalid parameters");
    }
    QPen   oldPen   = p->pen();
    QBrush oldBrush = p->brush();
    p->setPen(c);
    p->setBrush(Qt::NoBrush);
    for (int i=0; i<lineWidth; i++)
        p->drawRect(x+i, y+i, w-i*2 - 1, h-i*2 - 1);
    if (fill) {                                // fill with fill color
        p->setPen(Qt::NoPen);
        p->setBrush(*fill);
        p->drawRect(x+lineWidth, y+lineWidth, w-lineWidth*2, h-lineWidth*2);
    }
    p->setPen(oldPen);
    p->setBrush(oldBrush);
}

/*****************************************************************************
  Overloaded functions.
 *****************************************************************************/

/*!
    \fn void qDrawShadeLine(QPainter *painter, const QPoint &p1, const QPoint &p2,
             const QPalette &palette, bool sunken, int lineWidth, int midLineWidth)
    \relates QPainter
    \overload

    Draws a horizontal or vertical shaded line between \a p1 and \a p2
    using the given \a painter.  Note that nothing is drawn if the line
    between the points would be neither horizontal nor vertical.

    The provided \a palette specifies the shading colors (\l
    {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l
    {QPalette::mid()}{middle} colors).  The given \a lineWidth
    specifies the line width for each of the lines; it is not the
    total line width. The given \a midLineWidth specifies the width of
    a middle line drawn in the QPalette::mid() color.

    The line appears sunken if \a sunken is true, otherwise raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style().  Use the drawing functions in QStyle to
    make widgets that follow the current GUI style.


    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a shaded line:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 5

    \sa qDrawShadeRect(), qDrawShadePanel(), QStyle
*/

void qDrawShadeLine(QPainter *p, const QPoint &p1, const QPoint &p2,
                     const QPalette &pal, bool sunken,
                     int lineWidth, int midLineWidth)
{
    qDrawShadeLine(p, p1.x(), p1.y(), p2.x(), p2.y(), pal, sunken,
                    lineWidth, midLineWidth);
}

/*!
    \fn void qDrawShadeRect(QPainter *painter, const QRect &rect, const QPalette &palette,
             bool sunken, int lineWidth, int midLineWidth, const QBrush *fill)
    \relates QPainter
    \overload

    Draws the shaded rectangle specified by \a rect using the given \a painter.

    The provide \a palette specifies the shading colors (\l
    {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l
    {QPalette::mid()}{middle} colors.  The given \a lineWidth
    specifies the line width for each of the lines; it is not the
    total line width.  The \a midLineWidth specifies the width of a
    middle line drawn in the QPalette::mid() color.  The rectangle's
    interior is filled with the \a fill brush unless \a fill is 0.

    The rectangle appears sunken if \a sunken is true, otherwise
    raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style(). Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a shaded rectangle:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 6

    \sa qDrawShadeLine(), qDrawShadePanel(), qDrawPlainRect(), QStyle
*/

void qDrawShadeRect(QPainter *p, const QRect &r,
                     const QPalette &pal, bool sunken,
                     int lineWidth, int midLineWidth,
                     const QBrush *fill)
{
    qDrawShadeRect(p, r.x(), r.y(), r.width(), r.height(), pal, sunken,
                    lineWidth, midLineWidth, fill);
}

/*!
    \fn void qDrawShadePanel(QPainter *painter, const QRect &rect, const QPalette &palette,
             bool sunken, int lineWidth, const QBrush *fill)
    \relates QPainter
    \overload

    Draws the shaded panel at the rectangle specified by \a rect using the
    given \a painter and the given \a lineWidth.

    The given \a palette specifies the shading colors (\l
    {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l
    {QPalette::mid()}{middle} colors).  The panel's interior is filled
    with the \a fill brush unless \a fill is 0.

    The panel appears sunken if \a sunken is true, otherwise raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style(). Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a shaded panel:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 7

    \sa qDrawWinPanel(), qDrawShadeLine(), qDrawShadeRect(), QStyle
*/

void qDrawShadePanel(QPainter *p, const QRect &r,
                      const QPalette &pal, bool sunken,
                      int lineWidth, const QBrush *fill)
{
    qDrawShadePanel(p, r.x(), r.y(), r.width(), r.height(), pal, sunken,
                     lineWidth, fill);
}

/*!
    \fn void qDrawWinButton(QPainter *painter, const QRect &rect, const QPalette &palette,
             bool sunken, const QBrush *fill)
    \relates QPainter
    \overload

    Draws the Windows-style button at the rectangle specified by \a rect using
    the given \a painter with a line width of 2 pixels. The button's interior
    is filled with the \a{fill} brush unless \a fill is 0.

    The given \a palette specifies the shading colors (\l
    {QPalette::light()}{light}, \l {QPalette::dark()}{dark} and \l
    {QPalette::mid()}{middle} colors).

    The button appears sunken if \a sunken is true, otherwise raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style()-> Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    \sa qDrawWinPanel(), QStyle
*/

void qDrawWinButton(QPainter *p, const QRect &r,
                     const QPalette &pal, bool sunken, const QBrush *fill)
{
    qDrawWinButton(p, r.x(), r.y(), r.width(), r.height(), pal, sunken, fill);
}

/*!
    \fn void qDrawWinPanel(QPainter *painter, const QRect &rect, const QPalette &palette,
             bool sunken, const QBrush *fill)
    \overload

    Draws the Windows-style panel at the rectangle specified by \a rect using
    the given \a painter with a line width of 2 pixels. The button's interior
    is filled with the \a fill brush unless \a fill is 0.

    The given \a palette specifies the shading colors.  The panel
    appears sunken if \a sunken is true, otherwise raised.

    \warning This function does not look at QWidget::style() or
    QApplication::style(). Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a shaded panel:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 8

    \sa qDrawShadePanel(), qDrawWinButton(), QStyle
*/

void qDrawWinPanel(QPainter *p, const QRect &r,
                    const QPalette &pal, bool sunken, const QBrush *fill)
{
    qDrawWinPanel(p, r.x(), r.y(), r.width(), r.height(), pal, sunken, fill);
}

/*!
    \fn void qDrawPlainRect(QPainter *painter, const QRect &rect, const QColor &lineColor, int lineWidth, const QBrush *fill)
    \relates QPainter
    \overload

    Draws the plain rectangle specified by \a rect using the given \a painter,
    \a lineColor and \a lineWidth. The rectangle's interior is filled with the
    \a fill brush unless \a fill is 0.

    \warning This function does not look at QWidget::style() or
    QApplication::style(). Use the drawing functions in QStyle to make
    widgets that follow the current GUI style.

    Alternatively you can use a QFrame widget and apply the
    QFrame::setFrameStyle() function to display a plain rectangle:

    \snippet doc/src/snippets/code/src_gui_painting_qdrawutil.cpp 9

    \sa qDrawShadeRect(), QStyle
*/

void qDrawPlainRect(QPainter *p, const QRect &r, const QColor &c,
                     int lineWidth, const QBrush *fill)
{
    qDrawPlainRect(p, r.x(), r.y(), r.width(), r.height(), c,
                    lineWidth, fill);
}

#ifdef QT3_SUPPORT
static void qDrawWinArrow(QPainter *p, Qt::ArrowType type, bool down,
                           int x, int y, int w, int h,
                           const QPalette &pal, bool enabled)
{
    QPolygon a;                                // arrow polygon
    switch (type) {
    case Qt::UpArrow:
        a.setPoints(7, -3,1, 3,1, -2,0, 2,0, -1,-1, 1,-1, 0,-2);
        break;
    case Qt::DownArrow:
        a.setPoints(7, -3,-1, 3,-1, -2,0, 2,0, -1,1, 1,1, 0,2);
        break;
    case Qt::LeftArrow:
        a.setPoints(7, 1,-3, 1,3, 0,-2, 0,2, -1,-1, -1,1, -2,0);
        break;
    case Qt::RightArrow:
        a.setPoints(7, -1,-3, -1,3, 0,-2, 0,2, 1,-1, 1,1, 2,0);
        break;
    default:
        break;
    }
    if (a.isEmpty())
        return;

    if (down) {
        x++;
        y++;
    }

    QPen savePen = p->pen();                        // save current pen
    if (down)
        p->setBrushOrigin(p->brushOrigin() + QPoint(1,1));
    p->fillRect(x, y, w, h, pal.brush(QPalette::Button));
    if (down)
        p->setBrushOrigin(p->brushOrigin() - QPoint(1,1));
    if (enabled) {
        a.translate(x+w/2, y+h/2);
        p->setPen(pal.foreground().color());
        p->drawLine(a.at(0), a.at(1));
        p->drawLine(a.at(2), a.at(2));
        p->drawPoint(a[6]);
    } else {
        a.translate(x+w/2+1, y+h/2+1);
        p->setPen(pal.light().color());
        p->drawLine(a.at(0), a.at(1));
        p->drawLine(a.at(2), a.at(2));
        p->drawPoint(a[6]);
        a.translate(-1, -1);
        p->setPen(pal.mid().color());
        p->drawLine(a.at(0), a.at(1));
        p->drawLine(a.at(2), a.at(2));
        p->drawPoint(a[6]);
    }
    p->setPen(savePen);                        // restore pen
}
#endif // QT3_SUPPORT

#if defined(Q_CC_MSVC)
#pragma warning(disable: 4244)
#endif

#ifdef QT3_SUPPORT
#ifndef QT_NO_STYLE_MOTIF
// motif arrows look the same whether they are used or not
// is this correct?
static void qDrawMotifArrow(QPainter *p, Qt::ArrowType type, bool down,
                             int x, int y, int w, int h,
                             const QPalette &pal, bool)
{
    QPolygon bFill;                                // fill polygon
    QPolygon bTop;                                // top shadow.
    QPolygon bBot;                                // bottom shadow.
    QPolygon bLeft;                                // left shadow.
    QTransform matrix;                            // xform matrix
    bool vertical = type == Qt::UpArrow || type == Qt::DownArrow;
    bool horizontal = !vertical;
    int         dim = w < h ? w : h;
    int         colspec = 0x0000;                        // color specification array

    if (dim < 2)                                // too small arrow
        return;

    if (dim > 3) {
        if (dim > 6)
            bFill.resize(dim & 1 ? 3 : 4);
        bTop.resize((dim/2)*2);
        bBot.resize(dim & 1 ? dim + 1 : dim);
        bLeft.resize(dim > 4 ? 4 : 2);
        bLeft.putPoints(0, 2, 0,0, 0,dim-1);
        if (dim > 4)
            bLeft.putPoints(2, 2, 1,2, 1,dim-3);
        bTop.putPoints(0, 4, 1,0, 1,1, 2,1, 3,1);
        bBot.putPoints(0, 4, 1,dim-1, 1,dim-2, 2,dim-2, 3,dim-2);

        for(int i=0; i<dim/2-2 ; i++) {
            bTop.putPoints(i*2+4, 2, 2+i*2,2+i, 5+i*2, 2+i);
            bBot.putPoints(i*2+4, 2, 2+i*2,dim-3-i, 5+i*2,dim-3-i);
        }
        if (dim & 1)                                // odd number size: extra line
            bBot.putPoints(dim-1, 2, dim-3,dim/2, dim-1,dim/2);
        if (dim > 6) {                        // dim>6: must fill interior
            bFill.putPoints(0, 2, 1,dim-3, 1,2);
            if (dim & 1)                        // if size is an odd number
                bFill.setPoint(2, dim - 3, dim / 2);
            else
                bFill.putPoints(2, 2, dim-4,dim/2-1, dim-4,dim/2);
        }
    }
    else {
        if (dim == 3) {                        // 3x3 arrow pattern
            bLeft.setPoints(4, 0,0, 0,2, 1,1, 1,1);
            bTop .setPoints(2, 1,0, 1,0);
            bBot .setPoints(2, 1,2, 2,1);
        }
        else {                                        // 2x2 arrow pattern
            bLeft.setPoints(2, 0,0, 0,1);
            bTop .setPoints(2, 1,0, 1,0);
            bBot .setPoints(2, 1,1, 1,1);
        }
    }

    if (type == Qt::UpArrow || type == Qt::LeftArrow) {
        matrix.translate(x, y);
        if (vertical) {
            matrix.translate(0, h - 1);
            matrix.rotate(-90);
        } else {
            matrix.translate(w - 1, h - 1);
            matrix.rotate(180);
        }
        if (down)
            colspec = horizontal ? 0x2334 : 0x2343;
        else
            colspec = horizontal ? 0x1443 : 0x1434;
    }
    else if (type == Qt::DownArrow || type == Qt::RightArrow) {
        matrix.translate(x, y);
        if (vertical) {
            matrix.translate(w-1, 0);
            matrix.rotate(90);
        }
        if (down)
            colspec = horizontal ? 0x2443 : 0x2434;
        else
            colspec = horizontal ? 0x1334 : 0x1343;
    }

    const QColor *cols[5];
    cols[0] = 0;
    cols[1] = &pal.button().color();
    cols[2] = &pal.mid().color();
    cols[3] = &pal.light().color();
    cols[4] = &pal.dark().color();
#define CMID        *cols[(colspec>>12) & 0xf]
#define CLEFT        *cols[(colspec>>8) & 0xf]
#define CTOP        *cols[(colspec>>4) & 0xf]
#define CBOT        *cols[colspec & 0xf]

    QPen     savePen   = p->pen();                // save current pen
    QBrush   saveBrush = p->brush();                // save current brush
    QTransform wxm = p->transform();
    QPen     pen(Qt::NoPen);
    const QBrush &brush = pal.brush(QPalette::Button);

    p->setPen(pen);
    p->setBrush(brush);
    p->setTransform(matrix, true);                // set transformation matrix
    p->drawPolygon(bFill);                        // fill arrow
    p->setBrush(Qt::NoBrush);                        // don't fill

    p->setPen(CLEFT);
    p->drawLines(bLeft);
    p->setPen(CTOP);
    p->drawLines(bTop);
    p->setPen(CBOT);
    p->drawLines(bBot);

    p->setTransform(wxm);
    p->setBrush(saveBrush);                        // restore brush
    p->setPen(savePen);                        // restore pen

#undef CMID
#undef CLEFT
#undef CTOP
#undef CBOT
}
#endif // QT_NO_STYLE_MOTIF

QRect qItemRect(QPainter *p, Qt::GUIStyle gs,
                int x, int y, int w, int h,
                int flags,
                bool enabled,
                const QPixmap *pixmap,
                const QString& text, int len)
{
    QRect result;

    if (pixmap) {
        if ((flags & Qt::AlignVCenter) == Qt::AlignVCenter)
            y += h/2 - pixmap->height()/2;
        else if ((flags & Qt::AlignBottom) == Qt::AlignBottom)
            y += h - pixmap->height();
        if ((flags & Qt::AlignRight) == Qt::AlignRight)
            x += w - pixmap->width();
        else if ((flags & Qt::AlignHCenter) == Qt::AlignHCenter)
            x += w/2 - pixmap->width()/2;
        else if ((flags & Qt::AlignLeft) != Qt::AlignLeft && QApplication::isRightToLeft())
            x += w - pixmap->width();
        result = QRect(x, y, pixmap->width(), pixmap->height());
    } else if (!text.isNull() && p) {
        result = p->boundingRect(QRect(x, y, w, h), flags, text.left(len));
        if (gs == Qt::WindowsStyle && !enabled) {
            result.setWidth(result.width()+1);
            result.setHeight(result.height()+1);
        }
    } else {
        result = QRect(x, y, w, h);
    }

    return result;
}

void qDrawArrow(QPainter *p, Qt::ArrowType type, Qt::GUIStyle style, bool down,
                 int x, int y, int w, int h,
                 const QPalette &pal, bool enabled)
{
    switch (style) {
        case Qt::WindowsStyle:
            qDrawWinArrow(p, type, down, x, y, w, h, pal, enabled);
            break;
#ifndef QT_NO_STYLE_MOTIF
        case Qt::MotifStyle:
            qDrawMotifArrow(p, type, down, x, y, w, h, pal, enabled);
            break;
#endif
        default:
            qWarning("qDrawArrow: Requested unsupported GUI style");
    }
}

void qDrawItem(QPainter *p, Qt::GUIStyle gs,
                int x, int y, int w, int h,
                int flags,
                const QPalette &pal, bool enabled,
                const QPixmap *pixmap,
                const QString& text, int len , const QColor* penColor)
{
    p->setPen(penColor?*penColor:pal.foreground().color());
    if (pixmap) {
        QPixmap  pm(*pixmap);
        bool clip = (flags & Qt::TextDontClip) == 0;
        if (clip) {
            if (pm.width() < w && pm.height() < h)
                clip = false;
            else
                p->setClipRect(x, y, w, h);
        }
        if ((flags & Qt::AlignVCenter) == Qt::AlignVCenter)
            y += h/2 - pm.height()/2;
        else if ((flags & Qt::AlignBottom) == Qt::AlignBottom)
            y += h - pm.height();
        if ((flags & Qt::AlignRight) == Qt::AlignRight)
            x += w - pm.width();
        else if ((flags & Qt::AlignHCenter) == Qt::AlignHCenter)
            x += w/2 - pm.width()/2;
        else if (((flags & Qt::AlignLeft) != Qt::AlignLeft) && QApplication::isRightToLeft()) // Qt::AlignAuto && rightToLeft
            x += w - pm.width();

        if (!enabled) {
            if (pm.hasAlphaChannel()) {                        // pixmap with a mask
                pm = pm.mask();
            } else if (pm.depth() == 1) {        // monochrome pixmap, no mask
                ;
#ifndef QT_NO_IMAGE_HEURISTIC_MASK
            } else {                                // color pixmap, no mask
                QString k = QString::fromLatin1("$qt-drawitem-%1").arg(pm.cacheKey());
                if (!QPixmapCache::find(k, pm)) {
                    pm = pm.createHeuristicMask();
                    pm.setMask((QBitmap&)pm);
                    QPixmapCache::insert(k, pm);
                }
#endif
            }
            if (gs == Qt::WindowsStyle) {
                p->setPen(pal.light().color());
                p->drawPixmap(x+1, y+1, pm);
                p->setPen(pal.text().color());
            }
        }
        p->drawPixmap(x, y, pm);
        if (clip)
            p->setClipping(false);
    } else if (!text.isNull()) {
        if (gs == Qt::WindowsStyle && !enabled) {
            p->setPen(pal.light().color());
            p->drawText(x+1, y+1, w, h, flags, text.left(len));
            p->setPen(pal.text().color());
        }
        p->drawText(x, y, w, h, flags, text.left(len));
    }
}

#endif

/*!
    \class QMargins
    \since 4.6

    Holds the borders used to split a pixmap into nine segments in order to
    draw it, similar to \l{http://www.w3.org/TR/css3-background/}
    {CSS3 border-images}.

    \sa Qt::TileRule, QTileRules
*/

/*! \fn QMargins::QMargins(int margin)
  Constructs a QMargins with the top, left, bottom, and
  right margins set to \a margin.
*/

/*! \fn QMargins::QMargins(int topMargin, int leftMargin, int bottomMargin, int rightMargin)
  Constructs a QMargins with the given \a topMargin, \a leftMargin,
  \a bottomMargin, and \a rightMargin.
 */

/*!
    \class QTileRules
    \since 4.6

    Holds the rules used to draw a pixmap or image split into nine segments,
    similar to \l{http://www.w3.org/TR/css3-background/}{CSS3 border-images}.

    \sa Qt::TileRule, QMargins
*/

/*! \fn QTileRules::QTileRules(Qt::TileRule horizontalRule, Qt::TileRule verticalRule)
  Constructs a QTileRules with the given \a horizontalRule and
  \a verticalRule.
 */

/*! \fn QTileRules::QTileRules(Qt::TileRule rule)
  Constructs a QTileRules with the given \a rule used for both
  the horizontal rule and the vertical rule.
 */

/*!
    \fn void qDrawBorderPixmap(QPainter *painter, const QRect &target, const QMargins &margins, const QPixmap &pixmap)
    \since 4.6
    \relates QMargins

    Draws the given \a pixmap into the given \a target rectangle, using the
    given \a painter. The pixmap will be split into nine segments and drawn
    according to the \a margins structure.
*/

static inline void qVerticalRepeat(QPainter *painter,
                                   const QRect &target,
                                   const QPixmap &pixmap,
                                   const QRect &source,
                                   void (*drawPixmap)(QPainter*,
                                                      const QRect&,
                                                      const QPixmap&,
                                                      const QRect&))
{
    const int x = target.x();
    const int width = target.width();
    const int height = source.height();
    const int bottom = target.bottom() - height;
    int y = target.y();
    for (; y < bottom; y += height)
        (*drawPixmap)(painter, QRect(x, y, width, height), pixmap, source);
    const QRect remaining(source.x(), source.y(), source.width(), target.bottom() - y + 1);
    (*drawPixmap)(painter, QRect(x, y, width, remaining.height()), pixmap, remaining);
}

static inline void qHorizontalRepeat(QPainter *painter, const QRect &target, const QPixmap &pixmap, const QRect &source,
                                     void (*drawPixmap)(QPainter*, const QRect&, const QPixmap&, const QRect&))
{
    const int y = target.y();
    const int width = source.width();
    const int height = target.height();
    const int right = target.right() - width;
    int x = target.x();
    for (; x < right; x += width)
        (*drawPixmap)(painter, QRect(x, y, width, height), pixmap, source);
    const QRect remaining(source.x(), source.y(), target.right() - x + 1, source.height());
    (*drawPixmap)(painter, QRect(x, y, remaining.width(), height), pixmap, remaining);
}

static inline void qVerticalRound(QPainter *painter, const QRect &target, const QPixmap &pixmap, const QRect &source,
                                  void (*drawPixmap)(QPainter*, const QRect&, const QPixmap&, const QRect&))
{
    // qreal based - slow on non-fpu devices
    const qreal x = target.x();
    const qreal width = target.width();
    const qreal verticalFactor = static_cast<qreal>(target.height()) / static_cast<qreal>(source.height());
    const qreal verticalIncrement = static_cast<qreal>(target.height()) / static_cast<int>(verticalFactor + 0.5);
    const qreal bottom = target.bottom();
    for (qreal y = static_cast<qreal>(target.y()); y < bottom; y += verticalIncrement)
         (*drawPixmap)(painter, QRectF(x, y, width, verticalIncrement).toRect(), pixmap, source);

}

static inline void qHorizontalRound(QPainter *painter, const QRect &target, const QPixmap &pixmap, const QRect &source,
                                    void (*drawPixmap)(QPainter*, const QRect&, const QPixmap&, const QRect&))
{
    // qreal based - slow on non-fpu devices
    const qreal y = target.y();
    const qreal height = target.height();
    const qreal horizontalFactor = static_cast<qreal>(target.width()) / static_cast<qreal>(source.width());
    const qreal horizontalIncrement = static_cast<qreal>(target.width()) / static_cast<int>(horizontalFactor + 0.5);
    const qreal right = target.right();
    for (qreal x = target.x(); x < right; x += horizontalIncrement)
        (*drawPixmap)(painter, QRectF(x, y, horizontalIncrement, height).toRect(), pixmap, source);
}

static inline void qDrawPixmap(QPainter *painter, const QRect &target, const QPixmap &pixmap, const QRect &source)
{
    painter->drawPixmap(target, pixmap, source);
}

static inline void qDrawVerticallyRepeatedPixmap(QPainter *painter, const QRect &target, const QPixmap &pixmap, const QRect &source)
{
    qVerticalRepeat(painter, target, pixmap, source, qDrawPixmap);
}

static inline void qDrawHorizontallyRepeatedPixmap(QPainter *painter, const QRect &target, const QPixmap &pixmap, const QRect &source)
{
    qHorizontalRepeat(painter, target, pixmap, source, qDrawPixmap);
}

static inline void qDrawVerticallyRoundedPixmap(QPainter *painter, const QRect &target, const QPixmap &pixmap, const QRect &source)
{
    qVerticalRound(painter, target, pixmap, source, qDrawPixmap);
}

static inline void qDrawHorizontallyRoundedPixmap(QPainter *painter, const QRect &target, const QPixmap &pixmap, const QRect &source)
{
    qHorizontalRound(painter, target, pixmap, source, qDrawPixmap);
}

/*!
    \since 4.6

    Draws the indicated \a sourceRect rectangle from the given \a pixmap into
    the given \a targetRect rectangle, using the given \a painter. The pixmap
    will be split into nine segments according to the given \a targetMargins
    and \a sourceMargins structures. Finally, the pixmap will be drawn
    according to the given \a rules.

    This function is used to draw a scaled pixmap, similar to
    \l{http://www.w3.org/TR/css3-background/}{CSS3 border-images}

    \sa Qt::TileRule, QTileRules, QMargins
*/

void qDrawBorderPixmap(QPainter *painter, const QRect &targetRect, const QMargins &targetMargins, const QPixmap &pixmap,
                       const QRect &sourceRect, const QMargins &sourceMargins, const QTileRules &rules)
{
    // source center
    const int sourceTop = sourceRect.top();
    const int sourceLeft = sourceRect.left();
    const int sourceCenterTop = sourceTop + sourceMargins.top;
    const int sourceCenterLeft = sourceLeft + sourceMargins.left;
    const int sourceCenterBottom = sourceRect.bottom() - sourceMargins.bottom + 1;
    const int sourceCenterRight = sourceRect.right() - sourceMargins.right + 1;
    const int sourceCenterWidth = sourceCenterRight - sourceMargins.left;
    const int sourceCenterHeight = sourceCenterBottom - sourceMargins.top;
    // target center
    const int targetTop = targetRect.top();
    const int targetLeft = targetRect.left();
    const int targetCenterTop = targetTop + targetMargins.top;
    const int targetCenterLeft = targetLeft + targetMargins.left;
    const int targetCenterBottom = targetRect.bottom() - targetMargins.bottom + 1;
    const int targetCenterRight = targetRect.right() - targetMargins.right + 1;
    const int targetCenterWidth = targetCenterRight - targetCenterLeft;
    const int targetCenterHeight = targetCenterBottom - targetCenterTop;

    // corners
    if (targetMargins.top > 0 && targetMargins.left > 0 && sourceMargins.top > 0 && sourceMargins.left > 0) { // top left
        const QRect targetTopLeftRect(targetLeft, targetTop, targetMargins.left, targetMargins.top);
        const QRect sourceTopLeftRect(sourceLeft, sourceTop, sourceMargins.left, sourceMargins.top);
        qDrawPixmap(painter, targetTopLeftRect, pixmap, sourceTopLeftRect);
    }
    if (targetMargins.top > 0 && targetMargins.right > 0 && sourceMargins.top > 0 && sourceMargins.right > 0) { // top right
        const QRect targetTopRightRect(targetCenterRight, targetTop, targetMargins.right, targetMargins.top);
        const QRect sourceTopRightRect(sourceCenterRight, sourceTop, sourceMargins.right, sourceMargins.top);
        qDrawPixmap(painter, targetTopRightRect, pixmap, sourceTopRightRect);
    }
    if (targetMargins.bottom > 0 && targetMargins.left > 0 && sourceMargins.bottom > 0 && sourceMargins.left > 0) { // bottom left
        const QRect targetBottomLeftRect(targetLeft, targetCenterBottom, targetMargins.left, targetMargins.bottom);
        const QRect sourceBottomLeftRect(sourceLeft, sourceCenterBottom, sourceMargins.left, sourceMargins.bottom);
        qDrawPixmap(painter, targetBottomLeftRect, pixmap, sourceBottomLeftRect);
    }
    if (targetMargins.bottom > 0 && targetMargins.right > 0 && sourceMargins.bottom > 0 && sourceMargins.right > 0) { // bottom right
        const QRect targetBottomRightRect(targetCenterRight, targetCenterBottom, targetMargins.right, targetMargins.bottom);
        const QRect sourceBottomRightRect(sourceCenterRight, sourceCenterBottom, sourceMargins.right, sourceMargins.bottom);
        qDrawPixmap(painter, targetBottomRightRect, pixmap, sourceBottomRightRect);
    }

    // horizontal edges
    switch (rules.horizontal) {
        case Qt::Stretch:
        if (targetMargins.top > 0 && sourceMargins.top > 0) { // top
            const QRect targetTopRect(targetCenterLeft, targetTop, targetCenterWidth, targetMargins.top);
            const QRect sourceTopRect(sourceCenterLeft, sourceTop, sourceCenterWidth, sourceMargins.top);
            qDrawPixmap(painter, targetTopRect, pixmap, sourceTopRect);
        }
        if (targetMargins.bottom > 0 && sourceMargins.bottom > 0) { // bottom
            const QRect targetBottomRect(targetCenterLeft, targetCenterBottom, targetCenterWidth, targetMargins.bottom);
            const QRect sourceBottomRect(sourceCenterLeft, sourceCenterBottom, sourceCenterWidth, sourceMargins.bottom);
            qDrawPixmap(painter, targetBottomRect, pixmap, sourceBottomRect);
        }
        break;
        case Qt::Repeat:
        if (targetMargins.top > 0 && sourceMargins.top > 0) { // top
            const QRect targetTopRect(targetCenterLeft, targetTop, targetCenterWidth, targetMargins.top);
            const QRect sourceTopRect(sourceCenterLeft, sourceTop, sourceCenterWidth, sourceMargins.top);
            qDrawHorizontallyRepeatedPixmap(painter, targetTopRect, pixmap, sourceTopRect);
        }
        if (targetMargins.bottom > 0 && sourceMargins.bottom > 0) { // bottom
            const QRect targetBottomRect(targetCenterLeft, targetCenterBottom, targetCenterWidth, targetMargins.bottom);
            const QRect sourceBottomRect(sourceCenterLeft, sourceCenterBottom, sourceCenterWidth, sourceMargins.bottom);
            qDrawHorizontallyRepeatedPixmap(painter, targetBottomRect, pixmap, sourceBottomRect);
        }
        break;
        case Qt::Round:
        if (targetMargins.top > 0 && sourceMargins.top > 0) { // top
            const QRect targetTopRect(targetCenterLeft, targetTop, targetCenterWidth, targetMargins.top);
            const QRect sourceTopRect(sourceCenterLeft, sourceTop, sourceCenterWidth, sourceMargins.top);
            qDrawHorizontallyRoundedPixmap(painter, targetTopRect, pixmap, sourceTopRect);
        }
        if (targetMargins.bottom > 0 && sourceMargins.bottom > 0) { // bottom
            const QRect targetBottomRect(targetCenterLeft, targetCenterBottom, targetCenterWidth, targetMargins.bottom);
            const QRect sourceBottomRect(sourceCenterLeft, sourceCenterBottom, sourceCenterWidth, sourceMargins.bottom);
            qDrawHorizontallyRoundedPixmap(painter, targetBottomRect, pixmap, sourceBottomRect);
        }
        break;
    }

    // vertical edges
    switch (rules.vertical) {
        case Qt::Stretch:
        if (targetMargins.left > 0 && sourceMargins.left > 0) { // left
            const QRect targetLeftRect(targetLeft, targetCenterTop, targetMargins.left, targetCenterHeight);
            const QRect sourceLeftRect(sourceLeft, sourceCenterTop, sourceMargins.left, sourceCenterHeight);
            qDrawPixmap(painter, targetLeftRect, pixmap, sourceLeftRect);
        }
        if (targetMargins.right > 0 && sourceMargins.right > 0) { // right
            const QRect targetRightRect(targetCenterRight, targetCenterTop, targetMargins.right, targetCenterHeight);
            const QRect sourceRightRect(sourceCenterRight, sourceCenterTop, sourceMargins.right, sourceCenterHeight);
            qDrawPixmap(painter, targetRightRect, pixmap, sourceRightRect);
        }
        break;
        case Qt::Repeat:
        if (targetMargins.left > 0 && sourceMargins.left > 0) { // left
            const QRect targetLeftRect(targetLeft, targetCenterTop, targetMargins.left, targetCenterHeight);
            const QRect sourceLeftRect(sourceLeft, sourceCenterTop, sourceMargins.left, sourceCenterHeight);
            qDrawVerticallyRepeatedPixmap(painter, targetLeftRect, pixmap, sourceLeftRect);
        }
        if (targetMargins.right > 0 && sourceMargins.right > 0) { // right
            const QRect targetRightRect(targetCenterRight, targetCenterTop, targetMargins.right, targetCenterHeight);
            const QRect sourceRightRect(sourceCenterRight, sourceCenterTop, sourceMargins.right, sourceCenterHeight);
            qDrawVerticallyRepeatedPixmap(painter, targetRightRect, pixmap, sourceRightRect);
        }
        break;
        case Qt::Round:
        if (targetMargins.left > 0 && sourceMargins.left > 0) { // left
            const QRect targetLeftRect(targetLeft, targetCenterTop, targetMargins.left, targetCenterHeight);
            const QRect sourceLeftRect(sourceLeft, sourceCenterTop, sourceMargins.left, sourceCenterHeight);
            qDrawVerticallyRoundedPixmap(painter, targetLeftRect, pixmap, sourceLeftRect);
        }
        if (targetMargins.right > 0 && sourceMargins.right > 0) { // right
            const QRect targetRightRect(targetCenterRight, targetCenterTop, targetMargins.right, targetCenterHeight);
            const QRect sourceRightRect(sourceCenterRight, sourceCenterTop, sourceMargins.right, sourceCenterHeight);
            qDrawVerticallyRoundedPixmap(painter, targetRightRect, pixmap, sourceRightRect);
        }
        break;
    }

    // center
    if (targetCenterWidth > 0 && targetCenterHeight > 0 && sourceCenterWidth > 0 && sourceCenterHeight > 0) {
        const QRect targetCenterRect(targetCenterLeft, targetCenterTop, targetCenterWidth, targetCenterHeight);
        const QRect sourceCenterRect(sourceCenterLeft, sourceCenterTop, sourceCenterWidth, sourceCenterHeight);
        switch (rules.horizontal) {
        case Qt::Stretch:
            switch (rules.vertical) {
                case Qt::Stretch: // stretch stretch
                    qDrawPixmap(painter, targetCenterRect, pixmap, sourceCenterRect);
                break;
                case Qt::Repeat: // stretch repeat
                    qVerticalRepeat(painter, targetCenterRect, pixmap, sourceCenterRect, qDrawPixmap);
                break;
                case Qt::Round: // stretch round
                    qVerticalRound(painter, targetCenterRect, pixmap, sourceCenterRect, qDrawPixmap);
                break;
            }
            break;
        case Qt::Repeat:
            switch (rules.vertical) {
                case Qt::Stretch: // repeat stretch
                    qHorizontalRepeat(painter, targetCenterRect, pixmap, sourceCenterRect, qDrawPixmap);
                break;
                case Qt::Repeat: // repeat repeat
                    qVerticalRepeat(painter, targetCenterRect, pixmap, sourceCenterRect, qDrawHorizontallyRepeatedPixmap);
                break;
                case Qt::Round: // repeat round
                    qVerticalRound(painter, targetCenterRect, pixmap, sourceCenterRect, qDrawHorizontallyRepeatedPixmap);
                break;
            }
            break;
        case Qt::Round:
            switch (rules.vertical) {
                case Qt::Stretch: // round stretch
                    qHorizontalRound(painter, targetCenterRect, pixmap, sourceCenterRect, qDrawPixmap);
                break;
                case Qt::Repeat: // round repeat
                    qHorizontalRound(painter, targetCenterRect, pixmap, sourceCenterRect, qDrawVerticallyRepeatedPixmap);
                break;
                case Qt::Round: // round round
                    qHorizontalRound(painter, targetCenterRect, pixmap, sourceCenterRect, qDrawVerticallyRoundedPixmap);
                break;
            }
            break;
        }
    }
}

QT_END_NAMESPACE