C++ QwtMetricsMap类代码示例

/*!
   Find the height for a given width

   \param defaultFont Font, used for the calculation if the text has no font
   \param width Width

   \return Calculated height
*/
int QwtText::heightForWidth(int width, const QFont &defaultFont) const
{
    const QwtMetricsMap map = QwtPainter::metricsMap();
    width = map.layoutToScreenX(width);

#if QT_VERSION < 0x040000
    const QFont font = usedFont(defaultFont);
#else
    // We want to calculate in screen metrics. So
    // we need a font that uses screen metrics

    const QFont font(usedFont(defaultFont), QApplication::desktop());
#endif

    int h = 0;

    if ( d_data->layoutAttributes & MinimumLayout ) {
        int left, right, top, bottom;
        d_data->textEngine->textMargins(font, d_data->text,
                                        left, right, top, bottom);

        h = d_data->textEngine->heightForWidth(
                font, d_data->renderFlags, d_data->text,
                width + left + right);

        h -= top + bottom;
    } else {
        h = d_data->textEngine->heightForWidth(
                font, d_data->renderFlags, d_data->text, width);
    }

    h = map.screenToLayoutY(h);
    return h;
}

QSize QwtText::textSize(const QFont &font) const
{
#if QT_VERSION < 0x040000
    const QFont fnt(usedFont(font));
#else
    // We want to calculate in screen metrics. So
    // we need a font that uses screen metrics

    const QFont fnt(usedFont(font), QApplication::desktop());
#endif

    if ( !d_layoutCache->textSize.isValid() 
        || d_layoutCache->font != fnt )
    {
        d_layoutCache->textSize = d_data->textEngine->textSize(
            fnt, d_data->flags, d_data->text);
        d_layoutCache->font = fnt;
    }

    QSize sz = d_layoutCache->textSize;

    if ( d_data->layoutAttributes & MinimumLayout )
    {
        int left, right, top, bottom;
        d_data->textEngine->textMargins(fnt, d_data->text,
            left, right, top, bottom);
        sz -= QSize(left + right, top + bottom);
    }

    const QwtMetricsMap map = QwtPainter::metricsMap();
    sz = map.screenToLayout(sz);
    return sz;
}

void QwtScaleWidget::drawTitle(QPainter *painter,
    QwtScaleDraw::Alignment align, const QRect &rect) const
{
    QRect r;
    double angle;
    int flags = d_data->title.renderFlags() & 
        ~(Qt::AlignTop | Qt::AlignBottom | Qt::AlignVCenter);

    switch(align)
    {
        case QwtScaleDraw::LeftScale:
            flags |= Qt::AlignTop;
            angle = -90.0;
            r.setRect(rect.left(), rect.bottom(), rect.height(), rect.width());
            break;
        case QwtScaleDraw::RightScale:
            flags |= Qt::AlignTop;
            angle = 90.0;
            r.setRect(rect.right(), rect.top(), rect.height(), rect.width());
            break;
        case QwtScaleDraw::TopScale:
            flags |= Qt::AlignTop;
            angle = 0.0;
            r = rect;
            break;
        case QwtScaleDraw::BottomScale:
        default:
            flags |= Qt::AlignBottom;
            angle = 0.0;
            r = rect;
            break;
    }

    painter->save();
    painter->setFont(font());
#if QT_VERSION < 0x040000
    painter->setPen(colorGroup().color(QColorGroup::Text));
#else
    painter->setPen(palette().color(QPalette::Text));
#endif

    const QwtMetricsMap metricsMap = QwtPainter::metricsMap();
    QwtPainter::resetMetricsMap();

    r = metricsMap.layoutToDevice(r);

    painter->translate(r.x(), r.y());
    if (angle != 0.0)
        painter->rotate(angle);

    QwtText title = d_data->title;
    title.setRenderFlags(flags);
    title.draw(painter, QRect(0, 0, r.width(), r.height()));

    QwtPainter::setMetricsMap(metricsMap); // restore metrics map

    painter->restore();
}

/*!
   Returns the size, that is needed to render text

   \param defaultFont Font of the text
   \return Caluclated size
*/
QSize QwtText::textSize(const QFont &defaultFont) const
{
#if QT_VERSION < 0x040000
    const QFont font(usedFont(defaultFont));
#else
    // We want to calculate in screen metrics. So
    // we need a font that uses screen metrics

    const QFont font(usedFont(defaultFont), QApplication::desktop());
#endif

    if ( !d_layoutCache->textSize.isValid() 
        || d_layoutCache->font != font )
    {
        d_layoutCache->textSize = d_data->textEngine->textSize(
            font, d_data->renderFlags, d_data->text);
        d_layoutCache->font = font;
    }

    QSize sz = d_layoutCache->textSize;

    const QwtMetricsMap map = QwtPainter::metricsMap();

    if ( d_data->layoutAttributes & MinimumLayout )
    {
        int left, right, top, bottom;
        d_data->textEngine->textMargins(font, d_data->text,
            left, right, top, bottom);
        sz -= QSize(left + right, top + bottom);

#if QT_VERSION >= 0x040000
        if ( !map.isIdentity() )
        {
#ifdef __GNUC__
#warning Too small text size, when printing in high resolution
#endif
            /*
                When printing in high resolution, the tick labels
                of are cut of. We need to find out why, but for
                the moment we add a couple of pixels instead.
             */
            sz += QSize(3, 2);
        }
#endif
    }

    sz = map.screenToLayout(sz);
    return sz;
}

void ScaleDraw::drawBreak(QPainter *painter) const {
  ScaleEngine *sc_engine =
      static_cast<ScaleEngine *>(d_plot->axisScaleEngine(axis()));
  /*const QwtScaleEngine * qwtsc_engine=d_plot->axisScaleEngine(axis());
  const ScaleEngine *sc_engine =dynamic_cast<const ScaleEngine*>(qwtsc_engine);
  if(sc_engine!=NULL)
  {*/
  if (!sc_engine->hasBreak() || !sc_engine->hasBreakDecoration())
    return;

  painter->save();
  painter->setRenderHint(QPainter::Antialiasing);

  int len = majTickLength();

  QwtScaleMap scaleMap = map();
  const QwtMetricsMap metricsMap = QwtPainter::metricsMap();
  QPoint pos = this->pos();

  if (!metricsMap.isIdentity()) {
    QwtPainter::resetMetricsMap();
    pos = metricsMap.layoutToDevice(pos);

    if (orientation() == Qt::Vertical) {
      scaleMap.setPaintInterval(metricsMap.layoutToDeviceY((int)scaleMap.p1()),
                                metricsMap.layoutToDeviceY((int)scaleMap.p2()));
      len = metricsMap.layoutToDeviceX(len);
    } else {
      scaleMap.setPaintInterval(metricsMap.layoutToDeviceX((int)scaleMap.p1()),
                                metricsMap.layoutToDeviceX((int)scaleMap.p2()));
      len = metricsMap.layoutToDeviceY(len);
    }
  }

  int lval = scaleMap.transform(sc_engine->axisBreakLeft());
  int rval = scaleMap.transform(sc_engine->axisBreakRight());
  switch (alignment()) {
  case LeftScale:
    QwtPainter::drawLine(painter, pos.x(), lval, pos.x() - len, lval + len);
    QwtPainter::drawLine(painter, pos.x(), rval, pos.x() - len, rval + len);
    break;
  case RightScale:
    QwtPainter::drawLine(painter, pos.x(), lval, pos.x() + len, lval - len);
    QwtPainter::drawLine(painter, pos.x(), rval, pos.x() + len, rval - len);
    break;
  case BottomScale:
    QwtPainter::drawLine(painter, lval, pos.y(), lval - len, pos.y() + len);
    QwtPainter::drawLine(painter, rval, pos.y(), rval - len, pos.y() + len);
    break;
  case TopScale:
    QwtPainter::drawLine(painter, lval, pos.y(), lval + len, pos.y() - len);
    QwtPainter::drawLine(painter, rval, pos.y(), rval + len, pos.y() - len);
    break;
  }

  QwtPainter::setMetricsMap(metricsMap); // restore metrics map
  painter->restore();
  //}
}

void ScaleDraw::drawBreak(QPainter *painter) const
{
	ScaleEngine *sc_engine = (ScaleEngine *)d_plot->axisScaleEngine(axis());
    if (!sc_engine->hasBreak() || !sc_engine->hasBreakDecoration())
        return;

    painter->save();
    painter->setRenderHint(QPainter::Antialiasing);

	QPen pen = painter->pen();
	pen.setColor(d_plot->axisWidget(axis())->palette().color(QPalette::Active, QColorGroup::Foreground));
	painter->setPen(pen);

	int len = d_plot->majorTickLength();

    QwtScaleMap scaleMap = map();
    const QwtMetricsMap metricsMap = QwtPainter::metricsMap();
    QPoint pos = this->pos();

	if (!d_plot->isPrinting()){
		QwtPainter::resetMetricsMap();
		pos = metricsMap.layoutToDevice(pos);

		if ( orientation() == Qt::Vertical ){
			scaleMap.setPaintInterval(
				metricsMap.layoutToDeviceY((int)scaleMap.p1()),
				metricsMap.layoutToDeviceY((int)scaleMap.p2()));
			len = metricsMap.layoutToDeviceX(len);
		} else {
			scaleMap.setPaintInterval(
				metricsMap.layoutToDeviceX((int)scaleMap.p1()),
				metricsMap.layoutToDeviceX((int)scaleMap.p2()));
			len = metricsMap.layoutToDeviceY(len);
		}
	}

	int lval = scaleMap.transform(sc_engine->axisBreakLeft());
	int rval = scaleMap.transform(sc_engine->axisBreakRight());
	switch(alignment()){
		case LeftScale:
		case RightScale:
			QwtPainter::drawLine(painter, pos.x() + len, lval - len, pos.x() - len, lval + len);
			QwtPainter::drawLine(painter, pos.x() + len, rval - len, pos.x() - len, rval + len);
		break;
		case TopScale:
		case BottomScale:
			QwtPainter::drawLine(painter, lval + len, pos.y() - len, lval - len, pos.y() + len);
			QwtPainter::drawLine(painter, rval + len, pos.y() - len, rval - len, pos.y() + len);
		break;
	}

	if (!d_plot->isPrinting())
		QwtPainter::setMetricsMap(metricsMap); // restore metrics map
	painter->restore();
}

void QwtPlot::printLegend(QPainter *painter, const QRect &rect) const
{
    if ( !legend() || legend()->isEmpty() )
        return;

    QLayout *l = legend()->contentsWidget()->layout();
    if ( l == 0 || !l->inherits("QwtDynGridLayout") )
        return;

    QwtDynGridLayout *legendLayout = (QwtDynGridLayout *)l;

    uint numCols = legendLayout->columnsForWidth(rect.width());
#if QT_VERSION < 0x040000
    QValueList<QRect> itemRects =
        legendLayout->layoutItems(rect, numCols);
#else
    QList<QRect> itemRects =
        legendLayout->layoutItems(rect, numCols);
#endif

    int index = 0;

#if QT_VERSION < 0x040000
    QLayoutIterator layoutIterator = legendLayout->iterator();
    for ( QLayoutItem *item = layoutIterator.current();
            item != 0; item = ++layoutIterator) {
#else
    for ( int i = 0; i < legendLayout->count(); i++ ) {
        QLayoutItem *item = legendLayout->itemAt(i);
#endif
        QWidget *w = item->widget();
        if ( w ) {
            painter->save();
            painter->setClipping(true);
            QwtPainter::setClipRect(painter, itemRects[index]);

            printLegendItem(painter, w, itemRects[index]);

            index++;
            painter->restore();
        }
    }
}

/*!
  Print the legend item into a given rectangle.

  \param painter Painter
  \param w Widget representing a legend item
  \param rect Bounding rectangle
*/

void QwtPlot::printLegendItem(QPainter *painter,
                              const QWidget *w, const QRect &rect) const
{
    if ( w->inherits("QwtLegendItem") ) {
        QwtLegendItem *item = (QwtLegendItem *)w;

        painter->setFont(item->font());
        item->drawItem(painter, rect);
    }
}

/*!
  \brief Paint a scale into a given rectangle.
  Paint the scale into a given rectangle.

  \param painter Painter
  \param axisId Axis
  \param startDist Start border distance
  \param endDist End border distance
  \param baseDist Base distance
  \param rect Bounding rectangle
*/

void QwtPlot::printScale(QPainter *painter,
                         int axisId, int startDist, int endDist, int baseDist,
                         const QRect &rect) const
{
    if (!axisEnabled(axisId))
        return;

    const QwtScaleWidget *scaleWidget = axisWidget(axisId);
    if ( scaleWidget->isColorBarEnabled()
            && scaleWidget->colorBarWidth() > 0) {
        const QwtMetricsMap map = QwtPainter::metricsMap();

        QRect r = map.layoutToScreen(rect);
        r.setWidth(r.width() - 1);
        r.setHeight(r.height() - 1);

        scaleWidget->drawColorBar(painter, scaleWidget->colorBarRect(r));

        const int off = scaleWidget->colorBarWidth() + scaleWidget->spacing();
        if ( scaleWidget->scaleDraw()->orientation() == Qt::Horizontal )
            baseDist += map.screenToLayoutY(off);
        else
            baseDist += map.screenToLayoutX(off);
    }

//.........这里部分代码省略.........

/*!
   Draw a tick

   \param painter Painter
   \param value Value of the tick
   \param len Lenght of the tick

   \sa drawBackbone(), drawLabel()
*/
void QwtScaleDraw::drawTick(QPainter *painter, double value, int len) const
{
    if ( len <= 0 )
        return;

    int pw2 = qwtMin((int)painter->pen().width(), len) / 2;
    
    QwtScaleMap scaleMap = map();
    const QwtMetricsMap metricsMap = QwtPainter::metricsMap();
    QPoint pos = d_data->pos;

    if ( !metricsMap.isIdentity() )
    {
        /*
           The perfect position of the ticks is important.
           To avoid rounding errors we have to use 
           device coordinates.
         */
        QwtPainter::resetMetricsMap();

        pos = metricsMap.layoutToDevice(pos);
    
        if ( orientation() == Qt::Vertical )
        {
            scaleMap.setPaintInterval(
                metricsMap.layoutToDeviceY((int)scaleMap.p1()),
                metricsMap.layoutToDeviceY((int)scaleMap.p2())
            );
            len = metricsMap.layoutToDeviceX(len);
        }
        else
        {
            scaleMap.setPaintInterval(
                metricsMap.layoutToDeviceX((int)scaleMap.p1()),
                metricsMap.layoutToDeviceX((int)scaleMap.p2())
            );
            len = metricsMap.layoutToDeviceY(len);
        }
    }

    const int tval = scaleMap.transform(value);

    switch(alignment())
    {
        case LeftScale:
        {
#if QT_VERSION < 0x040000
            QwtPainter::drawLine(painter, pos.x() + pw2, tval,
                pos.x() - len - 2 * pw2, tval);
#else
            QwtPainter::drawLine(painter, pos.x() - pw2, tval,
                pos.x() - len, tval);
#endif
            break;
        }

        case RightScale:
        {
#if QT_VERSION < 0x040000
            QwtPainter::drawLine(painter, pos.x(), tval,
                pos.x() + len + pw2, tval);
#else
            QwtPainter::drawLine(painter, pos.x() + pw2, tval,
                pos.x() + len, tval);
#endif
            break;
        }
    
        case BottomScale:
        {
#if QT_VERSION < 0x040000
            QwtPainter::drawLine(painter, tval, pos.y(),
                tval, pos.y() + len + 2 * pw2);
#else
            QwtPainter::drawLine(painter, tval, pos.y() + pw2,
                tval, pos.y() + len);
#endif
            break;
        }

        case TopScale:
        {
#if QT_VERSION < 0x040000
            QwtPainter::drawLine(painter, tval, pos.y() + pw2,
                tval, pos.y() - len - 2 * pw2);
#else
            QwtPainter::drawLine(painter, tval, pos.y() - pw2,
                tval, pos.y() - len);
#endif
            break;
        }
//.........这里部分代码省略.........

void Plot::printScale(QPainter *painter, int axisId, int startDist, int endDist, 
					  int baseDist, const QRect &rect) const
{
    if (!axisEnabled(axisId))
        return;

    const QwtScaleWidget *scaleWidget = axisWidget(axisId);
    if ( scaleWidget->isColorBarEnabled() 
        && scaleWidget->colorBarWidth() > 0)
    {
        const QwtMetricsMap map = QwtPainter::metricsMap();

        const QRect r = map.layoutToScreen(rect);
        scaleWidget->drawColorBar(painter, scaleWidget->colorBarRect(r));

        const int off = scaleWidget->colorBarWidth() + scaleWidget->spacing();
        if ( scaleWidget->scaleDraw()->orientation() == Qt::Horizontal )
            baseDist += map.screenToLayoutY(off);
        else
            baseDist += map.screenToLayoutX(off);
    }

    QwtScaleDraw::Alignment align;
    int x, y, w;

	const int bw2 = scaleWidget->penWidth() / 2;

    switch(axisId)
    {
        case yLeft:
        {
            x = rect.right() - baseDist + 1 - bw2;
            y = rect.y() + startDist;
            w = rect.height() - startDist - endDist;
            align = QwtScaleDraw::LeftScale;
            break;
        }
        case yRight:
        {
            x = rect.left() + baseDist;
			if (scaleWidget->penWidth() % 2 == 0)
				x += 1;

            y = rect.y() + startDist;
            w = rect.height() - startDist - endDist + bw2;
            align = QwtScaleDraw::RightScale;
            break;
        }
        case xTop:
        {
            x = rect.left() + startDist;
            y = rect.bottom() - baseDist + 1;
			if (scaleWidget->penWidth() % 2 == 0)
				y -= bw2;
            w = rect.width() - startDist - endDist;
            align = QwtScaleDraw::TopScale;
            break;
        }
        case xBottom:
        {
            x = rect.left() + startDist;
            y = rect.top() + baseDist;

			if (scaleWidget->penWidth() % 2 == 1)
				y += bw2;

            w = rect.width() - startDist - endDist + bw2;
            align = QwtScaleDraw::BottomScale;
            break;
        }
        default:
            return;
    }

    scaleWidget->drawTitle(painter, align, rect);

    painter->save();
    painter->setFont(scaleWidget->font());

    QPen pen = painter->pen();
    pen.setWidth(scaleWidget->penWidth());
    painter->setPen(pen);

    QwtScaleDraw *sd = (QwtScaleDraw *)scaleWidget->scaleDraw();
    const QPoint sdPos = sd->pos();
    const int sdLength = sd->length();

    sd->move(x, y);
    sd->setLength(w);

#if QT_VERSION < 0x040000
    sd->draw(painter, scaleWidget->palette().active());
#else
    QPalette palette = scaleWidget->palette();
    palette.setCurrentColorGroup(QPalette::Active);
    sd->draw(painter, palette);
#endif
    // reset previous values
    sd->move(sdPos); 
    sd->setLength(sdLength); 
//.........这里部分代码省略.........

/*!
   Draw a text into a rectangle

   \param painter Painter
   \param rect Rectangle
*/
void QwtText::draw(QPainter *painter, const QRect &rect) const
{
    if ( d_data->paintAttributes & PaintBackground )
    {
        if ( d_data->backgroundPen != Qt::NoPen || 
            d_data->backgroundBrush != Qt::NoBrush )
        {
            painter->save();
            painter->setPen(QwtPainter::scaledPen(d_data->backgroundPen));
            painter->setBrush(d_data->backgroundBrush);
#if QT_VERSION < 0x040000
            QwtPainter::drawRect(painter, rect);
#else
            const QRect r(rect.x(), rect.y(), 
                rect.width() - 1, rect.height() - 1);
            QwtPainter::drawRect(painter, r);
#endif
            painter->restore();
        }
    }

    painter->save();

    if ( d_data->paintAttributes & PaintUsingTextFont )
    {
        painter->setFont(d_data->font);
    }

    if ( d_data->paintAttributes & PaintUsingTextColor )
    {
        if ( d_data->color.isValid() )
            painter->setPen(d_data->color);
    }

    QRect expandedRect = rect;
    if ( d_data->layoutAttributes & MinimumLayout )
    {
#if QT_VERSION < 0x040000
        const QFont font(painter->font());
#else
        // We want to calculate in screen metrics. So
        // we need a font that uses screen metrics

        const QFont font(painter->font(), QApplication::desktop());
#endif

        int left, right, top, bottom;
        d_data->textEngine->textMargins(
            font, d_data->text,
            left, right, top, bottom);

        const QwtMetricsMap map = QwtPainter::metricsMap();
        left = map.screenToLayoutX(left);
        right = map.screenToLayoutX(right);
        top = map.screenToLayoutY(top);
        bottom = map.screenToLayoutY(bottom);

        expandedRect.setTop(rect.top() - top);
        expandedRect.setBottom(rect.bottom() + bottom);
        expandedRect.setLeft(rect.left() - left);
        expandedRect.setRight(rect.right() + right);
    }

    d_data->textEngine->draw(painter, expandedRect, 
        d_data->renderFlags, d_data->text);

    painter->restore();
}

void ScaleDraw::drawInwardTick(QPainter *painter, double value, int len) const
{
	ScaleEngine *sc_engine = (ScaleEngine *)d_plot->axisScaleEngine(axis());
	if (sc_engine->hasBreak() && (sc_engine->axisBreakLeft() <= value && sc_engine->axisBreakRight() >= value))
		return;

	int pw2 = qwtMin((int)painter->pen().width(), len) / 2;

	QwtScaleMap scaleMap = map();
	const QwtMetricsMap metricsMap = QwtPainter::metricsMap();
	QPoint pos = this->pos();

	int majLen = tickLength(QwtScaleDiv::MajorTick);

	if ( !metricsMap.isIdentity() ){
		/*
		   The perfect position of the ticks is important.
		   To avoid rounding errors we have to use
		   device coordinates.
		 */
		QwtPainter::resetMetricsMap();

		pos = metricsMap.layoutToDevice(pos);

		if ( orientation() == Qt::Vertical ){
			scaleMap.setPaintInterval(
				metricsMap.layoutToDeviceY((int)scaleMap.p1()),
				metricsMap.layoutToDeviceY((int)scaleMap.p2())
			);
			len = metricsMap.layoutToDeviceX(len);
			majLen = metricsMap.layoutToDeviceX(majLen);
		} else {
			scaleMap.setPaintInterval(
				metricsMap.layoutToDeviceX((int)scaleMap.p1()),
				metricsMap.layoutToDeviceX((int)scaleMap.p2())
			);
			len = metricsMap.layoutToDeviceY(len);
			majLen = metricsMap.layoutToDeviceY(majLen);
		}
	}

	const int clw = d_plot->canvasLineWidth();
	const int tval = scaleMap.transform(value);

	bool draw = false;
	if ( orientation() == Qt::Vertical ){
		int low = (int)scaleMap.p2() + majLen;
		int high = (int)scaleMap.p1() - majLen;
		if ((tval > low && tval < high) ||
			(tval > high && !d_plot->axisEnabled (QwtPlot::xBottom) && !clw) ||
			(tval < low && !d_plot->axisEnabled(QwtPlot::xTop) && !clw)) draw = true;
	} else {
		int low = (int)scaleMap.p1() + majLen;
		int high = (int)scaleMap.p2() - majLen;
		if ((tval > low && tval < high) ||
			(tval > high && !d_plot->axisEnabled(QwtPlot::yRight) && !clw) ||
			(tval < low && !d_plot->axisEnabled(QwtPlot::yLeft) && !clw)) draw = true;
	}

	if (draw){
		switch(alignment()){
			case LeftScale:
			{
				QwtPainter::drawLine(painter, pos.x() + pw2, tval, pos.x() + len, tval);
				break;
			}
			case RightScale:
			{
				QwtPainter::drawLine(painter, pos.x() - pw2, tval, pos.x() - len, tval);
				break;
			}
			case BottomScale:
			{
				QwtPainter::drawLine(painter, tval, pos.y() - pw2, tval, pos.y() - len);
				break;
			}
			case TopScale:
			{
				QwtPainter::drawLine(painter, tval, pos.y() + pw2, tval, pos.y() + len);
				break;
			}
		}
	}
	QwtPainter::setMetricsMap(metricsMap); // restore metrics map
}

void ScaleDraw::drawLabel(QPainter *painter, double value) const
{
	if (!d_plot)
		return;

	ScaleEngine *sc_engine = (ScaleEngine *)d_plot->axisScaleEngine(axis());
	if (sc_engine->hasBreak() && sc_engine->axisBreakLeft() <= value && sc_engine->axisBreakRight() > value)
		return;

	QwtValueList majTicks = scaleDiv().ticks(QwtScaleDiv::MajorTick);
	if (majTicks.contains(value)){
		switch (d_show_ticks_policy){
			case ShowAll:
			break;

			case HideBegin:
				if (majTicks.first() == value)
					return;
			break;
			case HideEnd:
				if (majTicks.last() == value)
					return;
			break;
			case HideBeginEnd:
				if (majTicks.first() == value || majTicks.last() == value)
					return;
			break;
		}
	}

	QwtText lbl = tickLabel(painter->font(), value);
	if ( lbl.isEmpty() )
		return;

	QPoint pos = labelPosition(value);

	QSize labelSize = lbl.textSize(painter->font());
	if ( labelSize.height() % 2 )
		labelSize.setHeight(labelSize.height() + 1);

	const QwtMetricsMap metricsMap = QwtPainter::metricsMap();
	QwtPainter::resetMetricsMap();

	labelSize = metricsMap.layoutToDevice(labelSize);
	pos = metricsMap.layoutToDevice(pos);

	painter->save();
	painter->setMatrix(labelMatrix( pos, labelSize), true);

	if (d_selected)
		lbl.setBackgroundPen(QPen(Qt::blue));
	else
		lbl.setBackgroundPen(QPen(Qt::NoPen));

	lbl.setRenderFlags(labelAlignment());

	lbl.draw (painter, QRect(QPoint(0, 0), labelSize) );

	QwtPainter::setMetricsMap(metricsMap); // restore metrics map

	painter->restore();
}

//.........这里部分代码省略.........
            break;
        }
        default:
            return;
    }

    const QwtScaleWidget *scaleWidget = axisWidget(axisId);
    scaleWidget->drawTitle(painter, align, rect);

    painter->save();
    painter->setFont(scaleWidget->font());

    QwtScaleDraw *sd = (QwtScaleDraw *)scaleWidget->scaleDraw();
    const QPoint sdPos = sd->pos();
    const int sdLength = sd->length();

    sd->move(x, y);
    sd->setLength(w);

#if QT_VERSION < 0x040000
    sd->draw(painter, scaleWidget->palette().active());
#else
    QPalette palette = scaleWidget->palette();
    palette.setCurrentColorGroup(QPalette::Active);
    sd->draw(painter, palette);
#endif
    // reset previous values
    sd->move(sdPos); 
    sd->setLength(sdLength); 

    painter->restore();
}

/*!
  Print the canvas into a given rectangle.

  \param painter Painter
  \param map Maps mapping between plot and paint device coordinates
  \param canvasRect Bounding rectangle
  \param pfilter Print filter
  \sa QwtPlotPrintFilter
*/

void QwtPlot::printCanvas(QPainter *painter, const QRect &canvasRect,
    const QwtArray<QwtScaleMap> &map, const QwtPlotPrintFilter &pfilter) const
{
    if ( pfilter.options() & QwtPlotPrintFilter::PrintCanvasBackground )
    {
        painter->setPen(Qt::NoPen);

        QBrush bgBrush;
#if QT_VERSION >= 0x040000
            bgBrush = canvas()->palette().brush(backgroundRole());
#else
        QColorGroup::ColorRole role =
            QPalette::backgroundRoleFromMode( backgroundMode() ); 
        bgBrush = canvas()->colorGroup().brush( role );
#endif
        painter->setBrush(bgBrush);
        
        int x1 = 0;
        int x2 = 0;
        int y1 = 0;
        int y2 = 0;

#if QT_VERSION >= 0x040000
        switch(painter->device()->paintEngine()->type())
        {
            case QPaintEngine::PostScript:
                x2 = 1;
                y2 = 1;
                break;
            default:;
        }
#endif

        const QwtMetricsMap map = QwtPainter::metricsMap();
        x1 = map.screenToLayoutX(x1);
        x2 = map.screenToLayoutX(x2);
        y1 = map.screenToLayoutY(y1);
        y2 = map.screenToLayoutY(y2);

        QwtPainter::drawRect(painter, 
            canvasRect.x() + x1, canvasRect.y() + y1, 
            canvasRect.width() - x2, canvasRect.height() - y2); 
    }
    else
    {
        // Paint the canvas borders instead.
        painter->setPen(QPen(Qt::black));
        painter->setBrush(QBrush(Qt::NoBrush));
        QwtPainter::drawRect(painter, canvasRect); 
    }


    painter->setClipping(true);
    QwtPainter::setClipRect(painter, canvasRect);

    drawItems(painter, canvasRect, map, pfilter);
}