C++ QwtMetricsMap::isIdentity方法代码示例

本文整理汇总了C++中QwtMetricsMap::isIdentity方法的典型用法代码示例。如果您正苦于以下问题：C++ QwtMetricsMap::isIdentity方法的具体用法？C++ QwtMetricsMap::isIdentity怎么用？C++ QwtMetricsMap::isIdentity使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QwtMetricsMap的用法示例。

在下文中一共展示了QwtMetricsMap::isIdentity方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: drawBreak

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();
  //}
}

开发者ID:mantidproject，项目名称:mantid，代码行数:59，代码来源:ScaleDraw.cpp

示例2: textSize

/*!
   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;
}

开发者ID:AlexKraemer，项目名称:RFID_ME_HW_GUI，代码行数:55，代码来源:qwt_text.cpp

示例3: drawTick

/*!
   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.........

开发者ID:szmurlor，项目名称:fiver，代码行数:101，代码来源:qwt_scale_draw.cpp

示例4: drawInwardTick

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
}

开发者ID:BackupTheBerlios，项目名称:qtiplot-svn，代码行数:85，代码来源:ScaleDraw.cpp

注：本文中的QwtMetricsMap::isIdentity方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。