C++ (Cpp) QwtScaleWidget::setScaleDiv 예제들

예제 #1

파일: qwt_plot_axis.cpp 프로젝트: DMachuca/ar2tech-SGeMS-public

//! Rebuild the scales and maps
void QwtPlot::updateAxes() 
{
    // Find bounding interval of the item data
    // for all axes, where autoscaling is enabled
    
    QwtDoubleInterval intv[axisCnt];

    const QwtPlotItemList& itmList = itemList();

    QwtPlotItemIterator it;
    for ( it = itmList.begin(); it != itmList.end(); ++it )
    {
        const QwtPlotItem *item = *it;

        if ( !item->testItemAttribute(QwtPlotItem::AutoScale) )
            continue;

        if ( axisAutoScale(item->xAxis()) || axisAutoScale(item->yAxis()) )
        {
            const QwtDoubleRect rect = item->boundingRect();
            intv[item->xAxis()] |= QwtDoubleInterval(rect.left(), rect.right());
            intv[item->yAxis()] |= QwtDoubleInterval(rect.top(), rect.bottom());
        }
    }

    // Adjust scales

    for (int axisId = 0; axisId < axisCnt; axisId++)
    {
        AxisData &d = *d_axisData[axisId];

        double minValue = d.minValue;
        double maxValue = d.maxValue;
        double stepSize = d.stepSize;

        if ( d.doAutoScale && intv[axisId].isValid() )
        {
            d.scaleDiv.invalidate();

            minValue = intv[axisId].minValue();
            maxValue = intv[axisId].maxValue();

            d.scaleEngine->autoScale(d.maxMajor, 
                minValue, maxValue, stepSize);
        }
        if ( !d.scaleDiv.isValid() )
        {
            d.scaleDiv = d.scaleEngine->divideScale(
                minValue, maxValue, 
                d.maxMajor, d.maxMinor, stepSize);
        }

        QwtScaleWidget *scaleWidget = axisWidget(axisId);
        scaleWidget->setScaleDiv(
            d.scaleEngine->transformation(), d.scaleDiv);

        int startDist, endDist;
        scaleWidget->getBorderDistHint(startDist, endDist);
        scaleWidget->setBorderDist(startDist, endDist);
    }

    for ( it = itmList.begin(); it != itmList.end(); ++it )
    {
        QwtPlotItem *item = *it;
        item->updateScaleDiv( *axisScaleDiv(item->xAxis()),
            *axisScaleDiv(item->yAxis()));
    }
}