Chart Calculations

Calculate Actual Values of Chart Elements

Aspose.Slides for PHP via Java provides a simple API for getting these properties. Properties of IAxis interface provide information about actual position of axis chart element (IAxis.getActualMaxValue, IAxis.getActualMinValue, IAxis.getActualMajorUnit, IAxis.getActualMinorUnit, IAxis.getActualMajorUnitScale, IAxis.getActualMinorUnitScale). It is necessary to call method IChart.validateChartLayout() previously to fill properties with actual values.

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::Area, 100, 100, 500, 350);
    $chart->validateChartLayout();
    $maxValue = $chart->getAxes()->getVerticalAxis()->getActualMaxValue();
    $minValue = $chart->getAxes()->getVerticalAxis()->getActualMinValue();
    $majorUnit = $chart->getAxes()->getHorizontalAxis()->getActualMajorUnit();
    $minorUnit = $chart->getAxes()->getHorizontalAxis()->getActualMinorUnit();
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Calculate Actual Position of Parent Chart Elements

Aspose.Slides for PHP via Java provides a simple API for getting these properties. Properties of IActualLayout interface provide information about actual position of parent chart element (IActualLayout.getActualX, IActualLayout.getActualY, IActualLayout.getActualWidth, IActualLayout.getActualHeight). It is necessary to call method IChart.validateChartLayout() previously to fill properties with actual values.

  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::ClusteredColumn, 100, 100, 500, 350);
    $chart->validateChartLayout();
    $x = $chart->getPlotArea()->getActualX();
    $y = $chart->getPlotArea()->getActualY();
    $w = $chart->getPlotArea()->getActualWidth();
    $h = $chart->getPlotArea()->getActualHeight();
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Hide Information from Chart

This topic helps you to understand how to hide information from chart. Using Aspose.Slides for PHP via Java you can hide Title, Vertical Axis, Horizontal Axis and Grid Lines from chart. Below code example shows how to use these properties.

  $pres = new Presentation();
  try {
    $slide = $pres->getSlides()->get_Item(0);
    $chart = $slide->getShapes()->addChart(ChartType::LineWithMarkers, 140, 118, 320, 370);
    # Hiding chart Title
    $chart->setTitle(false);
    # /Hiding Values axis
    $chart->getAxes()->getVerticalAxis()->setVisible(false);
    # Category Axis visibility
    $chart->getAxes()->getHorizontalAxis()->setVisible(false);
    # Hiding Legend
    $chart->setLegend(false);
    # Hiding MajorGridLines
    $chart->getAxes()->getHorizontalAxis()->getMajorGridLinesFormat()->getLine()->getFillFormat()->setFillType(FillType::NoFill);
    for($i = 0; $i < java_values($chart->getChartData()->getSeries()->size()) ; $i++) {
      $chart->getChartData()->getSeries()->removeAt($i);
    }
    $series = $chart->getChartData()->getSeries()->get_Item(0);
    $series->getMarker()->setSymbol(MarkerStyleType::Circle);
    $series->getLabels()->getDefaultDataLabelFormat()->setShowValue(true);
    $series->getLabels()->getDefaultDataLabelFormat()->setPosition(LegendDataLabelPosition->Top);
    $series->getMarker()->setSize(15);
    # Setting series line color
    $series->getFormat()->getLine()->getFillFormat()->setFillType(FillType::Solid);
    $series->getFormat()->getLine()->getFillFormat()->getSolidFillColor()->setColor(java("java.awt.Color")->MAGENTA);
    $series->getFormat()->getLine()->setDashStyle(LineDashStyle->Solid);
    $pres->save("HideInformationFromChart.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }