Chart Legend

Legend Positioning

In order to set the legend properties. Please follow the steps below:

• Create an instance of Presentation class.
• Get reference of the slide.
• Adding a chart on slide.
• Setting the properties of legend.
• Write the presentation as a PPTX file.

In the example given below, we have set the position and size for Chart legend.

  # Create an instance of Presentation class
  $pres = new Presentation();
  try {
    # Get reference of the slide
    $slide = $pres->getSlides()->get_Item(0);
    # Add a clustered column chart on the slide
    $chart = $slide->getShapes()->addChart(ChartType::ClusteredColumn, 50, 50, 500, 500);
    # Set Legend Properties
    $chart->getLegend()->setX(50 / $chart->getWidth());
    $chart->getLegend()->setY(50 / $chart->getHeight());
    $chart->getLegend()->setWidth(100 / $chart->getWidth());
    $chart->getLegend()->setHeight(100 / $chart->getHeight());
    # Write presentation to disk
    $pres->save("Legend_out.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Set Font Size of Legend

The Aspose.Slides for PHP via Java lets developers allow to set font size of legend. Please follow the steps below: 

• Instantiate Presentation class.
• Creating the default chart.
• Set the Font Size.
• Set minimum axis value.
• Set maximum axis value.
• Write presentation to disk.

  # Create an instance of Presentation class
  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::ClusteredColumn, 50, 50, 600, 400);
    $chart->getLegend()->getTextFormat()->getPortionFormat()->setFontHeight(20);
    $chart->getAxes()->getVerticalAxis()->setAutomaticMinValue(false);
    $chart->getAxes()->getVerticalAxis()->setMinValue(-5);
    $chart->getAxes()->getVerticalAxis()->setAutomaticMaxValue(false);
    $chart->getAxes()->getVerticalAxis()->setMaxValue(10);
    $pres->save("output.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }

Set Font Size of Individual Legend

The Aspose.Slides for PHP via Java lets developers allow to set font size of individual legend entries. Please follow the steps below: 

• Instantiate Presentation class.
• Creating the default chart.
• Access legend entry.
• Set the Font Size.
• Set minimum axis value.
• Set maximum axis value.
• Write presentation to disk.

  # Create an instance of Presentation class
  $pres = new Presentation();
  try {
    $chart = $pres->getSlides()->get_Item(0)->getShapes()->addChart(ChartType::ClusteredColumn, 50, 50, 600, 400);
    $tf = $chart->getLegend()->getEntries()->get_Item(1)->getTextFormat();
    $tf->getPortionFormat()->setFontBold(NullableBool::True);
    $tf->getPortionFormat()->setFontHeight(20);
    $tf->getPortionFormat()->setFontItalic(NullableBool::True);
    $tf->getPortionFormat()->getFillFormat()->setFillType(FillType::Solid);
    $tf->getPortionFormat()->getFillFormat()->getSolidFillColor()->setColor(java("java.awt.Color")->BLUE);
    $pres->save("output.pptx", SaveFormat::Pptx);
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }