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
var pres = new aspose.slides.Presentation();
try {
    // Get reference of the slide
    var slide = pres.getSlides().get_Item(0);
    // Add a clustered column chart on the slide
    var chart = slide.getShapes().addChart(aspose.slides.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", aspose.slides.SaveFormat.Pptx);
} finally {
    if (pres != null) {
        pres.dispose();
    }
}

Set Font Size of Legend

The Aspose.Slides for Node.js 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
var pres = new aspose.slides.Presentation();
try {
    var chart = pres.getSlides().get_Item(0).getShapes().addChart(aspose.slides.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", aspose.slides.SaveFormat.Pptx);
} finally {
    if (pres != null) {
        pres.dispose();
    }
}

Set Font Size of Individual Legend

The Aspose.Slides for Node.js 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
var pres = new aspose.slides.Presentation();
try {
    var chart = pres.getSlides().get_Item(0).getShapes().addChart(aspose.slides.ChartType.ClusteredColumn, 50, 50, 600, 400);
    var tf = chart.getLegend().getEntries().get_Item(1).getTextFormat();
    tf.getPortionFormat().setFontBold(aspose.slides.NullableBool.True);
    tf.getPortionFormat().setFontHeight(20);
    tf.getPortionFormat().setFontItalic(aspose.slides.NullableBool.True);
    tf.getPortionFormat().getFillFormat().setFillType(java.newByte(aspose.slides.FillType.Solid));
    tf.getPortionFormat().getFillFormat().getSolidFillColor().setColor(java.getStaticFieldValue("java.awt.Color", "BLUE"));
    pres.save("output.pptx", aspose.slides.SaveFormat.Pptx);
} finally {
    if (pres != null) {
        pres.dispose();
    }
}