Axis of Xamarin.Android Chart (SfChart)

7 Oct 2020 / 24 minutes to read

Charts typically have two axes that are used to measure and categorize data: a vertical (Y) axis, and a horizontal (X) axis.

Vertical(Y) axis always uses numerical scale. Horizontal(X) axis supports the following types of scale:

  • Category
  • Numeric
  • Date time

The following APIs are available in ChartAxis:

  • VisibleLabels - Represents the axis label collection, which is visible in axis.
  • VisibleRange - Represents the Start and End range of an axis. The Delta property of VisibleRange represents the delta value.

Category Axis

Category axis displays text labels instead of numbers.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis();

    Category axis support in Xamarin.Android Chart

    Placing labels between ticks

    Labels in category axis can be placed between the ticks by using LabelPlacement property of categoryAxis. Default value of LabelPlacement is OnTicks i.e. labels will be placed on the ticks by default.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis() 
    { 
    	LabelPlacement = LabelPlacement.BetweenTicks 
    };

    Axis labels between ticks support in Xamarin.Android Chart

    Displaying labels after a fixed interval

    To display labels after a fixed interval n, you can use Interval property of ChartAxis. Default value of interval is 1 i.e. all the labels will be displayed by default.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis() 
    { 
    	Interval = 2, 
    	LabelPlacement = LabelPlacement.BetweenTicks 
    };

    Enable or disable the axis auto-interval support in Xamarin.Android Chart

    Indexed category axis

    Category axis can also be rendered based on the index values of data source by setting the ArrangeByIndex property to true in the axis.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis() 
    { 
    	ArrangeByIndex = false 
    };
    
    ColumnSeries series1 = new ColumnSeries()
     {
            ItemsSource = view.Data1,
            XBindingPath = "Country",
            YBindingPath = "Year2016"
     };
     ColumnSeries series2 = new ColumnSeries()
     {
            ItemsSource = view.Data2,
            XBindingPath = "Country",
            YBindingPath = "Year2016",
     };
    
    chart.Series.Add(series1);
    chart.Series.Add(series2);

    Category axis indexed feature support in Xamarin.Android Chart

    Numeric Axis

    Numeric axis uses numerical scale and displays numbers as labels.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new NumericalAxis();

    Numerical axis support in Xamarin.Android Chart

    Customizing numeric range

    To customize the range of an axis, you can use the Minimum and Maximum properties of NumericalAxis. By default, nice range will be calculated automatically based on the provided data.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	Minimum = 10, 
    	Maximum = 50
    };

    NumericalAxis range customization support in Xamarin.Android Chart

    Customizing numeric interval

    Axis interval can be customized using the Interval property of ChartAxis. By default, nice interval will be calculated based on the minimum and maximum value of the provided data.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	Interval = 10 
    };

    NumericalAxis interval customization support in Xamarin.Android Chart

    Apply padding to the range

    Padding can be applied to the minimum and maximum extremes of the axis range by using RangePadding property. Numeric axis supports the following types of padding.

    • None
    • Round
    • Additional
    • Normal
    • RoundStart
    • RoundEnd
    • PrependInterval
    • AppendInterval

    None

    When the value of RangePadding is None, padding will not be applied to the axis. This is also the default value of RangePadding for horizontal axis.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	RangePadding = NumericalPadding.None 
    };

    NumericalAxis range padding support in Xamarin.Android Chart

    Round

    When the value of RangePadding is Round, axis range will be rounded to the nearest possible value by the interval.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	RangePadding = NumericalPadding.Round 
    };

    NumericalAxis range padding support in Xamarin.Android Chart

    Additional

    When the value of RangePadding is Additional, axis range will be rounded and an interval of the axis will be added as padding to the minimum and maximum values of the range.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	RangePadding = NumericalPadding.Additional 
    };

    NumericalAxis range padding support in Xamarin.Android Chart

    Normal

    When the value of RangePadding is Normal, nice range will be calculated for the axis based on the best readability of the data. This is also the default for vertical axis.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	RangePadding = NumericalPadding.Normal 
    };

    NumericalAxis range padding support in Xamarin.Android Chart

    RoundStart

    When the value of RangePadding is RoundStart, axis range will be rounded in the start to the nearest possible value by the interval.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	RangePadding = NumericalPadding.RoundStart  
    };

    NumericalAxis range padding support in Xamarin.Android Chart

    RoundEnd

    When the value of RangePadding is RoundEnd, axis range will be rounded in the end to the nearest possible value by the interval.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	RangePadding = NumericalPadding.RoundEnd  
    };

    NumericalAxis range padding support in Xamarin.Android Chart

    PrependInterval

    When the value of RangePadding is PrependInterval, axis range will be rounded and an interval of the axis will be added in the start as padding to the minimum values of the range.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	RangePadding = NumericalPadding.PrependInterval 
    };

    NumericalAxis range padding support in Xamarin.Android Chart

    AppendInterval

    When the value of RangePadding is AppendInterval, axis range will be rounded and an interval of the axis will be added in the end as padding to the maximum values of the range.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new NumericalAxis() 
    { 
    	RangePadding = NumericalPadding.AppendInterval 
    };

    NumericalAxis range padding support in Xamarin.Android Chart

    Auto Interval On Zooming

    AutoIntervalOnZoomingEnabledproperty determines the update of axis interval based on the current visible range while zooming the chart. Default value of this property is true. If this property is false, the nice interval will not be calculated for new range after zoom in and actual Interval will be sustained.

  • c#
  • [C#]
    
    NumericalAxis primaryAxis = new NumericalAxis()
    {
        AutoIntervalOnZoomingEnabled = true
    };

    Date Time Axis

    Date time axis uses date time scale and displays date time values as axis labels in specified format.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis();

    DateTime axis support in Xamarin.Android Chart

    Customizing date time range

    To customize the range of an axis, you can use the Minimum and Maximum properties of DateTimeAxis. By default, nice range will be calculated automatically based on the provided data.

  • c#
  • [C#]
    
    Calendar calendar = new GregorianCalendar(2010, 1,1);
    DateTimeAxis dateTimeAxis = new DateTimeAxis();
    dateTimeAxis.Minimum = calendar.Time;
    calendar.Set(2015, 12,30);
    dateTimeAxis.Maximum = calendar.Time;
    chart.PrimaryAxis = dateTimeAxis;

    DateTimeAxis range customization support in Xamarin.Android Chart

    Date time intervals

    Date time intervals can be customized using Interval and IntervalType properties of the DateTimeAxis. For example, setting Interval as 2 and IntervalType as Years will consider 2 years as interval.

    Essential Chart supports the following types of interval for date time axis

    • Years
    • Months
    • Days
    • Hours
    • Minutes
    • Seconds
    • Milliseconds
  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis() 
    { 
    	IntervalType = DateTimeIntervalType.Months, 
    	Interval = 6
    };

    DateTimeAxis interval support in Xamarin.Android Chart

    Apply padding to the range

    Padding can be applied to the minimum and maximum extremes of the range by using RangePadding property. Date time axis supports the following types of padding:

    • None
    • Round
    • Additional
    • RoundStart
    • RoundEnd
    • PrependInterval
    • AppendInterval

    None

    When the value of RangePadding is None, padding will not be applied to the axis. This is also the default value of RangePadding.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis() 
    { 
    	RangePadding = DateTimeRangePadding.None 
    };

    DateTimeAxis range padding support in Xamarin.Android Chart

    Round

    When the value of RangePadding is round, axis range will be rounded to the nearest possible date time value.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis() 
    { 
    	RangePadding = DateTimeRangePadding.Round 
    };

    DateTimeAxis range padding support in Xamarin.Android Chart

    Additional

    When the value of RangePadding is Additional, range will be rounded and date time interval of the axis will be added as padding to the minimum and maximum extremes of the range.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis() 
    { 
    	RangePadding = DateTimeRangePadding.Additional 
    };

    DateTimeAxis range padding support in Xamarin.Android Chart

    RoundStart

    When the value of RangePadding is RoundStart, axis range will be rounded in the start to the nearest possible date time value.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis() 
    { 
    	RangePadding = DateTimeRangePadding.RoundStart 
    };

    DateTimeAxis range padding support in Xamarin.Android Chart

    RoundEnd

    When the value of RangePadding is RoundEnd, axis range will be rounded in the end to the nearest possible date time value.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis() 
    { 
    	RangePadding = DateTimeRangePadding.RoundEnd 
    };

    DateTimeAxis range padding support in Xamarin.Android Chart

    PrependInterval

    When the value of RangePadding is PrependInterval, range will be rounded and date time interval of the axis will be added in the start as padding to the minimum extremes of the range.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis() 
    { 
    	RangePadding = DateTimeRangePadding.PrependInterval 
    };

    DateTimeAxis range padding support in Xamarin.Android Chart

    AppendInterval

    When the value of RangePadding is AppendInterval, range will be rounded and date time interval of the axis will be added in the end as padding to the maximum extremes of the range.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis() 
    { 
    	RangePadding = DateTimeRangePadding.AppendInterval 
    };

    DateTimeAxis range padding support in Xamarin.Android Chart

    Date-time category axis

    The DateTimeCategoryAxis is a unique type of axis used mainly with financial series. Like CategoryAxis, all the data points are plotted with equal spaces by removing space for missing dates. Intervals and ranges for the axis are calculated similar to DateTimeAxis. There will be no visual gaps between points even when the difference between two points is more than a year. The following APIs are used to customize the interval of DateTimeCategoryAxis.

    Interval - Gets or sets the double value that represents the interval between the labels.
    IntervalType - Gets or sets the DateTimeIntervalType that represents the type of the interval to be displayed.

  • c#
  • [C#]
    
    DateTimeCategoryAxis xAxis = new DateTimeCategoryAxis();
    xAxis.Interval = 1;
    xAxis.IntervalType = DateTimeIntervalType.Months;
    chart.PrimaryAxis = xAxis;

    DateTimeCategory axis support in Xamarin.Android Chart

    Logarithmic Axis

    Logarithmic axis uses logarithmic scale and displays numbers as axis labels.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new LogarithmicAxis();

    Logarithmic axis support in Xamarin.Android Chart

    Customizing the logarithmic range

    To customize the range of log axis, you can use the Minimum and Maximum properties of LogarithmicAxis. By default, nice range will be calculated automatically based on the provided data.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new LogarithmicAxis()
    {
        Minimum = 100,
        Maximum = 10000
    };

    LogarithmicAxis range customization support in Xamarin.Android Chart

    Logarithmic Base

    To change the log base value, you can use LogarithmicBase property.

  • c#
  • [C#]
    
    chart.SecondaryAxis = new LogarithmicAxis()
    {
        LogarithmicBase = 2
    };

    LogarithmicAxis base support in Xamarin.Android Chart

    Common Axis Features

    Customization of features such as axis title, labels, grid lines and tick lines are common to all the axes. Each of these features are explained in this section.

    Axis Visibility

    Axis visibility can be controlled using the Visibility property of axis. Default value of Visibility is Visible.

  • c#
  • [C#]
    
    chart.SecondaryAxis.Visibility = Visibility.Gone;

    Axis visibility support in Xamarin.Android Chart

    Axis Title

    The Title in axis provides options to customize the text and font of axis title. Axis does not display title by default. The title can be customized using following properties,

    • Text – used to set the title for axis.
    • TextColor – used to change the color of the label.
    • BackgroundColor – used to change the label background color.
    • StrokeColor – used to change the border color.
    • StrokeWidth – used to change the width of the border.
    • TextSize – used to change the text size.
    • Typeface – used to change the font family and font weight.
    • MarginTop - used to change the top margin of the title.
    • MarginBottom - used to change the bottom margin of the title.
    • MarginLeft - used to change the left margin of the title.
    • MarginRight - used to change the right margin of the title.

    Following code snippet illustrates how to enable and customize the axis title.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis();
    chart.PrimaryAxis.Title.Text = "Month";
    chart.PrimaryAxis.Title.TextColor = Color.Blue;
    chart.PrimaryAxis.Title.TextSize = 16;
    chart.PrimaryAxis.Title.Typeface = Typeface.DefaultBold;

    Axis title support in Xamarin.Android Chart

    Label customization

    The LabelStyle property of axis provides options to customize the font-family, color, size and font-weight of axis labels. The axis labels can be customized using following properties:

    • TextColor – used to change the color of the labels.
    • BackgroundColor – used to change the label background color.
    • StrokeColor – used to change the border color.
    • StrokeWidth – used to change the thickness of the border.
    • TextSize – used to change the text size.
    • Typeface – used to change the font family and font weight.
    • MarginTop - used to change the top margin of the labels.
    • MarginBottom - used to change the bottom margin of the labels.
    • MarginLeft - used to change the left margin of the labels.
    • MarginRight - used to change the right margin of the labels.
    • LabelAlignment - Used to align the label at the Start, Center, or End.
    • CornerRadius - Used to change the corner radius of the background of labels.
    • MaxWidth - Provides the maximum text width of the axis label and wraps into the next line when exceeds the maximum width.
    • WrappedLabelAlignment - Positions the wrapped text at the start, center, or end. The default value of the WrappedLabelAlignment property is Start.
  • c#
  • [C#]
    
    chart.PrimaryAxis.LabelStyle.TextColor = Color.Red;
    chart.PrimaryAxis.LabelStyle.TextSize = 12;
    chart.PrimaryAxis.LabelStyle.Typeface = Typeface.DefaultBold;

    Axis label customization support in Xamarin.Android Chart

    Format the Labels

    Axis labels can be formatted using LabelFormat property of ChartAxis. This supports all the SimpleDateFormat patterns for date time axis and all the DecimalFormat patterns for the number axis.

    Label and Tick Positioning

    Axis labels and ticks can be positioned Inside or outside the chart area by using LabelStyle.LabelsPosition and TickPosition properties of ChartAxis. By default labels and ticks will be positioned outside the chart area.

  • c#
  • [C#]
    
    chart.PrimaryAxis.LabelStyle.LabelsPosition = AxisElementPosition.Inside;
    chart.PrimaryAxis.TickPosition = AxisElementPosition.Inside;

    Axis labels and ticks positioning support in Xamarin.Android Chart

    Axis Label Rotation

    The axis label can be rotated by using LabelRotationAngle.

  • c#
  • [C#]
    
    chart.PrimaryAxis.LabelRotationAngle = 315;

    Axis label rotation support in Xamarin.Android Chart

    Edge Labels Placement

    Labels with long text at the edges of an axis may appear partially outside the chart. The EdgeLabelsDrawingMode property can be used to avoid the partial appearance of labels at the corners. Default mode is Center.

  • c#
  • [C#]
    
    chart.PrimaryAxis.EdgeLabelsDrawingMode = EdgeLabelsDrawingMode.Shift;

    Axis edge labels placement support in Xamarin.Android Chart

    Edge labels visibility

    The visibility of the edge labels in an axis can be controlled using EdgeLabelsVisibilityMode property.

    The following options are available in EdgeLabelsVisibilityMode,

    • Default - used to display the edge label based on auto interval calculations
    • Visible - used to display the edge labels (first and last label) irrespective of the auto interval calculation until zooming (i.e., in normal state).
    • AlwaysVisible - used to always display the edge labels even while zooming the chart.

    The following code example demonstrates the AlwaysVisible option while zooming.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new NumericalAxis()
    {
        EdgeLabelsVisibilityMode = EdgeLabelsVisibilityMode.AlwaysVisible
    };

    Axis line offset

    AxisLineOffset property can be used to set offset value for the axis line.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new NumericalAxis()
    {
        AxisLineOffset = 15,
    };

    Label extent

    The LabelExtent property allows to set the gap between axis labels and title. This is typically used to maintain the fixed gap between axis labels and title when the digits of the axis value changed in live update.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis()
    {
        LabelExtent = 50
    };

    Offset the rendering

    The PlotOffset property is used to offset the rendering of the axis at start and end position. The following code snippet demonstrates to apply the plot offset to both x and y axes.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis()
    {
        PlotOffset = 20
    };
    chart.SecondaryAxis = new NumericalAxis()
    {
        PlotOffset = 20
    };

    PlotOffset support for axis in Xamarin.Android Chart

    PlotOffsetStart

    The PlotOffsetStart property is used to offset the rendering of the axis at start position. The following code snippet demonstrates to apply the plot offset start to both x and y axes.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis()
    {
        PlotOffsetStart = 30
    };
    chart.SecondaryAxis = new NumericalAxis()
    {
        PlotOffsetStart = 30
    };

    PlotOffsetStart support for axis in Xamarin.Android Chart

    PlotOffsetEnd

    The PlotOffsetEnd property is used to offset the rendering of the axis at end position. The following code snippet demonstrates to apply the plot offset end to both x and y axes.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis()
    {
        PlotOffsetEnd = 30
    };
    chart.SecondaryAxis = new NumericalAxis()
    {
        PlotOffsetEnd = 30
    };

    PlotOffsetEnd support for axis in Xamarin.Android Chart

    Axis Line Customization

    The LineStyle properties are used to customize the axis line. The axis line can be customized using following properties:

    • StrokeColor - used to change the stroke color of the axis line.
    • StrokeWidth - used to change the stroke width of the axis line.
    • PathEffect - used to change the dotted line of axis line.
  • c#
  • [C#]
    
    chart.PrimaryAxis.LineStyle.StrokeWidth = 4;
    chart.PrimaryAxis.LineStyle.StrokeColor = Color.Blue;
    chart.PrimaryAxis.LineStyle.PathEffect = new DashPathEffect(new float[] { 4, 4 }, 3);

    Axis line customization support in Xamarin.Android Chart

    Grid Lines Customization

    The ShowMajorGridLines and ShowMinorGridLines properties are used to control the visibility of grid lines. MajorGridLineStyle and MinorGridLineStyle properties in axis are used to customize the major grid lines and minor grid lines of an axis respectively. By default minor grid lines will not be visible.

    The grid lines can be customized using following properties:

    • StrokeColor - used to change the stroke color of the grid lines
    • StrokeWidth - used to change the stroke width of the grid lines
    • PathEffect - used to change the dotted line of grid lines
  • c#
  • [C#]
    
    chart.SecondaryAxis.ShowMajorGridLines = true;
    chart.SecondaryAxis.ShowMinorGridLines = true;
    chart.SecondaryAxis.MinorTicksPerInterval = 2;

    Axis grid lines customization support in Xamarin.Android Chart

    Tick Lines Customization

    The MajorTickStyle and MinorTickStyle properties in axis are used to customize the major tick lines of an axis and minor tick lines of an axis respectively. They provide options to change the StrokeWidth, Size, StrokeColor and Visibility of tick lines. By default minor tick lines will not be visible. MinorTicksPerInterval property can be used to specify the number of minor ticks per interval that resided between the adjacent major ticks.

  • c#
  • [C#]
    
    NumericalAxis numericalAxis = new NumericalAxis();
    numericalAxis.MajorTickStyle.TickSize = 7;
    numericalAxis.MajorTickStyle.StrokeWidth = 3;
    numericalAxis.MajorTickStyle.StrokeColor = Color.Red;
    numericalAxis.ShowMinorGridLines = true;
    numericalAxis.MinorTicksPerInterval = 1;
    numericalAxis.MinorTickStyle.TickSize = 5;
    numericalAxis.MinorTickStyle.StrokeWidth = 2;
    numericalAxis.MinorTickStyle.StrokeColor = Color.Green;
    chart.SecondaryAxis = numericalAxis;

    Axis tick lines customization support in Xamarin.Android Chart

    Customize individual axis elements

    The RangeStyles can be used to customize the gridlines, ticks and axis labels for a specific region of ChartAxis. The following properties are used to customize the specific range in an axis:

  • c#
  • [C#]
    
    NumericalAxis numericalAxis = new NumericalAxis() { Minimum = 15, Maximum = 27 };
    
    ChartAxisRangeStyleCollection axisRangeStyles = new ChartAxisRangeStyleCollection();
    
    ChartAxisRangeStyle rangeStyle = new ChartAxisRangeStyle() { Start = 15, End = 21};
    
    rangeStyle.MajorGridLineStyle = new ChartLineStyle() { StrokeColor = Color.ParseColor("#096EBF"), StrokeWidth = 3 };
    
    rangeStyle.LabelStyle = new ChartAxisLabelStyle() { TextColor = Color.ParseColor("#096EBF"), Typeface = Typeface.DefaultBold }; 
    
    axisRangeStyles.Add(rangeStyle);
    
    ....
    
    numericalAxis.RangeStyles = axisRangeStyles;

    Individual axis elements customization support in Xamarin.Android Chart

    Inversing Axis

    Axis can be inversed using the Inversed property of axis. Default value is False.

  • c#
  • [C#]
    
    chart.SecondaryAxis.Inversed = true;

    Axis inverse support in Xamarin.Android Chart

    Placing Axes at the Opposite side

    The OpposedPosition property of axis can be used to place the axis at the opposite side of its default position. Default value is False.

  • c#
  • [C#]
    
    chart.SecondaryAxis.OpposedPosition = true;

    Opposed axis support in Xamarin.Android Chart

    Maximum number of labels per 100 pixels

    By default, a maximum of 3 labels are displayed for each 100 pixels in axis. The maximum number of labels that should be present within 100 pixels length can be customized using the MaximumLabels property of an axis. This property is applicable only for automatic range calculation and will not work if you set value for Interval property of an axis.

  • c#
  • [C#]
    
    chart.SecondaryAxis.MaximumLabels = 5;

    Maximum axis labels support in Xamarin.Android Chart

    AutoScrollingDelta

    AutoScrollingDelta is used to ensure that the specified range of data is always visible in the chart. It always shows the recently added data points at the end and scrolling will be reset to the end of the range whenever a new point is added.
    By adding ChartZoomPanBehavior to the chart, you can scroll to see the previous datapoints.

    AutoScrollingDeltaType

    In DateTimeAxis, you can apply auto scrolling delta value in Years, Months, Days, Hours, Minutes, Seconds and Milliseconds by setting AutoScrollingDeltaType property. Default value of this property is Auto and the delta will be calculated automatically based on range.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new DateTimeAxis()
    {
                    AutoScrollingDelta = 3,
                    AutoScrollingDeltaType = DateTimeDeltaType.Days
    };

    AutoScrollingMode

    AutoScrollingMode property can be used to determine whether the axis should be scrolled from start position or end position. The default value of AutoScrollingMode is End.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis()
    {
          AutoScrollingDelta = 3,
    	  
          AutoScrollingMode = ChartAutoScrollingMode.Start
    };

    Axis Crossing

    Axis can be positioned anywhere in the chart area by using CrossesAt property. This property specifies where the horizontal axis should intersect or cross the vertical axis or vice-versa. Default value of CrossesAt property is null.

  • c#
  • [C#]
    
    chart.PrimaryAxis  = new CategoryAxis() { CrossesAt = 0 };
    
    chart.SecondaryAxis =  new NumericalAxis() { CrossesAt  = 8 };

    AxisCrossing support in Xamarin.Android Chart

    Crossing a specific axis

    CrossingAxisName property takes axis Name as input and determines the axis that used for crossing. By default, all the horizontal axes cross in primary Y axis, and all the vertical axes cross in primary X axis.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis()
    {
        CrossesAt = 0,
    
        Name = "PrimaryAxis",
    
        CrossingAxisName = "SecondaryAxis"
    };
    
    chart.SecondaryAxis = new NumericalAxis()
    {
        CrossesAt = 2,
    
        Name = "YAxis",
    
        CrossingAxisName = "PrimaryAxis",
    };
    
    BubbleSeries series = new BubbleSeries()
    {
        ...
    
        YAxis = new NumericalAxis()
        {
            CrossesAt = 8,
    
            Name = "SecondaryAxis",
    
            CrossingAxisName = "PrimaryAxis",
        }
    };

    Crossing at Specific axis support in Xamarin.Android Chart

    Crossing in date time axis

    For crossing in date time horizontal axis, date object should be provided as value for CrossesAt property of vertical axis.

  • c#
  • [C#]
    
        chart.PrimaryAxis  = new DateTimeAxis() { CrossesAt = 0 };
    
        chart.SecondaryAxis =  new NumericalAxis() { CrossesAt  = new DateTime(2003, 1, 1) };

    NOTE

    Axis will be placed in the opposite side if the value of CrossesAt property is greater than the maximum value of crossing axis. Axis will be placed in the default position if the value of CrossesAt property is less than the minimum value of crossing axis.

    DateTimeAxis crosses at support in Xamarin.Android Chart

    Positioning the axis elements while crossing

    The RenderNextToCrossingValue property is used to determine whether the crossing axis should be placed at crossing position or not. The default value of RenderNextToCrossingValue property is true.

  • c#
  • [C#]
    
    chart.PrimaryAxis = new CategoryAxis()
    {
        CrossesAt = 20,
    
        RenderNextToCrossingValue = false
    };
    
    chart.SecondaryAxis = new NumericalAxis()
    {
        CrossesAt = 5
    };

    Positioning axis elements while crossing support in Xamarin.Android Chart

    Smart Axis Labels

    Axis labels may overlap with each other based on chart dimensions and label size. The LabelsIntersectAction property of axis is used to avoid overlapping of axis labels. The default value of the LabelsIntersectAction is None; other available values are MultipleRows, Hide, and Wrap.

  • c#
  • [C#]
    
    chart.PrimaryAxis.LabelsIntersectAction = AxisLabelsIntersectAction.MultipleRows;

    Smart axis labels support in Xamarin.Android Chart

    Events

    ActualRangeChanged

    The ActualRangeChanged event is triggered when the axis range is changed. The argument contains the following information.

    NOTE

    Actual range and visible range are similar unless the range is changed by specifying the ZoomPosition and ZoomFactor property or zoom the chart interactively. Visible range is always the range which you see visually in the screen.

    Label Clicked

    The LabelClicked event is triggered when an axis label is clicked. The Label argument contains the following information:

    • LabelContent - used to get or set the content of label.
    • Position - used to get or set the position of the label.

    Label Created

    The LabelCreated event is triggered when the axis label is created. The argument contains AxisLabel of ChartAxisLabel which contains following properties.

    • LabelContent - used to get or set the content of label.
    • Position - used to get or set the position of the label.
    • LabelStyle - used to customize the appearance of axis labels based on condition. The properties listed in Label customization can be customized using LabelStyle property.
    • IsVisible - used to define the visibility of labels.