Questions

The numeric axis in our app weirdly displays the range from -2000 until 8000, even if it has or hasn’t got data series appended to it. I tried setting the VisibleRange and VisibleRangeLimit when creating the axis, but still no results. Here’s a piece of the code:

new SCINumericAxis
{
   AxisAlignment = SCIAxisAlignment.Left,
   AxisId = "axis_id",
   TextFormatting = " 0%",
   VisibleRangeLimit = new SCIDoubleRange(-30, 100),
   VisibleRange = new SCIDoubleRange(-30, 100)
};

The Y values that we have are doubles, example:

[0]: 98.26171875
[1]: 0
[2]: NaN
[3]: 98.26171875
[4]: 0
[5]: NaN
[6]: 78.203125
[7]: NaN
[8]: 38.96484375
[9]: NaN
[10]: 98.28125
[11]: 0
[12]: NaN
[13]: 68.22265625
[14]: 0

So just by looking at the values, we should have a data range from 0 to 100, but I think somehow it messes up the conversion and ends up with ridiculously large numbers. I’m not doing any additional operations on the data, the printed data above is the data from the XyDataSeries. The Y type is Double, the YMin is 0, the YMax is 98, but still ends up drawing the values until 10000.

It seems that if the axis is collapsed, all associated annotation labels are not visible (but their annotation line is visible).
Is there property or the like that will allow labels to be shown which are associated with a collapsed axis?

Is there an example of building a custom axis using a long or ulong?

So far I’ve tried implementing AxisBase and created necessary types for the given interfaces (IRange, IDeltaCalculator, IAxisDelta). But after implementing the minimum set of pieces, the chart comes up blank.

Also strangely the only two functions that get called on the AxisBase implementation are

GetDefaultNonZeroRange()
IsOfValidType() — This gets called with a DoubleRange rather than my ULongRange.. Somehow a DoubleRange is being introduced, but I can’t see how.

Is there any good documentation/design info out there about how to do this?

I have attached the solution I’ve been working with.

We are evaluating SciChart for use in our product which includes displaying higher precision date time information that the .NET framework DateTime can provide (1 tick = 100ns resolution).

I started by sub-classing the AxisBase class, but I am having issues finding documentation that could help in implement certain methods.

Some of the methods below are outlined–but a full, custom axis example (i.e. example of DateTimeAxis) would be of even greater help.

IRange CalculateYRange(RenderPassInfo renderPassInfo) — Is this only used for YAxis? How does orientation affect the range?

List GetSupportedTypes() — Is this supported IRange types? What types are these?

IRange GetDefaultNonZeroRange() — Is this just the smallest non-Undefined range? Else what is default?

void CalculateDelta() — This has no parameters or return values. The documentation is not clear on what members must need to be set here. Without any example it seem impossible to know how to implement this.

Why does IRange define Diff as type T? In the case of DateRange Diff becomes DateTime. Shouldn’t diff be of type TimeSpan? Are the ticks in the DateTime simply used as a TimeSpan type value? (Assuming Diff is the span of the range). I could implement IRange and use different types (DateTime and TimeSpan) respectively for Min/Max and Diff in this case (assuming I don’t need the templated version of the type.

Hi

We are using a simple SciChart setup like the following:

        <Grid Margin="20,45,50,20">

    <!--  Create the chart surface  -->
    <s:SciChartSurface Name="SparseValuesPlot" s:ThemeManager.Theme="Chrome">

        <!--  Declare RenderableSeries  -->
        <s:SciChartSurface.RenderableSeries>
            <s:FastLineRenderableSeries DataSeries="{Binding Values}" Style="{Binding PlotStyle, Converter={StaticResource plotStyleConverter}}" />
        </s:SciChartSurface.RenderableSeries>

        <!--  Create an X Axis  -->
        <s:SciChartSurface.XAxis>
            <s:NumericAxis AxisAlignment="Bottom" GrowBy="0.1, 0.1" AxisTitle="{Binding XAxisTitle}" AutoRange="Never" VisibleRange="{Binding XRange}" />
        </s:SciChartSurface.XAxis>

        <!--  Create a Y Axis  -->
        <s:SciChartSurface.YAxis>
            <s:NumericAxis AxisAlignment="Left" GrowBy="0.1, 0.1" AxisTitle="{Binding YAxisTitle}" AutoRange="Never" VisibleRange="{Binding YRange}" />
        </s:SciChartSurface.YAxis>

    </s:SciChartSurface>
</Grid>

Is there a way to fix the aspect ratio of the chart such that a unit on the x-axis is displayed with the same number of pixels than a unit on the y-axis?

Right now the chart is streched with the surrounding grid. I tried to set height and width of the SciChartSurface but this does not keep the relations because the axis label areas may take different amount of space.

Thanks
Julian

I getting a weird behavior on my xAxis and yAxis with a real time SciChart.

The labels on axes and the chart itself start shaking like it is trying to update positions but it never gets steady.

I have a background routine adding data to the data series every second and every chart have two series with 2 YAxis, there are only two charts visible in the window at a given time.

Also I have noticed that after a few minutes of doing this the window itself get sluggish and not responsive anymore, I switch to another tab which doesn’t have a chart it start responding again.

Have anyone seeing something like this?

I have tried the Performance Tips and Tricks but nothing changes this behavior.

I’m using a Surface 3 pro with SciChart version 3.3.0.5909

Here is my XAML and the dispatcher timer adding data to the dataseries.

<UserControl 
x:Class="PulseControl.CustomControls.RealTimeEnergy" 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:m="clr-namespace:PulseControl.Models"
xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions" 
xmlns:ee="http://schemas.microsoft.com/expression/2010/effects" 
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" 
xmlns:Custom="http://metro.mahapps.com/winfx/xaml/shared" 
xmlns:PulseControl="clr-namespace:PulseControl" 
xmlns:converters="clr-namespace:PulseControl.Converters" 
xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
xmlns:s="http://schemas.abtsoftware.co.uk/scichart" 
xmlns:cc="clr-namespace:PulseControl.CustomControls"
Width="Auto"
Background="{StaticResource WindowBackgroundBrush}" 
mc:Ignorable="d" d:DesignHeight="140" d:DesignWidth="600" d:DataContext="{d:DesignInstance {x:Type m:MainWindowsModel}}"
>
<UserControl.Resources>
    <ResourceDictionary>
        <converters:IntToKiloConverter x:Key="Int2Kilo" />
    </ResourceDictionary>
</UserControl.Resources>

<DockPanel 
    Background="{StaticResource WindowBackgroundBrush}" >

    <Grid 
        DockPanel.Dock="Top"
        Height="140">
        <Grid.RowDefinitions>
            <RowDefinition Height="100"></RowDefinition>
            <RowDefinition Height="40"></RowDefinition>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="170"></ColumnDefinition>
            <ColumnDefinition Width="*"></ColumnDefinition>
            <ColumnDefinition Width="170"></ColumnDefinition>
        </Grid.ColumnDefinitions>


        <Border 
            Grid.Column="0"
            Grid.Row="0"
            CornerRadius="50"
            Width="170"
            Margin="0"
            Padding="0"
            Background="{StaticResource ColorLeftChartBrush}"
            BorderThickness="1">
            <TextBlock 
                Style="{StaticResource FieldTextBoxStyle}"
                Foreground="{StaticResource BlackBrush}"
                HorizontalAlignment="Center"
                Padding="0"
                Margin="0"
                FontSize="60"
                VerticalAlignment="Center"
                Text="{Binding Laser.OpData.AvgKiloVoltagePerSecond, Mode=OneWay, StringFormat={}{0:N1}}">
            </TextBlock>
        </Border>

        <Label
            Grid.Column="0"
            Grid.Row="1"
            Style="{StaticResource FieldLabelStyle}"
            FontSize="20"
            HorizontalAlignment="Center"
            VerticalAlignment="Top">
            Voltage (kV)
        </Label>


        <s:SciChartSurface 
            Name="sciChart" 
            Grid.Column="1"
            Grid.RowSpan="2"
            Height="140"
            Background="{StaticResource WindowBackgroundBrush}"
            s:SciChartGroup.VerticalChartGroup="OPERATION"
            Width="Auto"
            Margin="0"
            Padding="8 8 8 10"
            RenderPriority="Low"
            MaxFrameRate="30">

            <s:SciChartSurface.RenderableSeries>

                <s:FastMountainRenderableSeries 
                    x:Name="serieVoltage" 
                    SeriesColor="{StaticResource ColorLeftChart}" 
                    StrokeThickness="2"
                    YAxisId="LAXIS"
                    DataSeries="{Binding ChartData.ChartDataVoltage}">
                    <s:FastMountainRenderableSeries.AreaBrush>
                        <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                            <GradientStop Color="#A860a917" Offset="0"/>
                            <GradientStop Color="#3360a917" Offset="1"/>
                        </LinearGradientBrush>
                    </s:FastMountainRenderableSeries.AreaBrush>
                </s:FastMountainRenderableSeries>

                <s:FastMountainRenderableSeries 
                    x:Name="serieEnergy" 
                    SeriesColor="{StaticResource ColorRightChart}" 
                    StrokeThickness="2"
                    YAxisId="RAXIS"
                    DataSeries="{Binding ChartData.ChartDataEnergy}">
                    <s:FastMountainRenderableSeries.AreaBrush>
                        <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                            <GradientStop Color="#A83376E5" Offset="0"/>
                            <GradientStop Color="#333376E5" Offset="1"/>
                        </LinearGradientBrush>
                    </s:FastMountainRenderableSeries.AreaBrush>
                </s:FastMountainRenderableSeries>

            </s:SciChartSurface.RenderableSeries>

            <s:SciChartSurface.XAxis >
                <s:DateTimeAxis Name="xAxis" AutoRange="Always"  IsStaticAxis="True" TextFormatting="dd HH:mm" SubDayTextFormatting="HH:mm:ss" CursorTextFormatting = "mm:ss" Foreground="White"  />
            </s:SciChartSurface.XAxis>

            <s:SciChartSurface.YAxes>
                <s:NumericAxis 
                    AutoRange="Always" 
                    GrowBy="0,0.5"
                    IsPrimaryAxis="True"
                    AxisAlignment="Right"
                    Id="RAXIS"
                    Style="{StaticResource NoMinorLines}">
                </s:NumericAxis>
                <s:NumericAxis 
                    AutoRange="Always" 
                    GrowBy="0,0.25"
                    IsPrimaryAxis="False"
                    Id="LAXIS"
                    AxisAlignment="Left"
                    Style="{StaticResource NoMinorLines}">
                </s:NumericAxis>
            </s:SciChartSurface.YAxes>

            <s:SciChartSurface.ChartModifier>
                <s:ModifierGroup>
                    <s:RubberBandXyZoomModifier IsEnabled="{Binding ChartData.ZoomEnabled, Mode=TwoWay}" IsXAxisOnly="True"></s:RubberBandXyZoomModifier>
                    <s:ZoomPanModifier IsEnabled="{Binding ChartData.PanEnabled, Mode=TwoWay}"></s:ZoomPanModifier>
                    <s:MouseWheelZoomModifier IsEnabled="{Binding ChartData.MouseWheelEnabled, Mode=TwoWay}"></s:MouseWheelZoomModifier>
                    <s:RolloverModifier IsEnabled="{Binding ChartData.RolloverEnabled, Mode=TwoWay}"></s:RolloverModifier>
                    <s:CursorModifier IsEnabled="{Binding ChartData.CursorEnabled, Mode=TwoWay}"></s:CursorModifier>
                    <s:YAxisDragModifier></s:YAxisDragModifier>
                    <s:XAxisDragModifier></s:XAxisDragModifier>
                    <s:ZoomExtentsModifier></s:ZoomExtentsModifier>
                </s:ModifierGroup>
            </s:SciChartSurface.ChartModifier>

        </s:SciChartSurface>

        <Border 
            Grid.Column="2"
            Grid.Row="0"
            CornerRadius="50"
            Width="170"
            Margin="0"
            Padding="0"
            Background="{StaticResource ColorRightChartBrush}"
            BorderThickness="1">
            <TextBlock 
                Style="{StaticResource FieldTextBoxStyle}"
                Foreground="{StaticResource BlackBrush}"
                HorizontalAlignment="Center"
                Padding="0"
                Margin="0"
                FontSize="60"
                VerticalAlignment="Center"
                Text="{Binding Laser.OpData.AvgEnergyPerSecond, Mode=OneWay, StringFormat={}{0:N1}}">
            </TextBlock>
        </Border>

        <Label
            Grid.Column="2"
            Grid.Row="1"
            Style="{StaticResource FieldLabelStyle}"
            FontSize="20"
            HorizontalAlignment="Center"
            VerticalAlignment="Top">
            Energy (mJ)
        </Label>

    </Grid>

</DockPanel>

Model

void _timer_Tick(object sender, EventArgs e)
    {
        DateTime now = DateTime.Now;

            // Things to do when running
        SafeAddPoint(_chartDataEnergy, now, Laser.OpData.AvgEnergyPerSecond);
        SafeAddPoint(_chartDataEfficiency, now, Laser.OpData.ChamberEfficiency * 100.0);
        SafeAddPoint(_chartDataVoltage, now, Laser.OpData.AvgKiloVoltagePerSecond);
        SafeAddPoint(_chartDataPressure, now, Laser.OpData.Pressure);
        SafeAddPoint(_chartDataSigmaEnergy, now, Laser.OpData.SampleSigma);
        SafeAddPoint(_chartDataSigmaPercentage, now, Laser.OpData.SampleSigmaPercentage);
        SafeAddPoint(_chartDataTemperature, now, Laser.OpData.Temperature);
    }

    private void SafeAddPoint(IDataSeries serie, DateTime dt, double val)
    {
        if (serie.ParentSurface != null)
            using (serie.ParentSurface.SuspendUpdates())
                ((XyDataSeries<DateTime, double>)serie).Append(dt, val);
        else
            ((XyDataSeries<DateTime, double>)serie).Append(dt, val);
    }

I have a YAxis(NumericAxis) that indicates price, now I want to set different color to the label text(please see the uploaded image):

I’ve seen the ILabelProvider, but it seems to set string format.
How should I do?

I want to implement a behavior on all axes with a mouse wheel. After quite some searching and trying I came up with a solution (possibly?).
In my control there are dynamically created one x-axis and several y-axes on one or more charts in a chartgroup.

But from the samples I get the impression the standard way would be to use a Modifier or a behavior like XAxisDragModifier (which does not use Wheel). And all tries to use a modifier did not work (for different reasons see below for some. One also is that I am getting more and more modifiers and they start to interfere with each other – like wheel on center area).

What am I trying to do and how do I think I could solve it “non-standard” way:

User Story:
User wants to change zoom (or pan) via mousewheel on axis.
(
Details just for info. Complete user story:
User can click on Axis to select it (it gets highlighted or border around it) and then the user can change via MouseWheel the Zoom or Pan.
Selecting Pan is done by pressing CTRL Key while mousewheel use. Otherwise zoom.
)

Possible Solution:
How do I think I could solve the mousewheel event capture:
Create a custom Axis:

public class CustomAxis : NumericAxis
{
    protected override void OnMouseWheel(MouseWheelEventArgs e)
    {
        e.Handled = true;
        // Do zooming or paning
    }

}

Other options I ruled out:
Why can’t i use XAxisDragModifier? Besides it does not work with wheel: It does not work for me at all. Probably because my X-Axis has an ID. But that I don’t have during compile-time. So I cannot assign it. So my XAxisDragModifier does nothing.
Why do I not use YAxisDragModifier? Same problem. Several (unknown number) of YAxes with IDs i don’t have at compile time. I would have to add them at runtime. I have a custom behavior linking VMs to Axes and creating them. But debugging shows me that the Modifiers are not available at that time so I cannot add one.

Could this work? Or is there an obvious reason not to do it this way?
I would have to do the zoom and pan functions myself (I hope I can at this place)and I am using a custom ViewportManager as well.

On priority support tickets, a user just asked us how to show and hide the AxisTitle TextBlock without changing the AxisTitle.Text to string.Empty.

The solution uses attached properties and a small custom style, so we thought we’d post it below