Category: WPF

Hi!

I want to create a graph, where vertical line annotations are displayed at each column of a chart. I
have the vertical line annotations created like this:

xaml:

code behind

        statisticsChartAnnotations = new AnnotationCollection();
        Style sliceStyle = App.Current.FindResource("sliceStyle") as Style;
        if (displayedChartSeries.Count > 0)
        {
            foreach (DateTime datapoint in displayedChartSeries[0].DataSeries.XValues)
            {
                VerticalLineAnnotation a = new VerticalLineAnnotation()
                {
                    Style = sliceStyle,
                    X1 = datapoint,
                    IsEnabled = false,
                };
                StatisticsChartAnnotations.Add(a);

            }

        }

But when I display the first chart, the annotations are displayed by an offset from the columns. When i switch to the next chart, the annotations jump to the right positions. I attached a picture of the problem. First charts shows the initial positions.

I already tried refreshing the surface through viewportmanager and dataseries. Is this a known bug? is there any workaround? Is there a way to render the annotations right to the data points?

Thanks,
Kristóf

Hello ,

I have created a SimpleScatterChart3D application using the dll’s from SciChart Official Releases NuGet Feeds (myget) and when i plotted 20 thousand data points to the chart i am getting Access Violation Exception in SciChart.Charting.dll .

Can you please let us know how can i resolve this issue.

Thanks

I got this problem:

Any idea how to resolve this:

C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6 Tools>sgen.exe /assembly:F:\AMSV2\AMS\bin\Debug\AMS.exe
Microsoft (R) Xml Serialization support utility
[Microsoft (R) .NET Framework, Version 4.6.81.0]
Copyright (C) Microsoft Corporation. All rights reserved.
Error: Unable to generate a temporary class (result=1).
error CS0433: The type ‘XamlGeneratedNamespace.GeneratedInternalTypeHelper’ exists in both ‘f:\AMSV2\AMS\bin\Debug\SciChart.Charting.dll’ and ‘f:\AMSV2\AMS\bin\Debug\AMS.exe’
error CS0433: The type ‘XamlGeneratedNamespace.GeneratedInternalTypeHelper’ exists in both ‘f:\AMSV2\AMS\bin\Debug\SciChart.Charting.dll’ and ‘f:\AMSV2\AMS\bin\Debug\AMS.exe’

I’m implementing exporting charts. As part of my export, the user can specify the size of the chart. I’ve managed to get sciChartSurface.ExportToBitmapSource() working fine for single graphs.

However, I’ve got some quite complex layouts, and when I try to render parent controls that contain Scichart controls manually, with say:

ExportUIElement.Measure(size);
ExportUIElement.Arrange(new Rect(size));

 int dpiScaling = 3;
RenderTargetBitmap bmp = new RenderTargetBitmap(Width * dpiScaling, Height * dpiScaling,
                                                                                                           96 * dpiScaling, 96 * dpiScaling,
                                                                                                           PixelFormats.Pbgra32);

I’m finding everything working, the chart layout & axis/labels update and render fine, but the chart content is not re-rendered to the new size, causing some messy/strange visual effects. This one was arranged to a larger size, you can see that the actual chart content is now sitting snugly in the middle of a large margin:

Can I force Scichart to re-render these so I can manually render the component in a different size?

When I have cursor tooltips enabled, showing the y-values, they display properly until the y-valuse for the 1st series is below the axis y-min. Below the tooltip y-values are showing correctly

If I move the mouse to the left, below 25 Hz, the tooltip disappears as below.
How can I correct this?

Thanks,
Robert

What is the recommended way to use the same text formatting for both Axis and Annotation labels?

There are two scenarios.

1. When DateTimeAxis automatically change the format

When zooming DatetimeAxis, it automatically changes the text format in the label. For example if XAxis visible range is few seconds, it changes the format as HH:mm:ss. But still the annotation label shows the date. Please see attachement : DatetimeAxisAnnotationLabel.PNG

<sciChart:SciChartSurface.XAxis>
        <sciChart:DateTimeAxis Name="XAxisStartTime" AxisTitle="Start Time"/>
</sciChart:SciChartSurface.XAxis>

1. When XAxis has got a LabelFormatter

If there is a LabelFormatter, what is the recommended way to apply the same formatting for Annotation Label text?
Please see attachement : LabelFormatterAnnotationLabel.PNG (annotation label shows number of milliseconds)

<sciChart:SciChartSurface.XAxis>
<sciChart:NumericAxis Name="XAxisDuration" AxisTitle="Duration" LabelFormatter="{StaticResource TimeDurationAxisFormatter}" AxisMode="Logarithmic" />
</sciChart:SciChartSurface.XAxis>

Thanks!

with Version 3.61.0.7847 I can set Runtime license without problem
with v4.0.30319 the message “Der Typeninitialisierer für “” hat eine Ausnahme verursacht.” appear

Has anybody a solution?

Hi

I have experienced some performance issues when accessing YMin & YMax properties of data series containing lots of NaN’s.

I have a chart with the following setup:

XAxis = DateTime / YAxis = Numeric
1 FastLineRenderableSeries series / XyDataSeries<DateTime, double>

I have prefilled the data series with 1 million datapoints. Some of the values are randomly made NaN’s.

If 1/2 of the Y values are NaN’s – accessing YMin or YMax property takes ~117ms.
If 1/10 of the values are NaN’s it “only” takes ~27 ms.
…and if no NaN’s are added to the data series – it takes ~3ms;

This is a huge problem for us – as we have large data series including lots of NaN’s – and we must access the YMin / YMax each time data is added to do special scale fitting. This is normally once per second – but with up to 20 data series – (117ms * 2 *20 ) it takes over 4 seconds.

If I have 10 million datapoints – it takes 10 times as long – so it looks like it is recalculating the min/max each time.

/Flemming

My code is as below

for (int i = 0; i < plot.ZData.Length; i++)
{
var xData = plot.XData[i];
var yData = plot.YData[i];
for (int j = 0; j < xData.Length; j++)
{
dataSeries[i, j] = yData[j];
}
}

Here Z values and X values are linear and Y values are in Logarthimic scale.
I have used Z and Y axis as NumericAxis3D and X is LogarithmicNumericAxis3D .

Is something wrong here? Please suggest.

We have big trouble with SciChart 6.1. First was the initial loading time. But there is this async loading workaround.
Now if we try to render a simple (not large) signal into the chart, it hangs in the rendering loop. No exception, high CPU usage.
Any solution for this issue?

It works on some, but it fails on most of our PCs/Laptops.

What I need is 2 or more VerticalLineAnnotation which can be placed dynamically to act as cursors, showing the difference in value between the two using MVVM and am struggling where to start.

I have been looking at the thread
https://www.scichart.com/questions/question/editing-annotations-and-keeping-track-of-them-in-an-mvvm-application/
but am a bit clueless to what is happening as I am a beginner to C# and MVVM, and am struggling to understand.

I have firstly tried to change your AnnotationMvvm example to use an observable collection as suggested , so that values can be changes, but I can’t even get this to work, as LabelsSource is being returned as null, I am not sure if I have the dependency property correct.I am also not quite sure how the attach etc is working and will struggle to convert to using VerticalLineAnnotation too.

public static readonly DependencyProperty LabelsSourceProperty = DependencyProperty.Register("LabelsSource", typeof(ObservableCollection<IChartSeriesViewModel>), typeof(CustomAnnotationChartModifier), new PropertyMetadata(null, OnLabelsSourceChanged));

        // Here LabelsSource is IEnumerable, but you could easily make it ObservableCollection<LabelViewModel> 
        // in order to get changed notifications when items are added to, or removed from the collection
        public ObservableCollection<IChartSeriesViewModel> LabelsSource
        {
            get { return (ObservableCollection<IChartSeriesViewModel>)GetValue(LabelsSourceProperty); }
            set { SetValue(LabelsSourceProperty, value); }
        }

        // Get a notification when new labels are set.
        private static void OnLabelsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var modifier = (CustomAnnotationChartModifier) d;
            ObservableCollection<IChartSeriesViewModel> newValue = e.NewValue as ObservableCollection<IChartSeriesViewModel>;
            if (newValue == null) return;

modifier.RebuildAnnotations();
}

You say at the end of the thread, you are thinking of doing a good demo on how to do all this, I don’t suppose you could knock me one up using dynamic VerticalLine annotations (MVVM) as above with a display of the difference in the 2 values?

Thanks

We have a motion sensor for which we present a real time graph. As can be seen from the attached image, my YAxis configuration (auto range) causes the yaxis scale to display noise in a way that is rather disturbing (see attached image).
I have tried to do some fiddling with the axis settings, but with no luck so far.
The YAxis perfectly follows the measured data, but when there is practically no motion, the graph should be shown as an almost straight line, preferably not in the upper or lower end of the scale.

I’ve implemented the following ContextMenu:

  <s:SciChartSurface.ContextMenu>
            <ContextMenu>
                <MenuItem x:Name ="header1" Header="Einfügen" Command="{Binding InsertItem}" IsEnabled="{Binding SelectedElementsCount,Converter={StaticResource BoolToOppositeBoolConverter}}" />
                <MenuItem Header="Entfernen" Command="{Binding RemoveItem}" />
                <MenuItem x:Name ="header2" Header="Ändern" Command="{Binding ChangeItem}" IsEnabled="{Binding SelectedElementsCount,Converter={StaticResource BoolToOppositeBoolConverter}}" />
                <MenuItem x:Name ="header3" Header="Verschieben" Command="{Binding ChangeItem}" IsEnabled="{Binding SelectedElementsCount}" />
            </ContextMenu>
        </s:SciChartSurface.ContextMenu>

This still worked, but I have changed the AnnotationsCanvas from the Annotations to AboveChart and the Context Menu doesn’t show if I press the right mouse button:

<s:SciChartSurface.Annotations>

            <!-- Draws Bands behind each axis -->
            <s:BoxAnnotation YAxisId="Ch0" Style="{StaticResource BoxAnnotationStyle0}" X1="0" X2="1" Y1="{Binding VisibleRange.Min, ElementName=Ch0}" Y2="{Binding VisibleRange.Max, ElementName=Ch0}" AnnotationCanvas="AboveChart"  PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown" />
            <s:BoxAnnotation YAxisId="Ch1" Style="{StaticResource BoxAnnotationStyle1}" X1="0" X2="1" Y1="{Binding VisibleRange.Min, ElementName=Ch1}" Y2="{Binding VisibleRange.Max, ElementName=Ch1}" AnnotationCanvas="AboveChart"   PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown" />
            <s:BoxAnnotation YAxisId="Ch2" Style="{StaticResource BoxAnnotationStyle0}" X1="0" X2="1" Y1="{Binding VisibleRange.Min, ElementName=Ch2}" Y2="{Binding VisibleRange.Max, ElementName=Ch2}" AnnotationCanvas="AboveChart"  PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown" />
            <s:BoxAnnotation YAxisId="Ch3" Style="{StaticResource BoxAnnotationStyle1}" X1="0" X2="1" Y1="{Binding VisibleRange.Min, ElementName=Ch3}" Y2="{Binding VisibleRange.Max, ElementName=Ch3}" AnnotationCanvas="AboveChart" PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown" />

            <s:BoxAnnotation YAxisId="Ch1" Name="boxAnnotationCh1" Style="{StaticResource ScichartBoxAnnotationColor_Geometry}" BorderThickness="1" CornerRadius="0"
                             X1="{Binding Coord_CH1.X1,Mode=TwoWay}"  X2="{Binding Coord_CH1.X2,Mode=TwoWay}"  Y1="{Binding Coord_CH1.Y1,Mode=TwoWay}"  Y2="{Binding Coord_CH1.Y2,Mode=TwoWay}"
                             AnnotationCanvas="AboveChart"   PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown" />
            <s:BoxAnnotation YAxisId="Ch2" Name="boxAnnotationCh2"  Style="{StaticResource ScichartBoxAnnotationColor_Geometry}" BorderThickness="1" CornerRadius="3"
                             X1="{Binding Coord_CH2.X1}"  X2="{Binding Coord_CH2.X2}"  Y1="{Binding Coord_CH2.Y1}"  Y2="{Binding Coord_CH2.Y2}"
                             PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown"
                             AnnotationCanvas="AboveChart" />
            <s:BoxAnnotation YAxisId="Ch3" Name="boxAnnotationCh3"  Style="{StaticResource ScichartBoxAnnotationColor_Geometry}" BorderThickness="1" CornerRadius="3"
                             X1="{Binding Coord_CH3.X1}"  X2="{Binding Coord_CH3.X2}"  Y1="{Binding Coord_CH3.Y1}"  Y2="{Binding Coord_CH3.Y2}"
                             PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown" />

            <!-- Draws a Header line into each chart -->
            <s:TextAnnotation Text="{lex:Loc NominalGeometryInput:Resources:AxisDirection}" YAxisId="Ch1"  X1="0" X2="1" Y1="{Binding VisibleRange.Min, ElementName=Ch1}" Y2="{Binding VisibleRange.Max, ElementName=Ch1}" Style="{StaticResource ScichartChartHeaderStyle}"  AnnotationCanvas="AboveChart"  PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown" />
            <s:TextAnnotation Text="{lex:Loc NominalGeometryInput:Resources:AxisSuperelevation}" YAxisId="Ch2"  X1="0" X2="1" Y1="{Binding VisibleRange.Min, ElementName=Ch2}" Y2="{Binding VisibleRange.Max, ElementName=Ch2}" Style="{StaticResource ScichartChartHeaderStyle}"  AnnotationCanvas="AboveChart"  PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown" />
            <s:TextAnnotation Text="{lex:Loc NominalGeometryInput:Resources:AxisElevation}" YAxisId="Ch3"  X1="0" X2="1" Y1="{Binding VisibleRange.Min, ElementName=Ch3}" Y2="{Binding VisibleRange.Max, ElementName=Ch3}" Style="{StaticResource ScichartChartHeaderStyle}"  AnnotationCanvas="AboveChart"  PreviewMouseMove="BoxAnnotation_PreviewMouseMove" PreviewMouseDown="BoxAnnotation_PreviewMouseDown" />
        </s:SciChartSurface.Annotations>

After updating to SciChart 3.1, I started getting the following binding error:

System.Windows.Data Error: 4 : Cannot find source for binding with reference ‘RelativeSource FindAncestor, AncestorType=’Abt.Controls.SciChart.Visuals.SciChartSurfaceBase’, AncestorLevel=’1”. BindingExpression:Path=MaxFrameRate; DataItem=null; target element is ‘HighSpeedRenderSurface’ (Name=”); target property is ‘MaxFramerate’ (type ‘Nullable`1’)

I’m not binding MaxFrameRate anywhere nor do I have a HighSpeedRenderSurface explicitly defined in my code, so I’m guessing this error is occurring somewhere in a SciChart control.

I have several SciChartSurface elements across different controls in my application. I tried setting a global style:

<Style TargetType="{x:Type s:SciChartSurfaceBase}">
    <Setter Property="MaxFrameRate" Value="24"/>
</Style>

This had no effect on the binding error.

Any help would be appreciated since I think these errors are affecting the loading speed of my UI.

I am showing a dialog window with a ChartSurface in it. I have a context menu option to export to an image, and on window load I export to an XPS file. The dialog works fine if I do not use either feature, but once I do, I intermittently get an exception when showing the dialog. It appears to regularly take 3 instances of the dialog after the export feature is used to throw the exception, and the exception gets thrown twice the first time, threes times the second time, and so on. Again, if I do not use the export feature (no call to ExportToFile), I do not get any exceptions no matter how many times I show the dialog.

The exception message is “The provided DependencyObject is not a context for this Freezable. Parameter name: context”.

There are no other useful details in the exception from what I can see. Its all pretty abstract WPF stuff. The exported file/image seem to be generated accurately regardless of the exception.

I am using SciChart 4.2.2.9724, Visual Studio 2017 Professional, C#, WPF

Any ideas?

I downloaded your SciChart trial version. The download placed all you assemblies into:

C:\Program Files (x86)\SciChart\SciChart SDK\Lib\net452

and duplicated the assemblies into:

C:\Program Files (x86)\SciChart\SciChart SDK\Lib\netcoreapp3.0.

Then I download the SciChart examples from GitHub directly into Visual Studio and it created a repository at

C:\Users\Dell\source\repos\SciChart.Wpf.Examples\Examples

Then I tried to compile but the dependencies were not resolved in the project SciChart.Exmaples.ExternalDependencies. I get yellow warning signs next to all your SciChart assemblies (e.g. SciChart.DirectX). Please advise.

Hello Team,

We are going through the Trial version of Sci Chart and we are specifically interested in 2D Scatter Chart and Simple Scatter Chart 3D.

For 2D Chart we tried to bind up-to 1 Million data points and it worked perfectly and we can zoom in 2D Scatter Chart to view each and every point.

When we tried the same for Simple Scatter Chart 3D, it was competitively slower than 2D Chart.

can we do the same in Simple Scatter Chart 3D?

Currently the whole chart is zooming in. Is there a way so that user can zoom in (XAxis , YAxis ,ZAxis ) individually so that each and every point in the chart can be View-able ?

Thanks,

Hi!

I am trying to use SciChartGroupPane and ChildPanes for my application, and
want to collapse a pane , so that the remaining space is filled with the remaining graphs.

I tried to set the visibility to collapsed but, when i do that the panes only disappear,
but the remaining pane does not resize.

As I see the panes have two small buttons on the upper right corner for collapse and close,
This collapse button is similar to what i would want but I have no idea how to reach the collapse
functionality throgh code. Is it possible to collapse a pane withouth removing it from the container
for the ItemTemplate?

Thanks
Chris

Hi SciCharters,

We have a requirement to show a grid of data as follows:

time (days) on the x-axis
people on the y-axis.

For each “cell” in the grid (i.e. for each day for each person) we want to represent 3 different pieces of data as follows:

some text
1/2 the cell in one colour
the other 1/2 of the cell in a different colour

All cells need to be the same size and it should look a bit like a spreadsheet rather than a chart. I will try and attach a mockup of what it needs to look like shortly.

We are having performance issues using pure Wpf with any amount of data and are wondering if this is a problem scichart can solve for us. It doesn’t look like any of the out of the box charts can give us what we need, so I guess we have to consider using something like a custom chart or annotations?

I’d be grateful for any advice you can give on the best way to approach this task with scichart??

Many thanks

Bill

I would like add checkbox to collapse/hide VerticalSliceModifier, but can’t find properties that do it.
Here is my code:

              <s:VerticalSliceModifier ShowTooltipOn = "MouseOver">
                    <s:VerticalSliceModifier.VerticalLines>
                        <s:VerticalLineAnnotation X1="{Binding VerticalLinePosition}" ShowLabel="True"   Stroke="White"/>
                    </s:VerticalSliceModifier.VerticalLines>
                </s:VerticalSliceModifier>

I have an unfinished project using the trial version on Visblox. I did not buy the licence since the performance was not good enough. Now Visiblox stopped support and so I am migrating to SciCharts. I have some questions though hope you can help.

1. The chart is DateTime,Double type, and there are multiply datapoints on some dates. When editing I need to delete particular points but the Remove method seems to remove all Y values for specific X value. So is it possible to remove a particular X,Y datapoint only from the chart?

2. I need to give each datapoint a name and I was using TextAnnotations on Visiblox (which had a datapoint property). However on SCIcharts the TextAnnotations does not have Datapoint property. How can I do this please?

3. I have 2 charts showing audio waveforms. One showing the full time and one showing a zoomed section. When I hit Play I need the zoomed chart to follow the music waveform. With Visiblox I was using a dispatcher timer and on every tick(20ms) I update the Xaxis range, however the performance was not very good.
   What best method to use for SCI charts please?

Hello,

I want to draw labels for line series using point markers. How to get index of data series for point marker?

public class AnnotatedPointMarker : BasePointMarker
{
   public override void Draw(SciChart.Drawing.Common.IRenderContext2D context, IEnumerable<Point> centers)
   {
       base.Draw(context, centers);
       XyDataSeries<double, double> dataSeries = RenderableSeries.DataSeries as XyDataSeries<double, double>;
       foreach (var center in centers)
       {
           int index =  ???//how to get index of data series? smth like GetIndexByCenter(center)
           double yValue = _dataSeries.YValues[index];

           _textBlock.Text = yValue .ToString();
            _textBlock.MeasureArrange();
           ...
       }
   }
 }

Hello everybody,

I hope you are fine,

I am working with DatapointeselectionModifier on a tablet windows.

I want to be able to select multiple points without pressing Left Ctrl keyboard.
Can you help me please?

Thank you very much.