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0 votes
29 views

I am trying to integrate custom symbols from AnnotationsAreEasyFragment to MultiPaneStockChartsFragment but the symbols are not visible on price chart of MultiPane… can anyone please help me out with how to give X and Y axis in multipane price chart

0 votes
50 views

I add a LineAnnotation programmaticly to my surface and want to readjust it just like in the Examples Suite via clicking and draging the ends of the annotation.
As long as i dont use a Theme everything works fine. But when applying a custom theme the Manipulation points are not there anymore (and not only visualy, clicking at the end of the line also does not work. Furthermore the mousecursor does not change to a cross when hovering above the annotation end).

This is my Custom theme code:

<ResourceDictionary  x:Class="Reprocess.SciChartDisplay.CustomTheme"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    >       

<!--  *************************  -->
<!--  Colors and Brushes  -->
<!--  *************************  -->

<!--  Chart Brushes  -->
<SolidColorBrush x:Key="TickTextBrush" Color="Black"/>
<SolidColorBrush x:Key="MajorGridLineBrush" Color="LightGray"/>
<SolidColorBrush x:Key="MinorGridLineBrush" Color="LightGray"/>
<SolidColorBrush x:Key="SciChartBackground" Color="White"/>
<SolidColorBrush x:Key="GridBorderBrush" Color="#102A47"/>
<SolidColorBrush x:Key="GridBackgroundBrush" Color="Transparent"/>
<SolidColorBrush x:Key="RolloverLineBrush" Color="#33FD9F25"/>
<SolidColorBrush x:Key="CursorLineBrush" Color="#996495ED"/>
<SolidColorBrush x:Key="RubberBandFillBrush" Color="#33333399"/>
<SolidColorBrush x:Key="RubberBandStrokeBrush" Color="#77999999"/>
<SolidColorBrush x:Key="LegendBackgroundBrush" Color="AliceBlue"/>

<SolidColorBrush x:Key="LabelBackgroundBrush" Color="#AA6495ED"/>
<SolidColorBrush x:Key="LabelBorderBrush" Color="#FF6495ED"/>
<SolidColorBrush x:Key="LabelForegroundBrush" Color="Black"/>

<SolidColorBrush x:Key="TextAnnotationForeground" Color="#EEEEEE"/>
<SolidColorBrush x:Key="TextAnnotationBackground" Color="#AA6495ED"/>

<Color x:Key="AxisBandsFill">White</Color>

<!--  Default Series Colors  -->
<Color x:Key="UpWickColor">Gray</Color>
<Color x:Key="DownWickColor">Gray</Color>
<SolidColorBrush x:Key="UpBodyBrush" Color="Gray"/>
<SolidColorBrush x:Key="DownBodyBrush" Color="Gray"/>

<Color x:Key="UpBandSeriesLineColor">#22117711</Color>
<Color x:Key="DownBandSeriesLineColor">#22111111</Color>
<Color x:Key="UpBandSeriesFillColor">Black</Color>
<Color x:Key="DownBandSeriesFillColor">Red</Color>

<LinearGradientBrush x:Key="MountainAreaBrush" StartPoint="0,0" EndPoint="0,1">
    <GradientStop Color="Gray" Offset="0"/>
    <GradientStop Color="#000710" Offset="1"/>
</LinearGradientBrush>

<Color x:Key="MountainLineColor">Black</Color>
<Color x:Key="LineSeriesColor">Black</Color>
<Color x:Key="ColumnLineColor">#11FFFFFF</Color>
<SolidColorBrush x:Key="ColumnFillBrush" Color="#11FFFFFF"></SolidColorBrush>

<Brush x:Key="OverviewFillBrush">White</Brush>


<Brush x:Key="ScrollbarViewportBackgroundBrush">White</Brush>

<LinearGradientBrush x:Key="DefaultColorMapBrush">
    <GradientStop Offset="0" Color="White"/>
    <GradientStop Offset="0.5" Color="White"/>
    <GradientStop Offset="1" Color="White"/>
</LinearGradientBrush>

Any suggestions?

  • Andre asked 3 weeks ago
  • last active 3 weeks ago
0 votes
384 views

Hi there.

It’s has been asked here:
https://www.scichart.com/questions/question/custom-annotation

So, Is it possible to draw dashed line annotation at the current version 1.2.3.982?

Best regards,
Sushynski Andrei

0 votes
337 views

I am trying to add some annotations to my graph. The problem is that this function is called from a different thread so I get the following excepion:

I thried using an invoke on the main thread but this doesn’t help.

This is the code I use:

 var verticalLineAnnotation = new VerticalLineAnnotation
            {
                X1 = annotation.X,
                Tag = annotation,
                StrokeThickness = annotation.StrokeThickness,
                StrokeDashArray = annotation.StrokeDashArray,
                Stroke = annotation.Brush,
                ToolTip = annotation.LabelTooltip
            };

            var referenceDataAnnotation = annotation as ReferenceDataAnnotation;
            if (referenceDataAnnotation != null)
            {
                verticalLineAnnotation.ContextMenu = ChartContextDataTypesFactory.CreateContextMenus(referenceDataAnnotation.Type.Name, Application.Current.MainWindow);
            }

            if (IsChartFirst)
            {
                verticalLineAnnotation.AnnotationLabels = new ObservableCollection<AnnotationLabel>
                {
                    new AnnotationLabel
                    {
                        LabelPlacement = LabelPlacement.TopLeft,
                        FontSize = 12,
                        FontWeight = FontWeights.Normal,
                        Margin = new Thickness {Bottom = -5},
                        Text = annotation.LabelText
                    }
                };
            }
//This is the line where I get the exception
            ParentSurface.Annotations.Add(verticalLineAnnotation);
  • Kevin Goos asked 8 months ago
  • last active 8 months ago
0 votes
348 views

I am trying to build an application with multiple charts on one screen (3) and each chart annotated with 20-25 annotations.
In total I have 6 FastLineRenderableSeries at once – 2 per chart.
I found serious performance issues after adding more than 10 annotations.

When a user presses a key I go to another set of data. Annotations are created on each data change. I create temporary collection and assign it to the surface annotations collection at once. I also suspend updates through Viewport Manager.

Creation of annotations does not seem to affect the performance, but the rendering of them does.

Most of them are derivatives of AxisMarkerAnnotation and apply a different label template. I tested adding standard Text Annotations instead, just to see whether the custom template had to do something with the performance drop, but it was more or less the same case.
The custom templates are also really simple, it is either a text block or a filled shape, always one component.

Do you have any advises for using a bigger number of annotations?
How to make their rendering faster?

When I remove all annotations the “scrolling” of data goes really smooth.

I am running out of ideas of how to improve.

Best regards,
Paulina

PS Is there any way to try out the other renders before buying a license?

0 votes
384 views

Hi;

If I remember good, in a old version of SciChart it was possible to draw custom annotation in chart with a “pen”, like in Paint.

In the current version is it possible? And if yes, how do it please?

Regards;
Damien

  • Neimad asked 9 months ago
  • last active 9 months ago
0 votes
387 views

Hi,

I’m looking for an annotation that have text and a line or rectangle (like in commix speech balloon) that are anchored to a point on the chart.
Is there such a build in annotation or do I have to build it myself?

0 votes
436 views

Hi all, how i can add annotation on the columns of a chart?

0 votes
383 views

Hi,

I am working on a live graph similar to the sparse impulse series 3D and would like to add live annotations to the plotted data points to display the Y axis value.

Does the SciChart3DSurface support annotations?

If not I would like to instead use the TooltipModifier3D, but would like to force the tooltip to be displayed all the time and reduce the amount of data displayed to a single Y-Axis value. Does this sound reasonable.

Thanks

Marc

0 votes
522 views

I am building a real-time graph with CategoryDate X Axis and Numeric Y Axis. I found it hard to understand the Annotation API’s regarding the X and Y positions.

Q1:
Looking at AnnotationsAreEasyFragment, it draw a Horizontal line of (seemingly) full width. it declares

sciChartBuilder.newHorizontalLineAnnotation()
    .withPosition(7d, 2.8d)
    .withStroke(2, ColorUtil.Orange)
    .build()

i can under Y = 2.8d, but what is the X=7d for? and in the next Horizontal line which is short, it declares .withPosition(5d, 3.2d)?? X=5d and X=7d gives such a big difference.

Q2:
Since i am using CategoryDateAxis, referring to InteractionWithAnnotationsFragment to draw a vertical line at a specific date/time, there is a short line vertical line on 3rd Dec with the code

sciChartBuilder.newVerticalLineAnnotation()
    .withX1(20).withY1(35d).withY2(33d)
    ...

Since its a date axis, i would expect it to accept a Date.class (or long in millis) instead of .withX1(20). It doesnt even make sense! How exactly do i create full height vertical line at a specific date/time?

  • abc def asked 1 year ago
  • last active 12 months ago
0 votes
460 views

I have an application for which the VerticalLineAnnotation is a near perfect fit. However, to make it easier to add these annotations from the AnnotationCreatioinModifier, I would like to derive a new annotation class from VerticalLineAnnotation with a couple of new dependency properties, and new label style using these properties. Is this possible? I’ve looked through the forum and existing examples, and can’t find relevant examples. Can you point me in the right direction?

Bill

1 vote
531 views

Is it possible to disable editing annotations via user drag?

0 votes
538 views

I’m making an app for curve-fitting a line to raw data, and I’d like to have a way for the user to manipulate the curve-fitted line (shown in pink below) in order to fine tune their results.
Screen grab of app

Ideally, after clicking a toolbar button the line would have a callout box around it similar to Microsoft Word’s Shape art. The different markers on the box would allow the user to rotate the line or change the shape.
Word Example

I’m wondering if you have recommendations for built in classes to use or extend? Currently the line I want the user to be able to manipulate is a FastLineRenderableSeries. I understand one can draw vertical and horizontal annotation lines and then manipulate those, but don’t think I can use annotations since I want to be able to manipulate the shape of a data series.

Should I be trying to extend FastLineRenderableSeries to make it behave like an annotation, or extend baseannotation to make it draw as a data series?

Thanks,
Jesma Secord

2 votes
854 views

From your documentation:

4.9 Annotations

SciChart features a rich Annotations API, that allows you to place UIKit UIElements over the chart.
SciChat provides a number of built-in annotations, but you can also create your own.

SCIBoxAnnotation, SCILineAnnotation and SCITextAnnotation are cool, but sometimes it’s not enough.

Is it possible to render UIView on the chart (at least UIImage)?
Is it possible to draw dashed line annotation?
Could you provide an example of creating custom annotation class?

1 vote
834 views

Hello!

Please take a look at the attached screenshot first.

I have a chart configured to draw real-time trading data. X axis type is DateTime. Y axis type is Float. I need to draw vertical expiration time line.

I tried to draw coordinate relative line annotation as follows:

var date: NSDate = NSDate()

let lineAnnotation = SCILineAnnotation()
lineAnnotation.xAxisId = self.axisXId
lineAnnotation.yAxisId = self.axisYId
lineAnnotation.coordMode = .SCIAnnotationCoord_RelativeX
lineAnnotation.style.linePen = SCIPenSolid(color: Style.Chart.ExpirationDateLine.Color, width: Style.Chart.ExpirationDateLine.Width
lineAnnotation.xStart = SCI_constructGenericTypeWithInfo(&date, .DateTime)
lineAnnotation.xEnd = SCI_constructGenericTypeWithInfo(&date, .DateT            

self.chartSurface.annotation = lineAnnotation
self.chartSurface.invalidateElement()

I tried to play with different coordMode values. Line does not appear. Could you help me with this task?

1 vote
635 views

My chart has a black background, and I want to draw a shaded region but setting the alpha fairly low just makes it bleed into the black behind it and look rather ugly. I’d rather use a solid color for that region so it doesn’t blend with the black background, but then it blocks out the grid lines since it’s drawing above them. Is there any way to get annotations to draw below grid lines?

0 votes
1k views

I am working on an application where I have multiple XY data series. For one of the series, we are producing annotation data for some of the points. There are 8 different types of annotations that can be created. Based on the response you gave to a previous question, I am creating the annotations as separate data series instead of as actual annotation objects since there are thousands of them. Performance starts to suffer as the number of annotations increases.

The issue I’m running into now is the number of series is now 14 which is unwieldy for displaying in a legend. My current legend is horizontally oriented as shown in the attached image. I would prefer that the user not have to scroll to view all of the legend items and am trying to figure out how to achieve that.

Is there a way to specify a fixed width for the legend and have items wrap to a new line if there is not enough room for them? I didn’t see that as being an option for the standard legend template.

Also, is there a way to use multiple legends for a chart? Ideally it would be nice to split the series that are associated with annotation data into their own legend instead of mixing them in with the legend for the normal data. The SeriesInfo object doesn’t appear to have any property that would allow me to categorize the data.

Thanks,
Scott

  • sdamge asked 1 year ago
  • last active 1 year ago
0 votes
1k views

I am working on an MVVM application that has a dozen or so view models, each having multiple XY data series that are being displayed in a chart. Now I need to add annotations to the charts for some of the view models. I have some code up and running but am running into a few issues and I wanted to see if you have any suggestions for a way forward.

The first issue relates to performance. Each data series (~100K data points) can have several thousand annotations associated with it. In the app, the view models are all created in memory and the user can change between them by selecting one in a list box (see attached image). Once the number of annotations starts to get into the thousands, I start to notice a delay when switching between data models where one of them contains annotations. If I click a different item in the list box, it takes a few seconds before the selection actually changes and the chart is updated. The delay seems to be more pronounced when switching FROM a view model that has annotations TO one that does not contain them. The delay increases with the number of annotations. I’m not sure if there is anything that can be done about this but thought I would check.

The second issue relates to how the view models are created. Because I am loading data for ALL of the view models into memory, I am trying to create them asynchronously in a background thread as much as possible so the UI remains responsive. That was fine when I was just dealing with the XY data, but it is causing problems for the annotations. If I try to create the CustomAnnotation objects in a background thread I get an error “The calling thread must be STA, because many UI components require this.” Do you have any suggestions for how to create lots of annotations while keeping the UI responsive?

Thanks,
Scott

  • sdamge asked 2 years ago
  • last active 2 years ago
0 votes
850 views

Using MVVM, I have an AnnotationCollection databound to the SciChartSurface.Annotations. Individual LineAnnotations are added to the collection as the application code runs.

If annotations are added while the chart is displayed, they are all drawn correctly.

However, if the chart page is reloaded (say, the user navigates to a different page and then returns to the chart page), the annotations do not always redraw. If the annotations have AnnotationCanvas set to default (AnnotationCanvas.AboveChart, I believe) they redraw correctly about 50% of the time. If the annotations’ AnnotationCanvas is set to AnnotationCanvas.XAxis, they never redraw.

All the annotations still exist in the ObservableCollection in all these cases, so they shouldn’t need to be re-created.

Is this a bug in SciChart or is there something I may be doing wrong with the annotations?
(There is only one X-Axis so no axisID is necessary.)

LineAnnotation lAnno = new LineAnnotation();
lAnno.CoordinateMode = AnnotationCoordinateMode.RelativeY;
lAnno.Y1 = 0.0;
lAnno.X1 = DataPoints;
lAnno.Y2 = 1.0;
lAnno.X2 = DataPoints;
lAnno.YAxisId = "Counts";
lAnno.Foreground = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromRgb(255, 255, 255));
lAnno.Stroke = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromArgb(96, 255, 0, 0));
lAnno.StrokeThickness = 2;
lAnno.AnnotationCanvas = AnnotationCanvas.XAxis;

Markers.Add(lAnno);
0 votes
1k views

I am adding annotations to a chart that is bound to MVVM data and has multiple Y axes. The annotation data all applies to a single series/axis. I have seen that the IsHidden property can be used to toggle the visibility of an annotation. Is there a way to have the annotations tied to the visibility of a series/axis? So if the series is hidden by unchecking its box in the legend, can the associated annotations all be hidden also?

I realize that I can iterate my annotation collection and toggle the property when the series visibility changes, but it would be nice if there were a way for that to happen automatically.

  • sdamge asked 2 years ago
  • last active 2 years ago
1 vote
2k views

Hello,

I am trying to evaluate Scichart for purchase. I am using live data (17 Channels, many samples per second) to draw FastLineRenderableSeries (0-100% on the y axis, time on the x axis). I have everything working satisfactorily using the MVVM pattern. I have tried the HighQualityRenderSurface and Direct3D10RenderSurface.

Are these renderers actually working or am I still using the software renderer?

I need to draw a translucent rectangle on the chart to indicate a “Good” range of values of y values (say 40-50%).

If I use annotations to draw a rectangle, everything slows down and it is unusable. If I use immediate mode drawing and the HighQualityRendererSurface it is kind of OK. If i use immediate mode drawing and the Direct3D10RenderSurface the rectangle and the series lines alternately flash slowly and it is unusable.

How can I draw a rectangle on the screen using live data and get good performance? Do I need the license for this to work well?

Thanks.

1 vote
0 answers
2k views

Hi,

I’m having the same problem as corvex here: https://www.scichart.com/questions/question/problem-with-the-horizontal-line-annotations-on-vertically-stacked-axes, but I wasn’t sure if replying to his topic (which is older) would get the support team’s attention.

I am basically combining the VerticallyStackedAxes example with the SeriesTooltipsExample. The labels for the annotations are drawn in the wrong place below the chart. The main difference is that I am running 3.42.0.6778 (Runtime version v4.0.30319) and he was running an older version.

Attached is an image and my XAML

<Window.DataContext>

</Window.DataContext>

<Window.Resources>
    <Style x:Key="YAxisStyle" TargetType="s:AxisBase">
        <Setter Property="HorizontalAlignment" Value="Right" />
        <Setter Property="AutoRange" Value="Never" />
        <Setter Property="AxisAlignment" Value="Right" />
        <Setter Property="DrawMinorGridLines" Value="False" />
        <Setter Property="DrawMinorTicks" Value="False" />
        <Setter Property="DrawMajorGridLines" Value="True" />
        <Setter Property="DrawMajorBands" Value="False" />
    </Style>
    <ItemsPanelTemplate x:Key="YAxesPanel">
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="*" />
                <RowDefinition Height="10" />
                <RowDefinition Height="*" />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" />
            </Grid.ColumnDefinitions>
        </Grid>
    </ItemsPanelTemplate>
</Window.Resources>

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition />
        <RowDefinition />
        <RowDefinition />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition />
        <ColumnDefinition />
        <ColumnDefinition />
        <ColumnDefinition />
    </Grid.ColumnDefinitions>
    <!--  Create the chart surface  -->
    <s:SciChartSurface x:Name="MassChart" Grid.Column="2" Grid.ColumnSpan="2" Grid.RowSpan="2"
                       s:ThemeManager.Theme="Chrome" LeftAxesPanelTemplate="{StaticResource YAxesPanel}" RightAxesPanelTemplate="{StaticResource YAxesPanel}">
        <!--  Create an X Axis with Growby  -->
        <s:SciChartSurface.XAxis>
            <s:NumericAxis GrowBy="0.1, 0.1" TextFormatting="#" ScientificNotation="None" MaxAutoTicks="30"
                           DrawMinorTicks="False" DrawMinorGridLines="False" AutoRange="Never"
                           VisibleRange="0,29" />
        </s:SciChartSurface.XAxis>

        <!--  Create a Y Axis with Growby. Optional bands give a cool look and feel for minimal performance impact  -->
        <s:SciChartSurface.YAxes>
            <s:NumericAxis x:Name="Precut" AxisTitle="Precut" Id="Precut" Style="{StaticResource YAxisStyle}" GrowBy="0.5, 0.5"
                           DrawMajorBands="True" TextFormatting="#.#" VisibleRange="14,22" Grid.Row="0" />
            <s:NumericAxis x:Name="Postcut" AxisTitle="Postcut" Id="Postcut" Style="{StaticResource YAxisStyle}" GrowBy="0.5, 0.5" 
                           DrawMajorBands="True" TextFormatting="#.#" VisibleRange="9.6,14" Grid.Row="2" />
        </s:SciChartSurface.YAxes>

        <s:SciChartSurface.RenderableSeries>
            <s:FastLineRenderableSeries DataSeries="{Binding WaferPrecutMassSeries}" SeriesColor="Blue" YAxisId="Precut" />
            <s:FastLineRenderableSeries DataSeries="{Binding WaferPostcutMassSeries}" SeriesColor="Blue" YAxisId="Postcut" />
        </s:SciChartSurface.RenderableSeries>
        <s:SciChartSurface.Annotations>
            <s:HorizontalLineAnnotation HorizontalAlignment="Stretch"
                                        FontSize="12"
                                        LabelPlacement="Axis"
                                        LabelTextFormatting="0.0"
                                        ShowLabel="True"
                                        Stroke="#E53333"
                                        StrokeThickness="2"
                                        YAxisId="Postcut"
                                        Y1="{Binding LowThreshold, Mode=OneWay}" />
            <s:HorizontalLineAnnotation HorizontalAlignment="Stretch"
                                        FontSize="12"
                                        LabelPlacement="Axis"
                                        LabelTextFormatting="0.0"
                                        ShowLabel="True"
                                        Stroke="#33C833"
                                        StrokeThickness="2"
                                        YAxisId="Postcut"
                                        Y1="{Binding HighThreshold, Mode=OneWay}" />
        </s:SciChartSurface.Annotations>
    </s:SciChartSurface>
</Grid>

I’m afraid I don’t know why the code boxes are nested in the question, but in any case, I think it gets the point across.

1 vote
2k views

Hello,
I’m using your package for price charting. And I need to put on one bar (or candlestick) several markers (for example several dots with different colours and sizes). Also sometimes I need to change size on some of these markers. Now I am doing this by putting CustomAnnotations. Is there a way to plot the same with for example XyScatterRenderableSeries to increase drawing speed?

Best regards,
Roman.

  • Roman asked 2 years ago
  • last active 2 years ago
1 vote
3k views

Hi.

I need to change CustomAnnotation visual view, when property IsSelected = true.

I tried next code:

<Style x:Key="CustomAnnotationStyle" TargetType="{x:Type sc:CustomAnnotation}">
    <Setter Property="IsEditable" Value="True"/>
    <Style.Triggers>
        <Trigger Property="IsSelected" Value="True">
            <Setter Property="BorderBrush" Value="Orange"/>
            <Setter Property="BorderThickness" Value="2"/>
        </Trigger>
    </Style.Triggers>
</Style>

But it has no effect.
When I select the Annotation by mouse click, then it still have LightGreen rectangle.

In the Goal I need the Orange circle around of the Content of the Annotation.

Thanks.

1 vote
3k views

Hi,

Basically, I want to draw line annotation and add over them the difference in percent between two Y points related to the axis. I tried this code:

    <s:LineArrowAnnotation Stroke="#555" StrokeThickness="2" X1="1.2" X2="2.5" XAxisId="XAxis1" Y1="3.8" Y2="6">
    <s:AnnotationLabel LabelPlacement="Top" LabelStyle="{StaticResource sideLabel}" Text="centered" />
</s:LineArrowAnnotation>

As you did in some of your examples but doesn’t seems to work with LineArrowAnnotation.

Please help me.

Thanks!

0 votes
3k views

I’ve seen lots of questions like that here but still can’t figure out how to work with UserControl in WPF and how can i dinamically arrange annotations on user events (lines, figures,text etc). Can you please provide links which may help to get started from scratch. Thank you!

0 votes
3k views

See the picture how my chart looks. The vertical line was created when pressing the stop button. It is a Fifo chart so the annotation will leave the view at some point in the future.

The code to create the annotation was taken from this sample: https://www.scichart.com/questions/question/add-vertical-line-annotation-programmatically

My real code looks like this:

     private void OnStopChartCommand()
    {
        // create vertical line
        if (_chartSeries.Count > 0)
        {
            IXyDataSeries<double, double> dataSeries = _chartSeries[0].DataSeries as IXyDataSeries<double, double>;
            if (dataSeries != null && dataSeries.XValues.Count > 0)
            {
                double lastValue = dataSeries.XValues.Last();
                AnnotationCollection.Add(CreateVerticalLineAnnotation(lastValue));
            }
        }
    }

    public AnnotationCollection AnnotationCollection
    {
        get { return _annotationCollection; }
        set
        {
            _annotationCollection = value;
            OnPropertyChanged();
        }
    }

    private IAnnotation CreateVerticalLineAnnotation(double xPlacement)
    {
        var annotation = new VerticalLineAnnotation
        {
            VerticalAlignment = VerticalAlignment.Stretch,
            StrokeThickness = 2,
            Stroke = new SolidColorBrush(Colors.Black),
            CoordinateMode = AnnotationCoordinateMode.Absolute,
            IsEditable = true,
            X1 = xPlacement,
            XAxisId = ChartConfigVm.XAxis.AxisId,
            YAxisId = ChartConfigVm.YAxes[0].AxisId
        };

        return annotation;
    }

So far, so good. Everything works fine. But of course when pressing the button new annotations are added and the old ones are not removed.
I would like them removed when they are not visible anymore on this FiFo Chart. But not when pressing the button because I don’t know when that will happen.
Does someone have an idea how to do this once the annotation leaves the chart? This is not timecritical to me but it should happen at some point if possible automatically (or automatically triggered – I can write code to remove it).

  • Uwe Hafner asked 2 years ago
  • last active 2 years ago
1 vote
0 answers
4k views

Hi,

I made a chart with paired vertical axes showing 2 pairs of signals in parallel (see the first screenshot). I used an approach similar to the ‘vertically stacked axes’ example in the demo gallery. Then, I added two horizontal line annotations and assigned them to the different Y-axis via the YAxisId property. The first annotation at the top part is shown properly and can be dragged. The second annotation (with identical properties, save for the YAxisId) is shown in the correct Y position, but its label is missed and the line can not be dragged. Actually, the label is present too, but far below, with the offset equal to the half of the chart (see the second screenshot).

Is it a bug, or I miss some setting that can fix this problem? I use the version 3.1.0.4759.

Thank you in advance!
Ilia

  • corvex asked 2 years ago
  • last active 2 years ago
0 votes
3k views

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?

1 vote
3k views

As usual the basics of SciChart seem to be eluding me and I can’t get the simplest of features to work (hence the reference to it in the title).

All I want is an annotation in the top left of the screen in which I can dynamically change the text from the code behind – but no matter what I do it just wouldn’t do it. I therefore started a test project to see if I could work out what was going on and have recreated the problem only using XAML.

It would seem the annotation will only appear if the XAxis is defined as a “CategoryDateTimeAxis” AND it’s defined within “SciChartSurface.XAxes” tags. Any other combination and it won’t work.

Anyway – if someone could cast their eye over my test code and explain what’s happening I’d be most grateful.

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:s="http://schemas.abtsoftware.co.uk/scichart" x:Class="AnnotationTest.MainWindow"
    Title="MainWindow" Height="350" Width="525">
<Grid>

    <s:SciChartSurface HorizontalAlignment="Stretch" VerticalAlignment="Stretch" s:ThemeManager.Theme="Chrome">

        <!-- Works - Slimmed down from the "Annotations are easy" example 
        <s:SciChartSurface.XAxes>
             <s:CategoryDateTimeAxis AxisAlignment="Bottom" AxisTitle="XAxis 1" Id="XAxis1" TextFormatting="0.0#" AutoRange="Always"/>
        </s:SciChartSurface.XAxes> 
        -->
        <!-- Doesn't Work and this is from the "Interactions with Annotations" example 
        <s:SciChartSurface.XAxis>
            <s:CategoryDateTimeAxis AutoRange="Always"/>
        </s:SciChartSurface.XAxis>   
        -->

        <!-- Doesn't Work - Slimmed down from the "Create Annotations Dynamically" example
        <s:SciChartSurface.XAxis>
            <s:CategoryDateTimeAxis/>
        </s:SciChartSurface.XAxis>
        -->

        <!-- Doesn't Work - How our Axis are currently defined and what I would like to put a text annotation on
        <s:SciChartSurface.XAxis>
            <s:DateTimeAxis AxisTitle="Date" Id="XAxis1" AxisAlignment="Bottom"></s:DateTimeAxis>
        </s:SciChartSurface.XAxis>
        -->

        <s:SciChartSurface.YAxis>
            <s:NumericAxis TextFormatting="0.0#" VisibleRange="0, 10"/>
        </s:SciChartSurface.YAxis>

        <s:SciChartSurface.Annotations>
            <s:TextAnnotation HorizontalAnchorPoint="Center" Text="Anchor Center (X1, Y1)" VerticalAnchorPoint="Bottom" X1="5.0" XAxisId="XAxis1" Y1="8.0"/>
        </s:SciChartSurface.Annotations>

    </s:SciChartSurface>

</Grid>

2 votes
3k views

Hi, in the Dynamically Create Annotations demo, the method on how annotations are created is by (for example a line):

1) First Click on the annotation button
2) Click on the SciChart Surface. This creates the first point of a line
3) Click again on the end point of the line.

Instead of having to do two clicks, is there a way to click and drag instead? eg.

1) First Click on the annotation button
2) Click on the SciChart Surface. This creates the first point of a line
3) drag to the end point of the line.

I just want to mimic Microsoft power point behaviour as our users are more familiar with it.

Thanks

  • Azrin Sani asked 3 years ago
  • last active 3 years ago
0 votes
4k views

Hi,

Was hoping you could point me in the right direction. I’m trying to create horizontal line annotations on demand using MVVM but have become stuck. I’ve have them working in MVVM when the chart loads but not when a button is clicked although I have achieved this using code behind.

I’ve tried using an observable collection of AnnotationCollection type but am struggling to add the horizontal lines annotations to it as they are of a different type.

Any pointers in the right direction would be much appreciated!

Thanks,
Tim

Example of MVVM

TradeAnnotations = CreateHorizontalAnnotations();

private AnnotationCollection _annotations;

    public AnnotationCollection TradeAnnotations
    {
        get { return _annotations; }
        set
        {
            _annotations = value;
            OnPropertyChanged("TradeAnnotations");
        }
    }

    private static AnnotationCollection CreateHorizontalAnnotations()
    {
        //var annotations = new AnnotationCollection();

        var annotations = new AnnotationCollection();

        Color strokeColor = (Color)ColorConverter.ConvertFromString("#008B45");
        Brush strokeBrush = new SolidColorBrush(strokeColor);

        HorizontalLineAnnotation annotation = new HorizontalLineAnnotation();

        annotation.ShowLabel = true;
        annotation.LabelPlacement = LabelPlacement.Axis;
        annotation.HorizontalAlignment = HorizontalAlignment.Stretch;
        annotation.IsEditable = true;
        annotation.SnapsToDevicePixels = true;
        annotation.Stroke = strokeBrush;

        annotation.X1 = DateTime.Now;
        annotation.Y1 = 129;

        annotations.Add(annotation);

        return annotations;          
    }

Example of code behind

        private void CreateHorizontalAnnotations(object sender, System.Windows.RoutedEventArgs e)
    {
        //var annotations = new AnnotationCollection();

        var annotationCollection = new AnnotationCollection();

        Color strokeColor = (Color)ColorConverter.ConvertFromString("#008B45");
        Brush strokeBrush = new SolidColorBrush(strokeColor);

        HorizontalLineAnnotation annotation = new HorizontalLineAnnotation();

        annotation.ShowLabel = true;
        annotation.LabelPlacement = LabelPlacement.Axis;
        annotation.HorizontalAlignment = HorizontalAlignment.Stretch;
        annotation.IsEditable = true;
        annotation.SnapsToDevicePixels = true;
        annotation.Stroke = strokeBrush;

        annotation.X1 = DateTime.Now;
        annotation.Y1 = 129;

        this.priceChart.Annotations.Add(annotation);
    }
0 votes
3k views

Here we use a TextAnnotation as follows

 var textAnnotation = new TextAnnotation
                                 {
                                     Name = seriesAnnotationParameter.Name,
                                     Text = seriesAnnotationParameter.Text,
                                     ToolTip = seriesAnnotationParameter.ToolTip,
                                     XAxisId = XAxisId,
                                     YAxisId = YAxisId,
                                     X1 = seriesAnnotationParameter.X1,
                                     Y1 = seriesAnnotationParameter.Y1,
                                     HorizontalAnchorPoint = HorizontalAnchorPoint.Center,
                                     VerticalAnchorPoint = VerticalAnchorPoint.Center,
                                     TextAlignment = TextAlignment.Center,
                                     Foreground = new SolidColorBrush(Color.FromArgb(0xFF, 0x00, 0x00, 0x00)),
                                     Opacity = 0.5,
                                     BorderThickness = new Thickness(1),
                                     CornerRadius = new CornerRadius(1),
                                     IsEditable = false
                                 };

It works perfectly all-rite when you attach it to the chart the first time as in attached image TextAnnotation_Good.png. However, after zooming in or zooming out, the annotation is resized to undesirable sizes as in attached image TextAnnotation_Bad.png.

How to make TextAnnotation to resize itself based on the size of text inside it ?

This is a very special TextAnnotation centered around a x,y coordinate. There is never X2,Y2 for this use case.

2 votes
3k views

I want to have a BoxAnnotation where Y1 (- double.Infinity) and Y2 (+ double.Infinity). Basically I wanna specify only X1 and X2. And the behaviour must ensure always the box annotations Y1 & Y2 stretch to visible area even when I resize (zoomout) the chart.

In the screen shot its not stretched.

1 vote
4k views

How to create custom annotation which has BoxAnnotation with a VerticalLine Annotation at one end.

At present I’m achieving this by creating both annotations and synchronizing them in ChartModifier.
Look at the attached image where you can see two BoxAnnotations both having a VerticalLineAnnotation at one end. I’m disabling editing for BoxAnnotation and enabling editing only for VerticalLineAnnotation.

When VerticalLineAnnotation is dragged in X-Direction, I get the X1 value from it and manually set it to BoxAnnotations X2.

This is not good implementation. I can see lag between sync events. Is it possible to create a custom annotation which incorporates both Box and Vertical line annotations ? Or is it possible to set IsEditing for BoxAnnotations One End only ?

0 votes
3k views

How to change IsEditable behaviour for a annotation ?

Requirement is to allow Editing (Allow resizing box annotation only on X1 or X2 or Y1 or Y2 side).

It must be possible to specify which sides we can resize. (IsEditable on X1 or X2 or (X1 and X2) all combinations ). Because I’m programmatically creating box annotations.

1 vote
4k views

Hi,

I have multiple dataseries of around 20,000 points each, and the calculation of each point originates from one of three sources. I would like to show, for each point, a different data point marker depending on the origin of the point. Each point marker should also show some meta data about the calculation origin in a tooltip when it is moused over.

I have been able to achieve this effect using the Annotations API, as shown here: http://s4.postimg.org/otgc4yk3x/markers.png but chart performance grinds to a halt with an AnnotationCollection of up to 100,000 annotations attached to the surface.

Can I show this information in another way that will be performant, taking advantage of virtualisation, efficient algorithms on sorted data etc.? I was thinking that I may be able to add the point origins as metadata to the XyDataSeries, benefit from the performance optimisations that come with a SciChart series, and show the metadata in DataPointMarkers with tooltips? Could this work? Can I also have a differently shaped datapoint marker for each point depending on the metadata?

Thanks 🙂

1 vote
4k views

Hi, I’m trying to position vertical line annotations on a chart. I want to position them on a visible part of the chart, but I need to use the Absolute coordinate mode as I want the annotation to move with the data as the chart is panned or zoomed.

My question is then: how can I find the currently visible extents of the X axis? If the chart is zoomed or panned I need to know what the left and rightmost visible X-axis values are (independent of the data).

0 votes
4k views

I want to add annotations programmatically. I need to add line with arrow and textbox at Y1 and X1 of a line. It creates pointed annotation.

1 vote
4k views

I have a chart with multiple dataseries, with each dataseries having annotations on top (like in the Trade Markers example). I have a legend which already shows or hides dataseries using a checkbox, but how can I make this checkbox also show or hide the annotations for that dataseries? Can I hook an event when this checkbox is triggered, or when the dataseries visibility changes?

0 votes
4k views

Hi there,

I created a simple map application. The map itself is displayed as a custom annotation (image) below the chart. The problem is, I can’t zoom into the custom annotation (map). The map will keep it’s original dimensions when zoomed. Is there a way to zoom in/out a custom annotation?

Tim

  • Tim asked 3 years ago
  • last active 3 years ago
0 votes
4k views

I have got a CustomTextAnnotation like in this example CustomTextAnnotation
I added a Rendertransform like this.

<s:TextAnnotation.RenderTransform>
    <RotateTransform Angle="90"/>
</s:TextAnnotation.RenderTransform>

But the AnchorPoint is not used as rotation center.
I thought of using ToCoordinate() but need a calculator for that which is not available within CustomTextAnnotation.

What is best practice to achive the requested rotation in sciChart?

0 votes
4k views

I’m trying to create a few ChartSurface’s which show same elements but with different visible ranges.
If i share DataSeries by binding to SeriesSource this works. But if i try to binding Annotations to a few ChartSurface’s i see annotations only on last chart. If i manually create copy of annotations that everything works but takes a long time.
Is there any way to binding Annotations to a few Charts?

  • l1pton17 asked 3 years ago
  • last active 3 years ago
1 vote
6k views

Hi,

I’m using the following code to create a text annotation:

private void AddLabel(DateTime StartTime, DateTime EndTime, string label)
{
    TextAnnotation text = new TextAnnotation();
    text.YAxisId = "LeftAxis";
    text.HorizontalContentAlignment = System.Windows.HorizontalAlignment.Center;
    text.Text = label;
    text.CoordinateMode = AnnotationCoordinateMode.RelativeY;
    text.X1 = StartTime;
    text.X2 = EndTime;
    text.Y1 = .05;
    text.Y2 = 0;
    text.TextAlignment = TextAlignment.Center;
    text.TextStretch = Stretch.UniformToFill;
    text.Background = new SolidColorBrush(Color.FromArgb(0x80, 0x80, 0x80, 0x80));
    text.BorderBrush = new SolidColorBrush(Color.FromArgb(0xC0, 0xD0, 0xD0, 0xD0));
    text.BorderThickness = new Thickness(2);
    sciChart.Annotations.Add(text);
}

Unfortunately the text doesn’t scale like I want it to though. The size of the text stays the same even when the chart is small, making the height greater than .05. Is there a way to make the text get smaller as the chart is shrunk so that it stays within the .05 Y boundary?

I attached 2 images to illustrate the issue.

Thanks,
Greg

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