Questions

SciChart Android
I only want to draw line chart which update real time. So, I don’t want label and grid. I remove the label and grid via scichart builder options but the chart remain little spacing for label. How to remove these spacing.
Android Version – 7.0
SciChart Version – 2.5.0.2610

My Code –

XAxis = sciChartBuilder.newDateAxis()
                .withDrawLabels(false)
                .withDrawMajorGridLines(false)
                .withDrawMajorBands(false)
                .withDrawMinorGridLines(false)
                .withVisibleRange(current, graphEnd)
                .withAutoRangeMode(AutoRange.Never)
                .build();


    YAxis = sciChartBuilder.newNumericAxis()
            .withDrawLabels(false)
            .withDrawMajorGridLines(false)
            .withDrawMajorBands(false)
            .withDrawMinorGridLines(false)
            .withVisibleRange(-MaxY , MaxY)
            .withAutoRangeMode(AutoRange.Never)
            .build();

    ModifierGroup chartModifiers = sciChartBuilder.newModifierGroup()
            .withZoomPanModifier().withXyDirection(Direction2D.XDirection).withZoomExtentsY(false).build()
            .build();

Hi;

When I open Scichart for the first time, the chart view looks black until it is displayed by drawing the chart.
Is it possible to make the background in a different color until the chart is displayed?

Tnx.

This might be a stupid question. 😀 But I tried several things and nothing seems to work…

I have a chart that has several different datasets that can be switched to. When I apply them and do zoom to extents it changes the Y Axis sometimes 1-15, sometimes 1-20, sometimes 1-25. So the chart zooms in/out, which looks nice.

However I would like to fix the initial zoom to be always be 1-20. If the chart is smaller or bigger than 20; that is fine; I just want the initial viewport to always zoom to be 1-20, when I switch the dataset. They can then zoom in/out or pan using gestures.

Any ideas on what API I need to call to zoom the chart to 1-20. (Please note, this is using a logarithmic scale on the Y-Axis — if it makes any differences).

So what do I need to call/set rather than calling the zoom to extents function.

Hi,

I have a fast column renderable series where a column is added each hour. When the first column is added, it renders approximately half the graph (regardless of zoom), which is unintended. Once the data point for the second hour is added, the column collapses down to the space of the hour (as we would want). Why is the first column rendering too wide? Am I failing to set a parameter that is required?

Below is my series setup:

 val uoColumnSeries =
        generateColumnRenderableSeries(LABEL_ID_UO, uoColumnDataSeries, SolidBrushStyle(uoColumnColor))
    uoColumnSeries.dataPointWidth = .95
    uoRenderableSeries.add(uoColumnSeries)

Attached is how the data renders with 1 point (zoomed in and out), and data render once second point (of height 0) is added. The graph in question is the column graph at the top in yellow.

Thanks,
-Andy

This is stackTrace:
E/Axis: VisibleRange was restored to its last valid value. The range class com.scichart.data.model.DoubleRange (Min = 27748.0, Max = 32248.0) either is not valid or it doesn’t satisfy MinimalZoomConstrain or MaximumZoomConstrain. To provide fallback value please override AxisCore#coerceVisibleRange(IRange) method

Hi
I have a fifo scrolling chart
When I set the axis visibleRangeListener, the chart performance goes down and it gets an exception.
what is the solution?

I want to put a vertical line in the middle of the surface and chart.
this line is fixed .

NativeScript tends to replace fragments rather than destroy the entire activity; so everything lives in a single activity. Unfortunately; when navigating pages the fragment might not be fully detached while the other one is being added (for animation purposes) and it throws this error:

Stacktrace
System.err: Attempt to invoke virtual method ‘void com.scichart.drawing.opengl.ao.a(int, int)’ on a null object reference
System.err:
System.err: StackTrace:
System.err: java.lang.NullPointerException: Attempt to invoke virtual method ‘void com.scichart.drawing.opengl.ao.a(int, int)’ on a null object reference
System.err: at com.scichart.drawing.opengl.aa.doFrame(SourceFile:88)
System.err: at android.view.Choreographer$CallbackRecord.run(Choreographer.java:909)
System.err: at android.view.Choreographer.doCallbacks(Choreographer.java:723)
System.err: at android.view.Choreographer.doFrame(Choreographer.java:655)
System.err: at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
System.err: at android.os.Handler.handleCallback(Handler.java:790)
System.err: at android.os.Handler.dispatchMessage(Handler.java:99)
System.err: at android.os.Looper.loop(Looper.java:164)
System.err: at android.app.ActivityThread.main(ActivityThread.java:6494)
System.err: at java.lang.reflect.Method.invoke(Native Method)
System.err: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

I have tried using suspendUpdates on the surface to stop any updates; and finally went to where I have to manually remove it from the viewport before destruction occurs.

Is their any way to potentially catch this error and ignore it. It only happens during a destruction sequence that the SciChart doesn’t like. Or is their some way to stop all drawing so that it isn’t trying to call whatever is in SourceFile line 88

Also is their a better place to report stack traces for crashes?

I have a chart that does not perform well and has a lag.
what I can do to fix this problem?

I want to set ticks of y Axis, like 0, 10, 20, 30, 40, 50…

I tried in this code,
IAxis yAxis = sciChartBuilder.newNumericAxis().withVisibleRange(0, 50).withVisibleRangeLimit(0, 50).withMajorDelta(10d).build();

It did not work!

How can I change the interval in Axis?

Hi
I want set gridlines ratio to square not rectangle, like this picture.

See the Attached image — On the right side in addition to the labels 0.01% – 20.0%; Their is a color coded chart of AAA through C/D.

I need this to also be part of the chart; or maybe a separate control that can be transformed and zoomed based on where the chart is at.

If I’m zoomed in on the 0.15% – 0.50% then the B/BB/BBB should also be zoomed in to match the current scale of the chart.

Ideas on how to handle this. I’ve tagged this question as Android, but I will also need a solution for iOS.

I want a chart to keep the grid lines constant and fix and grid lines doesn’t attached to chart

When I double-click the screen, the entire data is zoomed out and displayed.
How can I disable this double-click?

I have a real-time chart that already drawn.
Is there a method that scrolls programmatically ?
If there is no such method, how i can do this ?

I want to show my values between (-10,60) but the y axis is adjusting automatically according to data .

I am trying to make a custom Label Provider by extending NumericLabelProvider as it is described here:
https://www.scichart.com/documentation/android/current/webframe.html#Axis%20Labels%20-%20LabelProvider%20API.html

private class PercentLabelProvider : NumericLabelProvider
{
    public override string FormatLabel(Java.Lang.IComparable dataValue)
    {
        return string.Format("{0:P0}", dataValue);
    }
}

However, this is not possible, because FormatLabel can not be overridden.
This is the error message:
“cannot override inherited member ‘FormatterLabelProviderBase.FormatLabel(IComparable)’ because it is not marked virtual, abstract, or override”

DateLabelProvider has the same problem.

I need need to use both.

Is there a solution for this issue?

On Android, the docs say that AnnotationSurfaceEnum should have the “BelowChart” enum case, but it is actually missing in the code. It is there on iOS but not on Android.

I need this particular enum case, because otherwise the annotation boxes are hiding the data series and the grid lines.

What should I do?

Hi, I want to draw a chart like the attached image.

This is a chart with XyDataSeries, it show as vertical line at each data point and verticle line is a dotted line in order to separated from other series.
Since the OHLC chart will have the open, close on the data point and an impulse chart is forced to draw from an axis, is there any better way that can achieve a series like this? Thank you!

Hi,

I’m using RubberBandXyZoomModifier for zooming and i want to reverse the process.
If i double tap to screen, i want the process to be reversed and back to last zooming level.
Firstly how can I dedect the double tap, and secondly how can I reverse the process?

Tnx.

I set a rolloverModifier to a CandlestickSeries, but I can not find a API to hide RolloverMarker,I only find a article about WPF(https://www.scichart.com/documentation/v5.x/webframe.html#RolloverModifier.html)， how could I hide RolloverMarker or change the style of RolloverMarker in Android?

Hello
I want a realtime chart that start rendering from middle of the screen, not from start of the screen

Hello
I want to make a real time chart that its visible range consists of two part.
The first half of the visible range of chart is always blue and the rest is black.

Hello,
I want to use SubDayTextFormatting in android so that when the visible range reaches the same day, e.g. as I zoom, it switches from dd:MMM:yyyy to HH:mm.
How can I do that?

Hello

I was wondering if it would be possible to create a simple clean looking chart like described in the attached image. I am looking for a “SuccessRateChart” that has some similarity to the PieChart but does not use the whole circle to describe its content. I would also need a way to adjust the visible radius of the Pie. In means of information visualization you often hear the term “doughnut chart”…

On way could be to draw some circle stacked over the chart itself, but there should be a better solution.

Would love to hear from you,

Kind regards,
Stephan

我想实现一个功能，需要改变选中区域里面的几根蜡烛颜色为除了涨跌之外的其他颜色，整个功能该怎么实现？

How to use ClipModeX on our desired values instead of ClipAtExtents or ClipAtMin/Max?

Hi,
We want to use scichart for ios-android and wpf platforms to use in our applications developed by our company for Financial (Trading) purposes. In our review, we found that we can use Linear Trendline for wpf platform in your documents. However, there was no documentation for the android and ios platforms. Since Linear Trendline is of great importance for trading, it is important to know whether this feature is available or if it will be developed as a new feature by you. I would ask you to provide information on the subject.

I want to maintain shape of scichart minor and major grids as square as shown in image below how can I do that?

Hello,

Let me first describe the issue we have and why I think a possible solution would be to catch the double tap event.

Our chart consists of 6 series. We have an X axis that shows timestamps and 5 Y axis’ for different data like pressure value, temperature, etc. which are of type double. Additionally under the chart we have a legend that displays these 5 Y axis series (one series per one Y axis) with ability to change the visibility of the series and axis.

The problem occurred when as an example, temperature values throughout are constant, e.g. 24.5. The line gets drawn and it is a stable line. Axis is also displayed. However, when a user does the double tap gesture on the chart surface, which usually resets the zoom extents, the axis that has static/non-changing values does some sort of re-initialize animation and after several of double tab gestures only axis label remains (minor and major ticks disappear).

If I could catch the double tap gesture event and override it I could for example say that if the data is static don’t do anything. However, I don’t know where this event is and how to override it.

Any help would be much appreciated.

Thank you.
Regards,
Paul.

Hi,
I am using scichart android I want Pinch zoom Modifier to Zoom equally on both X and Y Axis at the same time so that shape of grids always remain square as shown in image below .. How can I do that?