Questions

I’m trying to add custom layout to the tooltip modifier ,but i couldn’t find the solution , also i would like to change the crosshair type behavior on the tool tip ,instead of that i would like to add my own style

Hi,

I am trying to add text annotation on the chart but it doesn’t show. I’m wondering what went wrong with my code.

TextAnnotation textAnnotation = sciChartBuilder.newTextAnnotation()
                .withText("hello")
                .withX1(450)
                .withY1(1)
                .withFontStyle(20, Color.WHITE)
                .build();
        ecgSurface.getAnnotations().add(textAnnotation);

I try to make a text formatting for my chart on IOS and Android, regarding your documentation:

IOS:
https://www.scichart.com/documentation/ios/current/axis-labels—textformatting-and-cursortextformatting.html
yAxis.textFormatting = “$0.0”

Android:
https://www.scichart.com/documentation/android/current/Axis%20Labels%20-%20TextFormatting%20and%20CursorTextFormatting.html
yAxis.setTextFormatting(“$0.0000”);

I checked my code and its the same like yours. On Android i have:

// yAxis filed with type IAxis
private IAxis yAxis;

// create
yAxis = sciChartBuilder
.newNumericAxis()
.withGrowBy(0.01d, 0.1d)
.withDrawLabels(true)
.withDrawMajorGridLines(true)
.withDrawMinorGridLines(false)
.withDrawMajorBands(false)
.withDrawMajorTicks(false)
.build();

// the set textFormatting:
yAxis.setTextFormatting(“$0.0000”);

On IOS i have:

var yAxis: SCINumericAxis?
self.yAxis = SCINumericAxis()
self.yAxis?.textFormatting = “$0.0”

But it is not working, can you tell me please why? What I’m doing wrong?

Hi,

I’d like to learn how to cancel creating annotation in the OnAnnotationCreatedListener(). Thanks.

annotationCreationModifier.setAnnotationCreationListener(new OnAnnotationCreatedListener() {
        @Override
        public void onAnnotationCreated(IAnnotation iAnnotation) {
            if (outofbound) {
                 // remove current annotation
            }
         }

Hi,

I want to change the colormap so that the:
– minimum (blue) = 4095
– maximum (red) = 800

Also, I want to set 0 to either black or transparent.

I can easily change the min and max values, just wanting to change the color limit and set 0 = black.

Here is my code for creating the heatmap:

public void heatmap(){
    // Create a SciChartSurface
    SciChartSurface surface = new SciChartSurface(this);
    // Get a layout declared in "activity_main.xml" by id
    LinearLayout chartLayout = findViewById(R.id.chart_layout);
    // Add the SciChartSurface to the layout
    chartLayout.addView(surface);
    // Initialize the SciChartBuilder
    SciChartBuilder.init(this);
    // Obtain the SciChartBuilder instance
    final SciChartBuilder sciChartBuilder = SciChartBuilder.instance();
    final NumericAxis xAxis = sciChartBuilder.newNumericAxis()
            .withGrowBy(0.1, 0.1)
            .build();
    final NumericAxis yAxis = sciChartBuilder.newNumericAxis()
            .withGrowBy(0.1, 0.1)
            .build();
    final FastUniformHeatmapRenderableSeries heatmapRenderableSeries = sciChartBuilder.newUniformHeatmap()
            .withMinimum(4095)
            .withMaximum(800)
            .withCellTextStyle(sciChartBuilder.newFont().withTextSize(8).withTextColor(ColorUtil.White).build())
            .withDrawTextInCell(true)
            .withDataSeries(createDataSeries())
            .build();
    final SciChartSurface chart = surface;
    Collections.addAll(chart.getXAxes(), xAxis);
    Collections.addAll(chart.getYAxes(), yAxis);
    Collections.addAll(chart.getRenderableSeries(), heatmapRenderableSeries);
    Collections.addAll(chart.getChartModifiers(), sciChartBuilder.newModifierGroupWithDefaultModifiers().build());
}

So far what I know about Scichart is only their given examples, They are really great, what worries me now before I apply for any realtime cryptocurrency data API, I would like to know how to integrate the API to my chart so that I get real time data. If there is any example code with API recommendations I would really appreciate.

From your examples on Github all of them requires databinding which is giving me serious problems. I am running into databinding errors, would you happen to have solutions to that?

We want to create loop graph in android wrap data

Hello there. At the beginning of the program, I define the workspace as w=10 and h=10 units. I set the new workspace to 5×5 in a button event. The new workspace is created but the old 10×10 volume remains on the screen. When I create the new workspace I want the old one to disappear. Thank you in advance for your help. Good work.

My button event.

btnSetNewWH.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
w = 5;
h = 5;
ds3d = new UniformGridDataSeries3D<>(Double.class, Double.class, Double.class, w, h);      

rs1 = sciChart3DBuilder.newSurfaceMeshSeries3D()
        .withDataSeries(ds3d)               
        .withDrawMeshAs(DrawMeshAs.SolidWireframe)
        .withStroke(0xFFE0E0E0)
        .withStrokeThicknes(1f)
        .withMaximum(5000)
        .withDrawSkirt(false)
        .withMeshColorPalette(new GradientColorPalette(colors, stops))
        .withOpacity(1.0f)
        .build();

surface3d.setTheme(R.style.SciChart_ElectricStyle);
surface3d.setCamera(camera);
surface3d.setXAxis(xAxis);
surface3d.setYAxis(yAxis);
surface3d.setIsFpsCounterVisible(false);
surface3d.setZAxis(zAxis);
surface3d.getRenderableSeries().add(rs1);
surface3d.getChartModifiers().add(sciChart3DBuilder.newModifierGroupWithDefaultModifiers().build());
    }
});

i have been working on line charts and i need to show date as well as time on the axis( 21 june 08 05:30:PM like this).I’ve tried with date axis and numeric axis ,but it doesn’t helps.Do we have any suggestions or samples which could help me

Hi,

I have a valid license key for development. But occasionally the charts show the message below and I have to restart the app to avoid that. May I ask is there a reason for that and how to fix it?

"Sorry! You have not set a License Key. You can request a free trial key from www.scichart.com/licensing-scichart-android or purchase at store.scichart.com."

Thanks,
Gang

I’m trying to implement sciChart to flutter app (Android). It gets pretty confusing when trying to make it work. Anyone have examples how to make SciChart to work on Flutter? Adding the license works just fine. Only need for ECG chart for now. Thanks.

I have a line chart and need to implement textAlign: left property for tickLabel on yAxis. I have found some way to do it on the forum, but it does not work in my case:
xAxis.setAxisTickLabelStyle(new AxisTickLabelStyle(Gravity.CENTER, Layout.Alignment.ALIGN_CENTER, 5, 0, 5, 0));
I get the error:
Alignment cannot be converted to int
But according documentation https://www.scichart.com/documentation/android/current/SciChart.Charting~com.scichart.charting.visuals.axes.AxisTickLabelStyle~_ctor.html AxisTickLabelStyle class get 5 int arguments. Can you help me please how to solve it!

i recently saw documentation about compositeannotation in wpf

do you have same version for android?
how to combine all annotation as one annotation?

My chart is dynamic, adding data from the right side all the time, and scrolling the chart to the left. Now the chart can manually scroll to the right indefinitely, but there are many blank areas on the right side. What can I do to limit the range of scrolling to the right? Is there any way to limit the zoom ratio to prohibit the chart from scrolling to the right indefinitely?

Hi, I just want to make sure

everything inside com.scichart.charting.visual will be considered as VIEW in MVVM pattern right?

thanks

In Scichart Android version 4.2.0.4557, ICategoryLabelProvider.transformDataToIndex(Date var1); accept date as parameter

but at version 4.2.0.4608, int transformDataToIndex(double var1); it accept double?

then how to convert date to double?

and another question.

1. how set start tick axis in category date axis?
   what i see here first tick of x axis always come with data, not like date axis which data can adapt their position itself.

2. how to set time frame in date axis like category date axis?

3. without scichart builder i cannot set time frame in categorydateaxis

I’m evaluating chart libraries to my next project and I’m trying to do a simple chart like the one in the attached image.
It was actually very easy to do it using MPAndroidChart, however it’s been hard to do a simple task like put a label aligned with the column… I did take a look into the SciChart sample application, but the application just uses numeric labels…
Can someone provide some guidance of how to do this?

Hello,

I am having some difficulties using a custom DateTickProvider.

I am trying to offset the values to “anchor” the chart to specific local time (see original question at “https://www.scichart.com/questions/android/axis-value-anchor” for details)

class CustomDateTickProvider() : DateTickProvider() {
    override fun updateTicks(minorTicks: DoubleValues, majorTicks: DoubleValues) {
        // super appears to sometimes recalc based on GMT, and sometimes provide offsets from my previous offsets.
        super.updateTicks(minorTicks, majorTicks) 

       // My offset code here, assumes tick values are GMT based...
    }
}

My code usually works, but sometimes it doesn’t. It appears that when I call super.UpdateTicks(..), it usually generates new ticks based on GMT, but sometimes it simply provides a small offset (like when I pan) based on existing tick values. Is that correct?

Is there a way for me to Force updateTicks to always recalculate based on GMT, or a way for me to tell if updateTicks is recalculating based off GMT or just doing offsets on the existing tick marks?

Or should I be going at this in a different direction?

Thank you.

Hi,
Im tried to convert date into xAxis using this tutorial

https://www.scichart.com/documentation/android/current/webframe.html#Axis%20APIs%20-%20Convert%20Pixel%20to%20Data%20Coordinates.html

but i got this error

Java.lang.RuntimeException: Unable to start activity ComponentInfo{}: java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object com.scichart.data.numerics.math.IMath.fromDouble(double)' on a null object reference

here my code

https://gist.github.com/ngiyus/4590c009261a28dba2c8b10e123a97f3

Hi,

I want to draw the shape of the waveform that stretches out from one point.
I tested it using ‘CreateEllipsoidMesh3DChartFragment’ from example source, but I found problem.

I initialized the displacement value to 0, and entered the displacement value of the point I wanted.
In the image I uploaded, the coordinates are symmetrical, but the shape is different.

Is there a rule that connects coordinates when you draw a triangle?
Is there any way I can control this?

I have attached the image and code.

best regards, Thank you

Hi,
Im tried to convert date into xAxis using this tutorial

https://www.scichart.com/documentation/android/current/webframe.html#Axis%20APIs%20-%20Convert%20Pixel%20to%20Data%20Coordinates.html

but i got this error

Java.lang.RuntimeException: Unable to start activity ComponentInfo{}: java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object com.scichart.data.numerics.math.IMath.fromDouble(double)' on a null object reference

when loading first data everything goes fine
growby max padding as expected (Image1)

but i added realtime data and data grow, it show strange behaviour, padding more than i expected. (image2)

final IAxis xAxis = sciChartBuilder.newCategoryDateAxis().withVisibleRange(xVisibleRange).withGrowBy(0.1,0.1).build();

ZoomPanModifier zoomPanModifier = new ZoomPanModifier();
zoomPanModifier.setClipModeX(ClipMode.ClipAtExtents);
zoomPanModifier.setClipModeTargetX(ClipModeTarget.MaximumRange);

any workaround? thanks

Hi,
How can I programmatically prevent panning, zooming, yaw, pitch movements on the screen whenever I want?

Best regards…

Hello!

I want to draw an irregular polyhedron in 3D chart. And I know the coordinates for each vertex.
However, I couldn’t find the appropriate API.
please, need a API or a guide to help me…

best regards, Thank you

Hello to everyone.

Is it possible to draw the 2d heatmap chart output that appears in pixel shape smoothly? Is there any way to solve this with the current library?

Hello there. I am very novice compared to you. As soon as I press a button in the main activty, what should I do to see the data set that I have determined before on the screen?

Thank you from now.

MainActivity code part:

        btn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            mdata = new double[][]{
                    {3, 2, -1.97, -2.81, -0.33, 1.53, 2.04, 2-.08, -1.94, -1.42, -1.58},
                    {-1.77, -1.76, 1.1, 0.26, -0.72, -0.64, -3.26, -3.2, -3.1, -1.94, -1.54},
                    {0, 0, 0, 0, 0, -3.7, -3.7, -3.7, -3.7, 0.48, 0.48},
                    {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
            };

            final Camera3D camera = sciChart3DBuilder.newCamera3D().withPosition(-1300, 1300, -1300).build();

            final NumericAxis3D xAxis = sciChart3DBuilder.newNumericAxis3D().withMaxAutoTicks(7).build();
            final NumericAxis3D yAxis = sciChart3DBuilder.newNumericAxis3D().withVisibleRange(-4d, 4d).build();
            final NumericAxis3D zAxis = sciChart3DBuilder.newNumericAxis3D().build();
            final int xSize = 11;
            final int zSize = 4;

            final UniformGridDataSeries3D<Double, Double, Double> ds = new UniformGridDataSeries3D<>(Double.class, Double.class, Double.class, xSize, zSize);
            ds.setStartX(0d);
            ds.setStepX(0.09);
            ds.setStartZ(0d);
            ds.setStepZ(0.75);

            for (int z = 0; z < zSize; z++) {
                for (int x = 0; x < xSize; x++) {
                    ds.updateYAt(x, z, mdata[z][x]);
                }
            }
        }
    });

Hello!
I’m trying to migrate OhlcDataSeries from Double to more accurate BigDecimal on Android.
But I faced with an issue that “GenericClass doesn’t support class”

How can I fix it?
I want to use BigDecimal with chart.

Thank you

Referring to the stacked column side by side example in the android examples collection, if someone clicks on a column/series in that chart, how could i identify which the of columns has been selected (usa, china, india, etc).

I’ve attached example code where setting “majorTickLineLength” appears to have no effect on the length of the major tick lines. I’m trying to make them shorter than the default (half the length). How can I adjust the length of these tick lines?

I am extending a PieSegmentLabelFormatterBase to format the segment label of a piechart. however I cannot find any information regarding how I can change its size. So my question is How can I change the font size of piechart labels?

using android scichart with two surfaces vertically on the screen, that is one above the other, same width. I wish to match the width of the X axis on both. when the labels of the Y axis are formatted differently the X axis may change overall width. I suppose there could be two approaches,
1) fix or match the width of the X axis
2) fix or match the width of the Y axis labels

which is the simplest? and where can I learn more?

Hello,

I am wanting to “force” an axis label on a specific value. For example, right now in my datetime graph it always shows a “5PM” time on the axis regardless of the data. Instead, I would like to “anchor” the axis ticks on a different time value, like local Noon. We were able to do this in our previous charting solution, but I have not yet figured out how to do it with SciChart.

Thank you.

Hi,

I’d like to enable AnnotationCreationListener with a toggle button pressed down, and disable it with the button released. It’s different from the Android sample code in Create Annotation Dynamically. I have a few questions when I’m trying to code. I’m not sure if my approach is on the right track. Please advise, thanks.

// insert button listener
    insertAnnotationButton = findViewById(R.id.annotationInsertButton);
    insertAnnotationButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            // TODO: add chartmodifier/annotationCreationModifier when button pressed down
            if (insertAnnotationButton.isChecked()) {
                annotationCreationModifier.setAnnotationType(???); // how to set type to vertical line annotation?
                DefaultAnnotationFactory annotationFactory = new DefaultAnnotationFactory();
                annotationFactory.setFactoryForAnnotationType(DefaultAnnotationFactory.VERTICAL_LINE_ANNOTATION, new IAnnotationFactory() {
                    @NonNull
                    @Override
                    public IAnnotation createAnnotation(@NonNull ISciChartSurface parentSurface, int annotationType) {
                        return sciChartBuilder.newVerticalLineAnnotation().withIsEditable(true).withStroke(1, White).withVerticalGravity(Gravity.FILL_VERTICAL).build();
                    }
                });
                annotationCreationModifier.setAnnotationFactory(annotationFactory);
                annotationCreationModifier.setAnnotationCreationListener(new OnAnnotationCreatedListener() {
                    @Override
                    public void onAnnotationCreated(IAnnotation iAnnotation) {
                        // how to get X coordinate of the annotation and update my annotation variable

                    }
                });
                ecmSurface.getChartModifiers().add(sciChartBuilder.newModifierGroup().withModifier(annotationCreationModifier)..build());
            } else {
                // how to remove annotationCreationModifier from ChartModifiers?
                ecmSurface.getChartModifiers().remove(???);
            }
        }
    });

Hello,

I’m trying to figure out how to apply a consistent gradient to the areas underneath my line charts. For example, if I have chart with Y values 0-10, I might want the area corresponding to 0 to be white, and 10 to be black, regardless of what values are currently panned or zoomed onto the screen. From what I have seen so far, SciChart gradients are based on the current screen values, so if I were zoomed into an area that was only 0-5, it would should a white to black gradient (not what I want), whereas I need a white to grey variant (reserving the black for 10’s). I hope that makes sense.

Thank you.