Tag: Axis

I am showing tooltip with CursorModifier. My tooltip bigger than SciChartSurface and I am using ClipModifierSurface=”False” in order to show whole tooltip. But in this case axis labels and scroll bar are on top of tooltip.
Described problem can be seen on Featured Apps > Scientific Charts > Oscilloscope Demo.
Is there any way to bring tooltip on top of chart surface?

Thanks
Samvel

I have a few problems that I’m trying to address with y-axis labelling.

1. I am including a y-axis on the left side of my graph but want the text of the labels to be right-aligned. Each label uses two lines of text. How can I do that?
2. I want the margin of the text to be a specific width so that I can line up the y-axis of multiple scichart surfaces that are stacked vertically. How can I set each of my scichart surfaces to use a particular margin for the y-axis labelling?
3. The y-axis label text will wrap when I don’t want it to (see attached image — The text of the label should be “1m \n Left” and I am currently seeing “1m \n Lef \n t”). How do I turn off the wrapping of text on the y-axis?

———-

This is how I am currently implementing the y-axis:

NumericAxis(context).apply {
    drawLabels = true
    axisAlignment = AxisAlignment.Left
    this.labelProvider = labelProvider
    this.tickProvider = tickProvider
    drawMajorBands = false
    drawMajorTicks = false
    drawMinorTicks = false
    drawMajorGridLines = false
    drawMinorGridLines = false
    isLabelCullingEnabled = false
    visibleRange = DoubleRange(
            dataRange.first,
            dataRange.second
    )
    autoRange = AutoRange.Never
    tickLabelStyle = FontStyle(
            TypefaceManager.obtainTypeface(context, CustomTypeface.PROXIMA_NOVA_REG),
            context.resources.getDimension(R.dimen.results_screen_graph_labels_text_size),
            Color.LTGRAY
    )
}

take the SciChart Trader as an example, x-Axis is type of CategoryDateTimeAxis. I want a way to show the index of the time in the collection, when mouse moves over the price bar in some mode like Rollover or Cursor.

regards
chunxi

Hi, I want to color the axis label by its value,
eg. value< 0 -> show with red color
value = 0 -> show grey color
value > 0 -> show green color

similar to this question, but in android platform, it seems the LabelProvider has function related to the value(string) formatting only. Is there any ways to styling the label? Thanks!

Hello,

I have the problem, that sometimes only one label is shown on the X-Axis even when there is space to show some more, than only one.
The property “IsLabelCullingEnabled” would show them all, but than it is ugly if there is not enough space.
So what can I do to have some more Labels shown?

In the Screenshots you can see that with only a few pixels more, more labels are shown, but the could have been also shown with less pixels (Especially Label “1” and “22” could have been shown).

Hi !

Does the android version of SciChart feature logartihmic axis scaling ?

Hi there,

I’m trying to display little icons as axis labels using the LabelProvider API and NSAttributedString (with NSTextAttachmet). Is this supported? Here’s a minimal example:

import UIKit
import Foundation
import SciChart
import SciChart.Protected.SCILabelProviderBase

class ViewController: UIViewController {

    private lazy var chart: SCIChartSurface = {
        let c = SCIChartSurface(frame: .zero)
        c.xAxes.add(items: SCINumericAxis())

        let yAxis = SCINumericAxis()
        yAxis.labelProvider = SymbolLabelProvider()
        c.yAxes.add(items: yAxis)
        return c
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        SCIChartSurface.setRuntimeLicenseKey(myLicenseKey)

        view.addSubview(chart)
        chart.translatesAutoresizingMaskIntoConstraints = false
        let guide = self.view.safeAreaLayoutGuide
        NSLayoutConstraint.activate([
            chart.leadingAnchor.constraint(equalTo: guide.leadingAnchor),
            chart.trailingAnchor.constraint(equalTo: guide.trailingAnchor),
            chart.topAnchor.constraint(equalTo: guide.topAnchor),
            chart.bottomAnchor.constraint(equalTo: guide.bottomAnchor),
        ])
    }
}

class SymbolLabelProvider: SCILabelProviderBase<SCINumericAxis> {

    lazy var numberFormatter: NumberFormatter = {
        let f = NumberFormatter()
        f.allowsFloats = true
        f.maximumFractionDigits = 2
        return f
    }()

    init() {
        super.init(axisType: ISCINumericAxis.self)
    }

    override func formatLabel(_ dataValue: ISCIComparable!) -> ISCIString! {

        let intValue = Int(dataValue.toDouble())
        let font = UIFont.init(descriptor: axis.tickLabelStyle.fontDescriptor, size: UIFont.systemFontSize * 4)

        if intValue.isMultiple(of: 2) {
            let i = UIImage(systemName: "circle", withConfiguration: UIImage.SymbolConfiguration(font: font))
            return NSAttributedString(attachment: NSTextAttachment(image: i!))
        } else {
            let attributes: [NSAttributedString.Key: Any] = [
                .font: font,
                .foregroundColor: UIColor.yellow,
            ]
            return NSAttributedString(string: numberFormatter.string(for: dataValue.toDouble())!, attributes: attributes)
        }
    }
}

See attached screenshot for the result.

If this is not supported: any suggestions / ideas for a workaround?

Thanks
—Matthias

Hi, I want to make the YAxis show only certain label (max, min, or others) only like the attached image. I want to ask if it is possible to show axis value unevenly. Thanks!

Hello!

I am trying to render a HeatMap and align labels next to squares (see the attached image). However, I am running into two issues.

Firstly, I am using RenderTransform to shift labels so that they are aligned with the squares instead of being on the borders between them. It works, but does not look good as I resize the control.

Second, the axes render the last label outside the view. I tried setting VisualRange and VisualRangeLimit but it did not help. It hides the last data column (or row) and still displays the last label.

Any suggestions on how I can solve it?

I am attaching a sample project.

Thank you in advance!

Hi,

Can Axis show the value of 10-15 level data? Is there any limitation for the numeric axis?

Hello,

I am trying to set the interval on the x-axis in a polar plot but it doesn’t appear to be accepting it and plotting accordingly. My axis definition is quite simple:

<s:SciChartSurface.XAxis>
       <s:PolarXAxis Name="TFxAxis" MajorDelta="15"/>
</s:SciChartSurface.XAxis>

I am plotting angles and radii so one data point might be (45, 1) and the next (50, 2) and so on where my visible range is TFxAxis.VisibleRange = new DoubleRange(-180.0, 180.0). Very simple plot but it keeps returning to a default of 1 on my MajorDelta for the x-axis and then showing major axes at 50 degree intervals. I’ve tried a variety of solutions but nothing seems to work properly.
Thanks,
Christina

I want to paint my time axis like this:

Or just highlight last week, day, hour.
Is there way to apply style only on part of axis?

I’m trying to change the AutoRange property of my axis in a VisualStateManager storyboard and it’s throwing an exception saying the value is invalid. Is this not possible or should the object/property be accessed differently?

Exception: “The animation(s) applied to the ‘AutoRange’ property calculate a current value of ‘AutoRange.Once’, which is not a valid value for the property.”

<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="AutoRange" Storyboard.TargetName="XAxis">
<DiscreteObjectKeyFrame KeyTime="0" Value="AutoRange.Once"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
.
.
.
<sc:NumericAxis x:Name="XAxis" AxisTitle="Time (s)" TitleFontSize="14" AutoRange="Always"/>

Thanks!

Hi, i’m developing an app in WPF and i found that it crashes when i’m dereferencing the user control where my chart lives in and have 1 or more points selected by code in one chart when the other one is not visible.

i would be very apreciated if someone could tell me a hint of where i have to look for the solution or what do this methods do or touch.

more data about the chart:

• I have 2 fastlinerenderable series each with 2 Yaxis for itselves and 2 shared XAxis.
• I also have a modified listbox which is have it’s sincronization synced to the chart.
• have a modifiergroup to pan,zoom and select.

this is my Selectionmodifier:

<scicharts:DataPointSelectionModifier
                        Name="ChartSelection"
                        SelectionFill="#B1B5B2B2" 
                        XAxisId="{Binding XAxisType, NotifyOnTargetUpdated=True}"
                        TargetUpdated="ChartSelection_TargetUpdated"
                        SelectionStroke="#009E9C9C"
                        IsEnabled="{Binding SelectionMode}" >

I think that this is the axis that breaks my program but it needs it to not crash when i select.

this is my stacktrace:

An unhandled exception of type ‘System.NullReferenceException’ occurred in SciChart.Charting.dll

en SciChart.Charting.ChartModifiers.DataPointSelectionModifier.DeselectAllPointMarkers()
en SciChart.Charting.ChartModifiers.DataPointSelectionModifier.OnXAxisIdDependencyPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

I tried to make a program that could replicate the error but i couldn’t.

thanks in advance.

Hi

I’m using auto range on a numeric axis. The data can be anything, but I want the axis to never have a range of less than 5.
E.g.: -100 to -95
E.g.: 17 to 22
E.g.: 0 to 5
etc.

What do I need to set to be able to do this? I have tried MinimalZoomConstrain and VisibleRangeLimit without success. Preferably something to set in XAML on my axis.

Thanks.

I am considering applying server-side licensing for my javerScript application.

In the document below, there is a phrase “Our server-side licensing component is written in C++.”
(https://support-dev.scichart.com/index.php?/Knowledgebase/Article/View/17256/42/)

However, there is only asp.net sample code on the provided github.
(https://github.com/ABTSoftware/SciChart.JS.Examples/tree/master/Sandbox/demo-dotnet-server-licensing)

I wonder if there is a sample code implemented in C++ for server-side licensing.

Can you provide c++ sample code?
Also, are there any examples to run on Ubuntu?