Unplanned
Last Updated: 01 Jun 2022 08:57 by Kelsey
If you add a View Annotation with an image to the iOS Chart through a custom renderer and the Chart has zoom and pan behavior applied, the annotation displays outside the axes when the Chart is zoomed.
Unplanned
Last Updated: 30 May 2022 10:10 by Mayank
For Chart with ScatterLineSeries, in case the ItemsSource contains points with following sample horizontal values: 0, 2, 4, 6, 8, 6, 4, 2, 0, ZoomBehavior does not work correctly on iOS  - when ZoomMode is set to "Both", the  points are taken in incorrect order and the result is a zig-zag chart.
Unplanned
Last Updated: 12 Apr 2022 09:07 by Davide

X-Axis labels are overlapped when new data points are constantly added. 

on Android, the axis labels are replaced.

There is an inconsistency in the behavior on Android and iOS. 

Workaround: 

apply ChartPanAndZoomBehavior and set 
PanMode to "Horizontal"
ZoomMode to "Horizontal"

And chart Zoom to "2,1"

<telerikChart:RadCartesianChart PaletteName="Light"
                                Zoom="2, 1">
    <telerikChart:RadCartesianChart.BindingContext>
        <local:ViewModel/>
    </telerikChart:RadCartesianChart.BindingContext>
    <telerikChart:RadCartesianChart.HorizontalAxis>
        <telerikChart:DateTimeContinuousAxis LabelFitMode="Rotate"
                                             MajorStepUnit="Day"
                                             PlotMode="OnTicks"
                                             LabelFormat="dd MMM"
                                             MajorStep="20"
                                             ShowLabels="True"/>
    </telerikChart:RadCartesianChart.HorizontalAxis>
    <telerikChart:RadCartesianChart.VerticalAxis>
        <telerikChart:NumericalAxis />
    </telerikChart:RadCartesianChart.VerticalAxis>
    <telerikChart:RadCartesianChart.Series>
        <telerikChart:LineSeries ValueBinding="Value"
                                 CategoryBinding="Date"
                                 DisplayName="Sales"
                                 ItemsSource="{Binding Data}"/>
    </telerikChart:RadCartesianChart.Series>
    <telerikChart:RadCartesianChart.ChartBehaviors>
        <telerikChart:ChartPanAndZoomBehavior ZoomMode="Horizontal" 
                                              PanMode="Horizontal" 
                                              HandleDoubleTap="True"/>
    </telerikChart:RadCartesianChart.ChartBehaviors>
</telerikChart:RadCartesianChart>

Unplanned
Last Updated: 16 Feb 2022 12:28 by Kelsey
While using the trackball feature some axis labels are disappearing. While trackball is activated with tap and hold, dragging down makes the bottom label on the y-axis disappear and dragging left makes the first label on the x-axis disappear.
Unplanned
Last Updated: 17 Dec 2021 12:29 by ADMIN
When the Chart Series' ItemsSource is bound to an ObservableCollection, frequent updates of that collection leads to a Java.Lang.IndexOutOfBoundsException on Android.
Unplanned
Last Updated: 07 Dec 2021 11:09 by ADMIN
Created by: Narsimha
Comments: 0
Category: Chart
Type: Bug Report
0

When rendering null values, there is inconsistency between the platforms. On Android and on iOS gap is displayed, on UWP the lines are connected: 

Android:

UWP:

Unplanned
Last Updated: 23 Nov 2021 11:33 by ADMIN

Bar series disappear when applying zoom and then pan

The behavior can be reproduced in a horizontal bar series

The vertical axis is categorical, and the horizontal axis is numerical

<telerik:RadCartesianChart.ChartBehaviors>
                <telerik:ChartPanAndZoomBehavior PanMode="Vertical"
                                                 ZoomMode="Both" />
            </telerik:RadCartesianChart.ChartBehaviors>
            <telerik:RadCartesianChart.VerticalAxis>
                <telerik:CategoricalAxis />
            </telerik:RadCartesianChart.VerticalAxis>
                <telerik:RadCartesianChart.HorizontalAxis>
                    <telerik:NumericalAxis Minimum="0"
                                       ShowLabels="True"
                                       LabelFormat="N0">
                    </telerik:NumericalAxis>
                </telerik:RadCartesianChart.HorizontalAxis>
                <telerik:RadCartesianChart.Series>
                <telerik:BarSeries CategoryBinding="Category"
                                        ValueBinding="Value" 
                                        ItemsSource="{Binding Data}" />
            </telerik:RadCartesianChart.Series>

Workaround: 
Replace the axis: 
Use categorical axis for the horizontal axis and numerical axis for the vertical axis 

Unplanned
Last Updated: 05 Oct 2021 08:56 by ADMIN
Created by: Ajaysinh
Comments: 2
Category: Chart
Type: Bug Report
1
Hello, 

I am using Telerik RadCartesianChart to display 5 different series. As per requirement, I need to use a secondary vertical Axis for the 5th series. I followed https://www.telerik.com/forums/multi-axes-chart-xamarin-ios to achieve that.  But if I bind data after a delay then it's not working for iOS.

Steps:
1. Bind series data after delay.

For more details please refer attached files.

I look forward to your reply!

Regards,
Ajay Dodiya | Sr. Xamarin Developer
Unplanned
Last Updated: 20 Sep 2021 15:34 by ADMIN
If a tooltip is already displayed in portrait orientation, rotating to landscape causes the tooltip to end up in a very wrong location.
Unplanned
Last Updated: 06 Sep 2021 08:37 by ADMIN
Fill color is not working in AreaSeries when negative values are given on iOS 12.
Unplanned
Last Updated: 02 Jul 2021 08:26 by ADMIN
The Chart loses all the UI customizations made in the iOS platform renderer when the Series are updated, for example, if you show/hide certain Series or updated their ItemsSource.
Unplanned
Last Updated: 14 Jun 2021 04:48 by ADMIN

Annotation (Grid line ) for the DateTimeContinuousAxis is not visualized on iOS. It works as expected on Android.

Add grid line annotation for the datetime axes. the grid lines are not visualized on iOS. 

<telerikChart:RadCartesianChart x:Name="chart">
    <telerikChart:RadCartesianChart.BindingContext>
        <local:ViewModel />
    </telerikChart:RadCartesianChart.BindingContext>
    <telerikChart:RadCartesianChart.HorizontalAxis>
        <telerikChart:DateTimeContinuousAxis LabelFitMode="Rotate" 
                                                x:Name="horizontal"/>
    </telerikChart:RadCartesianChart.HorizontalAxis>
    <telerikChart:RadCartesianChart.VerticalAxis>
        <telerikChart:NumericalAxis />
    </telerikChart:RadCartesianChart.VerticalAxis>
    <telerikChart:RadCartesianChart.Series>            
        <telerikChart:SplineSeries ValueBinding="Value"
                                    CategoryBinding="Date"
                                    ItemsSource="{Binding Data}"
                                    ShowLabels="True"
                                    />
    </telerikChart:RadCartesianChart.Series>
    <telerikChart:RadCartesianChart.Annotations>
        <telerikChart:CartesianGridLineAnnotation Stroke="#0E72F6" 
                                                StrokeThickness="2"
                                                Value="{Binding Threshold}"
                                                Axis="{x:Reference horizontal}">
            <telerikChart:CartesianGridLineAnnotation.DashArray>
                <x:Array Type="{x:Type x:Double}">
                    <x:Double>4.0</x:Double>
                    <x:Double>2.0</x:Double>
                </x:Array>
            </telerikChart:CartesianGridLineAnnotation.DashArray>
        </telerikChart:CartesianGridLineAnnotation>
    </telerikChart:RadCartesianChart.Annotations>
</telerikChart:RadCartesianChart>  


Workaround: 
Use CategoricalAxis.

Unplanned
Last Updated: 06 May 2021 12:57 by ADMIN
When the tooltip is displayed at a certain data point and the data is updated from code-behind, the tooltip stays with wrong data. The expected behavior is the tooltip to be hidden in such case.
Unplanned
Last Updated: 07 Apr 2021 06:37 by Stefan
Applying ChartTrackBallBehavior to a CartesianChart with ScatterLine/ScatterPoint series does not take any effect.
Completed
Last Updated: 24 Feb 2021 13:04 by ADMIN
Release R1 2021 SP1
Completed
Last Updated: 24 Feb 2021 13:03 by ADMIN
Release R1 2021 SP1

An exception is thrown on Android when this code is executed


            this.chart1.VerticalAxis = new NumericalAxis { Minimum = 300, Maximum = 400 };
            this.chart1.VerticalAxis = new NumericalAxis { Minimum = 100, Maximum = 200 };

Unplanned
Last Updated: 19 Feb 2021 18:04 by RAMAKANT
Created by: RAMAKANT
Comments: 6
Category: Chart
Type: Bug Report
1

Hi Team,

If you set the PanOffset in XAML, it is not applied. 

Does not work:

<telerikChart:RadCartesianChart x:Name="MyChart"  Zoom="2, 1"  PanOffset="-400,0" >

I would expect that the RadChartView renderer would be responsible for handling this after the control is loaded and the series/axis is rendered (see workaround).

Workaround

If I subscribe to the ChartView's NativeControlLoaded event and wait approx 100ms before calling PanOffset, it will work.

e.g.

<telerikChart:RadCartesianChart x:Name="MyChart"  Zoom="2, 1" 
                                                     NativeControlLoaded="MyChart_OnNativeControlLoaded">

private async void MyChart_OnNativeControlLoaded(object sender, EventArgs e)
{
    await Task.Delay(100);
    
    MyChart.PanOffset = new Point(-400, 0);
}

Takeaway and Action Requested

The takeaway, and basis of this Bug Report, is that the control should internally perform this delay check and set the PanOffset.

This will enable MVVM scenarios because (I originally wanted to bind the PanOffset value from my view model).

Thank you,

Ramakant

Completed
Last Updated: 20 Jan 2021 11:16 by ADMIN
Release R1 2021
When RadChart is placed inside a ScrollViewer and there is tooltip displayed, scrolling the content with a slide gesture does not hide the tooltip.
Unplanned
Last Updated: 13 Jan 2021 15:12 by ADMIN
In the case of stacked column chart (Chart with BarSeries with Stack CombineMode), and if the data contains negative values, series labels are displayed at the correct position.
Completed
Last Updated: 07 Dec 2020 16:09 by ADMIN
Release 2020.3.1207 (R3 2020 minor release)
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