Progress® Telerik® UI for Xamarin Feedback Portal

Unplanned

Last Updated: 16 Jan 2023 11:53 by ADMIN

Chart: [iOS] ScatterLineSeries becomes zig zag when zoom behavior is applied

Created by: Mayank

Comments: 2

Category: Chart

Type: Bug Report

Chart: [iOS] ScatterLineSeries becomes zig zag when zoom behavior is applied

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: 18 Nov 2022 17:13 by Matthew

Chart: Add Range Bar and Area Series

Created by: Matthew

Comments: 0

Category: Chart

Type: Feature Request

Chart: Add Range Bar and Area Series

Add support for range series. The series are available in the native charts
Android - RangeBarSeries
iOS RangeBar and RangeColumn Series
UWP RangeBar, Range Series.

Please add these series to Chart for Xamarin.Forms.

Duplicated

Last Updated: 06 Oct 2022 05:05 by ADMIN

allow to configure tooltip template for charts

Created by: nirbhay

Comments: 1

Category: Chart

Type: Feature Request

allow to configure tooltip template for charts

Currently there is no way to configure chart tooltip via xaml

Unplanned

Last Updated: 02 Sep 2022 08:17 by paul

Pie Chart: [Xamarin.Android] Exception when changing the visibility of the parent layout where the chart is placed

Created by: paul

Comments: 0

Category: Chart

Type: Bug Report

Pie Chart: [Xamarin.Android] Exception when changing the visibility of the parent layout where the chart is placed

1. Change the view from BarSeries to Pie Series
=> Observe the PieChart loads as expected
2. Change the selection back to "Bar Series"
=> Observe BarSeries continues to operate as expected
3. Change the selection from "Bar Series" to "Pie Series"
=> Observe the following exception

Java.Lang.NullPointerException: 'Attempt to read from field 'double com.telerik.widget.chart.visualization.pieChart.PieUpdateContext.radius' on a null object reference'

Workaround:
Remove the ShowLabels from Pie Series.

Unplanned

Last Updated: 01 Jun 2022 08:57 by Kelsey

Chart: [iOS] TKChartViewAnnotation displays outside of axes while panning or zooming on the chart

Created by: Kelsey

Comments: 0

Category: Chart

Type: Bug Report

Chart: [iOS] TKChartViewAnnotation displays outside of axes while panning or zooming on the chart

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: 12 Apr 2022 09:07 by Davide

Chart: [iOS] X axis labels are overlapped when data points are constantly added

Created by: Davide

Comments: 0

Category: Chart

Type: Bug Report

Chart: [iOS] X axis labels are overlapped when data points are constantly added

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

Chart: [iOS] When trackball is shown and dragged, some axis labels disappear

Created by: Kelsey

Comments: 0

Category: Chart

Type: Bug Report

Chart: [iOS] When trackball is shown and dragged, some axis labels disappear

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: 10 Jan 2022 09:29 by ADMIN

Chart: Cross the horizontal and vertical axis on specific position of the vertical axis

Created by: VPS

Comments: 0

Category: Chart

Type: Feature Request

Chart: Cross the horizontal and vertical axis on specific position of the vertical axis

Currently chart's horizontal axis is at the very bottom of the chart.

When there are negative values in the vertical axis, I want the horizontal axis to cross the vertical axis on 0

Unplanned

Last Updated: 17 Dec 2021 12:29 by ADMIN

Chart: [Android] Java.Lang.IndexOutOfBoundsException is raised when data is frequently refreshed

Created by: Sean

Comments: 0

Category: Chart

Type: Bug Report

Chart: [Android] Java.Lang.IndexOutOfBoundsException is raised when data is frequently refreshed

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

Chart: [UWP] Inconsistency in null values rendering

Created by: Narsimha

Comments: 0

Category: Chart

Type: Bug Report

Chart: [UWP] Inconsistency in null values rendering

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

Chart: [iOS] Horizontal Bar Series disappear when applying zoom and pan

Created by: Simeon

Comments: 0

Category: Chart

Type: Bug Report

Chart: [iOS] Horizontal Bar Series disappear when applying zoom and pan

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

Multi Axes chart with Delay Xamarin iOS

Created by: Ajaysinh

Comments: 2

Category: Chart

Type: Bug Report

Multi Axes chart with Delay Xamarin iOS

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

Chart: [Android] Tooltips remain in wrong location when the device is rotated

Created by: Aaron

Comments: 0

Category: Chart

Type: Bug Report

Chart: [Android] Tooltips remain in wrong location when the device is rotated

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

Chart: [iOS] Fill color is not applied in AreaSeries with negative values

Created by: Sasi

Comments: 0

Category: Chart

Type: Bug Report

Chart: [iOS] Fill color is not applied in AreaSeries with negative values

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

Chart: [iOS] Any customizations made in the custom renderer are reset when Chart series are updated.

Created by: Nicholas

Comments: 1

Category: Chart

Type: Bug Report

Chart: [iOS] Any customizations made in the custom renderer are reset when Chart series are updated.

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

Chart: [iOS] GridLine Annotation for DateTime Axis is not visualized

Created by: Kristen

Comments: 4

Category: Chart

Type: Bug Report

Chart: [iOS] GridLine Annotation for DateTime Axis is not visualized

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: 04 Jun 2021 14:34 by ADMIN

Chart: Provide consistency across platforms when the Chart is panned and the data is updated.

Created by: Kristen

Comments: 0

Category: Chart

Type: Feature Request

Chart: Provide consistency across platforms when the Chart is panned and the data is updated.

Currently on iOS the PanOffset is reset when the underlying data is updated, while the same behavior is not observed on Android.

Unplanned

Last Updated: 06 May 2021 12:57 by ADMIN

Chart: The tooltip is not hidden when the chart data is updated from code-behind

Created by: Kristen

Comments: 0

Category: Chart

Type: Bug Report

Chart: The tooltip is not hidden when the chart data is updated from code-behind

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