Progress® Telerik® UI for Xamarin Feedback Portal

Unplanned

Last Updated: 11 Oct 2023 10:30 by Davide

Chart: [Android] Cannot load LineSeries with 11500 points

Created by: Davide

Comments: 0

Category: Chart

Type: Bug Report

Chart: [Android] Cannot load LineSeries with 11500 points

I am trying to show two LineSeries with 11500 points in each and the chart cannot load at all. The wait time seems to be infinite. I noticed that the chart loads in about 5 seconds when there 5 thousand points, and in about 10 seconds when there are 10 thousand points.

Unplanned

Last Updated: 30 Aug 2023 08:32 by Davide

Chart: [iOS] Series cannot be scrolled when data is added dynamically and chart is zoomed

Created by: Davide

Comments: 0

Category: Chart

Type: Bug Report

Chart: [iOS] Series cannot be scrolled when data is added dynamically and chart is zoomed

When you zoom in on the graph, it always zooms to the center of the dataset. Even if I try to move, manually, horizontally the graph I lose the position when a point is added.

When point is added and chart is zoomed, cannot scroll to see other data, the chart reset the data visualization from the beginning.

Unplanned

Last Updated: 02 Aug 2023 15:27 by Dennis

Chart: [iOS] When the first series has null value, other bar series are not rendered correctly

Created by: Dennis

Comments: 0

Category: Chart

Type: Bug Report

Chart: [iOS] When the first series has null value, other bar series are not rendered correctly

On iOS is whenever the first series ItemSource has a null value, the other series are not plotted correctly in the graph.

Unplanned

Last Updated: 02 Aug 2023 15:13 by Dennis

Chart: [iOS] Some points in stacked bar series are rendered behind another bar series

Created by: Dennis

Comments: 0

Category: Chart

Type: Bug Report

Chart: [iOS] Some points in stacked bar series are rendered behind another bar series

When having many stack bar series in one chart, some data points are rendered behind another data points. Check the attached image: how it looks on android and on iOS

Unplanned

Last Updated: 01 Jun 2023 07:56 by HV

Chart: [Xamarin.Android] LabelTextColor does not apply on Axis

Created by: HV

Comments: 0

Category: Chart

Type: Bug Report

Chart: [Xamarin.Android] LabelTextColor does not apply on Axis

When setting LabelTextColor, it does not apply to the chart axis

verticalAxis.LabelTextColor = Android.Graphics.Color.Red;

horizontalAxis.LineColor = Android.Graphics.Color.Red;

Unplanned

Last Updated: 28 Mar 2023 08:27 by James

Chart: [UWP] Resetting the zoom does not work every time

Created by: James

Comments: 0

Category: Chart

Type: Bug Report

Chart: [UWP] Resetting the zoom does not work every time

When having the following code on a button click

private void Button_Clicked(object sender, System.EventArgs e)
{
       this.chart.Zoom = new Size();
}

The chart zoom is reset first time, but when zooming again and pressing the button, the zoom level does not reset. You have to pan the chart, then zoom reset works.

This code resets the zoom:

private void OnResetZoomClicked(object sender, EventArgs e)
{
	this.chart.Zoom = new Size(1, 1); // This line is added as a workaround to reset the Zoom level
	this.chart.Zoom = new Size();
}

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: 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: 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: Cleanwatts

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