We should consider splitting the Telerik.Xamarin.iOS.dll into separate DLLs so that the customers can reference only the controls they need.

In Selection Changed method SelectedSeries is always empty.

Is there other way to get which series is selected?

Hello guys,

Can you tell me is it possible to change Font Family in Rad Legend with some kind of workaround?  Im trying to find a way in renderer but i cant find any

In Xamarin Forms there is a serious need for a Rich Text Editor control that would allow you to do this such as highlight text, apply fonts, styles etc. I think a tool like this is in great demand among Xamarin developers. Currently there are some Open source controls that have implemented these features however they have not been maintained and cannot be relied on for enterprise solutions

The TabView control should support a swipe event to change the active item. Similar to the ListView with the IsItemSwipeEnabled-property.

April 2020 Deadline

Apple will no longer accept applications published with anything less than Xamarin.Forms 4.5 after April 2020.

This is due to the UIWebView flag that is in Xamarin.Forms 4.4 and earlier

ITMS-90809: Deprecated API Usage- Apple will stop accepting submissions of apps that use UIWebView APIs starting from April 2020 . 

Solution

Please visit this documentation for full explanation. Just to share the highlights, Telerik UI for Xamarin will need to:

• Xamarin.Forms 4.5 or higher – Pre-release versions of Xamarin.Forms 4.5 can be used.
• Xamarin.iOS 13.10.0.17 or higher – Check your Xamarin.iOS version in Visual Studio. This version of Xamarin.iOS is included with Visual Studio for Mac 8.4.1 and Visual Studio 16.4.3.
• Remove references to UIWebView – Your code should not have any references to UIWebView or any classes that make use of UIWebView.

Hi,

I was checking your updates on my mobile and the app crashed.

Steps:

1. Go to Calendar & Scheduling

2. Agenda View Configuration

3. Scroll to 2022 for example

4. Press Today button - app crashes

It is easily reproducuble.

Here is the log from logcat:

05-15 07:52:09.267  5756  5756 E AndroidRuntime: FATAL EXCEPTION: main
05-15 07:52:09.267  5756  5756 E AndroidRuntime: Process: com.telerik.xamarin, PID: 5756
05-15 07:52:09.267  5756  5756 E AndroidRuntime: java.lang.ArrayIndexOutOfBoundsException: length=109; index=-1
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at java.util.ArrayList.get(ArrayList.java:439)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.telerik.widget.calendar.agendaview.CalendarAgendaView$1.onScrolled(CalendarAgendaView.java:78)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.support.v7.widget.RecyclerView.dispatchOnScrolled(RecyclerView.java:4961)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.support.v7.widget.RecyclerView.dispatchLayoutStep3(RecyclerView.java:4021)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3652)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:4194)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.telerik.widget.calendar.agendaview.CalendarAgendaLayout.arrange(CalendarAgendaLayout.java:102)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.telerik.widget.calendar.RadCalendarView.onLayout(RadCalendarView.java:1132)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.ViewRenderer_2.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.ViewRenderer_2.onLayout(ViewRenderer_2.java:47)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout(FormsViewGroup.java:37)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.onLayout(VisualElementRenderer_1.java:81)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout(FormsViewGroup.java:37)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.onLayout(VisualElementRenderer_1.java:81)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout(FormsViewGroup.java:37)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.onLayout(VisualElementRenderer_1.java:81)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout(FormsViewGroup.java:37)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.onLayout(VisualElementRenderer_1.java:81)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout(FormsViewGroup.java:37)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.VisualElementRenderer_1.onLayout(VisualElementRenderer_1.java:81)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout(FormsViewGroup.java:37)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md59ee76e6e58d2e8d37e01f503ba67c2ac.RadViewContainerBase.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md59ee76e6e58d2e8d37e01f503ba67c2ac.RadViewContainerBase.onLayout(RadViewContainerBase.java:46)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.ViewRenderer_2.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.ViewRenderer_2.onLayout(ViewRenderer_2.java:47)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout(FormsViewGroup.java:37)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.PageRenderer.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.PageRenderer.onLayout(PageRenderer.java:72)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout(FormsViewGroup.java:37)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md58432a647068b097f9637064b8985a5e0.NavigationPageRenderer.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md58432a647068b097f9637064b8985a5e0.NavigationPageRenderer.onLayout(NavigationPageRenderer.java:65)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.xamarin.forms.platform.android.FormsViewGroup.measureAndLayout(FormsViewGroup.java:37)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.PlatformRenderer.n_onLayout(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at md51558244f76c53b6aeda52c8a337f2c37.PlatformRenderer.onLayout(PlatformRenderer.java:55)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1083)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.android.internal.policy.DecorView.onLayout(DecorView.java:1041)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.View.layout(View.java:22419)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewGroup.layout(ViewGroup.java:6584)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:3378)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2842)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1888)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8511)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.Choreographer.doCallbacks(Choreographer.java:761)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.Choreographer.doFrame(Choreographer.java:696)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.os.Handler.handleCallback(Handler.java:873)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:99)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:214)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:7050)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
05-15 07:52:09.267  5756  5756 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)

Can you PLEASE make your ribbon control and rich text edit control for Xamarin.Forms?

As iPadOS is becoming such a desktop OS, I feel a word processing component is such a necessity. Plus, macOS Support is there too! There's no reason why your desktop components shouldn't be available on Xamarin.Forms as Xamarin.Forms is supporting more and more desktop operating systems.

Runtime exception: Java.Lang.RuntimeException: Font asset not found Fonts/telerikfont.ttf, when trying to access any page with controls that use telerikfont, like AutoCompleteView, TreeView, etc.

Add MVVM friendly commands for all list view interaction events: ItemTapped, ItemSwipeStarting, ItemSwiping, ItemSwipeCompleted, RefreshRequested

Please add a Step Line series type to RadCartesianchart.

As an example, see UI for ASP.NET AJAX's version here https://demos.telerik.com/aspnet-ajax/htmlchart/examples/charttypes/spline-and-step-line-chart/defaultcs.aspx

The chart's series are not detecting property changed notifications on items in the series.

Note:

• This works as expected in UWP
• The series also doesn't seem to detect any ItemsSource property changes either.

Reproducible

If you have a data model where the properties are using INotifyPropertyChanged, for example from your NotifyPropertyChangedBase

public class Item : NotifyPropertyChangedBase
{
    private DateTime date;
    private int value;

    public DateTime Date
    {
        get => date;
        set => UpdateValue(ref date, value);
    }

    public int Value
    {
        get => value;
        set => UpdateValue(ref this.value, value);
    }
}

Here's a view model to use, invoke the command to observe the problem

public class MainViewModel : NotifyPropertyChangedBase
{
    public MainViewModel()
    {
        var rand = new Random();

        DataPoints = new ObservableCollection<Item>(Enumerable.Range(1,5).Select(i=>new Item
        {
            Date = DateTime.Today.AddDays(-i),
            Value = rand.Next(1,10)
        }));

        ChangeDataCommand = new Command(() =>
        {
            foreach (var dataPoint in DataPoints)
            {
                dataPoint.Value = rand.Next(1, 20);
            }
        });
    }

    private ObservableCollection<Item> dataPoints;
    public ObservableCollection<Item> DataPoints
    {
        get => dataPoints;
        set => UpdateValue(ref dataPoints, value);
    }

    public Command ChangeDataCommand { get; set; }
}

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>

    <telerikChart:RadCartesianChart x:Name="Chart">
        <telerikChart:RadCartesianChart.HorizontalAxis>
            <telerikChart:DateTimeContinuousAxis LabelFormat="MM-dd"
                                                 LabelFitMode="Rotate" />
        </telerikChart:RadCartesianChart.HorizontalAxis>
        <telerikChart:RadCartesianChart.VerticalAxis>
            <telerikChart:NumericalAxis Minimum="0" Maximum="10"/>
        </telerikChart:RadCartesianChart.VerticalAxis>
        <telerikChart:RadCartesianChart.Series>
            <telerikChart:LineSeries ValueBinding="Value"
                                           CategoryBinding="Date"
                                           ItemsSource="{Binding DataPoints}" />
        </telerikChart:RadCartesianChart.Series>
    </telerikChart:RadCartesianChart>

    <Button Text="Change Data"
            Command="{Binding ChangeDataCommand}"
            HorizontalOptions="Fill"
            Margin="5"
            Grid.Row="1"/>
</Grid>

A SweepAxis (aka SweepSeries) is a chart where where the data is plotted from Left-to-Right and when the Data reaches the end, then any new data will start from the left side again by overwriting the oldest data in the chart.

A good example of this in an application is Windows's PerfMon application.