Questions on UI for Xamarin Forum

3 answers

123 views

RadVerticalGauge does not take full canavs space

Hi, I am using RadVerticalGauge for my app and I am encoutering an issue similar to https://www.telerik.com/forums/radradialgauge-not-taking-full-width.

Indeed, I would like to reduce the space taken by the gauge canvas. I have tried using negative margin on the gauge but without success.

Attached the current result.

How can I achieve this ?

Thanks in advance

Gauges

answered on 11 Feb 2019

4 answers

200 views

FontFamily setting crashes iOS

hi

if we set font family in autocompleteview, iOS application crashes.

in page,

FontFamily="{StaticResource RegularFont}"

in App.xaml,

<OnPlatform x:TypeArguments="x:String" x:Key="RegularFont">

<On Platform="Android" Value="Heebo-Light.ttf#Heebo Light"/>

<On Platform="iOS" Value="HelveticaNeue"/>

<On Platform="UWP" Value="Assets/Fonts/HelveticaNeue.ttf#HelveticaNeue"/>

</OnPlatform>

Crash details,

Message,

Value cannot be null.

Parameter name: descriptor

Stacktrace,

at UIKit.UIFont._FromDescriptor (UIKit.UIFontDescriptor descriptor, System.nfloat pointSize) [0x0000e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.2.1.13/src/Xamarin.iOS/UIKit/UIFont.g.cs:106

at UIKit.UIFont.FromDescriptor (UIKit.UIFontDescriptor descriptor, System.nfloat pointSize) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.2.1.13/src/Xamarin.iOS/UIKit/UIFont.cs:179

at Telerik.XamarinForms.InputRenderer.iOS.EntryAdapter.UpdateFont (Telerik.XamarinForms.Input.RadEntry sourceOwner, Telerik.XamarinForms.InputRenderer.iOS.BorderUITextField targetOwner) [0x0007a] in <

e72706fd0dd5405fabc91cd72e3c9f5d>:0

at Telerik.XamarinForms.InputRenderer.iOS.EntryAdapter.UpdateCore (Telerik.XamarinForms.Input.RadEntry sourceOwner, Telerik.XamarinForms.InputRenderer.iOS.BorderUITextField targetOwner, System.String propertyName) [0x0014d] in <

e72706fd0dd5405fabc91cd72e3c9f5d>:0

at Telerik.XamarinForms.Common.FacadeAdapterBase`2[S,T].Update (System.Object sourceOwner, System.Object targetOwner, System.String propertyName, System.Object sourceOwnerRoot, System.Object targetOwnerRoot) [0x00000] in <

b1d124df8dbf4987b1a7f6b0a5485748>:0

at Telerik.XamarinForms.Common.XamarinToNativeControlExtensions.Update[T,K] (T nativeElement, K xfЕlement, System.String propertyName, System.Object sourceOwnerRoot, System.Object targetOwnerRoot) [0x00031] in <

b1d124df8dbf4987b1a7f6b0a5485748>:0

at Telerik.XamarinForms.InputRenderer.iOS.EntryRenderer.OnElementPropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x0002a] in <

e72706fd0dd5405fabc91cd72e3c9f5d>:0

at (wrapper delegate-invoke) <Module>.invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)

at Xamarin.Forms.BindableObject.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:150

at Xamarin.Forms.Element.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:370

at Telerik.XamarinForms.Input.RadEntry.OnPropertyChanged (System.String propertyName) [0x0002a] in <e72706fd0dd5405fabc91cd72e3c9f5d>:0

at Xamarin.Forms.BindableObject.SetValueActual (Xamarin.Forms.BindableProperty property, Xamarin.Forms.BindableObject+BindablePropertyContext context, System.Object value, System.Boolean currentlyApplying, Xamarin.Forms.Internals.SetValueFlags attributes, System.Boolean silent) [0x00114] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:623

at Xamarin.Forms.BindableObject.SetValueCore (Xamarin.Forms.BindableProperty property, System.Object value, Xamarin.Forms.Internals.SetValueFlags attributes, Xamarin.Forms.BindableObject+SetValuePrivateFlags privateAttributes) [0x0015b] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:417

at Xamarin.Forms.BindingExpression.ApplyCore (System.Object sourceObject, Xamarin.Forms.BindableObject target, Xamarin.Forms.BindableProperty property, System.Boolean fromTarget) [0x00225] in D:\a\1\s\Xamarin.Forms.Core\BindingExpression.cs:173

at Xamarin.Forms.BindingExpression.Apply (System.Boolean fromTarget) [0x0003e] in D:\a\1\s\Xamarin.Forms.Core\BindingExpression.cs:57

at Xamarin.Forms.BindingExpression+BindingExpressionPart.<PropertyChanged>b__49_0 () [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindingExpression.cs:615

at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.2.1.13/src/Xamarin.iOS/Foundation/NSAction.cs:152

at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)

at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.2.1.13/src/Xamarin.iOS/UIKit/UIApplication.cs:79

at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0002c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.2.1.13/src/Xamarin.iOS/UIKit/UIApplication.cs:63

at listLayout.iOS.Application.Main (System.String[] args) [0x00001] in /Users/xamarindev/Documents/sample/listLayout/listLayout/listLayout.iOS/Main.cs:17

AutoCompleteView

answered on 11 Feb 2019

1 answer

155 views

Add color in WatermarkText

Hi

We are using RadEntry as entry in our project. If you see the attached image, we want to use WatermarkText as placeholder where the text will have regular color & asterisk will be in red. Is it possible in RadEntry?

Entry

answered on 08 Feb 2019

3 answers

176 views

Latest XAmarin.Forms Breaks Latest Telerik Xamarin Forms Android

The latest Xamarin.Forms (3.5.0.129452, just released) requires, for Android Pie, the latest Android Support Library series (28.0.0.1). Upgrading all these in an Android project using Telerik will not build in VS 2017 until the ancient Xamarin.Android.Support.V8.RenderScript, not available in that series, is removed. Unfortunately Telerik requires that dll for some controls. Although the project can then build, it crashes on trying to use a dependent control.

To put it another way, it would seem Telerik needs to remove its dependencies on RenderScript, seeing that Xamarin has not seen fit to update it.

General Discussions

answered on 08 Feb 2019

1 answer

250 views

PdfViewer : FitToWidth on StartUp?

PdfViewer : FitToWidth on StartUp?

Is there a setting to set the viewer to display fit to width when the pdf file opens?

<?xml version="1.0" encoding="utf-8" ?>

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"

xmlns:telerikPdf="clr-namespace:Telerik.XamarinForms.PdfViewer;assembly=Telerik.XamarinForms.PdfViewer"

xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"

xmlns:telerikCommon="clr-namespace:Telerik.XamarinForms.Common;assembly=Telerik.XamarinForms.Common"

x:Class="TelerikXamarinApp1.Portable.Page1">

<ContentPage.Content>

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition />

</Grid.RowDefinitions>

<telerikPdf:RadPdfViewerToolbar PdfViewer="{Binding Source={x:Reference pdfViewer}}">

<telerikPdf:ZoomInToolbarItem />

<telerikPdf:ZoomOutToolbarItem />

<telerikPdf:NavigateToNextPageToolbarItem/>

<telerikPdf:NavigateToPreviousPageToolbarItem/>

<telerikPdf:NavigateToPageToolbarItem/>

<telerikPdf:FitToWidthToolbarItem/>

</telerikPdf:RadPdfViewerToolbar>

<telerikPdf:RadPdfViewer x:Name="pdfViewer" Grid.Row="1" FitToWidthCommand=""/>

</Grid>

<!--<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition/>

</Grid.RowDefinitions>

<telerikCommon:RadUniformGrid>

<Button Text="Zoom In"

Command="{Binding Source={x:Reference pdfViewer}, Path=ZoomInCommand}" />

<Button Text="Zoom Out"

Command="{Binding Source={x:Reference pdfViewer}, Path=ZoomOutCommand}" />

<Button Text="Fit To Width"

Command="{Binding Source={x:Reference pdfViewer}, Path=FitToWidthCommand}" />

<Button Text="Previous Page"

Command="{Binding Source={x:Reference pdfViewer}, Path=NavigateToPreviousPageCommand}" />

<Button Text="Next Page"

Command="{Binding Source={x:Reference pdfViewer}, Path=NavigateToNextPageCommand}" />

</telerikCommon:RadUniformGrid>

<telerikPdf:RadPdfViewer x:Name="pdfViewer"

Grid.Row="1"

MinZoomLevel="0.3"

MaxZoomLevel="4"/>

</Grid>-->

<!--<StackLayout>

<Label Text="Invoice Viewer"

VerticalOptions="CenterAndExpand"

HorizontalOptions="CenterAndExpand" />

<telerikPdf:RadPdfViewerToolbar PdfViewer="{Binding Source={x:Reference pdfViewer}}">

<telerikPdf:NavigateToPreviousPageToolbarItem />

<telerikPdf:NavigateToPageToolbarItem/>

<telerikPdf:NavigateToNextPageToolbarItem />

<telerikPdf:ZoomInToolbarItem/>

<telerikPdf:ZoomOutToolbarItem/>

<telerikPdf:FitToWidthToolbarItem/>

</telerikPdf:RadPdfViewerToolbar>

<telerikPdf:RadPdfViewer x:Name="pdfViewer" Scale="50"

FitToWidthCommand="True"

/>

</StackLayout>-->

</ContentPage.Content>

</ContentPage>

Regards,

Graham

PdfViewer

answered on 08 Feb 2019

1 answer

87 views

Need pure C# examples

The SDKBrowser set of examples is ALL XAML!! What about all of the developers that do not like/use XAML, like myself? Sometimes it is not easy to convert a XAML example to the equivalent pure C# version. I would like the SDKBrowser to include BOTH the current XAML examples AND pure C# versions of the same thing.

Why do I not like XAML, you may ask?

XAML is a different language than C#. I prefer to work in 1 language if possible
With Visual Studio for Mac, refactoring does not work with XAML. If my XAML includes "{Binding Name}" and then I rename the Name property to Title, the XAML is NOT refactored too (I am told this does work on Windows, but I know it does NOT work on Mac). Therefore, my project no longer binds correctly since Name no longer exists.
XAML makes it harder, if not impossible, to use Abstract Page classes. Maybe I have some common UI in a few of my pages, so I make an AbstractPage with that common UI. Then I make derived classes that construct more specific UI around the common UI. I am not sure if that is possible with XAML, having 1 XAML page extend/inherit another.

General Discussions

answered on 08 Feb 2019

1 answer

146 views

Dynamic in cell editing?

Is it possible to use the Edit command API to dynamically change the cell content to my own custom editor? I would like my datagrid to look like everything is a text cell, but when I double click a cell, I want a custom editor control to appear as the cell content instead. The user then uses the custom editor control to change the value, and then when he commits the edit, the dynamic custom editor control disappears and I see the text cell again, but with the new value. I think this is how the normal editing commands work on the data grid, but I want to use my own custom editors instead of the default ones.

DataGrid

answered on 07 Feb 2019

1 answer

111 views

Resign Keyboard of Autocomplete Textview

Hello,

I have an issue with ,

I have a scenario like send Message to the Recipients,

When select any Token, will appear, and then can not disappear keyboard with the *Return key*. I have to compulsory delete that Token for the keyboard,

Even, AutocompleteTextView.ResignFirstResponder() not disappearing Keyboard.

So, If can help me this, will be appreciated.

Thanks,

AutoCompleteTextView - Xamarin.iOS

answered on 07 Feb 2019

3 answers

312 views

Change Border Color on SegmentedControl

Hi, Can you tell me how to change the color on a SegmentedControl please? Attached is my implementation and you can see the white border lines. I'd like control of the color so I can have it blend in better.

Thank you,
Brian

SegmentedControl

answered on 07 Feb 2019

1 answer

92 views

exception

Hi,

after update The last version of XF i get this error in Release Mode :

any Idea?

thanks

DataGrid

answered on 07 Feb 2019