Questions on UI for WPF Forum

1 answer

231 views

How to extract Theme settings when using XAML.DLL / StyleManager?

Is there a way to extract active theme settings from the StyleManager?

Cheers, Rob.

General Discussions

answered on 27 Jan 2021

2 answers

251 views

Styling tabitem

I am trying to change the selected tab's background color. I've managed to do this the following code, but when i run the project, I can't select any tabs at all. Nothing happens when I click a tab.

<Window.Resources>

<Style TargetType="{x:Type telerik:RadTabItem}">

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="{x:Type telerik:RadTabItem}">

<Grid >

<Border

Name="Border"

Background="LightBlue"

BorderBrush="Black"

BorderThickness="1,1,1,1"

CornerRadius="6,6,0,0" >

<ContentPresenter x:Name="ContentSite" Margin="12,2,12,2" VerticalAlignment="Center" HorizontalAlignment="Center" ContentSource="Header"/>

</Border>

</Grid>

<ControlTemplate.Triggers>

<Trigger Property="IsSelected" Value="True">

<Setter TargetName="Border" Property="Background" Value="LightBlue" />

</Trigger>

<Trigger Property="IsSelected" Value="False">

<Setter TargetName="Border" Property="Background" Value="LightGray" />

</Trigger>

</ControlTemplate.Triggers>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

</Window.Resources>

TabControl

answered on 27 Jan 2021

6 answers

289 views

ArgumentNullException in GetValidationErrors

Hello

Do I get it right, that when I receive following exception, that means that somewhere my ```INotifyDataErrorInfo.GetErrors``` returns null instead of empty list?

```

System.ArgumentNullException: Value cannot be null.
Parameter name: collection
   at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
   at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection)
   at Telerik.Windows.Controls.GridViewBoundColumnBase.GetDataErrorValidationErrors(Object dataItem, String propertyName, GridViewValidationType gridViewValidationType)
   at Telerik.Windows.Controls.GridViewBoundColumnBase.GetValidationErrors(Object dataItem, String propertyName)
   at Telerik.Windows.Controls.GridView.GridViewCell.GetDataErrors()
   at Telerik.Windows.Controls.GridView.GridViewCell.UpdateIsValidState()
   at Telerik.Windows.Controls.GridView.GridViewDataControl.Telerik.Windows.Data.IWeakEventListener<System.ComponentModel.DataErrorsChangedEventArgs>.ReceiveWeakEvent(Object sender, DataErrorsChangedEventArgs args)
   at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

```

GridView

answered on 27 Jan 2021

2 answers

229 views

Setting TextAlignment of GridViewExpressionColumn at Runtime

Hi

I'm attempting to set the TextAlignment property of a GridViewExpressionColumn at runtime. The property is set correctly but the change is not reflected in the grid. The same change to a GridViewDataColumn works as I would expect - the alignment is set visually on the screen straight away.

var col = this.RadGridView.Columns[0];

col.TextAlignment = TextAlignment.Right;

I have found that it the column is removed and re-inserted it will work correctly:

var col = this.RadGridView.Columns[0];

this.RadGridView.Columns.Remove(col);

col.TextAlignment = TextAlignment.Right;

this.RadGridView.Columns.Insert(0, col);

Is this a bug? Or am I missing something?

Regards

Dave

GridView

answered on 26 Jan 2021

1 answer

1.7K+ views

How to use SVG icon in RibbonButton

Hello:

We have several SVG icons designed by company, but we cannot find a way to use them on Robbon buttons,

Is there any solution that we can use .svg for button icon?

Thanks!

RibbonView and RibbonWindow

answered on 26 Jan 2021

1 answer

156 views

Pause during animation?

I'm getting a strange pause during the animation of a callout? See code below:

Private Sub imHelpEnhanceDistance_MouseDown(sender As Object, e As MouseButtonEventArgs) Handles imHelpEnhanceDistance.MouseDown

Try

Dim clCodeCallout As New RadCallout()

With clCodeCallout

.FontSize = 10

.Content = "My helpful Text Message"

.Width = 210

.Height = 70

.TextWrapping = TextWrapping.Wrap

.Background = Brushes.DarkGreen

.Foreground = Brushes.White

End With

Dim clSettings As New CalloutPopupSettings()

With clSettings

.Placement = System.Windows.Controls.Primitives.PlacementMode.Top

.CanPopupExceedScreen = True

.ShowAnimationDuration = 0.55D

.ShowAnimationEasing = New BounceEase() With {.EasingMode = EasingMode.EaseOut, .Bounces = 20, .Bounciness = 5}

.CloseAnimationEasing = New CircleEase() With {.EasingMode = EasingMode.EaseOut}

.CloseAnimationDuration = 0.3D

.ShowAnimationType = CalloutAnimation.Move

.CloseAnimationType = CalloutAnimation.Move

.AutoClose = True

End With

CalloutPopupService.Show(clCodeCallout, TryCast(sender, FrameworkElement), clSettings)

Catch ex As Exception

Log.Write(ex)

End Try

End Sub

Callout

answered on 21 Jan 2021

10 answers

258 views

Clustering of moving map markers

Hi

I am wondering if it is possible to use the clustering features available in RadMap to be able to group moving map markers?

For example 1) Two vehicles driving next to each other along a road show as a moving cluster

For example 2) Two vehicles driving towards each other on a road, cluster when close to each other, then separate when they have passed each other

In both examples, can the cluster(s) be recalculated when marker locations change so that the cluster marker moves / de-clusters as appropriate?

I understand that the clustering features work great with static markers (like in the 'airports' example) and I understand that clusters can be regenerated on a map zoom but I cannot see a way to regenerate, move and possibly break-up a cluster on a marker location change.

Am I missing something obvious?

Thanks

Map

answered on 21 Jan 2021

1 answer

101 views

Offline documentation is badly formatted

Hello,

This already appears with previous release and is still visible with the current one: it seems that the stylesheet is missing as no formatting is applied to the text...

General Discussions

answered on 21 Jan 2021

1 answer

105 views

Ability to set multiple Intervals in DayView

Currently a DayViewDefinition in RadScheduleView is

<telerik:DayViewDefinition MinorTickLength="30min" MajorTickLength="2h" />

I am trying to achieve a different tick interval value before midday and another tick interval value after midday

For example
For 6 AM to 12 PM, we are looking to set 10 minute slot and after 12 PM we are looking to set 9 minute slot

Can this achieved somehow ?

ScheduleView

answered on 21 Jan 2021

7 answers

150 views

Can I customize the Windows8Touch theme Gradient Brushes?

I've managed to customize all the colors for the Windows8Touch theme to my liking to make it a generally dark theme. I get the Windows8TouchPalette at startup and set the colors that the Telerik docs recommend.

However I still do not like the Gradient Background brush. It appears too light for what I want. I would like to be able to either directly set it to make it darker or simply make the theme use solid brushes in place of the gradient ones .

Is there a way to directly alter the gradient brushes -- individually - in this theme? Or is it simply constructed from the colors I specify and I have no other control over it?

General Discussions

answered on 21 Jan 2021