Problem with Needle.TailHeight

[David]

Hi,

I'm using the new RadRadialGauge (Q3 2011 SP1) to build a user control to visualize a valve. This valve should show a perfectly horizontal line if the valve is completely closed with a value of 0 and a perfectly vertical line if the valve is completely open with a value of 100. If the valve has a value of 50, the line will be a perfect diagonal line pointing north-west to south-east.

I'm created the following user control that works:

<UserControl
    x:Class="ucValve"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    d:DesignHeight="48"
    d:DesignWidth="48"
    mc:Ignorable="d">
    <Grid>
        <telerik:RadRadialGauge>
            <telerik:RadRadialGauge.InnerBackground>
                <SolidColorBrush />
            </telerik:RadRadialGauge.InnerBackground>
            <telerik:RadRadialGauge.InnerBorderBrush>
                <SolidColorBrush />
            </telerik:RadRadialGauge.InnerBorderBrush>
            <telerik:RadRadialGauge.OuterBackground>
                <SolidColorBrush />
            </telerik:RadRadialGauge.OuterBackground>
            <telerik:RadRadialGauge.OuterBorderBrush>
                <SolidColorBrush />
            </telerik:RadRadialGauge.OuterBorderBrush>
            <telerik:RadialScale
                x:Name="Scale"
                MajorTickRelativeHeight="0"
                MajorTicks="0"
                Max="100"
                Min="0"
                Radius="1.25"
                StartAngle="180"
                SweepAngle="90">
                <telerik:RadialScale.Indicators>
                    <telerik:Needle
                        x:Name="Needle"
                        BorderBrush="Black">
                        <telerik:Needle.Style>
                            <Style TargetType="{x:Type telerik:Needle}" >
                                <Setter Property="telerik:ScaleObject.Location" Value="Inside" />
                                <Setter Property="telerik:ScaleObject.RelativeWidth" Value="0.05" />
                            </Style>
                        </telerik:Needle.Style>
                    </telerik:Needle>
                    <telerik:Pinpoint
                        Background="Black"
                        BorderThickness="1">
                        <telerik:Pinpoint.Style>
                            <Style
                                TargetType="{x:Type telerik:Pinpoint}">
                                <Setter Property="telerik:ScaleObject.Location" Value="Inside" />
                                <Setter Property="telerik:ScaleObject.RelativeHeight" Value="0.2" />
                                <Setter Property="telerik:ScaleObject.RelativeWidth" Value="0.2" />
                            </Style>
                        </telerik:Pinpoint.Style>
                    </telerik:Pinpoint>
                </telerik:RadialScale.Indicators>
                <telerik:RadialScale.LabelTemplate>
                    <DataTemplate />
                </telerik:RadialScale.LabelTemplate>
            </telerik:RadialScale>
        </telerik:RadRadialGauge>
    </Grid>
</UserControl>

with the following code behind:

Imports System.ComponentModel

Public Class ucValve

    Public Sub New()
        InitializeComponent()
        Value = valueDefaultValue
    End Sub

#Region "Properties"
    Private Const valueDefaultValue As Double = 0

    <Category("Common"), DefaultValue(valueDefaultValue)>
    Public Property Value As Double
        Get
            Return Needle.Value
        End Get
        Set(ByVal value As Double)
            Needle.Value = value
        End Set
    End Property

    Public ReadOnly Property Maximum As Double
        Get
            Return Scale.Max
        End Get
    End Property

    Public ReadOnly Property Minimum As Double
        Get
            Return Scale.Min
        End Get
    End Property
#End Region
End Class

This successfully renders the top left half of the valve. To render the bottom right half of the value, I change the XAML:

<telerik:Needle
    x:Name="Needle"
    BorderBrush="Black">

to:

<telerik:Needle
    x:Name="Needle"
    BorderBrush="Black"
    TailHeight="1">

While the user control successfully displays the bottom right half of the valve, when I embed this new user control into a window, I get the following error message:

An Unhandled Exception has occurred
'-INF' is not a valid value for property 'Height'.
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at Telerik.Windows.Controls.Gauge.Needle.Resize() in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Gauge\Indicators\Needle.cs:line 96
   at Telerik.Windows.Controls.Gauge.ScaleObject.OnValueChanged(DependencyObject source) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Gauge\ScaleObject.cs:line 399
   at Telerik.Windows.Controls.Gauge.InteractiveIndicator.RefreshIndicator() in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Gauge\Indicators\InteractiveIndicator.cs:line 237
   at Telerik.Windows.Controls.Gauge.InteractiveIndicator.OnValueChanged(Double oldValue, Double newValue) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Gauge\Indicators\InteractiveIndicator.cs:line 190
   at Telerik.Windows.Controls.Gauge.GraphicIndicator.InternalValuePropertyChangedHandler(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs eventArgs) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Gauge\Indicators\GraphicIndicator.cs:line 644
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at Telerik.Windows.Controls.Gauge.IndicatorHelper.RefreshInternalValue(GraphicIndicator indicator, Double value) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Gauge\Indicators\IndicatorHelper.cs:line 223
   at Telerik.Windows.Controls.Gauge.IndicatorHelper.CoerceValueProperty(DependencyObject source, Object value) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Gauge\Indicators\IndicatorHelper.cs:line 72
   at System.Windows.DependencyObject.ProcessCoerceValue(DependencyProperty dp, PropertyMetadata metadata, EntryIndex& entryIndex, Int32& targetIndex, EffectiveValueEntry& newEntry, EffectiveValueEntry& oldEntry, Object& oldValue, Object baseValue, Object controlValue, CoerceValueCallback coerceValueCallback, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, Boolean skipBaseValueChecks)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at Telerik.Windows.Controls.Gauge.GraphicIndicator.set_Value(Double value) in c:\TB\117\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Gauge\Indicators\GraphicIndicator.cs:line 385
   at AlentControls.ucValve.set_Value(Double value) in C:\Utveckling\Alent\AlentControls\ucValve.xaml.vb:line 19
   at AlentControls.ucValve..ctor() in C:\Utveckling\Alent\AlentControls\ucValve.xaml.vb:line 7

If I remove setting the TailHeight property to 1, it works. If I set the TailHeight property to any value, the above unhandled exception occurs.

Am I doing something wrong or is this an issue with the new RadRadialGauge (specifically, the Needle object).

Kind regards,
Dave.

[Sia]

Hello Dave,

Thank you for reporting this issue.

However, it is hard to replicate the exact issue from details provided. Please check the attached image. We appreciate if you open a formal support ticket and send us a sample runnable project which demonstrates the unwanted behavior. Thus we will do our best to provide you with a working solution. Thank you in advance for your cooperation.

Regards,
Sia
the Telerik team

[David]

Hi Sia,

Thanks for your reply. As requested, I've submitted a formal support ticket with a project containing the issue.

The error message occurs when the user control is embedded into any other component. While the user component containing the additionalTailHeight="1" successfully opens in design view, trying to embed this user control in any other component fails with a red cross where the user control should be with the described error message in design view and crashes when run.

Kind regards,
Dave.

[Sia]

Hello Dave,

I am copying my response from the other thread:

Thank you for the provided details and the thorough information. Unfortunately I should confirm that this is issue with our control. It is already logged and forwarded to our developers. You can track its progress in our Public Issues Tracking system.

Kind regards,
Sia
the Telerik team