Textbox with rounded corners

[sven]

Consider this code, which displays a textbox with rounded corners:

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:System="clr-namespace:System;assembly=mscorlib"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <ControlTemplate TargetType="TextBoxBase" x:Key="txt">
            <Border Padding="10" CornerRadius="10" BorderThickness="1" BorderBrush="Black" x:Name="Bd" Background="{TemplateBinding Panel.Background}">
                <ScrollViewer Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="UIElement.IsEnabled">
                    <Setter Property="Panel.Background" TargetName="Bd">
                        <Setter.Value>
                            <DynamicResource ResourceKey="{x:Static SystemColors.ControlBrushKey}" />
                        </Setter.Value>
                    </Setter>
                    <Setter Property="TextElement.Foreground">
                        <Setter.Value>
                            <DynamicResource ResourceKey="{x:Static SystemColors.GrayTextBrushKey}" />
                        </Setter.Value>
                    </Setter>
                    <Trigger.Value>
                        <System:Boolean>False</System:Boolean>
                    </Trigger.Value>
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
    </Window.Resources>
    <Grid>
        <TextBox
            Template="{StaticResource txt}"
            Margin="10"
            Padding="10"
            Background="Transparent"
            BorderThickness="0"
            Width="254"
            Height="55"/>
    </Grid>
</Window>

But if I add reference to telerik controls, then the border of the textbox is displayed again, regardles of the 'BorderThickness' property. This is my code in App.xaml (if I comment this out then everything is ok again):

        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/System.Windows.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/Telerik.Windows.Controls.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/Telerik.Windows.Controls.Navigation.xaml"/>
                <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/Telerik.Windows.Controls.Docking.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>


[Sia]

Hello Sven,

This behavior is caused by our default style that targets the MS ScrollViewer control (the gray border is actually its border). You can use the following template instead:

<ControlTemplate TargetType="TextBoxBase" x:Key="txt">
    <Border CornerRadius="10" BorderThickness="1" BorderBrush="Black" x:Name="Bd" Background="{TemplateBinding Panel.Background}">
        <ScrollViewer Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" BorderThickness="0" Background="Transparent" />
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="UIElement.IsEnabled">
            <Setter Property="Panel.Background" TargetName="Bd">
                <Setter.Value>
                    <DynamicResource ResourceKey="{x:Static SystemColors.ControlBrushKey}" />
                </Setter.Value>
            </Setter>
            <Setter Property="TextElement.Foreground">
                <Setter.Value>
                    <DynamicResource ResourceKey="{x:Static SystemColors.GrayTextBrushKey}" />
                </Setter.Value>
            </Setter>
            <Trigger.Value>
                <System:Boolean>False</System:Boolean>
            </Trigger.Value>
        </Trigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

Regards,
Sia
Telerik