aistudio-wpf-diagram/AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml

<UserControl x:Class="AIStudio.Wpf.DiagramDesigner.TextControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:dd="clr-namespace:AIStudio.Wpf.DiagramDesigner"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <UserControl.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/AIStudio.Wpf.DiagramDesigner;component/Styles/TextBox.xaml" />
                <ResourceDictionary>
                    <dd:ColorBrushConverter x:Key="ColorBrushConverter" />
                    <dd:TrueToFalseConverter x:Key="TrueToFalseConverter"/>
                </ResourceDictionary>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>     
    </UserControl.Resources>
    <Grid IsHitTestVisible="{Binding IsHitTestVisible}">       
        <TextBox x:Name="PART_TextBlock"                         
                         Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=LostFocus}"  
                         Foreground="{Binding FontViewModel.FontColor,Converter={StaticResource ColorBrushConverter}}"
                         FontSize="{Binding FontViewModel.FontSize}" 
                         FontFamily="{Binding FontViewModel.FontFamily}"  
                         FontWeight="{Binding FontViewModel.FontWeight}"
                         FontStyle="{Binding FontViewModel.FontStyle}"                         
                         FontStretch="{Binding FontViewModel.FontStretch}"
                         TextDecorations="{Binding FontViewModel.TextDecorations}"
                         HorizontalContentAlignment="{Binding FontViewModel.HorizontalAlignment}"
                         VerticalContentAlignment="{Binding FontViewModel.VerticalAlignment}"
                         TextBlock.LineHeight="{Binding FontViewModel.LineHeight}"
                         AcceptsReturn="True"
                         IsHitTestVisible="False"
                         dd:ControlAttachProperty.Watermark="{Binding Path=(dd:ControlAttachProperty.Watermark),RelativeSource={RelativeSource AncestorType={x:Type dd:TextControl}}}"
                         Style="{StaticResource WaterTextBoxWithEffect}" IsReadOnly="True">
      
        </TextBox>
        <TextBox x:Name="PART_ShowText"
                         Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=LostFocus}"                                            
                         Foreground="{Binding FontViewModel.FontColor,Converter={StaticResource ColorBrushConverter}}"
                         IsReadOnly="{Binding IsReadOnlyText}"
                         FontSize="{Binding FontViewModel.FontSize}" 
                         FontFamily="{Binding FontViewModel.FontFamily}"  
                         FontWeight="{Binding FontViewModel.FontWeight}"
                         FontStyle="{Binding FontViewModel.FontStyle}"                         
                         FontStretch="{Binding FontViewModel.FontStretch}"
                         TextDecorations="{Binding FontViewModel.TextDecorations}"
                         HorizontalContentAlignment="{Binding FontViewModel.HorizontalAlignment}"
                         VerticalContentAlignment="{Binding FontViewModel.VerticalAlignment}"
                         TextBlock.LineHeight="{Binding FontViewModel.LineHeight}"
                         AcceptsReturn="True"   
                         Focusable="False"
                         dd:ControlAttachProperty.Watermark="{Binding Path=(dd:ControlAttachProperty.Watermark),RelativeSource={RelativeSource AncestorType={x:Type dd:TextControl}}}"
                         Style="{StaticResource WaterTextBoxWithEffect}" Visibility="Collapsed">
        </TextBox>       
    </Grid>
</UserControl>