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POWPF Label adapt FontSize to it's Width and Height
 

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    <p>I need to develop a <code>Label</code> control in <strong>WPF</strong>, on <strong>.NET 3.5</strong> and <strong>VisualStudio 2010</strong>, in which the <code>FontSize</code> will automatically make the text fill the control area.</p> <p>I don't know if I should create a <code>CustomControl</code> inheriting from <code>Label</code> or if I should create a <code>UserControl</code> which contains a <code>Label</code> control.</p> <p>I've seen an example here using a <code>ValueConverter</code>, but I'm not understanding its behavior, here: <a href="http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/89167931-0813-4d6a-92b7-42a3323a5bd2" rel="nofollow noreferrer">change font size dynamically</a>.</p> <p>Can anyone give me a clue about that?</p> <p><strong>Update:</strong> </p> <p>I found the solutiion using the <code>DoubleConverter</code> from the example I've posted before:</p> <p>The soultion is using a <code>ValueConverter</code>, which I extracted from the example, but added the NumerFormat IFormatProvider to correctly parse "0.1" value, I found that at <a href="http://bytes.com/topic/c-sharp/answers/495594-decimal-d1-decimal-parse-0-1-1-a" rel="nofollow noreferrer">Decimal d1 = Decimal.Parse("0.1"); // = 1?!?</a>:</p> <pre><code> [ValueConversion(typeof(object), typeof(double))] public class DoubleConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { double dblValue = (double)value; double scale = Double.Parse(((string)parameter), System.Globalization.CultureInfo.InvariantCulture.NumberFormat); return dblValue * scale; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } </code></pre> <p>Then, you have to instantiate in XAML the <code>DoubleConverter</code>, and specify the binding in the <code>FonSize</code> Property:</p> <pre><code>&lt;UserControl x:Class="&lt;Namespace&gt;.LabelAutoFontSize" 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:me="clr-namespace:&lt;Namespace&gt;" mc:Ignorable="d" d:DesignHeight="60" d:DesignWidth="278"&gt; &lt;UserControl.Resources&gt; &lt;me:DoubleConverter x:Key="doubleConverter" /&gt; &lt;/UserControl.Resources&gt; &lt;Grid&gt; &lt;Label x:Name="lbl" FontSize="{ Binding Path=Width, RelativeSource={RelativeSource AncestorType={x:Type UserControl}}, Converter={StaticResource doubleConverter}, ConverterParameter=0.116}" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Content="LabelAutoFontSize" d:LayoutOverrides="Width" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" /&gt; &lt;/Grid&gt; &lt;/UserControl&gt; </code></pre> <p>An important point is that the value for <code>ConverterParameter</code> depends absolutely from the font assigned. Each font may need a different value and you have to "play around" to get the correct value to fit exactly.</p>
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    1. COWell I finally quit this way and used: <Viewblock> <TextBlock/> <ViewBlock> Quite simple and effective.
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    2. COYou should add your solution as an answer and mark it as correct.
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      1. USJack B Nimble
 

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