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POBorderThickness of 1 renders with a 2-pixel thickness - what am I missing here?
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  1. POBorderThickness of 1 renders with a 2-pixel thickness - what am I missing here?
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    copied!<p>I've got a Border in XAML/WPF that I'm using to give a full-paragraph-width underline to text headings in a dialog. I set its BorderThickness property to "0,0,0,1". In some places, it ends up being rendered with a 2-pixel thick underline while in others it appears correctly as a single-pixel underline. What am I doing wrong?</p> <p>Here's the control template I'm using to replace my label's visual tree (the use of a template is inconsequential, I would've thought):</p> <pre><code>&lt;ControlTemplate x:Key="HeaderTemplate" TargetType="{x:Type Label}"&gt; &lt;Border BorderThickness="0,0,0,1" Margin="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Margin}"&gt; &lt;Border.BorderBrush&gt; &lt;LinearGradientBrush StartPoint="0,0" EndPoint="1,0"&gt; &lt;GradientStop Offset="0" Color="Black"/&gt; &lt;GradientStop Offset="0.6" Color="Black"/&gt; &lt;GradientStop Offset="1" Color="Transparent"/&gt; &lt;/LinearGradientBrush&gt; &lt;/Border.BorderBrush&gt; &lt;TextBlock Text="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Content}" Style="{StaticResource HeaderStyle}" Margin="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Padding}"/&gt; &lt;/Border&gt; &lt;/ControlTemplate&gt; </code></pre> <p>I'm pretty new to WPF, so I suspect I'm missing something fundamental about its rendering model.</p> <ul> <li>Is the border rendering over a pixel boundary? Doesn't seem that way, as I would've thought it would be partially transparent if so.</li> <li>Is there a way to guarantee that I get what I'm asking for in terms of thickness?</li> <li>Have I even made a howling error?</li> </ul> <p>And for reference, I'm not applying a scaling transform (or any other sort of transform for that matter). Any help would be appreciated. :)</p>
 

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