How can I create a WPF control (similar to a TextBlock) so that any overflowing text is faded out to transparent rather than simply clipping or wrapping?
I need to keep my control fixed-width, so expanding the width of the control to fit the text is not an option. I also do not want to make the text font smaller.
Not quite sure exactly what you are trying to achieve, but you could do something like this:
<TextBlock Text="Some long text here that should fade out">
<TextBlock.Foreground>
<LinearGradientBrush>
<GradientStop Offset="0" Color="Black"/>
<GradientStop Offset="0.7" Color="Black"/>
<GradientStop Offset="1" Color="Transparent"/>
</LinearGradientBrush>
</TextBlock.Foreground>
</TextBlock>
But your control still needs to be wide enough to accommodate all the text for it to display.
<TextBlock Text="fgdfgfdgfddgfdgdfgfdgfdgd" Width="129" TextWrapping="NoWrap">
<TextBlock.Foreground>
<LinearGradientBrush EndPoint="0.661,0.399" StartPoint="0.008,0.496">
<GradientStop Color="Black" Offset="0"/>
<GradientStop Color="#7F000000" Offset="0.803"/>
<GradientStop Color="#4C0A0909" Offset="0.95"/>
<GradientStop Color="#BF000000" Offset="0.729"/>
<GradientStop Color="#F8000000" Offset="0.699"/>
</LinearGradientBrush>
</TextBlock.Foreground>
</TextBlock>
The trick on the gradient is that even though all colors are all based off black, The fade is achieved through opacity of each gradient by playing with A part of RGBA, in pseudo-code:
GradientStop Color="Black" A=100%
GradientStop Color="Black" A=97% Offset="0.803"
GradientStop Color="Black" A=75% Offset="0.95"
GradientStop Color="Black" A=80% Offset="0.729"
GradientStop Color="Black" A=30% Offset="0.699"
