Question

I’m new to WPF/XAML & I’m just doing a training exercise at the moment.

I’ve got a noddy application and I want to change the size of the text in a tag based on the position of a scroll bar.

The text is defined by this code:

<FlowDocumentScrollViewer Grid.Row='1'>     <FlowDocument>         <Paragraph>             Text goes here         </Paragraph>     </FlowDocument> </FlowDocumentScrollViewer> 

I’m trying to define a Setter and I’ve got as far as this:

<Style TargetType='{x:Type Paragraph}'>     <Setter Property='FontSize' Value='???' /> </Style> 

But I can’t find out what needs to go in place ‘???’. I’ve tried Googling for the answer to this, but I think I must be using the wrong search terms because I haven’t found the answer yet.

I’m guessing that it’s going to be really obvious, but I’ve got to admit I’m stumped.

Answer 1

You can just set the font size with a binding expression like this:

<Paragraph FontSize='{Binding ElementName=scroll1, Path=Value}' /> <ScrollBar x:Name='scroll1'></ScrollBar> 

What you want to look into is the binding expression syntax, because currently intellisense isn’t supported there.