Vista - How to get Size of parent in a template

I've created my own Template for a TextBox so I can draw a custom
border.
The initial size of the TextBox I can bind to without problems using
something like

<PathFigure StartPoint="{Binding ElementName=Label, Path=RenderSize,
Converter={StaticResource sizeToPoint}}">

Only problem is: when the size of the TextBox does change for whatever
reason, my custom border's size stays the same. The border does not
reflect the changes of the size of the TextBox.

My guess is I need to get the size in a different way, but I don't know
where to get it. And I can't use Rectangle, or Border to just fill the
border since these two can't draw what I need.

Anyone got an idea how to bind to the size of a control so my template
does grow and shrink with it?

Thanks,
Sam

Hey Sam,

Try binding to ActualHeight and ActualWidth of the TextBox instead
of RenderSize.


Sam Jost wrote:
> I've created my own Template for a TextBox so I can draw a custom
> border.
> The initial size of the TextBox I can bind to without problems using
> something like
>
> <PathFigure StartPoint="{Binding ElementName=Label, Path=RenderSize,
> Converter={StaticResource sizeToPoint}}">
>
> Only problem is: when the size of the TextBox does change for whatever
> reason, my custom border's size stays the same. The border does not
> reflect the changes of the size of the TextBox.
>
> My guess is I need to get the size in a different way, but I don't know
> where to get it. And I can't use Rectangle, or Border to just fill the
> border since these two can't draw what I need.
>
> Anyone got an idea how to bind to the size of a control so my template
> does grow and shrink with it?
>
> Thanks,
> Sam

Suresh,

These two look great! I could bind to ActualWidth or ActualHeight and
all sizes get updated just like I'd like them to.

But how do I bind to both of them at once? Writing a converter is easy,
but in the binding I have to decide for ActualHeight or ActualWidth, I
can't have them both at once

I tried to bind them like

<LineSegment>
<LineSegment.Point>
<Point
X="{Binding RelativeSource={RelativeSource TemplatedParent},
Path=ActualWidth"}"
Y="{Binding RelativeSource={RelativeSource TemplatedParent},
Path=ActualHeight"}"
</LineSegment.Point>
</LineSegment>

but I only get an error message saying I cant attack a binding to the
double 'X'

How do I bind to both at once??

Thanks a lot,
Sam


Suresh schrieb:

> Hey Sam,
>
> Try binding to ActualHeight and ActualWidth of the TextBox instead
> of RenderSize.
>
>
> Sam Jost wrote:
> > I've created my own Template for a TextBox so I can draw a custom
> > border.
> > The initial size of the TextBox I can bind to without problems using
> > something like
> >
> > <PathFigure StartPoint="{Binding ElementName=Label, Path=RenderSize,
> > Converter={StaticResource sizeToPoint}}">
> >
> > Only problem is: when the size of the TextBox does change for whatever
> > reason, my custom border's size stays the same. The border does not
> > reflect the changes of the size of the TextBox.
> >
> > My guess is I need to get the size in a different way, but I don't know
> > where to get it. And I can't use Rectangle, or Border to just fill the
> > border since these two can't draw what I need.
> >
> > Anyone got an idea how to bind to the size of a control so my template
> > does grow and shrink with it?
> >
> > Thanks,
> > Sam