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Embedding Python into Xaml

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I took a slightly different tack than Chris on embedding Python into Script.  I created an attached property, with the idea that I could set a piece of script "on" an element, giving it some scope.  For example, I got this to work:

<

Button Name="Button1" Content="Button1" Grid.Column="0" Grid.Row="1"

      Pythalon:PythonScript.Script ="Target.Click += lambda *args:MessageBox.Show('Hello')">

</

Button>

But to do real Python programming, I need to be able to set a multi-line script. Should be easy enough...just use Property Element syntax:

<Button Name="Button1" Content="Button1" Grid.Column="0" Grid.Row="1"

<Pythalon:PythonScript.Script>

def onClick(*args):

MessageBox.Show('Hello Again')

Target.Click += onClick

</Pythalon:PythonScript.Script>

</Button>

However, when I ran this code....I got a Python parsing error. The Xaml parser had removed the new lines in the code, so Python saw something like:

def onClick(*args): MessageBox.Show('Hello Again') Target.Click += onClick

Chris had warned me about this issue, and I knew the solution. Add an xml:space="preserve" attribute.

Unfortunately, the Xaml parser doesn't handle this. I got a message warning me that I couldn't set properties on Property Elements. Oops. I reported the bug...but now I'm kinda stuck. Chris's approach works because he derives from Framework element instead of attaching a property.

Comments

  • Anonymous
    May 23, 2005
    I am excited to announce that the Beta1 Release Candidate (that means all-but-final) build of Avalon...