[IronPython] can't override LayoutEngine property

Dino Viehland dinov at exchange.microsoft.com
Thu Apr 26 20:04:08 CEST 2007


I believe currently you need to do:

                @property
                def get_MyLayoutEngine(self): return mle

to get the get_ method to override this.  A couple of people have ran into this and we don't seem to have a bug on it so I've opened bug #9902 (http://www.codeplex.com/IronPython/WorkItem/View.aspx?WorkItemId=9902) to make this more intuitive.

From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Jonathan Amsterdam
Sent: Thursday, April 26, 2007 8:23 AM
To: users at lists.ironpython.com
Subject: [IronPython] can't override LayoutEngine property

I'm trying to overrride the LayoutEngine property of Control so I can implement my own layout engine. I find that this doesn't work in IP. Accessing the LayoutEngine property in IP works fine, but it doesn't work from C#.

//////////////////// C# code:

   public class MyCSharpClass
    {
        public static LayoutEngine getLayoutEngine(Panel p)
        {
            return p.LayoutEngine;
        }
    }

//////////////////// Python code:

class MyLayoutEngine(LayoutEngine):
    def Layout(self, parent, eventArgs):
        pass

mle = MyLayoutEngine()

class MyPanel(Panel):
    LayoutEngine = property(lambda self: mle)

p = MyPanel()
print "from Python:", p.LayoutEngine
print "from C#:", MyCSharpClass.getLayoutEngine(p)

//////////////////// output:
from Python: <MyLayoutEngine object at 0x000000000000002B>
from C#: System.Windows.Forms.Layout.DefaultLayout



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