Hmm, instead of drawing the lines and whatnot, have you considered
making the lines (with the associated elements) and rectangles UIElements
themselves? They would have their own dependency properties, etc, etc, and
then you would add them to the canvas.
Then, in relation to your class, you could just have it listen to the
event handlers for the dependency properties you expose and do something
when the value changes.
For example, for a Line class, you would have a Point1 dependency
property and a Point2 dependency property (maybe, it's up to you) which
expose the endpoints of the line. Then, you could just register to receive
change notifications in your class that you want to receive updates.
--
- Nicholas Paldino [.NET/C# MVP]
-
mv*@spam.guard.caspershouse.com
"Wonko the Sane" <Wonko the
Sa**@nospam.nospamwrote in message
news:F6**********************************@microsof t.com...
Hi All,
I have the following (much-simplified) situation. I have a class, part of
which involves drawing graphics on a Canvas. I may have a number of
instances of these graphics, which may include a line, two rectangles used
as
endpoints, and perhaps a label for the line.
I want to somehow later associate a graphic on the canvas with an instance
of the class. For instance, if the user selects an endpoint and drags it,
I
want to resize the line, and perhaps update some information in a database
based on that resize.
I'm just looking for a graceful way to do this. I have a solution, but it
seems inelegant. Any advice or a pointer to an example would be
appreciated...
Thanks.
