[Xwt.Drawing] EventHandler for Canvas OnDraw ?

[Hywel]

It appears that the only way to handle 'ExposeEvents' (as Gtk# termed
them) is to subclass Canvas and override 'OnDraw' - there seems to be no
equivalent of (for example) :-

Canvas canvas = new Canvas ();
canvas.ExposeEvent += new ExposeEventHandler... etc,

even though this type of construction works for other events such as
BoundsChanged, MouseMoved, etc. Is this a deliberate design decision,
or could the facility be provided? I have a situation (in porting some
code from Gtk#) where adding an event handler in one class which
contains a local Canvas variable (as in the example above) is by far the
easiest approach.

[Lluis Sanchez Gual]

It was a deliberate design decision. If that's a big issue I could add it, although I would prefer not to.

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[Hywel Thomas]

It's no real problem (there are a few ways around it, one of which is to
raise an event in OnDraw), but, digging a bit further, it would appear
that the ExposeEvent as such was removed in the change from Gtk2 to
Gtk3. I was just interested to know why the design decision had been
made. Thanks for your comments.

On 01/05/13 11:30, Lluis Sanchez Gual wrote:
> It was a deliberate design decision. If that's a big issue I could add it, although I would prefer not to.
>

> El 24/04/2013, a las 17:00, Hywel <hywel.w...@gmail.com> escribi�: