[sigc] How to get started?
- From: Greg Schussman <schussman slac stanford edu>
- To: libsigc-list gnome org
- Subject: [sigc] How to get started?
- Date: Thu, 19 Jan 2006 16:48:03 -0800
Hi again.
What I'm trying to do is have something which behaves like a double
mutually interact with some slider-like widgets, which may or may not be
presnt.
----------------------
For example, let's say my double like thing is:
MyDouble val.
and my slider like things will be called
window_A.slider_A
and
window_B.slider_B
------------------------------------------
Given val and those sliders, I'd like to initialize val before the
windows are created:
MyDouble val= 5.0;
Then I'd like to create window A and hook up the slider to pay attention
to val:
val.connect(window_A.slider_A);
At this point, slider_A would grab the 5.0 from Val and show that to the
user. If the user messes with slider_A, then val sholud be updated. If
something in the code assigns something new to val, then slider_A should
be updated.
Then if window_B is created and slider_B comes into existence,
val.connect(window_B.slider_B) would be called.
At this point, a user changing slider B should result in updating val.
Updating val should update slider_A. But because slider_B caused the
update in the first place, the update to val shouldn't cause an
unnessesary update to slider_B.
An assignment to val shouldn't care whether any sliders are watching
val. A change to one slider should result in val and the other sliders
(if any) to be updated.
--------------------------------------------------------------------------
My guess is that this sort of thing is what libsigc++ does very well.
But it's not obvious to me how to get started.
1) is this really suited for libsigc++? (If not, any ideas what
might be?)
2) Any hints on how to get started?
Thanks.
Greg
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