On Thu, Jul 17, 2008 at 09:44:48PM +0200, David M. Kaplan wrote:
> Another option would be to create a start_event_loop function like Paul
> suggested and overload that function in those backends that aren't
> interactive so that it returns an error, but this requires writing one
> such function for each non-interactive backend.
Either create a deeper hierarchy:
FigureCanvasBase:
def start_event_loop(self, ...):
raise NotImplemented
FigureCanvasInteractive:
def start_event_loop(self, ...):
generic interactive using time.sleep
MyInteractiveBackend(FigureCanvasInteractive):
def start_event_loop(self, ...):
specialized interactive code using GUI
or a mix-in class:
FigureCanvasBase:
def start_event_loop(self, ...):
raise NotImplemented
FigureCanvasEventLoopMixin:
def start_event_loop(self, ...):
generic interactive using time.sleep
MyInteractiveBackend(FigureCanvasBase,FigureCanvasEventLoopMixin):
... no start_event_loop since using the generic mixin ...
I prefer the latter, particularly since it won't be needed once the
existing interactive backends are implemented.
> Also, is there any case
> where an event loop would be useful for a graphically non-interactive
> backend? If so, this would again mean that this problem would be easier
> to deal with once in the Blocking* classes.
No reason to. While you could prompt for graph coordinates at the
command line on a call to ginput, you could also simply prompt for
the coordinates without bothering with ginput.
- Paul
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