Niklas, you were right. Thanks a lot!
I was using a gnuplot module and a quick look at it gave me impression
it did take care of time issues and its method don't return until
gnuplot task if finished. In fact it didn't, but sleep() inserted before
set_from_file() fixed the issue.
That module is not so perfect in other aspects too, so I guess I should
either improve it and send patches back to the author or make a less
general purpose synchronous interface myself. :)
On 01/29/2013 03:28 AM, Niklas Koep wrote:
I've tested the what I described earlier today and it works. If there
are two distinct images on disk, then calling
gtk.Image.set_from_file() will automatically update the image gtk
displays. This leads me to believe that it's a timing issue you're
facing. The plotter.plot() method wouldn't happen to be asynchronous,
would it? Because if it is it might just be the case that you update
the gtk.Image before the entire image generated by gnuplot has been
written to disk. Obviously, that's just a guess since I don't know how
your plot() method works internally. But it would explain why the
first update of your image (sometimes) doesn't take and the image on
disk actually appears correct if you look at it after a certain time.
2013/1/28 Daniil Baturin <[email protected] <mailto:[email protected]>>
I'm using set_from_file(), and it kind of works. The problem is
that the image is updated only second time event handler that
replots and invokes set_from_file() is triggered. I double checked
replot occurs every time event is caught, when I open the image
file manually it contains the updated plot.
I added queue_redraw() after set_from_file(), but it didn't help.
This is what I have there now:
def apply_equations(self, widget, data):
x_equation = data[0].get_text()
y_equation = data[1].get_text()
image = data[2]
print "Equations: x=%s, y=%s" % (x_equation, y_equation)
expression = x_equation + "," + y_equation
plotter.set_expression(expression)
plotter.plot()
image.set_from_file("test.png")
image.queue_draw()
self.equations_apply.connect("clicked", self.apply_equations,
(self.x_expression, self.y_expression, self.image) )
On 01/28/2013 10:02 PM, Niklas Koep wrote:
If you're updating your gtk.Image contents via its
set_from_file() method you don't need to request an update at all
-- it happens automatically. Generally speaking, however,
gtk.Widget implements a queue_draw() method which can be used to
invalidate the entire visible area of a widget which in turn
causes it to be redrawn. For your use this doesn't seem to be
required though. Hope this helps.
2013/1/27 Daniil Baturin <[email protected]
<mailto:[email protected]>>
Hi,
What is the proper way to reload gtk.Image contents?
I want to make a simple educational gnuplot frontend that
would allow playing with parametric curve coefficients by
using spin buttons, expressions with substituted constants
will be passed to gnuplot and generated png displayed in a
gtk.Image. But I'm not sure how to request update of
displayed image if the image has changed.
--
#!/usr/bin/env perl
@a=split(//, "daniil @ baturin . org" );# Daniil Baturin
@b=split(//,q/Px%!+o0Q6lh*7dp$.@8#%|y{/);while($i<24){$_.=
chr((ord(@b[$i])-ord(@a[$i])+62)%94+32);$i++};print"$_\n"#
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--
#!/usr/bin/env perl
@a=split(//, "daniil @ baturin . org" );# Daniil Baturin
@b=split(//,q/Px%!+o0Q6lh*7dp$.@8#%|y{/);while($i<24){$_.=
chr((ord(@b[$i])-ord(@a[$i])+62)%94+32);$i++};print"$_\n"#
_______________________________________________
pygtk mailing list [email protected] <mailto:[email protected]>
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Read the PyGTK FAQ: http://faq.pygtk.org/
--
#!/usr/bin/env perl
@a=split(//, "daniil @ baturin . org" );# Daniil Baturin
@b=split(//,q/Px%!+o0Q6lh*7dp$.@8#%|y{/);while($i<24){$_.=
chr((ord(@b[$i])-ord(@a[$i])+62)%94+32);$i++};print"$_\n"#
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