matplotlib-devel Mailing List for matplotlib

I've added some of the features discussed on this list to the
navigation framework:

  * events now have a key attribute: an ascii char | 'control' |
    'shift' | 'alt'.  I yet haven't exposed key_press_event to
    mpl_connect though this isn't much more work.  I did this
    primarily so I could find out if 'x', 'y' or 'control' were
    pressed during pan/zoom right click events.  As discussed before,
    these three modifiers constrain the interactive zoom to x only, y
    only or proportion constrained.  I also am not currently handling
    key presses with modifiers but this is only a but more work - this
    can wait until key press is exposed through the mpl_connect
    interface.

 * dynamic update - an optional method dynamic_update refreshes the
   canvas during the navigation mouse move event.  

 * rubber banding - a visual rectangle using native drawing for zoom
   to rect.  Optional method is draw_rubberband.

All of the above are implemented in wx* and gtk* in CVS.

The major outstanding issue re navigation is multiple axes selection.
Still ruminating....  

I'd like to get all this wrapped up by next week if possible for 0.61.
There are some fairly important bugs in the last release (notably the
wxagg segfault on window resize) as well as nifty new features since
then (toolbar2, svg fixes, ps mathtext!!) that should be roaming free
in the while rather than caged up in CVS.

JDH

>>>>> "Stefan" == Stefan Kuzminski <pon...@ya...> writes:

    Stefan> Hi, I upgraded to libpng v1.2.5 from v1.0.14.  ( on a
    Stefan> linux box, using Agg backend and matplotlib v0.54.2 ) Now
    Stefan> I get this Runtime error thrown at _backend_agg.cpp line
    Stefan> 948

    Stefan> png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,
    Stefan> NULL, NULL, NULL); if (png_ptr == NULL) { fclose(fp);
    Stefan> throw Py::RuntimeError("could not create write struct");
    Stefan>   }

    Stefan> Has anyone seen this?

I just tried a built both matplotlib 0.54.2 and CVS against
libpng1.2.5 and was able to save an agg png w/o incident.  Make sure
you are not getting old png headers, have a clean matplotlib build,
run ldconfig, etc...

JDH

Hi,

I upgraded to libpng v1.2.5 from v1.0.14.  ( on a linux box, using Agg
backend and matplotlib v0.54.2 )  Now I get this Runtime error thrown
at _backend_agg.cpp line 948

png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL,
NULL);
  if (png_ptr == NULL) {
    fclose(fp);
    throw Py::RuntimeError("could not create write struct");
  }

Has anyone seen this?

thanks,
Stefan


	
		
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>>>>> "Steve" == Steve Chaplin <ste...@ya...> writes:

    Steve> I viewed matplotlib.svg in gqview (on Linux) and it looks
    Steve> like the icon image only uses about two thirds of the svg
    Steve> width and height, so the minimize icon ends up being too
    Steve> small.

Indeed.  I fixed this in CVS (and a number of other fixes for SVG
including some layout problems, image support and font support).

There appears to be a problem with the svg lib gnome uses.  For one
thing, the axes appear black even though the hex code is #ffffff.
This does not happen in mozilla with the adobe plugin or with batik.
It appears GNOME uses the same lib (unsurprisingly) because when I
minimize the figure I also get the black axes background.

JDH

On Tue, 2004-07-27 at 04:36, John Hunter wrote:
> 
> I had the bright idea to use the svg backend to generate the
> minimization icon.  See examples/matplotlib_icon.svg.  It displays
> correctly on my web browser, but not when minimized.  I don't know if
> this reflects a problem in the svg backend, or how gtk handles svg
> icons.
> 
> If we can get this example to work, the next thing to do is connect
> the icon setting to the window minimize event, and set the icon to be
> the svg output of the current figure window!
> 
> JDH
I viewed matplotlib.svg in gqview (on Linux) and it looks like the icon
image only uses about two thirds of the svg width and height, so the
minimize icon ends up being too small.

Steve