Thanks for reporting this.
This is now fixed in the v1.0.x-maint branch and in the master branch.
Regards,
-JJ
On Fri, Sep 16, 2011 at 9:43 AM, Daniel Hyams <dhy...@gmail.com> wrote:
> There seems to be a problem with the draggable annotation code when
> the annotation is just clicked, and not dragged. If you run the
> following code:
>
> import matplotlib.pyplot as plt
> fig = plt.figure()
> ax = fig.add_subplot(111)
> ann = ax.annotate('local max', xy=(2, 1), xytext=(3,
> 1.5),arrowprops=dict(facecolor='black', shrink=0.05))
> ann.draggable()
> ax.set_ylim(-2,2)
> ax.set_xlim(0,5)
> plt.show()
>
> And click (just a single click) the annotation (the words "local
> max"), then resize your window a little to force a redraw. The
> annotation flips to the bottom left corner.
>
> The fix is in offsetbox.py, DraggableAnnotation.save_offset. If you
> add a call to update_offset() as the last call of that routine,
> everything is OK again. I think that finalize_offset is assuming that
> self.annotation.text is in pixels before it starts working with it,
> but when update_offset fails to get called (as the case with a click),
> self.annotation.xytext is still in axes fraction coordinates.
>
> def save_offset(self):
> ann = self.annotation
> x, y = ann.xytext
> if isinstance(ann.textcoords, tuple):
> xcoord, ycoord = ann.textcoords
> x1, y1 = ann._get_xy(self.canvas.renderer, x, y, xcoord)
> x2, y2 = ann._get_xy(self.canvas.renderer, x, y, ycoord)
> ox0, oy0 = x1, y2
> else:
> ox0, oy0 = ann._get_xy(self.canvas.renderer, x, y, ann.textcoords)
>
> self.ox, self.oy = ox0, oy0
> self.annotation.textcoords = "figure pixels"
> self.update_offset(0.0,0.0) # <----------- add this!
>
>
> It might be sufficient to just set self.annotation.xytext to
> self.ox,self.oy instead of calling update_offset like I did above.
>
>
> --
> Daniel Hyams
> dhy...@gmail.com
>
> ------------------------------------------------------------------------------
> BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA
> http://p.sf.net/sfu/rim-devcon-copy2
> _______________________________________________
> Matplotlib-users mailing list
> Matplotlib-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
------------------------------------------------------------------------------
BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA
http://p.sf.net/sfu/rim-devcon-copy2
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
