On Tue, Jan 20, 2009 at 7:17 AM, Michael Droettboom <md...@stsci.edu> wrote: > My understanding is that that behavior is deliberate. If the tick > labels are changed to something completely arbitrary, how can the > toolbar know what to display? > > Mike > > Michael Dovrat wrote: >> I have noticed that in the NavigationToolbar2QT there is a small >> display of x,y coordinates at the rightmost corner of the toolbar. >> >> However, when using Axes.set_ticklabels, for example, to normalize >> through the labels and not through the data itself or to make a >> reciprocal scale - set locations and labels, the display of >> coordinates is lost. >> >> I have attached the example "embedding in qt4" with minimal additions >> to show this. >> Notice how the x coordinate is still alive in the bottom toolbar, >> while the y coordinate isn't. >> >> I haven't found any way in the documentation to tell the navigation >> toolbar anything related to this change. >> >> This isn't crucial in any way, just a pity that it is not working >> properly.
There are some cases where we could be smarter about this, notably the case you mention and when we are using date formatters. The essence of the problem is that mpl uses the matplotlib.ticker.Formatter instance, the thing that converts values to strings for the tick locations, for the navigation toolbar. When you specify fixed labels, we use a special Formatter to convert those locations to the specified strings. If you mouse over a region where there is a tick, you will probably see the toolbar flash the tick label. The easiest workaround is to set the fmt_xdata and fmt_ydata attributes of the axes. Eg:: ax.fmt_xdata = lambda x: '%1.4f'%x Then your toolbar will format the x location with 4 digits of precision. JDH ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
