Colorbar

[guiwitz]

This PR adds the possibility to add a colorbar to the plots using the show_colorbar=True option and thus answers the request in issue #12

As all images are scaled between 0-1, indicating the correct pixel values on the scale required to update several coloring functions e.g.

microfilm/microfilm/colorify.py

Line 255 in b1cb839

return image_rescaled, min_max

from the colorify module so that the true min/max pixel values used would not be lost during scaling. That information is now kept as an attribute of the Microimage object:

microfilm/microfilm/microplot.py

Line 128 in b1cb839

microim.image_min_max = image_min_max

Additional minor fixes:

• the random gradient colormap is explained, and the num_colors argument actually used.
• depending on wether a movie is created in a notebook or in a script (e.g. in tests), the canvas size was not recovered correctly (factor x2 in a script). This made the reshaping of the rgb byte string fail. It seems that measuring the canvas dimensions directly from the renderer fixes this problem:

  microfilm/microfilm/microanim.py

  Line 431 in b1cb839

  w,h = map(int, anim_object.fig.canvas.renderer.get_canvas_width_height())