Python matplotlib.widgets 模块，CheckButtons() 实例源码

def _draw_proj_checkbox(event, params, draw_current_state=True):
    """Toggle options (projectors) dialog"""
    from matplotlib import widgets
    projs = params['projs']
    # turn on options dialog

    labels = [p['desc'] for p in projs]
    actives = ([p['active'] for p in projs] if draw_current_state else
               [True] * len(params['projs']))

    width = max([len(p['desc']) for p in projs]) / 6.0 + 0.5
    height = len(projs) / 6.0 + 0.5
    fig_proj = figure_nobar(figsize=(width, height))
    fig_proj.canvas.set_window_title('SSP projection vectors')
    params['fig_proj'] = fig_proj  # necessary for proper toggling
    ax_temp = fig_proj.add_axes((0, 0, 1, 1), frameon=False)

    proj_checks = widgets.CheckButtons(ax_temp, labels=labels, actives=actives)
    # change already-applied projectors to red
    for ii, p in enumerate(projs):
        if p['active'] is True:
            for x in proj_checks.lines[ii]:
                x.set_color('r')
    # make minimal size
    # pass key presses from option dialog over

    proj_checks.on_clicked(partial(_toggle_proj, params=params))
    params['proj_checks'] = proj_checks

    # this should work for non-test cases
    try:
        fig_proj.canvas.draw()
        fig_proj.show(warn=False)
    except Exception:
        pass