fix: yscale fixes

Author: andrzejnovak

Diff for: src/mplhep/plot.py

@@ -3,6 +3,7 @@
 import collections.abc
 import inspect
 import warnings
+import logging
 from collections import OrderedDict, namedtuple
 from typing import TYPE_CHECKING, Any, Union
 
@@ -962,6 +963,10 @@ def _draw_leg_bbox(ax):
     """
     fig = ax.figure
     leg = ax.get_legend()
+    if leg is None:
+        leg = [
+            c for c in ax.get_children() if isinstance(c, plt.matplotlib.legend.Legend)
+        ][0]
 
     fig.canvas.draw()
     return leg.get_frame().get_bbox()
@@ -973,6 +978,7 @@ def _draw_text_bbox(ax):
     """
     fig = ax.figure
     textboxes = [k for k in ax.get_children() if isinstance(k, AnchoredText)]
+    fig.canvas.draw()
     if len(textboxes) > 1:
         print("Warning: More than one textbox found")
         for box in textboxes:
@@ -984,15 +990,17 @@ def _draw_text_bbox(ax):
     return bbox
 
 
-def yscale_legend(ax=None):
+def yscale_legend(ax=None, otol=0):
     """
-    Automatically scale y-axis up to fit in legend()
+    Automatically scale y-axis up to fit in legend().
+    Set `otol > 0` for less strict scaling.
     """
     if ax is None:
         ax = plt.gca()
 
     scale_factor = 10 ** (1.05) if ax.get_yscale() == "log" else 1.05
-    while overlap(ax, _draw_leg_bbox(ax)) > 0:
+    while overlap(ax, _draw_leg_bbox(ax)) > otol:
+        logging.info("Scaling y-axis by 5% to fit legend")
         ax.set_ylim(ax.get_ylim()[0], ax.get_ylim()[-1] * scale_factor)
         ax.figure.canvas.draw()
     return ax