Merge pull request matplotlib#20430 from anntzer/fad

Improve fancyarrow_demo.

Author: timhoffm

examples/text_labels_and_annotations/fancyarrow_demo.py

@@ -4,8 +4,8 @@
 ================================
 
 Overview of the arrow styles available in `~.Axes.annotate`.
-
 """
+
 import matplotlib.patches as mpatches
 import matplotlib.pyplot as plt
 
@@ -17,27 +17,16 @@
 fig = plt.figure(figsize=(4 * ncol / 1.5, figheight / 1.5))
 fontsize = 0.2 * 70
 
+ax = fig.add_axes([0, 0, 1, 1], frameon=False)
+ax.set(xlim=(0, 4 * ncol), ylim=(0, figheight))
 
-ax = fig.add_axes([0, 0, 1, 1], frameon=False, aspect=1.)
-
-ax.set_xlim(0, 4 * ncol)
-ax.set_ylim(0, figheight)
-
-
-def to_texstring(s):
-    s = s.replace("<", r"$<$")
-    s = s.replace(">", r"$>$")
-    s = s.replace("|", r"$|$")
-    return s
-
-
-for i, (stylename, styleclass) in enumerate(sorted(styles.items())):
+for i, (stylename, styleclass) in enumerate(styles.items()):
     x = 3.2 + (i // nrow) * 4
     y = (figheight - 0.7 - i % nrow)  # /figheight
     p = mpatches.Circle((x, y), 0.2)
     ax.add_patch(p)
 
-    ax.annotate(to_texstring(stylename), (x, y),
+    ax.annotate(stylename, (x, y),
                 (x - 1.2, y),
                 ha="right", va="center",
                 size=fontsize,
@@ -50,9 +39,6 @@ def to_texstring(s):
                                 ),
                 bbox=dict(boxstyle="square", fc="w"))
 
-ax.xaxis.set_visible(False)
-ax.yaxis.set_visible(False)
-
 plt.show()
 
 #############################################################################

lib/matplotlib/patches.py

@@ -3466,28 +3466,6 @@ def transmute(self, path, mutation_size, linewidth):
 
             return p, False
 
-    @_register_style(_style_list, name="]-[")
-    class BracketAB(_Bracket):
-        """An arrow with outward square brackets at both ends."""
-
-        def __init__(self,
-                     widthA=1., lengthA=0.2, angleA=0,
-                     widthB=1., lengthB=0.2, angleB=0):
-            """
-            Parameters
-            ----------
-            widthA, widthB : float, default: 1.0
-                Width of the bracket.
-            lengthA, lengthB : float, default: 0.2
-                Length of the bracket.
-            angleA, angleB : float, default: 0 degrees
-                Orientation of the bracket, as a counterclockwise angle.
-                0 degrees means perpendicular to the line.
-            """
-            super().__init__(True, True,
-                             widthA=widthA, lengthA=lengthA, angleA=angleA,
-                             widthB=widthB, lengthB=lengthB, angleB=angleB)
-
     @_register_style(_style_list, name="]-")
     class BracketA(_Bracket):
         """An arrow with an outward square bracket at its start."""
@@ -3526,6 +3504,28 @@ def __init__(self, widthB=1., lengthB=0.2, angleB=None):
             super().__init__(None, True,
                              widthB=widthB, lengthB=lengthB, angleB=angleB)
 
+    @_register_style(_style_list, name="]-[")
+    class BracketAB(_Bracket):
+        """An arrow with outward square brackets at both ends."""
+
+        def __init__(self,
+                     widthA=1., lengthA=0.2, angleA=0,
+                     widthB=1., lengthB=0.2, angleB=0):
+            """
+            Parameters
+            ----------
+            widthA, widthB : float, default: 1.0
+                Width of the bracket.
+            lengthA, lengthB : float, default: 0.2
+                Length of the bracket.
+            angleA, angleB : float, default: 0 degrees
+                Orientation of the bracket, as a counterclockwise angle.
+                0 degrees means perpendicular to the line.
+            """
+            super().__init__(True, True,
+                             widthA=widthA, lengthA=lengthA, angleA=angleA,
+                             widthB=widthB, lengthB=lengthB, angleB=angleB)
+
     @_register_style(_style_list, name="|-|")
     class BarAB(_Bracket):
         """An arrow with vertical bars ``|`` at both ends."""