textpath.py: import texmanager only when required

leejjoon · leejjoon · commit 25b463ca8985 · 2009-09-04T20:20:06.000Z
svn path=/trunk/matplotlib/; revision=7636
diff --git a/examples/pylab_examples/demo_text_path.py b/examples/pylab_examples/demo_text_path.py
@@ -54,6 +54,8 @@ def draw(self, renderer=None):
 
 if 1:
 
+    usetex = plt.rcParams["text.usetex"]
+    
     fig = plt.figure(1)
 
     # EXAMPLE 1
@@ -80,8 +82,14 @@ def draw(self, renderer=None):
 
     # another text
     from matplotlib.patches import PathPatch
-    text_path = TextPath((0, 0), r"\mbox{textpath supports mathtext \& \TeX}",
-                         size=20, usetex=True)
+    if usetex:
+        r = r"\mbox{textpath supports mathtext \& \TeX}"
+    else:
+        r = r"textpath supports mathtext & TeX"
+        
+    text_path = TextPath((0, 0), r,
+                         size=20, usetex=usetex)
+        
     p1 = PathPatch(text_path, ec="w", lw=3, fc="w", alpha=0.9,
                    transform=IdentityTransform())
     p2 = PathPatch(text_path, ec="none", fc="k", 
@@ -111,7 +119,6 @@ def draw(self, renderer=None):
 
     arr = np.arange(256).reshape(1,256)/256.
 
-    usetex = plt.rcParams["text.usetex"]
     if usetex:
         s = r"$\displaystyle\left[\sum_{n=1}^\infty\frac{-e^{i\pi}}{2^n}\right]$!"
     else:
diff --git a/lib/matplotlib/textpath.py b/lib/matplotlib/textpath.py
@@ -9,7 +9,6 @@
 from matplotlib.mathtext import MathTextParser
 
 import matplotlib.dviread as dviread
-from matplotlib.texmanager import TexManager
 
 import numpy as np
 
@@ -31,6 +30,7 @@ def __init__(self):
         from matplotlib.cbook import maxdict
         self._ps_fontd = maxdict(50)
 
+        self._texmanager = None
 
     def _get_font(self, prop):
         """
@@ -243,6 +243,15 @@ def get_glyphs_mathtext(self, prop, s):
         return zip(glyph_ids, xpositions, ypositions, sizes), glyph_map, myrects
 
 
+    def get_texmanager(self):
+        """
+        return the :class:`matplotlib.texmanager.TexManager` instance
+        """
+        if self._texmanager is None:
+            from matplotlib.texmanager import TexManager
+            self._texmanager = TexManager()
+        return self._texmanager
+
 
     def get_glyphs_tex(self, prop, s):
         """
@@ -251,7 +260,7 @@ def get_glyphs_tex(self, prop, s):
 
         # codes are modstly borrowed from pdf backend.
         
-        texmanager = TexManager()
+        texmanager = self.get_texmanager()
 
         if self.tex_font_map is None:
             self.tex_font_map = dviread.PsfontsMap(dviread.find_tex_file('pdftex.map'))
