added axes position hist patch

svn path=/trunk/matplotlib/; revision=1749

Author: jdh2358

CHANGELOG

@@ -1,5 +1,7 @@
 New entries should be added at the top
 
+2005-09-13 Added Mark's axes positions history patch #1286915 
+
 2005-09-09 Added support for auto canvas resizing with
            fig.set_figsize_inches(9,5,forward=True) # inches
            OR

TODO

@@ -722,4 +722,8 @@ ZeroDivisionError: SeparableTransformation::eval_scalars yin interval is zero; c
 
 -- tex system call problem
 
--- tex rendering looks fuzzy (dvipng version or flag problem)
+-- tex rendering looks fuzzy (dvipng version or flag problem)
+
+-- Martin's zoomhist bug
+
+-- restore robert leftwich's tutorial link to FAQ

lib/matplotlib/__init__.py

@@ -275,8 +275,32 @@ def ge(self, level):
 
 verbose=Verbose('silent')
 
-
 def _get_home():
+    """Find user's home directory if possible.
+    Otherwise raise error.
+
+    :see:  http://mail.python.org/pipermail/python-list/2005-February/263921.html
+    """
+    path=''
+    try:
+        path=os.path.expanduser("~")
+    except:
+        pass
+    if not os.path.isdir(path):
+        for evar in ('HOME', 'USERPROFILE', 'TMP'):
+            try:
+                path = os.environ[evar]
+                if os.path.isdir(path):
+                    break
+            except: pass
+    if path:
+        return path
+    else:
+        raise RuntimeError('please define environment variable $HOME')
+
+
+
+def _old_get_home():  #ignore me
     """Return the closest possible equivalent to a 'home' directory.
 
     We first try $HOME.  Absent that, on NT it's USERPROFILE if

lib/matplotlib/backend_bases.py

@@ -970,6 +970,7 @@ def __init__(self, canvas):
 
         # a dict from axes index to a list of view limits
         self._views = Stack()
+        self._positions = Stack()  # stack of subplot positions
         self._xypress = None  # the  location and axis info at the time of the press
         self._idPress = None
         self._idRelease = None
@@ -989,6 +990,7 @@ def set_message(self, s):
     def back(self, *args):
         'move back up the view lim stack'
         self._views.back()
+        self._positions.back()
         self.set_history_buttons()
         self._update_view()
 
@@ -1002,12 +1004,14 @@ def draw_rubberband(self, event, x0, y0, x1, y1):
     def forward(self, *args):
         'move forward in the view lim stack'
         self._views.forward()
+        self._positions.forward()
         self.set_history_buttons()
         self._update_view()
 
     def home(self, *args):
         'restore the original view'
         self._views.home()
+        self._positions.home()
         self.set_history_buttons()
         self._update_view()
 
@@ -1150,13 +1154,15 @@ def press_zoom(self, event):
         self.press(event)
 
     def push_current(self):
-        'push the current view limits onto the stack'
-        lims = []
+        'push the current view limits and position onto the stack'
+        lims = []; pos = []
         for a in self.canvas.figure.get_axes():
             xmin, xmax = a.get_xlim()
             ymin, ymax = a.get_ylim()
             lims.append( (xmin, xmax, ymin, ymax) )
+            pos.append( tuple( a.get_position() ) )
         self._views.push(lims)
+        self._positions.push(pos)
         self.set_history_buttons()
 
 
@@ -1353,14 +1359,17 @@ def draw(self):
 
 
     def _update_view(self):
-        'update the viewlim from the view stack for each axes'
+        'update the viewlim and position from the view and position stack for each axes'
 
         lims = self._views()
         if lims is None:  return
+        pos = self._positions()
+        if pos is None: return
         for i, a in enumerate(self.canvas.figure.get_axes()):
             xmin, xmax, ymin, ymax = lims[i]
             a.set_xlim((xmin, xmax))
             a.set_ylim((ymin, ymax))
+            a.set_position( pos[i] )
 
         self.draw()
 
@@ -1379,6 +1388,7 @@ def set_cursor(self, cursor):
     def update(self):
         'reset the axes stack'
         self._views.clear()
+        self._positions.clear()
         self.set_history_buttons()
 
     def zoom(self, *args):