SF.net SVN: matplotlib:[6910] trunk/matplotlib

[<ry...@us...>]

Revision: 6910
          http://matplotlib.svn.sourceforge.net/matplotlib/?rev=6910&view=rev
Author:   ryanmay
Date:     2009-02-12 21:24:36 +0000 (Thu, 12 Feb 2009)

Log Message:
-----------
Merged revisions 6906-6907,6909 via svnmerge from 
https://matplotlib.svn.sourceforge.net/svnroot/matplotlib/branches/v0_98_5_maint

........
  r6906 | ryanmay | 2009-02-12 14:05:10 -0600 (Thu, 12 Feb 2009) | 1 line
  
  Add a demo for getting notified of an Axes' change in view limits.
........
  r6907 | ryanmay | 2009-02-12 14:06:50 -0600 (Thu, 12 Feb 2009) | 1 line
  
  Remove trailing whitespace.
........
  r6909 | ryanmay | 2009-02-12 15:20:09 -0600 (Thu, 12 Feb 2009) | 1 line
  
  Make viewlims demo more interesting by using events to regenerate a fractal.
........

Modified Paths:
--------------
    trunk/matplotlib/doc/users/event_handling.rst

Added Paths:
-----------
    trunk/matplotlib/examples/event_handling/viewlims.py

Property Changed:
----------------
    trunk/matplotlib/


Property changes on: trunk/matplotlib
___________________________________________________________________
Modified: svnmerge-integrated
   - /branches/v0_91_maint:1-6428 /branches/v0_98_5_maint:1-6892
   + /branches/v0_91_maint:1-6428 /branches/v0_98_5_maint:1-6909
Modified: svn:mergeinfo
   - /branches/v0_91_maint:5753-5771
/branches/v0_98_5_maint:6581,6585,6587,6589-6609,6614,6616,6625,6652,6660-6662,6672-6673,6714-6715,6717-6732,6752-6754,6761-6773,6781,6792,6800,6802,6805,6809,6811,6822,6827,6850,6854,6856,6859,6861-6873,6883-6884,6886,6890-6891
   + /branches/v0_91_maint:5753-5771
/branches/v0_98_5_maint:6581,6585,6587,6589-6609,6614,6616,6625,6652,6660-6662,6672-6673,6714-6715,6717-6732,6752-6754,6761-6773,6781,6792,6800,6802,6805,6809,6811,6822,6827,6850,6854,6856,6859,6861-6873,6883-6884,6886,6890-6891,6906-6909

Modified: trunk/matplotlib/doc/users/event_handling.rst
===================================================================
--- trunk/matplotlib/doc/users/event_handling.rst	2009-02-12 21:20:09 UTC (rev 6909)
+++ trunk/matplotlib/doc/users/event_handling.rst	2009-02-12 21:24:36 UTC (rev 6910)
@@ -552,11 +552,4 @@
 
     fig.canvas.mpl_connect('pick_event', onpick)
 
-    plt.show()
-
-
-
-
-
-
-
+    plt.show()

Copied: trunk/matplotlib/examples/event_handling/viewlims.py (from rev 6909, branches/v0_98_5_maint/examples/event_handling/viewlims.py)
===================================================================
--- trunk/matplotlib/examples/event_handling/viewlims.py	                        (rev 0)
+++ trunk/matplotlib/examples/event_handling/viewlims.py	2009-02-12 21:24:36 UTC (rev 6910)
@@ -0,0 +1,79 @@
+# Creates two identical panels.  Zooming in on the right panel will show
+# a rectangle in the first panel, denoting the zoomed region.
+import numpy as np
+import matplotlib.pyplot as plt
+from matplotlib.patches import Rectangle
+
+# We just subclass Rectangle so that it can be called with an Axes
+# instance, causing the rectangle to update its shape to match the
+# bounds of the Axes
+class UpdatingRect(Rectangle):
+    def __call__(self, ax):
+        self.set_bounds(*ax.viewLim.bounds)
+        ax.figure.canvas.draw_idle()
+
+# A class that will regenerate a fractal set as we zoom in, so that you
+# can actually see the increasing detail.  A box in the left panel will show
+# the area to which we are zoomed.
+class MandlebrotDisplay(object):
+    def __init__(self, h=500, w=500, niter=50, radius=2., power=2):
+        self.height = h
+        self.width = w
+        self.niter = niter
+        self.radius = radius
+        self.power = power
+
+    def __call__(self, xstart, xend, ystart, yend):
+        self.x = np.linspace(xstart, xend, self.width)
+        self.y = np.linspace(ystart, yend, self.height).reshape(-1,1)
+        c = self.x + 1.0j * self.y
+        threshold_time = np.zeros((self.height, self.width))
+        z = np.zeros(threshold_time.shape, dtype=np.complex)
+        mask = np.ones(threshold_time.shape, dtype=np.bool)
+        for i in xrange(self.niter):
+            z[mask] = z[mask]**self.power + c[mask]
+            mask = (np.abs(z) < self.radius)
+            threshold_time += mask
+        return threshold_time
+
+    def ax_update(self, ax):
+        ax.set_autoscale_on(False) # Otherwise, infinite loop
+
+        #Get the number of points from the number of pixels in the window
+        dims = ax.axesFrame.get_window_extent().bounds
+        self.width = int(dims[2] + 0.5)
+        self.height = int(dims[2] + 0.5)
+
+        #Get the range for the new area
+        xstart,ystart,xdelta,ydelta = ax.viewLim.bounds
+        xend = xstart + xdelta
+        yend = ystart + ydelta
+
+        # Update the image object with our new data and extent
+        im = ax.images[-1]
+        im.set_data(self.__call__(xstart, xend, ystart, yend))
+        im.set_extent((xstart, xend, ystart, yend))
+        ax.figure.canvas.draw_idle()
+
+md = MandlebrotDisplay()
+Z = md(-2., 0.5, -1.25, 1.25)
+
+fig = plt.figure()
+ax1 = fig.add_subplot(1, 2, 1)
+ax1.imshow(Z, origin='lower', extent=(md.x.min(), md.x.max(), md.y.min(), md.y.max()))
+
+ax2 = fig.add_subplot(1, 2, 2)
+ax2.imshow(Z, origin='lower', extent=(md.x.min(), md.x.max(), md.y.min(), md.y.max()))
+
+rect = UpdatingRect([0, 0], 0, 0, facecolor='None', edgecolor='black')
+rect.set_bounds(*ax2.viewLim.bounds)
+ax1.add_patch(rect)
+
+# Connect for changing the view limits
+ax2.callbacks.connect('xlim_changed', rect)
+ax2.callbacks.connect('ylim_changed', rect)
+
+ax2.callbacks.connect('xlim_changed', md.ax_update)
+ax2.callbacks.connect('ylim_changed', md.ax_update)
+
+plt.show()


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