Clip the elements of the streamplotset

Closes#391

Author: WeatherGod

examples/streamplot_demo.py

@@ -32,11 +32,14 @@
 fig=plt.figure(figsize=(8,8))
 m=Basemap(projection='cyl',llcrnrlat=lats1[0],llcrnrlon=lons1[0],urcrnrlat=lats1[-1],urcrnrlon=lons1[-1],resolution='i')
 x, y=m(lons,lats)
-m.streamplot(x,y,udat,vdat,color=speed,linewidth=2,density=2,cmap=plt.cm.spectral)
-m.colorbar()
+m.drawmapboundary(fill_color='w')
 m.drawcoastlines()
 m.drawmeridians(np.arange(-120,-60,2),labels=[0,0,0,1])
 m.drawparallels(np.arange(0,30,2),labels=[1,0,0,0])
+
+m.streamplot(x,y,udat,vdat,color=speed,linewidth=2,density=2,cmap=plt.cm.spectral)
+m.colorbar()
+
 plt.title('Hurricane Rita flow field visualized with streamlines',\
 fontsize=13)
 plt.show()

lib/mpl_toolkits/basemap/__init__.py

@@ -3729,7 +3729,8 @@ def streamplot(self, x, y, u, v, *args, **kwargs):
 # set axes limits to fit map region.
 self.set_axes_limits(ax=ax)
 # clip to map limbs
-ret,c=self._cliplimb(ax,ret)
+ret.lines,c=self._cliplimb(ax,ret.lines)
+ret.arrows,c=self._cliplimb(ax,ret.arrows)
 # streamplot arrows not returned in matplotlib 1.1.1, so clip all
 # FancyArrow patches attached to axes instance.
 ifcisnotNone: