'f' key (focus shift) causes exception when using mayavi2

[Bryce Ready]

Normally, you can press 'f' while focused on a mayavi window and then click to change the focus point (the point about which rotations occur). However, when I do that in my version (see attached data added by ubuntu-bug), I get an uncaught exception:

ipython -wthread

In [1]: from mayavi import mlab
In [2]: mlab.figure(bgcolor=(0.5,0.5,0.5))
In [3]: mlab.points3d(0,0,0,color=(1,0,0))
In [4]: ---------------------------------------------------------------------------
TypeError Traceback (most recent call last)

/usr/lib/python2.7/dist-packages/tvtk/pyface/ui/wx/scene.pyc in OnKeyUp(self, event)
    482 x = event.GetX()
    483 y = self._vtk_control.GetSize()[1] - event.GetY()
--> 484 data = self.picker.pick_world(x, y)
    485 coord = data.coordinate
    486 if coord is not None:

/usr/lib/python2.7/dist-packages/tvtk/pyface/picker.pyc in pick_world(self, x, y)
    376
    377 # Use the cell picker to get the data that needs to be probed.

--> 378 self.cellpicker.pick( (float(x), float(y), 0.0), self.renwin.renderer)
    379
    380 wp = self.worldpicker

/usr/lib/python2.7/dist-packages/tvtk/tvtk_classes.zip/tvtk_classes/abstract_picker.py in pick(self, *args)
    151 """
    152 my_args = [deref_vtk(x) for x in args]
--> 153 ret = self._wrap_call(self._vtk_obj.Pick, *my_args)
    154 return ret
    155

/usr/lib/python2.7/dist-packages/tvtk/tvtk_base.pyc in _wrap_call(self, vtk_method, *args)
    521 self._in_set += 1
    522 mtime = self._wrapped_mtime(vtk_obj) + 1
--> 523 ret = vtk_method(*args)
    524 self._in_set -= 1
    525 if self._wrapped_mtime(vtk_obj) > mtime:

TypeError: function takes exactly 4 arguments (2 given)

The function wrapped here was given a tuple containing the click coordinates, but expected three individual coordinates.

See /usr/share/pyshared/tvtk/pyface/picker.py. The first few lines of the pick_world functon:

        self.worldpicker.pick((float(x), float(y), 0.0), self.renwin.renderer)

        # Use the cell picker to get the data that needs to be probed.
        self.cellpicker.pick( (float(x), float(y), 0.0), self.renwin.renderer)

If I remove the parentheses, converting the first tuple into a set of three args in the first two lines of that function:

        self.worldpicker.pick(float(x), float(y), 0.0, self.renwin.renderer)

        # Use the cell picker to get the data that needs to be probed.
        self.cellpicker.pick( float(x), float(y), 0.0, self.renwin.renderer)

this problem goes away.

Could this possibly be due to some sort of version mismatch between components (tvtk and mayavi for example)? Or is this just an isolated bug. I don't know.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: mayavi2 4.0.0-1ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic-pae 3.0.13
Uname: Linux 3.0.0-15-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Mon Feb 6 10:12:55 2012
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: mayavi2
UpgradeStatus: No upgrade log present (probably fresh install)