[Python-apps-team] Bug#478870: mayavi2: object editor scrollbars fail to show up, until I resize the pane

[Francesco Poli]

Package: mayavi2
Version: 2.1.1-2
Severity: normal

Hi!

I noticed a little problem with the GUI.

Please note that I've just upgraded mayavi2 from version 2.1.1-2 to
version 2.1.1-2+b1, but I've previously seen the same issue with
version 2.1.1-2.

Let me try to explain the problem.
For instance, we can follow the steps described in the user guide,
section _Parametric surfaces example_ [1]

[1] /usr/share/doc/mayavi2/docs/mayavi/user_guide/html/examples.html#parametric-surfaces-example

Start mayavi2

  $ mayavi2

The main window shows up.

 * from menus, select File -> Load data -> Create Parametric surface
source [2]
 * in the MayaVi pane, click on ParametricSurface

[2] BTW, the user guide should be updated, since there's no  File -> Open
    at present, but  File -> Load data  instead...

The MayaVi object editor pane is populated with controls for the
selected data source.  Since the function tab is too high, a vertical
scrollbar is present, so that I can scroll the content of the tab and
reach the remaining controls.
OK, so far, so good.

 * from menus, select Visualize -> Modules -> Outline
 * in the MayaVi pane, click on Outline

The MayaVi object editor pane is populated with controls for the
selected module.  Since the these controls are too wide, a horizontal
scrollbar should be present... but... wait, where is it?!?
I cannot see the right edges of many controls (e.g.: I see the lowest
possible Opacity value, that is 0.0, but not the highest one, nor
the actual value!).  And there's no scrollbar!

 * resize the MayaVi object editor pane (even of a few pixels)

Wow!  Here's the scrollbar!  Now it's visible and I can scroll the pane
horizontally and learn that the actual Opacity value is 1.0 ...

This looks like a GUI bug: scrollbars should show up as soon as they
are needed, rather than after some resizing action...

I don't know whether this bug is caused by mayavi2 itself or by some
underlying library.  Feel free to reassign the bug to the correct
package, as appropriate.


-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.24-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages mayavi2 depends on:
ii  libc6                        2.7-10      GNU C Library: Shared libraries
ii  python                       2.5.2-1     An interactive high-level object-o
ii  python-central               0.6.6       register and build utility for Pyt
ii  python-enthought-traits      2.0.4-2     Manifest typing and reactive progr
ii  python-enthought-traits-ui   2.0.4-2     User interface related modules for
ii  python-numpy                 1:1.0.4-7   Numerical Python adds a fast array
ii  python-pkg-resources         0.6c8-3     Package Discovery and Resource Acc
ii  python-vtk                   5.0.4-1+b1  Python bindings for VTK
ii  python-wxgtk2.6              2.6.3.2.2-2 wxWidgets Cross-platform C++ GUI t
ii  python2.5                    2.5.2-3     An interactive high-level object-o

mayavi2 recommends no packages.

-- no debconf information