[Chimera-users] matching scale for different sessions

[Thomas Goddard]

Hi Jinghua,

  I made a couple corrections to the code I sent in the previous email
so that if the command arguments are incorrect an error message is properly
reported.

	Tom

---
zoom/ChimeraExtension.py follows:

# ---------------------------------------------------------------------------
# The status line and command entry box at the bottom of the main Chimera
# window prevent the window from being resized by this code to a width
# smaller than about 450 pixels.  The status line can be turned off using
# Favorites / Preferences / Messages / Show status line, and the command-line
# can be hidden with Tools / Command-line / hide.  Commands can still be
# typed with the command-line hidden.
#
def set_window_size(cmd_name, args):

  try:
    width, height = map(int, args.split())
  except:
    from Midas import MidasError
    raise MidasError, 'Syntax error: %s <width-in-pixels> <height-in-pixels>' % cmd_name

  import chimera
  v = chimera.viewer
  v.windowSize = (width, height)

  #
  # If user resizes the main window by hand the above size will not take
  # effect unless we reset top level geometry.
  #
  from chimera import tkgui
  app = tkgui.app
  top = app.winfo_toplevel()
  top.wm_geometry('')

# ---------------------------------------------------------------------------
#
def set_camera_zoom(cmd_name, args):

  try:
    pixels_per_angstrom = float(args)
  except:
    from Midas import MidasError
    raise MidasError, 'Syntax error: %s <pixels-per-angstrom>' % cmd_name

  import chimera
  have_bbox, bbox = chimera.openModels.bbox()
  if not have_bbox:
    return

  v = chimera.viewer

  width, height = v.windowSize        # window size in pixels
  min_size = min(width,height)
  r = .5 * min_size / pixels_per_angstrom
    
  v.viewSize = r
  v.scaleFactor = 1
  v.camera.focal = bbox.center().z

# ---------------------------------------------------------------------------
#
import Midas.midas_text
Midas.midas_text.addCommand('windowsize', set_window_size)
Midas.midas_text.addCommand('setzoom', set_camera_zoom)