# AUTOMATED VIEWER FRAME HANDLES
# Add this code to the Menu.py file in your .nuke directory

# This code adds commands for 24, 12, and 8 frame handles.
# If you don't need all of them, you can delete the function
# and nuke.menu addCommand for that frame range.


# 24 Frame Handles

def newViewerRange24():
  # Get the node that is the current viewer
  v = nuke.activeViewer().node()
  # Get the first and last frames from the project settings
  firstFrame = nuke.Root()['first_frame'].value()
  lastFrame = nuke.Root()['last_frame'].value()
  # get a string for the new range and set this on the viewer
  newRange = str(int(firstFrame)+24) + '-' + str(int(lastFrame) - 24)
  v['frame_range_lock'].setValue(True)
  v['frame_range'].setValue(newRange)


# 12 Frame Handles

def newViewerRange12():
  # Get the node that is the current viewer
  v = nuke.activeViewer().node()
  # Get the first and last frames from the project settings
  firstFrame = nuke.Root()['first_frame'].value()
  lastFrame = nuke.Root()['last_frame'].value()
  # get a string for the new range and set this on the viewer
  newRange = str(int(firstFrame)+12) + '-' + str(int(lastFrame) - 12)
  v['frame_range_lock'].setValue(True)
  v['frame_range'].setValue(newRange)


# 8 Frame Handles

def newViewerRange8():
  # Get the node that is the current viewer
  v = nuke.activeViewer().node()
  # Get the first and last frames from the project settings
  firstFrame = nuke.Root()['first_frame'].value()
  lastFrame = nuke.Root()['last_frame'].value()
  # get a string for the new range and set this on the viewer
  newRange = str(int(firstFrame)+8) + '-' + str(int(lastFrame) - 8)
  v['frame_range_lock'].setValue(True)
  v['frame_range'].setValue(newRange)

# Adding the commands to the Viewer Menu
viewerbar = nuke.menu("Nuke").findItem("Viewer")
viewerbar.addSeparator()
nuke.menu('Nuke').addCommand('Viewer/Viewer Handles - 24f',
"newViewerRange24()")
nuke.menu('Nuke').addCommand('Viewer/Viewer Handles - 12f',
"newViewerRange12()")
nuke.menu('Nuke').addCommand('Viewer/Viewer Handles - 8f',
"newViewerRange8()")