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# Copyright 2005-2007 Nanorex, Inc. See LICENSE file for details.
"""
undo_UI.py - Undo-related main menu commands other than Undo/Redo themselves
@author: bruce
@version: $Id$
@copyright: 2005-2007 Nanorex, Inc. See LICENSE file for details.
History:
bruce 071025 split this out of undo_manager.py
to rationalize import dependencies
TODO:
- general cleanup, especially of comments
WARNING: most comments have not been not reviewed since this code was moved
out of undo_manager.py [as of 071025], so they may be misleadingly out of
context.
"""
from utilities.debug import print_compact_traceback
import foundation.env as env
from utilities.Log import greenmsg, redmsg, _graymsg
from widgets.widget_helpers import PleaseConfirmMsgBox
# ==
def editMakeCheckpoint(win):
"""
This is called from MWsemantics.editMakeCheckpoint,
which is documented as:
"Slot for making a checkpoint (only available when
Automatic Checkpointing is disabled)."
"""
env.history.message( greenmsg("Make Checkpoint"))
# do it
try:
#REVIEW: Should make sure this is correct with or without
# auto-checkpointing enabled, and leaves that setting unchanged.
# (This is not urgent, since in present UI it can't be called
# except when auto-checkpointing is disabled.)
um = win.assy.undo_manager
if um:
um.make_manual_checkpoint()
# no msg needed, was emitted above:
## env.history.message(greenmsg("Make Checkpoint"))
pass
else:
# this should never happen
msg = "Make Checkpoint: error, no undo_manager"
env.history.message(redmsg(msg))
except:
print_compact_traceback("exception caught in editMakeCheckpoint: ")
msg = "Internal error in Make Checkpoint. " \
"Undo/Redo might be unsafe until a new file is opened."
env.history.message(redmsg(msg))
#e that wording assumes we can't open more than one file at a time...
return
def editClearUndoStack(win):
"""
This is called from MWsemantics.editClearUndoStack,
which is documented as:
"Slot for clearing the Undo Stack. Requires the user to confirm."
"""
#bruce 060304, modified from Mark's prototype in MWsemantics
#e the following message should specify the amount of data to be lost...
#e and the menu item text also should
msg = "Please confirm that you want to clear the Undo/Redo Stack.<br>" + \
_graymsg("(This operation cannot be undone.)")
confirmed = PleaseConfirmMsgBox( msg)
# TODO: I bet this needs a "don't show this again" checkbox...
# with a prefs key...
if not confirmed:
env.history.message("Clear Undo Stack: Cancelled.") #k needed??
return
# do it
env.history.message(greenmsg("Clear Undo Stack"))
# no further message needed if it works, I think
try:
##e Note: the following doesn't actually free storage.
# [update, 060309 -- i think as of a few days ago it does try to... ##k]
# Once the UI seems to work, we'll either add that to it,
# or destroy and remake assy.undo_manager itself before doing this
# (and make sure destroying it frees storage).
##e Make sure this can be called with or without auto-checkpointing
# enabled, and leaves that setting unchanged. #####@@@@@
win.assy.clear_undo_stack()
except:
print_compact_traceback("exception in clear_undo_stack: ")
msg = "Internal error in Clear Undo Stack. " \
"Undo/Redo might be unsafe until a new file is opened."
env.history.message(redmsg(msg))
#e that wording assumes we can't open more than one file at a time...
return
# bugs in editClearUndoStack [some fixed as of 060304 1132p PST, removed now]:
# cosmetic:
# + [worked around in this code, for now] '...' needed in menu text;
# - it ought to have ram estimate in menu text;
# - "don't show again" checkbox might be needed
# - does the dialog (or menu item if it doesn't have one) need a wiki help
# link?
# - dialog starts out too narrow
# - when Undo is disabled at the point where stack was cleared, maybe text
# should say it was cleared? "Undo stack cleared (%d.)" ???
# end
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