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|
# (C) Copyright 2007-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
# -----------------------------------------------------------------------------
# Copyright (c) 2007, Riverbank Computing Limited
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#
# Author: Riverbank Computing Limited
# Description: <Enthought undo package component>
# -----------------------------------------------------------------------------
# Enthought library imports.
from traits.api import Instance, Int, Str
from pyface.undo.api import AbstractCommand
# Local imports.
from model import Label
class LabelIncrementSizeCommand(AbstractCommand):
""" The LabelIncrementSizeCommand class is a command that increases the
size of a label's text. This command will merge multiple increments
togther.
"""
#### 'ICommand' interface #################################################
# The data being operated on.
data = Instance(Label)
# The name of the command.
name = Str("&Increment size")
#### Private interface ####################################################
_incremented_by = Int()
###########################################################################
# 'ICommand' interface.
###########################################################################
def do(self):
self.data.increment_size(1)
self._incremented_by = 1
def merge(self, other):
# We can merge if the other command is the same type (or a sub-type).
if isinstance(other, type(self)):
self._incremented_by += 1
merged = True
else:
merged = False
return merged
def redo(self):
self.data.increment_size(self._incremented_by)
def undo(self):
self.data.decrement_size(self._incremented_by)
class LabelDecrementSizeCommand(AbstractCommand):
""" The LabelDecrementSizeCommand class is a command that decreases the
size of a label's text. This command will merge multiple decrements
togther.
"""
#### 'ICommand' interface #################################################
# The data being operated on.
data = Instance(Label)
# The name of the command.
name = Str("&Decrement size")
#### Private interface ####################################################
_decremented_by = Int()
###########################################################################
# 'ICommand' interface.
###########################################################################
def do(self):
self.data.decrement_size(1)
self._decremented_by = 1
def merge(self, other):
# We can merge if the other command is the same type (or a sub-type).
if isinstance(other, type(self)):
self._decremented_by += 1
merged = True
else:
merged = False
return merged
def redo(self):
self.data.decrement_size(self._decremented_by)
def undo(self):
self.data.increment_size(self._decremented_by)
class LabelNormalFontCommand(AbstractCommand):
""" The LabelNormalFontCommand class is a command that sets a normal font
for a label's text.
"""
#### 'ICommand' interface #################################################
# The data being operated on.
data = Instance(Label)
# The name of the command.
name = Str("&Normal font")
###########################################################################
# 'ICommand' interface.
###########################################################################
def do(self):
# Save the old value.
self._saved = self.data.style
# Calling redo() is a convenient way to update the model now that the
# old value is saved.
self.redo()
def redo(self):
self.data.style = 'normal'
def undo(self):
self.data.style = self._saved
class LabelBoldFontCommand(AbstractCommand):
""" The LabelNormalFontCommand class is a command that sets a bold font for
a label's text.
"""
#### 'ICommand' interface #############################################
# The data being operated on.
data = Instance(Label)
# The name of the command.
name = Str("&Bold font")
###########################################################################
# 'ICommand' interface.
###########################################################################
def do(self):
# Save the old value.
self._saved = self.data.style
# Calling redo() is a convenient way to update the model now that the
# old value is saved.
self.redo()
def redo(self):
self.data.style = 'bold'
def undo(self):
self.data.style = self._saved
class LabelItalicFontCommand(AbstractCommand):
""" The LabelNormalFontCommand class is a command that sets an italic font
for a label's text.
"""
#### 'ICommand' interface #################################################
# The data being operated on.
data = Instance(Label)
# The name of the command.
name = Str("&Italic font")
###########################################################################
# 'ICommand' interface.
###########################################################################
def do(self):
# Save the old value.
self._saved = self.data.style
# Calling redo() is a convenient way to update the model now that the
# old value is saved.
self.redo()
def redo(self):
self.data.style = 'italic'
def undo(self):
self.data.style = self._saved
|
