/
task_toggle_group.py
128 lines (93 loc) · 3.94 KB
/
task_toggle_group.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
# (C) Copyright 2005-2020 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!
from pyface.action.api import Action, ActionItem, Group
from traits.api import Any, List, Instance, Property, Str, on_trait_change
from pyface.tasks.task import Task
from pyface.tasks.task_window import TaskWindow
class TaskToggleAction(Action):
""" An action for activating a task.
"""
# 'Action' interface ---------------------------------------------------
#: The user-visible name of the action, matches the task name.
name = Property(Str, depends_on="task.name")
#: The action is a toggle menu item.
style = "toggle"
#: The tooltip to display for the menu item.
tooltip = Property(Str, depends_on="name")
# 'TaskActivateAction' interface ---------------------------------------
task = Instance(Task)
# ------------------------------------------------------------------------
# 'Action' interface.
# ------------------------------------------------------------------------
def destroy(self):
super(TaskToggleAction, self).destroy()
# Make sure that we are not listening to changes in the task anymore
# In traits style, we will set the basic object to None and have the
# listener check that if it is still there.
self.task = None
def perform(self, event=None):
window = self.task.window
window.activate_task(self.task)
# ------------------------------------------------------------------------
# Private interface.
# ------------------------------------------------------------------------
def _get_name(self):
if self.task is None:
return "UNDEFINED"
return self.task.name
def _get_tooltip(self):
return "Switch to the %s task." % self.name
@on_trait_change("task.window.active_task")
def _update_checked(self):
if self.task:
window = self.task.window
self.checked = (
window is not None and window.active_task == self.task
)
class TaskToggleGroup(Group):
""" A menu for changing the active task in a task window.
"""
# 'ActionManager' interface --------------------------------------------
id = "TaskToggleGroup"
items = List()
# 'TaskChangeMenuManager' interface ------------------------------------
# The ActionManager to which the group belongs.
manager = Any()
# The window that contains the group.
window = Instance(TaskWindow)
# ------------------------------------------------------------------------
# Private interface.
# ------------------------------------------------------------------------
def _get_items(self):
items = []
if len(self.window.tasks) > 1:
# at least two tasks, so something to toggle
items = [
ActionItem(action=TaskToggleAction(task=task))
for task in self.window.tasks
]
return items
def _rebuild(self):
# Clear out the old group, then build the new one.
self.destroy()
self.items = self._get_items()
# Inform our manager that it needs to be rebuilt.
self.manager.changed = True
# Trait initializers ---------------------------------------------------
def _items_default(self):
self.window.on_trait_change(self._rebuild, "tasks[]")
return self._get_items()
def _manager_default(self):
manager = self
while isinstance(manager, Group):
manager = manager.parent
return manager
def _window_default(self):
return self.manager.controller.task.window