Source code for timelinelib.wxgui.components.maincanvas.noop
# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Rickard Lindberg, Roger Lindberg
#
# This file is part of Timeline.
#
# Timeline is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Timeline is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Timeline. If not, see <http://www.gnu.org/licenses/>.
from timelinelib.wxgui.components.maincanvas.inputhandler import InputHandler
from timelinelib.general.methodcontainer import MethodContainer
from timelinelib.wxgui.keyboard import Keyboard
"""
A NoOpInputHandler gets messages about the start of a user input, such as a
mouse move action, and delegates the workload to fulfill the user action, to
another event handler
"""
[docs]class NoOpInputHandler(InputHandler):
[docs] def __init__(self, state, timeline_canvas):
InputHandler.__init__(self, timeline_canvas)
self._state = state
[docs] def left_mouse_down(self, cursor, keyboard):
def toggle_balloon_stickyness():
event_with_balloon = self._canvas.GetBalloonAt(cursor)
if event_with_balloon:
self._canvas.toggle_balloon_stickyness(event_with_balloon)
def event_at_cursor():
return self._canvas.GetEventAt(cursor, keyboard.alt)
toggle_balloon_stickyness()
event = event_at_cursor()
if event:
self._left_mouse_down_on_event(self._state, event, cursor, keyboard)
else:
self._left_mouse_down_on_timeline(self._state, cursor, keyboard)
def _left_mouse_down_on_event(self, state, event, cursor, keyboard):
def hit_resize_handle():
return self._canvas.hit_resize_handle(cursor, keyboard)
def is_resize_command():
return hit_resize_handle() is not None
def hit_move_handle():
return self._canvas.hit_move_handle(cursor)
def is_move_command():
if event.get_ends_today():
return False
else:
return hit_move_handle()
def start_event_action(action_method, action_arg):
if state.ok_to_edit():
try:
action_method(event, action_arg)
except:
state.edit_ends()
raise
def resize_event():
start_event_action(state.change_to_resize_by_drag, hit_resize_handle())
def move_event():
start_event_action(state.change_to_move_by_drag, self._canvas.GetTimeAt(cursor.x))
def toggle_event_selection():
self._canvas.toggle_event_selection(cursor, keyboard)
methods = MethodContainer(
[
(is_resize_command(), resize_event),
(is_move_command(), move_event)
],
default_method=toggle_event_selection)
methods.select(True)()
def _left_mouse_down_on_timeline(self, state, cursor, keyboard):
def scroll():
state.change_to_scroll_by_drag(cursor)
def create_event():
self._canvas.ClearSelectedEvents()
state.change_to_create_period_event_by_drag(cursor)
def zoom():
self._canvas.ClearSelectedEvents()
state.change_to_zoom_by_drag(cursor)
def select():
state.change_to_select(cursor)
methods = MethodContainer(
[
(Keyboard.NONE, scroll),
(Keyboard.SHIFT, zoom),
(Keyboard.CTRL, create_event),
(Keyboard.SHIFT | Keyboard.CTRL, select),
])
methods.select(keyboard.keys_combination)()