Source code for timelinelib.wxgui.components.maincanvas.periodbase
# 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.canvas.data import TimePeriod
from timelinelib.wxgui.components.maincanvas.scrollbase import ScrollViewInputHandler
[docs]class SelectPeriodByDragInputHandler(ScrollViewInputHandler):
[docs] def __init__(self, state, timeline_canvas, initial_time):
ScrollViewInputHandler.__init__(self, timeline_canvas)
self._state = state
self.timeline_canvas = timeline_canvas
self.initial_time = initial_time
self.last_valid_time = initial_time
self.current_time = initial_time
[docs] def mouse_moved(self, cursor, keyboard):
ScrollViewInputHandler.mouse_moved(self, cursor, keyboard)
self._move_current_time()
def _move_current_time(self):
try:
self.current_time = self.timeline_canvas.GetTimeAt(self.last_x)
period = self.get_current_period()
self.last_valid_time = self.current_time
except ValueError:
period = self.get_last_valid_period()
self.timeline_canvas.SetPeriodSelection(period)
[docs] def get_last_valid_period(self):
return self._get_period(self.initial_time, self.last_valid_time)
def _get_period(self, t1, t2):
if t1 > t2:
start = t2
end = t1
else:
start = t1
end = t2
return TimePeriod(
self.timeline_canvas.Snap(start),
self.timeline_canvas.Snap(end))
def _end_action(self):
self.end_action()
self._remove_selection()
self._state.change_to_no_op()
self._state.edit_ends()
def _remove_selection(self):
self.timeline_canvas.SetPeriodSelection(None)