Package Gnumed :: Package timelinelib :: Package wxgui :: Package components :: Package maincanvas :: Module periodbase |
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# Source Code for Module Gnumed.timelinelib.wxgui.components.maincanvas.periodbase

     1  # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018  Rickard Lindberg, Roger Lindberg
     2  #
     3  # This file is part of Timeline.
     4  #
     5  # Timeline is free software: you can redistribute it and/or modify
     6  # it under the terms of the GNU General Public License as published by
     7  # the Free Software Foundation, either version 3 of the License, or
     8  # (at your option) any later version.
     9  #
    10  # Timeline is distributed in the hope that it will be useful,
    11  # but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  # GNU General Public License for more details.
    14  #
    15  # You should have received a copy of the GNU General Public License
    16  # along with Timeline.  If not, see <http://www.gnu.org/licenses/>.
    17
    18
    19  from timelinelib.canvas.data import TimePeriod
    20  from timelinelib.wxgui.components.maincanvas.scrollbase import ScrollViewInputHandler
    21
    22
    23 -class SelectPeriodByDragInputHandler(ScrollViewInputHandler):
    24
    25 -    def __init__(self, state, timeline_canvas, initial_time):
    26          ScrollViewInputHandler.__init__(self, timeline_canvas)
    27          self._state = state
    28          self.timeline_canvas = timeline_canvas
    29          self.initial_time = initial_time
    30          self.last_valid_time = initial_time
    31          self.current_time = initial_time
    32
    33 -    def mouse_moved(self, cursor, keyboard):
    34          ScrollViewInputHandler.mouse_moved(self, cursor, keyboard)
    35          self._move_current_time()
    36
    37 -    def view_scrolled(self):
    38          self._move_current_time()
    39
    40 -    def _move_current_time(self):
    41          try:
    42              self.current_time = self.timeline_canvas.GetTimeAt(self.last_x)
    43              period = self.get_current_period()
    44              self.last_valid_time = self.current_time
    45          except ValueError:
    46              period = self.get_last_valid_period()
    47          self.timeline_canvas.SetPeriodSelection(period)
    48
    49 -    def get_last_valid_period(self):
    50          return self._get_period(self.initial_time, self.last_valid_time)
    51
    52 -    def get_current_period(self):
    53          return self._get_period(self.initial_time, self.current_time)
    54
    55 -    def _get_period(self, t1, t2):
    56          if t1 > t2:
    57              start = t2
    58              end = t1
    59          else:
    60              start = t1
    61              end = t2
    62          return TimePeriod(
    63              self.timeline_canvas.Snap(start),
    64              self.timeline_canvas.Snap(end))
    65
    66 -    def left_mouse_up(self):
    67          ScrollViewInputHandler.left_mouse_up(self)
    68          self._end_action()
    69
    70 -    def _end_action(self):
    71          self.end_action()
    72          self._remove_selection()
    73          self._state.change_to_no_op()
    74          self._state.edit_ends()
    75
    76 -    def _remove_selection(self):
    77          self.timeline_canvas.SetPeriodSelection(None)
    78
    79 -    def end_action(self):
    80          raise Exception("end_action not implemented in subclass.")
    81