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

      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.wxgui.components.maincanvas.inputhandler import InputHandler
     20  from timelinelib.general.methodcontainer import MethodContainer
     21  from timelinelib.wxgui.keyboard import Keyboard
     22
     23
     24  """
     25  A NoOpInputHandler gets messages about the start of a user input, such as a
     26  mouse move action, and delegates the workload to fulfill the user action, to
     27  another event handler
     28  """
     29
     30
     31 -class NoOpInputHandler(InputHandler):
     32
     33 -    def __init__(self, state, timeline_canvas):
     34          InputHandler.__init__(self, timeline_canvas)
     35          self._state = state
     36
     37 -    def left_mouse_down(self, cursor, keyboard):
     38
     39          def toggle_balloon_stickyness():
     40              event_with_balloon = self._canvas.GetBalloonAt(cursor)
     41              if event_with_balloon:
     42                  self._canvas.toggle_balloon_stickyness(event_with_balloon)
     43
     44          def event_at_cursor():
     45              return self._canvas.GetEventAt(cursor, keyboard.alt)
     46
     47          toggle_balloon_stickyness()
     48          event = event_at_cursor()
     49          if event:
     50              self._left_mouse_down_on_event(self._state, event, cursor, keyboard)
     51          else:
     52              self._left_mouse_down_on_timeline(self._state, cursor, keyboard)
     53
     54 -    def _left_mouse_down_on_event(self, state, event, cursor, keyboard):
     55
     56          def hit_resize_handle():
     57              return self._canvas.hit_resize_handle(cursor, keyboard)
     58
     59          def is_resize_command():
     60              return hit_resize_handle() is not None
     61
     62          def hit_move_handle():
     63              return self._canvas.hit_move_handle(cursor, keyboard)
     64
     65          def is_move_command():
     66              if event.get_ends_today():
     67                  return False
     68              else:
     69                  return hit_move_handle()
     70
     71          def start_event_action(action_method, action_arg):
     72              if state.ok_to_edit():
     73                  try:
     74                      action_method(event, action_arg)
     75                  except:
     76                      state.edit_ends()
     77                      raise
     78
     79          def resize_event():
     80              start_event_action(state.change_to_resize_by_drag, hit_resize_handle())
     81
     82          def move_event():
     83              start_event_action(state.change_to_move_by_drag, self._canvas.GetTimeAt(cursor.x))
     84
     85          def toggle_event_selection():
     86              self._canvas.toggle_event_selection(cursor, keyboard)
     87
     88          methods = MethodContainer(
     89              [
     90                  (is_resize_command(), resize_event),
     91                  (is_move_command(), move_event)
     92              ],
     93              default_method=toggle_event_selection)
     94          methods.select(True)()
     95
     96 -    def _left_mouse_down_on_timeline(self, state, cursor, keyboard):
     97
     98          def scroll():
     99              state.change_to_scroll_by_drag(cursor)
    100
    101          def create_event():
    102              self._canvas.ClearSelectedEvents()
    103              state.change_to_create_period_event_by_drag(cursor)
    104
    105          def zoom():
    106              self._canvas.ClearSelectedEvents()
    107              state.change_to_zoom_by_drag(cursor)
    108
    109          def select():
    110              state.change_to_select(cursor)
    111
    112          methods = MethodContainer(
    113              [
    114                  (Keyboard.NONE, scroll),
    115                  (Keyboard.SHIFT, zoom),
    116                  (Keyboard.CTRL, create_event),
    117                  (Keyboard.SHIFT | Keyboard.CTRL, select),
    118              ])
    119          methods.select(keyboard.keys_combination)()
    120