Gnumed.timelinelib.view.zoom

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# Source Code for Module Gnumed.timelinelib.view.zoom

     1  # Copyright (C) 2009, 2010, 2011  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.view.periodbase import SelectPeriodByDragInputHandler
    20
    21
    22 -class ZoomByDragInputHandler(SelectPeriodByDragInputHandler):
    23
    24 -    def __init__(self, controller, status_bar_adapter, start_time):
    25          SelectPeriodByDragInputHandler.__init__(self, controller, start_time)
    26          self.controller = controller
    27          self.status_bar_adapter = status_bar_adapter
    28          self.status_bar_adapter.set_text(_("Select region to zoom into"))
    29
    30 -    def mouse_moved(self, x, y, alt_down=False):
    31          SelectPeriodByDragInputHandler.mouse_moved(self, x, y, alt_down)
    32          try:
    33              p = self.get_current_period()
    34          except ValueError:
    35              self.status_bar_adapter.set_text(_("Region too long"))
    36          else:
    37              if p.delta() < p.time_type.get_min_zoom_delta()[0]:
    38                  self.status_bar_adapter.set_text(_("Region too short"))
    39              else:
    40                  self.status_bar_adapter.set_text("")
    41
    42 -    def end_action(self):
    43          self.status_bar_adapter.set_text("")
    44          period = self.get_last_valid_period()
    45          start = period.start_time
    46          end = period.end_time
    47          delta = end - start
    48          if period.time_type.zoom_is_ok(delta):
    49              # Don't zoom in to less than an hour which upsets things.
    50              self.controller.navigate_timeline(lambda tp: tp.update(start, end))
    51