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# encoding: utf-8

#

# Redmine - project management software

# Copyright (C) 2006-2011  Jean-Philippe Lang

#

# This program 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 2

# of the License, or (at your option) any later version.

#

# This program 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 this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

module GanttHelper

  def gantt_zoom_link(gantt, in_or_out)

    case in_or_out

    when :in

      if gantt.zoom < 4

        link_to_content_update l(:text_zoom_in),

          params.merge(gantt.params.merge(:zoom => (gantt.zoom+1))),

          :class => 'icon icon-zoom-in'

      else

        content_tag('span', l(:text_zoom_in), :class => 'icon icon-zoom-in').html_safe

      end

    when :out

      if gantt.zoom > 1

        link_to_content_update l(:text_zoom_out),

          params.merge(gantt.params.merge(:zoom => (gantt.zoom-1))),

          :class => 'icon icon-zoom-out'

      else

        content_tag('span', l(:text_zoom_out), :class => 'icon icon-zoom-out').html_safe

      end

    end

  end

end