Redmine 3.4.4

app/helpers/gantt_helper.rb

@@ -0,0 +1,43 @@
+# encoding: utf-8
+#
+# Redmine - project management software
+# Copyright (C) 2006-2017  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 l(:text_zoom_in),
+          {:params => request.query_parameters.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 l(:text_zoom_out),
+          {:params => request.query_parameters.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