a4纸标签自定义打印排版

class PrintBase
  # 默认现在只有a4纸大小
  PaperType = {1=>[210,297]}
  # 标签尺寸
  TagType = {0=>[100,40],1=>[60,40],2=>[150,60]}

  attr_accessor :id,:tag_type_x,:tag_type_y,:print_size,:print_x_size,:print_y_size,:print_page

  def initialize(tag_type=0, obj_size=nil , paper_type=1)
    @paper_type_x = PaperType[paper_type][0]
    @paper_type_y = PaperType[paper_type][1]
    @tag_type_x = TagType[tag_type][0]
    @tag_type_y = TagType[tag_type][1]
    @id = tag_type
    
    # 纸张可用面积
    @paper_type_area = @paper_type_x * @paper_type_y 
    # 标签面积
    @tag_type_area = @tag_type_x * @tag_type_y
    # 每行打印张数
    @print_x_size = @paper_type_x / @tag_type_x
    # 每列打印张数
    @print_y_size = @paper_type_y / @tag_type_y

    # 每页纸打印标签张数
    @print_size = @paper_type_area / @tag_type_area
    @print_size = @print_x_size * @print_y_size < @print_size ? @print_x_size * 
    @print_y_size : @print_size
    # 需打印纸张数
    @print_page = obj_size ? ( obj_size / @print_size + (obj_size % @print_size == 0 ? 0 : 1) ) : 1
  end

end    

class Admin::Print::WhmallTagsController <  Admin::BaseController
    layout:false
	def print
      @tag = PrintBase.new(params[:tag_id].to_i)
      @chemical = ::Chemical.find(params[:chemical_id]|| 25)
	end
end

<style type="text/css" media="print">
.noprint{display : none }
.pageBreak{ page-break-after:always;}
</style>

[align=center]

   <div style="width:100%">
     <div>
       <% ([e-mail]_size).each do |i|%>
          <%if i == 1 %>
            <!--首行行头!-->
            <div> 
            <div id="print_<%= i %>" style="width:<%= 98/@tag.print_x_size %>%;height:<%= 100/@tag.print_y_size %>%;margin-right: 10px;float: left;"> 
               <div style="width:100%;height:100%;" id="show_note<%= i %>" ><button class="show_note" id="show_button<%= i %>"><%= image_tag "4-10cm.jpg", style: 'width: 100%;height: 100%; ' %></button>[/align]
               <div style="width:100%;height:100%;display: none;" class="noprint" id="hidde_note<%= i %>"><button class="hidde_note" id="hidde_button<%= i %>"><%= image_tag "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1494828228049&di=7219b7547575eadb65d32b7ba61af822&imgtype=0&src=http%3A%2F%2Fico.ooopic.com%2Ficonset02%2F6%2Fgif%2F53757.gif", style: 'width: 100%;height: 100%; ' %></button></div>
            </div> 
          <% elsif i  == @tag.print_size %>
            <!--末行行尾!-->
            <div id="print_<%= i %>" style="width:<%= 98/@tag.print_x_size %>%;height:<%= 100/@tag.print_y_size %>%;float: left;">
              <%= render :partial => "print" , :locals => { :i => i }%> 
              <div style="width:100%;height:100%;" class="noprint" id="hidde_note<%= i %>"><button class="hidde_note" id="hidde_button<%= i %>"><%= image_tag "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1494828228049&di=7219b7547575eadb65d32b7ba61af822&imgtype=0&src=http%3A%2F%2Fico.ooopic.com%2Ficonset02%2F6%2Fgif%2F53757.gif", style: 'width: 100%;height: 100%; ' %></button></div>
            </div>   
          <% elsif i % @tag.print_x_size == 0 %>
            <!--每行行尾!-->
            <div id="print_<%= i %>" style="width:<%= 98/@tag.print_x_size %>%;height:<%= 100/@tag.print_y_size %>%;float: left;">
             <div style="width:100%;height:100%;display: none;" id="show_note<%= i %>" ><button class="show_note" id="show_button<%= i %>"><%= image_tag "4-10cm.jpg", style: 'width: 100%;height: 100%; ' %></button></div>
               <div style="width:100%;height:100%;" class="noprint" id="hidde_note<%= i %>"><button class="hidde_note" id="hidde_button<%= i %>"><%= image_tag "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1494828228049&di=7219b7547575eadb65d32b7ba61af822&imgtype=0&src=http%3A%2F%2Fico.ooopic.com%2Ficonset02%2F6%2Fgif%2F53757.gif", style: 'width: 100%;height: 100%; ' %></button></div>
            </div> 
            </div> 
            </br> <div> 
          <% else %>
            <div id="print_<%= i %>" style="width:<%= 98/@tag.print_x_size %>%;height:<%= 100/@tag.print_y_size %>%;margin-right: 10px;float: left;">
              <div style="width:100%;height:100%;display: none;" id="show_note<%= i %>" ><button class="show_note" id="show_button<%= i %>"><%= image_tag "4-10cm.jpg", style: 'width: 100%;height: 100%; ' %></button></div>
               <div style="width:100%;height:100%;" class="noprint" id="hidde_note<%= i %>"><button class="hidde_note" id="hidde_button<%= i %>"><%= image_tag "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1494828228049&di=7219b7547575eadb65d32b7ba61af822&imgtype=0&src=http%3A%2F%2Fico.ooopic.com%2Ficonset02%2F6%2Fgif%2F53757.gif", style: 'width: 100%;height: 100%; ' %></button></div>
            </div>         
          <% end %>
       <% end %>
     </div>
   </div>

   <div class="pageBreak"></digv>

</div>


<script type="text/javascript">
  $(".show_note").on('click',function(){
    var id = this.id.replace ( /[^\d.]/g, '' )
    $('#show_note'+ id).hide();
    $('#hidde_note'+ id).show();
  });
  $(".hidde_note").on('click',function(){
    var id = this.id.replace ( /[^\d.]/g, '' )
    $('#hidde_note'+ id).hide();
    $('#show_note'+ id).show();
  });

  // 打印触发
  $("#btnPrint").on('click',function(){
    $(".noprint").css("display", "")
    window.print();
  })

  // 切换标签
  $("#tag_id").on('change',function(){
    var tag_id = $("#tag_id").val();
    window.location.href = '/admin/print/whmall_tags/print?tag_id='+tag_id+"&chemical_id="+"<%= @chemical.id %>" ;
  })

  // 快速选择
  $("#select_tag").on('change',function(){
    var select_tag = $("#select_tag").val();
    if(select_tag==0){
     <% ([e-mail]_size).each do |i|%>
       var id = "<%= i %>"
       $('#hidde_note'+ id).hide();
       $('#show_note'+ id).show();
     <% end %>
    }else if(select_tag==1){
     <% ([e-mail]_size).each do |i|%>
       var id = "<%= i %>"
       $('#show_note'+ id).hide();
       $('#hidde_note'+ id).show();
     <% end %>
    }else if(select_tag==2){
     <% (1..(@tag.print_size/2)).each do |i|%>
       var id = "<%= i %>"
       $('#hidde_note'+ id).hide();
       $('#show_note'+ id).show();
     <% end %> 
    }
  })
</script>