Re: [Cppcms-users] rendering list of widgets::checkbox

[Artyom <art...@ya...>]

Hello,

First of all all widgets are not copyable so you can't put
them to STL containers!

The simplest way is to call form::attach(...) and add them dynamically
to the form as pointers (ownership is transferred to the form object)

Then you can render them as

<% foreach box in my_form.list_of_pointers_to_checkboxes %>
  <ul>
  <% item %>
    <li><% form as_space *box %></li>
  <% end %>
  </ul>
<% end %> 

Each one independently or you can use a sub form that you add
all dynamic widgets to it and render them in one command

<% from as_ul my_form.chckboxes_subform %>


For example:

class my_form : public cppcms::form{
   cppcms::form checkboxes; // Subform
   std::vector<cppcms::widgets::checkox *> boxes;
   my_form()
   {
      add(checkboxes); // register to parent
      for(int i=0;i<n;i++) {
         cppcms::widgets::checkox *box = new cppcms::widgets::checkox();
         checkboxes.attach(box); // transfer ownership and register to parent
         box->message(...)
         boxes.push_back(box);
      }
   }
}


Rendering

<% from as_ul my_form.checkboxes %>


Take a look on this as example:

  
http://cppcms.svn.sourceforge.net/viewvc/cppcms/blog/trunk/views/admin/post.tmpl?revision=1690&view=markup

  
http://cppcms.svn.sourceforge.net/viewvc/cppcms/blog/trunk/data/admin/post.h?revision=1690&view=markup

  
http://cppcms.svn.sourceforge.net/viewvc/cppcms/blog/trunk/apps/admin/post.cpp?revision=1691&view=markup



Artyom



----- Original Message ----
> From: augustin <aug...@ov...>
> To: cpp...@li...
> Sent: Thu, March 10, 2011 9:37:25 AM
> Subject: [Cppcms-users] rendering list of widgets::checkbox
> 
> 
> Hello Artyom,
> 
> I have a form with a series of checkboxes. The number  of checkboxes is 
> variable and know at run time.
> 
> I figured I could use  a std::list of widgets::checkbox, and declare that 
>within 
>
> my form struct,  but I am wondering how to render this in the  template:
> http://art-blog.no-
> ip.info/wikipp/en/page/cppcms_1x_templates_comm#Rendering.Forms
> 
> Will  cppcms iterate itself over any STL class like a list or a map? 
> A form  containing simple widgets is easy enough to render:
> <% form as_p info  %>
> but how would that look like if the form includes a std::list of  widgets?
> 
> Thanks,
> 
> Augustin.
> 
> 
> 
> 
> 
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