Have an ajax memory tree in a pl/sql region be rendered only once in a page

Question

Hi all,
I have a pl/sql region with region source calling a function "ajax_memory_tree.render". Everytime I come back to this particular page, I am having a tree being rendered. Can you give any suggestion as to how I can have only one tree. Thank you for your help/ideas.
regards,
Suma.

Answer 1

procedure render_branch
  (p_type in varchar2, p_icon in varchar2, p_class in varchar2, p_id in number, p_pid in number, p_name in varchar2)
is
x varchar2(1000);
y varchar2(2000);
begin
-- If the branch has sub nodes, render it with a +/- sign
if p_type = 'exp' then
    htp.prn('<li style="vertical-align:right;"><img style="cursor:pointer;margin-right:15px;"
         src="/i/' || p_icon || '.gif" onClick="getTreeNode(this,''' || p_id || ''')" />
   <a class="' || p_class || '" href="f?p=' ||
   v('APP_ID') || ':1:' || v('APP_SESSION') || '::::P1_SELECTED_NODE:' || p_id || '">' || p_name ||
   '</a></span></li>');
-- Otherwise, just render the item
else
if p_id = 5000 then
    select opt_path into x from e_navopts where opt_num = p_id and popt_num = p_pid
    and userid = v('APP_USER');
        htp.prn('<li style="vertical-align:right;margin-left:15px;"><img src="/i/wwv_bullet.gif" style="padding-right:8px;"/><a
  class="' || p_class || '" href="'||x || v('APP_SESSION')|| '::::'||
  '">' || p_name ||'</a></span></li>');
elsif  p_id = 3000 then
    select opt_path into x from e_navopts where opt_num = p_id and popt_num = p_pid
    and userid = v('APP_USER');
    select opt_params into y from e_navopts where opt_num = p_id and popt_num = p_pid
    and userid = v('APP_USER');
       htp.prn('<li style="vertical-align:right;margin-left:15px;"><img src="/i/wwv_bullet.gif" style="padding-right:8px;"/><a
  class="' || p_class || '" href="'||x || v('APP_SESSION')|| '::::'||
  '">' || p_name ||'</a></span></li>');
else
  htp.prn('<li style="vertical-align:right;margin-left:15px;"><img src="/i/wwv_bullet.gif" style="padding-right:8px;"/><a
  class="' || p_class || '" href="f?p=' || v('APP_ID') || ':1:' || v('APP_SESSION') ||
  '::::P1_SELECTED_NODE:' || p_id || '">' || p_name || '</a></span></li>');
    end if;
end if;
end render_branch;