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behavior::select-buddy

 
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simhau



Joined: 06 Feb 2007
Posts: 55
PostPosted: Mon Apr 07, 2008 10:20 am    Post subject: behavior::select-buddy Reply with quote
I ported the select-buddy behavior. This is done pretty much line by line, and I don't know c++, d or htmlayout, sooo... Check for errors Smile

Code:

/*
BEHAVIOR: select-buddy
    goal: Auxiliary buttons for various <select multiple> actions.
    actions: "select-all" - select all options
             "clear-all" - deselect all options
    for pair of <select>s:
             "move-all" - move all options from source to destination
             "move-selected" - move selected options from source to destination
             "revoke-all" - move all options from destination to source
             "revoke-selected" - move all options from destination to source
TYPICAL USE CASE:
   <div style="behavior:select-buddy">
      <widget type="select" multiple="checks" role="source">
         <option>...
      </widget>
      <input type="button" action="move-all">move all</input>
      <input type="button" action="move-selected">move selected</button>
      <widget type="select" multiple="checks" role="destination">
         <option>...
      </widget>
   </div>
SAMPLE:
*/
module htmlayout.behaviors.select_buddy;

import htmlayout.events;
import htmlayout.capi;
import htmlayout.element;

import Integer = tango.text.convert.Integer;

static this()
{
   new HBehaviorSelectBuddy;
}


/// Selects all options in multiselect
void selectAllOptions(HElement el)
{
   HElement[] selected = el.select("option");
   foreach( sel; selected )
      sel.state(STATE_CHECKED, 0, false);
   el.update();
}


/// Clear checked states in multiselect <select>.
/// This simply resets :checked state for all checked <option>'s
void clearAllOptions(HElement el)
{
   HElement[] selected = el.select("option:checked,[role='option']:checked");
   foreach( sel; selected )
      sel.state(0, STATE_CHECKED, false);
   el.update();   
}


class HBehaviorSelectBuddy : HBehavior
{
   this()
   {
      super( "select-buddy", HANDLE_BEHAVIOR_EVENT );
   }

   bool onBehaviorEvent(HBehaviorEvent evt)
   {
      if( evt.cmd == BUTTON_CLICK )
      {
         auto target = new HElement(evt.heTarget);
         auto action = target.attribute("action");
         switch( action )
         {
         case "select-all":
            return doSelectAll(evt.element);
         case "clear-all":
            return doClearAll(evt.element);
         case "move-all":
            return doMove(evt.element, true, false);
         case "move-selected":
            return doMove(evt.element, true, true);
         case "revoke-all":
            return doMove(evt.element, false, false);
         case "revoke-selected":
            return doMove(evt.element, false, true);
         default:
            return false;
         }
      }
      return false;
   }

   bool doSelectAll(HElement el)
   {
      HElement[] select = el.select("[role='source']");
      if( select.length )
      {
         selectAllOptions(el);
         return true;
      }
      else
      {
         return false;
      }
   }

   bool doClearAll(HElement el)
   {
      HElement[] select = el.select("[role='source']");
      if( select.length )
      {
         clearAllOptions(el);
         return true;
      }
      else
      {
         return false;
      }
   }

   bool doMove(HElement el, bool srcToDst, bool selectedOnly)
   {
      HElement src = el.select("[role='source']")[0];
      HElement dst = el.select("[role='destination']")[0];
      if( !srcToDst ) // Swap 'em
      {
         HElement tmp = src;
         src = dst;
         dst = tmp;
      }

      HElement[] options = src.select(
            selectedOnly?"option:checked":"option");

      if( srcToDst )
      {
         foreach_reverse( sel; options )
         {
            sel.attribute("-srcindex", Integer.toString(sel.index));
            sel.insert(dst, 0);
         }
      }
      else
      {
         foreach( sel; options )
         {
            auto idx = Integer.toInt(sel.attribute("-srcindex"));
            sel.insert(dst, idx);
         }
      }
      src.update();
      dst.update();
      return true;
   }
}
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bobef



Joined: 05 Jun 2005
Posts: 269
PostPosted: Wed Apr 09, 2008 3:16 am    Post subject: Reply with quote
Looks nice and clean. Pretty good for someone who doesn't know c++ or d or htmlayout Smile I haven't tried it but you probably did, so if it is working I could include it in the distribution (with your permission).
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simhau



Joined: 06 Feb 2007
Posts: 55
PostPosted: Wed Apr 09, 2008 6:55 am    Post subject: Reply with quote
Yes, it is tested and works. Feel free to add and change as you please. I'm porting a couple of other behaviors too. How would you like them? Ticket, forum or mail?
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bobef



Joined: 05 Jun 2005
Posts: 269
PostPosted: Wed Apr 09, 2008 12:46 pm    Post subject: Reply with quote
Tickets support attachments, but send it the way you prefer, I don't mind. My email is bobef /at/ abv /dot/ bg . Thanks!
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