//  $Id: combobox.cpp 3138 2007-09-13 05:27:19Z jsalmon3 $
//
//  Pingus - A free Lemmings clone
//  Copyright (C) 2007 Jason Green <jave27@gmail.com>
//
//  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

#include <vector>
#include <string>
#include "combobox.hpp"
#include "combobox_listener.hpp"
#include "../fonts.hpp"

namespace GUI {

// Constructor
Combobox::Combobox (Vector2i p, ComboboxListener* listener_, std::string l) :
  current_item(0),
  drop_down(false),
  hover(false),
  pos(p),
  enabled(false),
  label(l),
  listener(listener_)
{
  // Default to 20 characters wide.
  width = Fonts::pingus_small.get_width('O') * 20;
  height = Fonts::pingus_small.get_height();
}

// Destructor
Combobox::~Combobox ()
{
  clear();
}

// Add an item to the combobox
void
Combobox::add(ComboItem* item)
{
  item_list.push_back(item);
}

// Remove an item from the combobox.  Delete it if necessary
void
Combobox::remove(ComboItem* item)
{
  for (std::vector<ComboItem*>::iterator i = item_list.begin();
       i != item_list.end(); i++)
    {
      if ((*i) == item)
        {
          item_list.erase(i);
          if (item->delete_it())
            delete item;
        }
    }
}

// Remove all items from this combobox
void
Combobox::clear()
{
  for (std::vector<ComboItem*>::iterator i = item_list.begin();
       i != item_list.end(); i++)
    {
      if ((*i)->delete_it())
        delete (*i);
    }
  item_list.clear();
  current_item = 0;
  drop_down = false;
}

// Returns whether or not the combobox is at this location
bool
Combobox::is_at(int x, int y)
{
  if (enabled)
    return (x > pos.x && x < pos.x + get_width() &&
            y > pos.y && y < pos.y + get_height());
  else
    return false;
}

// Returns the width of the box
int
Combobox::get_width()
{
  return width;
}

// Returns the height of the box
int
Combobox::get_height()
{
  if (drop_down)
    return height * (item_list.size() + 1);
  else
    return height;
}

// action taken when the primary mouse button is clicked
void
Combobox::on_primary_button_click(int x, int y)
{
  if (drop_down)
    {
      // Determine which item was selected, if any, and set the current item to it.
      drop_down = false;
      if (y > pos.y + height)
        {
          current_item = item_list[(y - pos.y - height) / height];
          listener->combobox_changed(this);
        }
    }
  else
    {
      drop_down = true;
    }
}

// Draws the Combobox on the screen at it's location
void
Combobox::draw(DrawingContext &gc)
{
  if (!enabled)
    return;
	
  // Draw the label
  gc.print_right(Fonts::pingus_small, pos.x, pos.y, label);

  // Draw the rectangle
  gc.draw_fillrect(pos.x, pos.y, pos.x + get_width(), pos.y + get_height(),
                   Color(255,255,255));

  // Next, draw the rectangle border
  gc.draw_rect(pos.x, pos.y, pos.x + get_width(), pos.y + get_height(),
               Color(0,0,0));

  if (drop_down && item_list.size() > 0)
    {
      // Draw the highlighted box
      int y_offset = (((mouse_pos.y - pos.y - height)/height)+1) * height;
      gc.draw_fillrect(pos.x, pos.y + y_offset, pos.x + get_width(), pos.y + y_offset + 
                       height, Color(128,128,128));
		
      // Draw all of the items
      for (unsigned i = 0; i < item_list.size(); i++)
        {
          gc.print_left(Fonts::pingus_small, pos.x + 5, pos.y + ((i + 1) * height), 
                        item_list[i]->get_displayed_string());
        }
    }

  if (current_item)
    {
      // Print the currently selected item
      gc.print_left(Fonts::pingus_small, pos.x + 3, pos.y, current_item->get_displayed_string());
    }
}

} // namespace GUI 

/* EOF */