____                _       __
    / __ )____  _____   | |     / /___ ___________
   / __  / __ \/ ___/   | | /| / / __ `/ ___/ ___/
  / /_/ / /_/ (__  )    | |/ |/ / /_/ / /  (__  )
 /_____/\____/____/     |__/|__/\__,_/_/  /____/

       A futuristic real-time strategy game.
          This file is part of Bos Wars.

(C) Copyright 2001-2007 by the Bos Wars and Stratagus Project. Distributed under the "GNU General Public License"

---

listbox.cpp

Go to the documentation of this file.

/*      _______   __   __   __   ______   __   __   _______   __   __                 
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\                
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /                 
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /                  
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /                   
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /                    
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/                      
 *
 * Copyright (c) 2004, 2005 darkbits                        Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naess� a.k.a jansem/yakslem                _asww7!uY`>  )\a//
 *                                                 _Qhm`] _f "'c  1!5m
 * Visit: http://guichan.darkbits.org             )Qk<P ` _: :+' .'  "{[
 *                                               .)j(] .d_/ '-(  P .   S
 * License: (BSD)                                <Td/Z <fP"5(\"??"\a.  .L
 * Redistribution and use in source and          _dV>ws?a-?'      ._/L  #'
 * binary forms, with or without                 )4d[#7r, .   '     )d`)[
 * modification, are permitted provided         _Q-5'5W..j/?'   -?!\)cam'
 * that the following conditions are met:       j<<WP+k/);.        _W=j f
 * 1. Redistributions of source code must       .$%w\/]Q  . ."'  .  mj$
 *    retain the above copyright notice,        ]E.pYY(Q]>.   a     J@\
 *    this list of conditions and the           j(]1u<sE"L,. .   ./^ ]{a
 *    following disclaimer.                     4'_uomm\.  )L);-4     (3=
 * 2. Redistributions in binary form must        )_]X{Z('a_"a7'<a"a,  ]"[
 *    reproduce the above copyright notice,       #}<]m7`Za??4,P-"'7. ).m
 *    this list of conditions and the            ]d2e)Q(<Q(  ?94   b-  LQ/
 *    following disclaimer in the                <B!</]C)d_, '(<' .f. =C+m
 *    documentation and/or other materials      .Z!=J ]e []('-4f _ ) -.)m]'
 *    provided with the distribution.          .w[5]' _[ /.)_-"+?   _/ <W"
 * 3. Neither the name of Guichan nor the      :$we` _! + _/ .        j?
 *    names of its contributors may be used     =3)= _f  (_yQmWW$#(    "
 *    to endorse or promote products derived     -   W,  sQQQQmZQ#Wwa]..
 *    from this software without specific        (js, \[QQW$QWW#?!V"".
 *    prior written permission.                    ]y:.<\..          .
 *                                                 -]n w/ '         [.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT       )/ )/           !
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY         <  (; sac    ,    '
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING,               ]^ .-  %
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF            c <   r
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR            aga<  <La
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE          5%  )P'-3L
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR        _bQf` y`..)a
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,          ,J?4P'.P"_(\?d'.,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES               _Pa,)!f/<[]/  ?"
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT      _2-..:. .r+_,.. .
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,     ?a.<%"'  " -'.a_ _,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION)                     ^
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * For comments regarding functions please see the header file. 
 */

#include <typeinfo>

#include "guichan/basiccontainer.h"
#include "guichan/widgets/listbox.h"
#include "guichan/widgets/scrollarea.h"

namespace gcn
{
    ListBox::ListBox()
    {    
        mSelected = -1;
        mListModel = NULL;
        setWidth(100);
        setFocusable(true);
    
        addMouseListener(this);
        addKeyListener(this);
    }

    ListBox::ListBox(ListModel *listModel)
    {
        mSelected = -1;
        setWidth(100);
        setListModel(listModel);
        setFocusable(true);
    
        addMouseListener(this);
        addKeyListener(this);
    }

    void ListBox::draw(Graphics* graphics)
    {
        if (mListModel == NULL)      
        {
            return;
        }
    
        graphics->setColor(getForegroundColor());
        graphics->setFont(getFont());    
    
        int i, fontHeight;
        int y = 0;
    
        fontHeight = getFont()->getHeight();
    
        for (i = 0; i < mListModel->getNumberOfElements(); ++i)
        {      
            if (i == mSelected)
            {
                graphics->drawRectangle(Rectangle(0, y, getWidth(), fontHeight));
                graphics->setColor(Color(40, 60, 120));
                graphics->fillRectangle(Rectangle(1, y + 1, getWidth() - 2, fontHeight - 2));
            }
      
            graphics->drawText(mListModel->getElementAt(i), 1, y);      

            y += fontHeight;
        }    
    }

    void ListBox::drawBorder(Graphics* graphics)
    {
        Color faceColor = getBaseColor();
        Color highlightColor, shadowColor;
        int alpha = getBaseColor().a;
        int width = getWidth() + getBorderSize() * 2 - 1;
        int height = getHeight() + getBorderSize() * 2 - 1;
        highlightColor = faceColor + 0x303030;
        highlightColor.a = alpha;
        shadowColor = faceColor - 0x303030;
        shadowColor.a = alpha;
        
        unsigned int i;
        for (i = 0; i < getBorderSize(); ++i)
        {
            graphics->setColor(shadowColor);
            graphics->drawLine(i,i, width - i, i);
            graphics->drawLine(i,i + 1, i, height - i - 1);
            graphics->setColor(highlightColor);
            graphics->drawLine(width - i,i + 1, width - i, height - i); 
            graphics->drawLine(i,height - i, width - i - 1, height - i); 
        }
    }
    
    void ListBox::logic()
    {
        adjustSize();    
    }

    int ListBox::getSelected()
    {
        return mSelected;
    }

    void ListBox::setSelected(int selected)
    {
        if (mListModel == NULL)
        {
            mSelected = -1;
        }
        else
        {
            if (selected < 0)
            {
                mSelected = -1;
            }
            else if (selected >= mListModel->getNumberOfElements())
            {
                mSelected = mListModel->getNumberOfElements() - 1;
            }
            else
            {
                mSelected = selected;
            }

            Widget *par = getParent();
            if (par == NULL)
            {
                return;
            }            
            
            ScrollArea* scrollArea = dynamic_cast<ScrollArea *>(par);
            if (scrollArea != NULL)
            {
                Rectangle scroll;
                scroll.y = getFont()->getHeight() * mSelected;
                scroll.height = getFont()->getHeight();
                scrollArea->scrollToRectangle(scroll);
            }
        }
    }

    bool ListBox::keyPress(const Key& key)
    {
        bool ret = false;

        if (key.getValue() == Key::ENTER || key.getValue() == Key::SPACE)
        {
            generateAction();
            ret = true;
        }
        else if (key.getValue() == Key::UP)
        {      
            setSelected(mSelected - 1);

            if (mSelected == -1)
            {
                setSelected(0);
            }
            ret = true;
        }
        else if (key.getValue() == Key::DOWN)
        {
            setSelected(mSelected + 1);
            ret = true;
        }

        return ret;
    }

    void ListBox::mousePress(int x, int y, int button)
    {
        if (button == MouseInput::LEFT && hasMouse())
        {
            setSelected(y / getFont()->getHeight());
            generateAction();
        }
    }

    void ListBox::setListModel(ListModel *listModel)
    {
        mSelected = -1;
        mListModel = listModel;
        adjustSize();    
    }
  
    ListModel* ListBox::getListModel()
    {
        return mListModel;    
    }

    void ListBox::adjustSize()
    {
        if (mListModel != NULL)
        {      
            setHeight(getFont()->getHeight() * mListModel->getNumberOfElements());
        }    
    }  
}

---