dropdown.cpp

Linux系统下的《红色警戒》游戏

/*      _______   __   __   __   ______   __   __   _______   __   __                 
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 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /                    
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/                      
 *
 * Copyright (c) 2004, 2005 darkbits                        Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naess閚 a.k.a jansem/yakslem                _asww7!uY`>  )\a//
 *                                                 _Qhm`] _f "'c  1!5m
 * Visit: http://guichan.darkbits.org             )Qk<P ` _: :+' .'  "{[
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#include "guichan/exception.h"
#include "guichan/widgets/dropdown.h"

namespace gcn
{  
    DropDown::DropDown()
    {
        mDroppedDown = false;
        mPushed = false;
        mOldH = 0;
    
        setWidth(100);
        setFocusable(true);

        mDefaultScrollArea = new ScrollArea();
        mDefaultScrollArea->setHorizontalScrollPolicy(ScrollArea::SHOW_NEVER);
        mDefaultListBox = new ListBox();

        mScrollArea = mDefaultScrollArea;
        mScrollArea->_setFocusHandler(&mFocusHandler);
        mScrollArea->_setParent(this);
        
        mListBox = mDefaultListBox;    
        mListBox->addActionListener(this);
        mScrollArea->setContent(mListBox);
        
        addMouseListener(this);
        addKeyListener(this);
        adjustHeight();
        setBorderSize(1);        
    }
    
    DropDown::DropDown(ListModel *listModel)
    {
        setWidth(100);
        setFocusable(true);
        mDroppedDown = false;
        mPushed = false;    
        mOldH = 0;
    
        mDefaultScrollArea = new ScrollArea();
        mDefaultScrollArea->setHorizontalScrollPolicy(ScrollArea::SHOW_NEVER);
        mDefaultListBox = new ListBox();

        mScrollArea = mDefaultScrollArea;
        mScrollArea->_setParent(this);
        mListBox = mDefaultListBox;
        mListBox->addActionListener(this);
            
        mScrollArea->setContent(mListBox);
        mScrollArea->_setFocusHandler(&mFocusHandler);
        mScrollArea->_setParent(this);
            
        setListModel(listModel);
    
        if (mListBox->getSelected() < 0)
        {
            mListBox->setSelected(0);
        }

        addMouseListener(this);
        addKeyListener(this);
        adjustHeight();
        setBorderSize(1);        
    }
  
    DropDown::DropDown(ListModel *listModel,
                       ScrollArea *scrollArea,
                       ListBox *listBox)
    {
        setWidth(100);
        setFocusable(true);
        mDroppedDown = false;
        mPushed = false;
        mOldH = 0;
    
        mDefaultScrollArea = NULL;
        mDefaultListBox = NULL;

        mScrollArea = scrollArea;
        mScrollArea->_setFocusHandler(&mFocusHandler);

        mListBox = listBox;    
        mListBox->addActionListener(this);
        mScrollArea->setContent(mListBox);
        mScrollArea->_setParent(this);
            
        setListModel(listModel);

        if (mListBox->getSelected() < 0)
        {
            mListBox->setSelected(0);
        }

        addMouseListener(this);
        addKeyListener(this);
        adjustHeight();
        setBorderSize(1);        
    }

    DropDown::~DropDown()
    {      
        if (mScrollArea != NULL)
        {
            mScrollArea->_setFocusHandler(NULL);
        }

        if (mDefaultScrollArea != NULL)
        {
            delete mDefaultScrollArea;
        }

        if (mDefaultListBox != NULL)
        {
            delete mDefaultListBox;
        }

        if (widgetExists(mListBox))
        {
            mListBox->removeActionListener(this);
        }
    }
  
    void DropDown::logic()
    {
        if (mScrollArea == NULL || mScrollArea->getContent() == NULL)
        {
            throw GCN_EXCEPTION("ScrollArea or ListBox is NULL.");
        }
      
        mScrollArea->logic();
        mFocusHandler.applyChanges();
    }
    
    void DropDown::draw(Graphics* graphics)
    {     
        if (mScrollArea == NULL || mScrollArea->getContent() == NULL)
        {
            throw GCN_EXCEPTION("ScrollArea or ListBox is NULL.");
        }

        int h;

        if (mDroppedDown)
        {
            h = mOldH;
        }
        else
        {
            h = getHeight();
        }
    
        int alpha = getBaseColor().a;
        Color faceColor = getBaseColor();
        faceColor.a = alpha;
        Color highlightColor = faceColor + 0x303030;
        highlightColor.a = alpha;
        Color shadowColor = faceColor - 0x303030;      
        shadowColor.a = alpha;    
        

        graphics->setColor(getBackgroundColor());
        graphics->fillRectangle(Rectangle(0, 0, getWidth(), h));
   
        graphics->setColor(getForegroundColor());
        graphics->setFont(getFont());
    
        if (mListBox->getListModel() && mListBox->getSelected() >= 0)
        {
            graphics->drawText(mListBox->getListModel()->getElementAt(mListBox->getSelected()),
                1, (h - getFont()->getHeight()) / 2);
        }

        if (hasFocus())
        {
            graphics->drawRectangle(Rectangle(0, 0, getWidth() - h, h));
        }
        
        drawButton(graphics);
            
         if (mDroppedDown)
         {
             graphics->pushClipArea(mScrollArea->getDimension());
             mScrollArea->draw(graphics);
             graphics->popClipArea();

            // Draw two lines separating the ListBox with se selected
            // element view.
            graphics->setColor(highlightColor);
            graphics->drawLine(0, h, getWidth(), h);
            graphics->setColor(shadowColor);
            graphics->drawLine(0, h + 1,getWidth(),h + 1);
         }        
    }

    void DropDown::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 DropDown::drawButton(Graphics *graphics)
    {
        Color faceColor, highlightColor, shadowColor;
        int offset;
        int alpha = getBaseColor().a;
        
        if (mPushed)
        {
            faceColor = getBaseColor() - 0x303030;
            faceColor.a = alpha;
            highlightColor = faceColor - 0x303030;
            highlightColor.a = alpha;
            shadowColor = faceColor + 0x303030;
            shadowColor.a = alpha;
            offset = 1;
        }
        else
        {
            faceColor = getBaseColor();
            faceColor.a = alpha;
            highlightColor = faceColor + 0x303030;
            highlightColor.a = alpha;
            shadowColor = faceColor - 0x303030;
            shadowColor.a = alpha;
            offset = 0;
        }

        int h;
        if (mDroppedDown)
        {
            h = mOldH;
        }
        else
        {
            h = getHeight();
        }
        int x = getWidth() - h;
        int y = 0;    

        graphics->setColor(faceColor);
        graphics->fillRectangle(Rectangle(x+1, y+1, h-2, h-2));

        graphics->setColor(highlightColor);
        graphics->drawLine(x, y, x+h-1, y);
        graphics->drawLine(x, y+1, x, y+h-1);

        graphics->setColor(shadowColor);
        graphics->drawLine(x+h-1, y+1, x+h-1, y+h-1);
        graphics->drawLine(x+1, y+h-1, x+h-2, y+h-1);

        graphics->setColor(getForegroundColor());
    
        int i;
        int hh = h / 3;
        int hx = x + h / 2;
        int hy = y + (h * 2) / 3;
        for (i=0; i<hh; i++)
        {
            graphics->drawLine(hx - i + offset,
                               hy - i + offset,
                               hx + i + offset,
                               hy - i + offset);
        }        
    }
    
    int DropDown::getSelected()
    {
        if (mScrollArea == NULL || mScrollArea->getContent() == NULL)
        {
            throw GCN_EXCEPTION("ScrollArea or ListBox is NULL.");
        }

        return mListBox->getSelected();        
    }
    
    void DropDown::setSelected(int selected)