scrollarea.cpp

Linux系统下的《红色警戒》游戏

            drawUpButton(graphics);
            drawDownButton(graphics);
            drawVBar(graphics);
            drawVMarker(graphics);
        }
      
        if (mHBarVisible)
        {
            drawLeftButton(graphics);
            drawRightButton(graphics);
            drawHBar(graphics);
            drawHMarker(graphics);
        }
      
        if (mHBarVisible && mVBarVisible)
        {
            graphics->setColor(getBaseColor());
            graphics->fillRectangle(Rectangle(getWidth() - mScrollbarWidth,
                                              getHeight() - mScrollbarWidth,
                                              mScrollbarWidth,
                                              mScrollbarWidth));
        }

        if (mContent)
        {
            Rectangle contdim = mContent->getDimension();        
            graphics->pushClipArea(getContentDimension());

            if (mContent->getBorderSize() > 0)
            {
                Rectangle rec = mContent->getDimension();
                rec.x -= mContent->getBorderSize();
                rec.y -= mContent->getBorderSize();
                rec.width += 2 * mContent->getBorderSize();
                rec.height += 2 * mContent->getBorderSize();                    
                graphics->pushClipArea(rec);
                mContent->drawBorder(graphics);
                graphics->popClipArea();
            }
                
            graphics->pushClipArea(contdim);
            mContent->draw(graphics);
            graphics->popClipArea();
            graphics->popClipArea();
        }
    }

    void ScrollArea::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 ScrollArea::drawHBar(Graphics* graphics)
    {
        Rectangle dim = getHorizontalBarDimension();

        graphics->pushClipArea(dim);

        int alpha = getBaseColor().a;
        Color trackColor = getBaseColor() - 0x101010;
        trackColor.a = alpha;
        Color shadowColor = getBaseColor() - 0x303030;
        shadowColor.a = alpha;
        
        graphics->setColor(trackColor);
        graphics->fillRectangle(Rectangle(0, 0, dim.width, dim.height));

        graphics->setColor(shadowColor);
        graphics->drawLine(0, 0, dim.width, 0);

        graphics->popClipArea();    
    }
  
    void ScrollArea::drawVBar(Graphics* graphics)
    {
        Rectangle dim = getVerticalBarDimension();

        graphics->pushClipArea(dim);

        int alpha = getBaseColor().a;
        Color trackColor = getBaseColor() - 0x101010;
        trackColor.a = alpha;
        Color shadowColor = getBaseColor() - 0x303030;
        shadowColor.a = alpha;

        graphics->setColor(trackColor);
        graphics->fillRectangle(Rectangle(0, 0, dim.width, dim.height));
    
        graphics->setColor(shadowColor);
        graphics->drawLine(0, 0, 0, dim.height);
        
        graphics->popClipArea();
    }
  
    void ScrollArea::drawUpButton(Graphics* graphics)
    {
        Rectangle dim = getUpButtonDimension();
        graphics->pushClipArea(dim);
    
        Color highlightColor;
        Color shadowColor;
        Color faceColor;
        int offset;
        int alpha = getBaseColor().a;
        
        if (mUpButtonPressed)
        {
            faceColor = getBaseColor() - 0x303030;      
            faceColor.a = alpha;
            highlightColor = faceColor - 0x303030;
            highlightColor.a = alpha;
            shadowColor = getBaseColor();
            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;
        }

        graphics->setColor(faceColor);      
        graphics->fillRectangle(Rectangle(0, 0, dim.width, dim.height));

        graphics->setColor(highlightColor);
        graphics->drawLine(0, 0, dim.width - 1, 0);
        graphics->drawLine(0, 1, 0, dim.height - 1);
    
        graphics->setColor(shadowColor);
        graphics->drawLine(dim.width - 1, 0, dim.width - 1, dim.height - 1);
        graphics->drawLine(1, dim.height - 1, dim.width - 1, dim.height - 1);
    
        graphics->setColor(getForegroundColor());
    
        int i;
        int w = dim.height / 2;
        int h = w / 2 + 2;
        for (i = 0; i < w / 2; ++i)
        {
            graphics->drawLine(w - i + offset,
                               i + h + offset,
                               w + i + offset,
                               i + h + offset);
        }
    
        graphics->popClipArea();
    }

    void ScrollArea::drawDownButton(Graphics* graphics)
    {    
        Rectangle dim = getDownButtonDimension();
        graphics->pushClipArea(dim);

        Color highlightColor;
        Color shadowColor;
        Color faceColor;
        int offset;
        int alpha = getBaseColor().a;
        
        if (mDownButtonPressed)
        {
            faceColor = getBaseColor() - 0x303030;      
            faceColor.a = alpha;
            highlightColor = faceColor - 0x303030;
            highlightColor.a = alpha;
            shadowColor = getBaseColor();
            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;
        }
        
        graphics->setColor(faceColor);      
        graphics->fillRectangle(Rectangle(0, 0, dim.width, dim.height));

        graphics->setColor(highlightColor);
        graphics->drawLine(0, 0, dim.width - 1, 0);
        graphics->drawLine(0, 1, 0, dim.height - 1);
    
        graphics->setColor(shadowColor);
        graphics->drawLine(dim.width - 1, 0, dim.width - 1, dim.height - 1);
        graphics->drawLine(1, dim.height - 1, dim.width - 1, dim.height - 1);
    
        graphics->setColor(getForegroundColor());
    
        int i;
        int w = dim.height / 2;
        int h = w + 1;
        for (i = 0; i < w / 2; ++i)
        {
            graphics->drawLine(w - i + offset,
                               -i + h + offset,
                               w + i + offset,
                               -i + h + offset);      
        }
    
        graphics->popClipArea();
    }

    void ScrollArea::drawLeftButton(Graphics* graphics)
    {
        Rectangle dim = getLeftButtonDimension();
        graphics->pushClipArea(dim);

        Color highlightColor;
        Color shadowColor;
        Color faceColor;
        int offset;
        int alpha = getBaseColor().a;
        
        if (mLeftButtonPressed)
        {
            faceColor = getBaseColor() - 0x303030;      
            faceColor.a = alpha;
            highlightColor = faceColor - 0x303030;
            highlightColor.a = alpha;
            shadowColor = getBaseColor();
            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;
        }
    
        graphics->setColor(faceColor);      
        graphics->fillRectangle(Rectangle(0, 0, dim.width, dim.height));

        graphics->setColor(highlightColor);
        graphics->drawLine(0, 0, dim.width - 1, 0);
        graphics->drawLine(0, 1, 0, dim.height - 1);
    
        graphics->setColor(shadowColor);
        graphics->drawLine(dim.width - 1, 0, dim.width - 1, dim.height - 1);
        graphics->drawLine(1, dim.height - 1, dim.width - 1, dim.height - 1);
    
        graphics->setColor(getForegroundColor());

        int i;
        int w = dim.width / 2;
        int h = w - 2;
        for (i = 0; i < w / 2; ++i)
        {
            graphics->drawLine(i + h + offset,
                               w - i + offset,
                               i + h + offset,
                               w + i + offset);      
        }
    
        graphics->popClipArea();
    }

    void ScrollArea::drawRightButton(Graphics* graphics)
    {
        Rectangle dim = getRightButtonDimension();
        graphics->pushClipArea(dim);

        Color highlightColor;
        Color shadowColor;
        Color faceColor;
        int offset;
        int alpha = getBaseColor().a;
        
        if (mRightButtonPressed)
        {
            faceColor = getBaseColor() - 0x303030;      
            faceColor.a = alpha;
            highlightColor = faceColor - 0x303030;
            highlightColor.a = alpha;
            shadowColor = getBaseColor();
            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;
        }
    
        graphics->setColor(faceColor);      
        graphics->fillRectangle(Rectangle(0, 0, dim.width, dim.height));

        graphics->setColor(highlightColor);
        graphics->drawLine(0, 0, dim.width - 1, 0);
        graphics->drawLine(0, 1, 0, dim.height - 1);
    
        graphics->setColor(shadowColor);
        graphics->drawLine(dim.width - 1, 0, dim.width - 1, dim.height - 1);
        graphics->drawLine(1, dim.height - 1, dim.width - 1, dim.height - 1);
    
        graphics->setColor(getForegroundColor());
    
        int i;
        int w = dim.width / 2;
        int h = w + 1;
        for (i = 0; i < w / 2; ++i)
        {
            graphics->drawLine(-i + h + offset,
                               w - i + offset,
                               -i + h + offset,
                               w + i + offset);      
        }

        graphics->popClipArea(); 
    }

    void ScrollArea::drawVMarker(Graphics* graphics)
    {
        Rectangle dim = getVerticalMarkerDimension();
        graphics->pushClipArea(dim);

        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(faceColor);
        graphics->fillRectangle(Rectangle(1, 1, dim.width - 1, dim.height - 1));
    
        graphics->setColor(highlightColor);
        graphics->drawLine(0, 0, dim.width - 1, 0);
        graphics->drawLine(0, 1, 0, dim.height - 1);
    
        graphics->setColor(shadowColor);    
        graphics->drawLine(1, dim.height - 1, dim.width - 1, dim.height - 1);
        graphics->drawLine(dim.width - 1, 0, dim.width - 1, dim.height - 1);

        graphics->popClipArea();
    }

    void ScrollArea::drawHMarker(Graphics* graphics)
    {
        Rectangle dim = getHorizontalMarkerDimension();
        graphics->pushClipArea(dim);
        
        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(faceColor);      
        graphics->fillRectangle(Rectangle(1, 1, dim.width - 1, dim.height - 1));
    
        graphics->setColor(highlightColor);
        graphics->drawLine(0, 0, dim.width - 1, 0);
        graphics->drawLine(0, 1, 0, dim.height - 1);
    
        graphics->setColor(shadowColor);    
        graphics->drawLine(1, dim.height - 1, dim.width - 1, dim.height - 1);
        graphics->drawLine(dim.width - 1, 0, dim.width - 1, dim.height - 1);

        graphics->popClipArea();
    }
  
    void ScrollArea::logic()
    {
        checkPolicies();

        setVerticalScrollAmount(getVerticalScrollAmount());
        setHorizontalScrollAmount(getHorizontalScrollAmount());
        
        if (mContent != NULL)
        {
            mContent->setPosition(-mHScroll + getContentDimension().x + mContent->getBorderSize(),
                                  -mVScroll + getContentDimension().y + mContent->getBorderSize());

            mContent->logic();
        }    
    }

    void ScrollArea::moveToTop(Widget* widget)
    {
        if (widget == mContent)
        {