////(1)在視圖類中定義宏.

#define UPCOLOR RGB(0,0,255)    //上升泡泡顏色
#define DOWNCOLOR RGB(255,0,0)  //下降泡泡顏色
#define MAX 30                  //數組上限
#define ORIGINX 30              //矩形區坐標
#define ORIGINY 50           
#define ENDX 630
#define ENDY 430
#define DR 1                    //半徑增量
#define DS 5                    //移動增量

////(2)添加視圖類的成員變量.

class CBubbleView:public CView
{
     //此處略去若干行由系統生成的代碼
private:
  CRect m_rectUp[MAX];           //存儲上升泡泡的數組
  CRect m_rectDown[MAX];         //存儲下降泡泡的數組
  bool m_boolUp[MAX];            //上升泡泡狀態
  bool m_boolDown[MAX];          //下降泡泡狀態
  int m_intUp;
  int m_intDown;
  int m_intNewBubble;            //0---沒有新泡泡;1---下降泡泡;2---上升泡泡
  CRect m_rectNew;               //最新一個泡泡的位置
};

////(3)在視圖類的構造函數中初始化變量.

CBubbleView:CBubbleView()
{
  m_intUp=0;
  m_intDown=0;
  m_intNewBubble=0;
  for(int i=0;i<MAX;i++)
  {
    m_boolDown[i]=false;
    m_boolup[i]=false;
  }
  stand((unsigned)time(NULL));
}

////(4)程序運行后啟動定時器.

void CBubbleView::OnInitialUpdate()
{
  CView::OnInitialUpdate();
  SetTimer(1,100,NULL);
}

////(5)程序退出時終止定時器.

void CBubbleView::OnDestory()
CView::OnDestory();
KillTimer(1);

////(6)為鼠標消息添加處理函數.

void CBubbleView::OnLButtonDown(UINT nFlags,CPoint point)
{
  CRect rectBound(ORIGINX,ORIGINY,ENDX,ENDY);
  
  if(rectBound.PtInRect(point)&&m_intDown<MAX)    //在區域內
  {
    int intNewRadius=rand()%30+10;
    m_rectNew=CRect(point.x-intNewRadius,point.y-intNewRadius,point.x+intNewRadius,point.y+intNewRadius);
    m_intNewBubble=1;                             //設置標志
  }
  CView::OnLButtonDown(nFlags,point);
}
void CBubbleView::OnRButtonDown(UINT nFlags,CPoint point)
{
  CRect rectBound(ORIGINX,ORIGINY,ENDX,ENDY);
  if(rectBound.PtInRect(point)&&m_intUp<MAX)   
  {
    int intNewRadius=rand()%30+10;
    m_rectNew=CRect(point.x-intNewRadius,point.y-intNewRadius,point.x+intNewRadius,point.y+intNewRadius);
    m_intNewBubble=2;                             
  }
  CView::OnRButtonDown(nFlags,point);
}

////(7)為定時器消息添加處理函數.

void CBubbleView::OnTimer(UNIT nINEvent)
{
  for(int i=1;i<MAX;i++)
  {
    if(m_boolDown[i])                                       //該位置有泡泡
    {
      MyInvalidateRect(m_rectDown[i]);
      m_rectDown[i].top=m_rectDown[i].top-DR+DS;            //移動泡泡
      m_rectDown[i].left=m_rectDown[i].left-DR;
      m_rectDown[i].right=m_rectDown[i].right+DR;
      m_rectDown[i].bottom=m_rectDown[i].bottom+DR+DS;
     
      if(m_rectDown[i].top>ENDY)                            //泡泡消失
      {
        m_rectDown[i]=flase;
        m_intDown--;
      }
      else MyInvalidateRect(m_rectDown[i]);
    }
    else                                                    //空位置 
    {
      if(m_intNewBubble==1)
      {
        m_rectDown[i]=m_rectNew;
        m_intDown++;
        m_intNewBubble=0;                                   //復位
        m_boolDown[i]=true;

        MyInvalidateRect(m_rectNew);
      }
    }
    if(m_boolUp[i])                                         //上升的泡泡
    {
      MyInvalidateRect(m_rectUP[i]);
      m_rectUp[i].top=m_rectUp[i].top-DR-DS;                //移動泡泡
      m_rectUp[i].left=m_rectUp[i].left-DR;
      m_rectUp[i].right=m_rectUp[i].right+DR;
      m_rectUp[i].bottom=m_rectUp[i].bottom+DR-DS;
      if(m_rectUp[i].bottom<ORIGINY)
      {
        m_boolUp[i]=flase;
        m_intUp--;
      }  
      else MyInvalidateRect(m_rectUp[i]);
    }
    else
    {
      if(m_intNewBubble==2)
      {
        m_rectUp[i]=m_rectNew;
        m_intUp++;
        m_intNewBubble=0;                                   //復位
        m_boolDown[i]=true;

        MyInvalidateRect(m_rectNew);        
      }
    }
  }
  //文字區刷新
  InvalidateRect(CRect(ENDX+100,ORIGINY+40,ENDX+250,ORIGINY+100));
  CView::OnTimer(nIDEvent);
}

////(8)修改OnDraw函數顯示泡泡.

void CBubbleView::OnDraw(CDC* pDC)
{  
  CBubbleDoc* pDoc=GetDocument();
  ASSERT_VALID(pDoc);
  //畫矩形框
  pDC->MoveTo(ORIGINX,ORIGINY);
  pDC->LineTo(ORIGINX,ENDY);
  pDC->LineTo(ENDY,ENDY);
  pDC->LineTo(ENDY,ORIGINX);
  pDC->LineTo(ORIGINX,ORIGINX);

  CBrush brushUp(UPCOLOR);
  CBrush* pbrushOld=pDC->SelectObject(&brushUp);
  CBrush brushDown(DOWNCOLOR);
  //畫泡泡
  for(int i=1;i<MAX;i++)
  {
    if(m_boolUp[i])
    {
      pDC->SelectObject(&brushUp);
      pDC->Ellipse(m_rectUp[i]);
    }

    if(m_boolDown[i])
    {
      pDC->SelectObject(&brushDown);
      pDC->Ellipse(m_rectDown[i]);
    }
  }

  CString strOut;
  strOut.Format("上升的泡泡數為　%d",m_intUp);
  pDC->TextOut(ENDX+100,ORIGINX+40,strOut);
  strOut.Format("下降的泡泡數為　%d",m_intDown);
  pDC->TextOut(ENDX+100,ORIGINX+60,strOut);

  pDC->SelectObject(pbrushOld);
}


////(9)添加成員函數MyInvalidateRect.
  
void CBubbleView::MyInvalidateRect(CRect rect rectUpdate)
{
  int intLeft=max(rectUpdate.left,ORIGINX);
  int intTop=max(rectUpdate.top,ORIGINX);
  int intRight=min(rectUpdate.right,ENDX);
  int intBottom=min(rectUpdate.bottom,ENDY);
   
  InvalidateRect(CRect (intLeft,intTop,intRight,intBottom));
}