MFC实战-电子时钟（GDI实现）1

MFC实战-电子时钟（GDI实现）1

表盘类ClockScale设计

头文件设计：

#if !defined(AFX_CLOCKSCALE_H__2AAE7F83_2E6F_4E93_84EE_98026E963141__INCLUDED_)
#define AFX_CLOCKSCALE_H__2AAE7F83_2E6F_4E93_84EE_98026E963141__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// ClockScale.h : header file
//
/////////////////////////////////////////////////////////////////////////////
// CClockScale frame with splitter
#ifndef __AFXEXT_H__
#include 
#define PI 3.1415926;
#endif
class CClockScale 
{ 
protected:
            // protected constructor used by dynamic creation
// Attributes
protected:
public:
 CClockScale();
 COLORREF m_color;
 UINT m_stytle;
 MAJORTYPE m_style;
 CPoint m_ptMiddle;
 UINT m_nPointWidth;
 int m_logColor;
// Operations
public:
// Overrides
 // ClassWizard generated virtual function overrides
 //{{AFX_VIRTUAL(CClockScale)
 //}}AFX_VIRTUAL
// Implementation
public:
 virtual ~CClockScale();
 void CClockScale::SetScaleStyle(MAJORTYPE type);
 void CClockScale::SetScaleColor(COLORREF colorref);
 void CClockScale::SetLogColor(int color);
 MAJORTYPE CClockScale::GetScaleStyle();
 COLORREF CClockScale::GetScaleColor();
 int CClockScale::GetLogColor();
 void CClockScale::DrawScale(CDC *PdC,CPoint &ptMiddle);
 CPoint CClockScale::ComputerFacePoint(UINT min,int nFaceLength);
 void CClockScale::DrawFacePoint(CDC *pDC,const CPoint &ptFace,BOOL bMajor);
 void CClockScale::DrawMajor(CDC *pDC,MAJORTYPE type,CRect rectPoint);
 // Generated message map functions
 //{{AFX_MSG(CClockScale)
  // NOTE - the ClassWizard will add and remove member functions here.
 //}}AFX_MSG
};
/////////////////////////////////////////////////////////////////////////////
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_CLOCKSCALE_H__2AAE7F83_2E6F_4E93_84EE_98026E963141__INCLUDED_)

.cpp文件设计

// ClockScale.cpp : implementation file
//
#include "stdafx.h"
#include "DeskClock.h"
#include "ClockScale.h"
#include 
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CClockScale
CClockScale::CClockScale()
{
 m_color=RGB(0,0,255);
 m_style=TYPE_RECT;
 m_logColor=1;
}
CClockScale::~CClockScale()
{
}
void CClockScale::SetScaleStyle(MAJORTYPE type)
{
 m_style=type;
}
void CClockScale::SetScaleColor(COLORREF colorref)
{
 m_color=colorref;
}
void CClockScale::SetLogColor(int color)
{
 m_logColor=color;
}
MAJORTYPE CClockScale::GetScaleStyle()
{
 return m_style;
}
COLORREF CClockScale::GetScaleColor()
{
 return m_color;
}
int CClockScale::GetLogColor()
{
 return m_logColor;
}
void CClockScale::DrawScale(CDC *pDc,CPoint &ptMiddle)
{
 m_ptMiddle.x=ptMiddle.x;
 m_ptMiddle.y=ptMiddle.y;
 if(m_ptMiddle.y<0)
 {
  m_ptMiddle.y=0;
 }
 UINT nRidius=min(m_ptMiddle.x,m_ptMiddle.y);
 m_nPointWidth=(int)nRidius/20;
 //绘制LOGo
 CBitmap maskbmp,logbmp;
 maskbmp.LoadBitmap(IDB_LOGMASK);
 logbmp.LoadBitmap(IDB_LOG);
 CDC MaskDC,memDC;
 MaskDC.CreateCompatibleDC(pDc);
 MaskDC.SelectObject(&maskbmp);
 memDC.CreateCompatibleDC(pDc);
 memDC.SelectObject(&logbmp);
 if(m_nPointWidth>8)
 {
  if(m_logColor==0)
  {
   pDc->BitBlt(m_ptMiddle.x-25,ptMiddle.y-nRidius*0.7,
    96,96,&MaskDC,0,0,SRCAND);
   pDc->BitBlt(m_ptMiddle.x-25,ptMiddle.y-nRidius*0.7,
    96,96,&MaskDC,0,0,MERGEPAINT);
  }
  else if(m_logColor==1)
  {
   pDc->BitBlt(m_ptMiddle.x-25,ptMiddle.y-nRidius*0.7,
    96,96,&MaskDC,0,0,MERGEPAINT);
   pDc->BitBlt(m_ptMiddle.x-25,ptMiddle.y-nRidius*0.7,
    96,96,&MaskDC,0,0,SRCAND);
  }
 }
 if(m_nPointWidth<2)
 {
  m_nPointWidth=2;
 }
 CPoint ptFace;
 CBrush brPoint(m_color);
 CBrush *pbrOld=pDc->SelectObject(&brPoint);
 int nFaceLength=MulDiv(nRidius,9,10);
 for(int nMin=0;nMin<60;nMin++)
 {
  BOOL bHour=FALSE;
  ptFace=ComputerFacePoint(nMin,nFaceLength);
  if(nMin%5==0)
  {
   bHour=true;
  }
  DrawFacePoint(pDc,ptFace,bHour);
 }
 pDc->SelectObject(pbrOld);
 return;
}
CPoint CClockScale::ComputerFacePoint(UINT min,int nFaceLength)
{
 CPoint ptCalc;
 double fDegrees=180+((15+min)%60)*6;
 double fAngle=fDegrees/180;
 ptCalc.x=m_ptMiddle.x+(int)(cos(fAngle*3.1415926)*nFaceLength);
 ptCalc.y=m_ptMiddle.y+(int)(sin(fAngle*3.1415926)*nFaceLength);
 return(ptCalc);
}
void CClockScale::DrawFacePoint(CDC *pDC,const CPoint &ptFace,BOOL bMajor)
{
 CRect rectPoint(ptFace.x,ptFace.y,ptFace.x,ptFace.y);
 if(bMajor)
 {
  rectPoint.InflateRect((m_nPointWidth/2)+2,(m_nPointWidth/2)+2);
  DrawMajor(pDC,m_style,rectPoint);
 }
 else
 {
  if(m_nPointWidth>2)
  {
  rectPoint.InflateRect(1,1);
  pDC->Draw3dRect(&rectPoint,GetSysColor(COLOR_BTNHIGHLIGHT),GetSysColor(COLOR_BTNSHADOW));
  }
 }
 return;
}
void CClockScale::DrawMajor(CDC *pDC,MAJORTYPE type,CRect rectPoint)
{
 CPen *oldPen;
 CPoint ptRhombus[4];
 CPen penBorder(PS_SOLID,1,RGB(255,255,255));
 switch(type)
 {
 case TYPE_ELLIPSE:
  pDC->Ellipse(rectPoint);
  break;
 case TYPE_RECT:
  pDC->Rectangle(&rectPoint);
  pDC->Draw3dRect(&rectPoint,GetSysColor(COLOR_BTNHIGHLIGHT),GetSysColor(COLOR_BTNSHADOW));
  break;
 case TYPE_RHOMBUS:
  oldPen=pDC->SelectObject(&penBorder);
  ptRhombus[1].x=rectPoint.left+rectPoint.Width()/2;
  ptRhombus[1].y=rectPoint.top;
  ptRhombus[0].x=rectPoint.left;
  ptRhombus[0].y=rectPoint.top+rectPoint.Height()/2;
  ptRhombus[3].x=rectPoint.left+rectPoint.Width()/2;
  ptRhombus[3].y=rectPoint.bottom;
  ptRhombus[2].x=rectPoint.right;
  ptRhombus[2].y=rectPoint.top+rectPoint.Height()/2;
  pDC->Polygon(ptRhombus,4);
  pDC->SelectObject(oldPen);
  break;
 case TYPE_TRIANGLE:
  oldPen=pDC->SelectObject(&penBorder);
  ptRhombus[0].x=rectPoint.left;
  ptRhombus[0].y=rectPoint.top+rectPoint.Height()/2;
  ptRhombus[1].x=rectPoint.left+rectPoint.Width()/2;
  ptRhombus[1].y=rectPoint.top;
  ptRhombus[2].x=rectPoint.right;
  ptRhombus[2].y=rectPoint.top+rectPoint.Height()/2;
  pDC->Polygon(ptRhombus,3);
  pDC->SelectObject(oldPen);
  break;
 }
}
/////////////////////////////////////////////////////////////////////////////
// CClockScale message handlers

主窗口OnPaint()调用实现效果

CRect rectClient;
 CPoint m_pMiddle;
 GetClientRect(&rectClient);
 CPaintDC dc(this);
 CDC memDC;
 memDC.CreateCompatibleDC(&dc);
 CBitmap bmp;
 //创建于设备兼容的位图，大小同客户区一样
 bmp.CreateCompatibleBitmap(&dc,rectClient.Width(),rectClient.Height());
 //将位图选入内存设备
 memDC.SelectObject(&bmp);
 //填充背景色
 CBrush bkBrush(m_colorBk);
 memDC.FillRect(&rectClient,&bkBrush);
 //时钟参数
 m_pMiddle.x=rectClient.Width()/2;
 m_pMiddle.y=rectClient.Height()/2-15;
 m_nRidius=min(m_pMiddle.x,m_pMiddle.y);
 m_nPointWidth=(int)m_nRidius/20;
 //绘制表盘
 m_ClockScale.DrawScale(&memDC,m_pMiddle);
 //
 //m_oTime=CTime::GetCurrentTime();
 //int m_nMinute=m_oTime.GetMinute();
 //m_ClockHand.DrawHand(&memDC,m_nMinute,MINUTE_HAND,m_pMiddle,m_oTime);
 dc.StretchBlt(0,0,rectClient.Width(),rectClient.Height(),&memDC,0,0,rectClient.Width(),
  rectClient.Height(),SRCCOPY);

表盘绘制效果：