VC windows SDK 时钟界面屏幕保护程序

//此文件为整个程序的关键文件，主要的事情都在此文件中实现 #include "CWndClock.h" MyClock::MyClock() //初始化指针数据 { //定位表盘中心位置 center.x = GetSystemMetrics(SM_CXSCREEN)/2; center.y = GetSystemMetrics(SM_CYSCREEN)/2; //表盘半径 radius = center.x > center.y ? center.y : center.x; radius = radius - 40; //获取当前系统时间从而初始化各表针的位置 GetLocalTime(&s_Time); angle = (double)(s_Time.wSecond * 6 * 2 * PI/360); //初始化秒针针柄坐标 second[0].x = center.x + (int)((radius/8) * sin(angle+PI)); second[0].y = center.y - (int)((radius/8) * cos(angle+PI)); //初始化秒针针尖坐标 second[1].x = center.x + (int)((radius-20) * sin(angle)); second[1].y = center.y - (int)((radius-20) * cos(angle)); //初始化秒针前一个位置 oldSecond[0].x = second[0].x; oldSecond[0].y = second[0].y; oldSecond[1].x = second[1].x; oldSecond[1].y = second[1].y; angle = (double)(s_Time.wMinute * 6 * 2 * PI/360) + ((double)s_Time.wSecond/(double)60) * 6 *2 * PI/360; //初始化分针针柄坐标需考虑秒针的影响 minute[0].x = center.x + (int)((radius/10) * sin(angle+PI)); minute[0].y = center.y - (int)((radius/10) * cos(angle+PI)); //初始化分针针尖坐标 minute[1].x = center.x + (int)((radius-60) * sin(angle)); minute[1].y = center.y - (int)((radius-60) * cos(angle)); //初始化分针前一个位置 oldMinute[0].x = minute[0].x; oldMinute[0].y = minute[0].y; oldMinute[1].x = minute[1].x; oldMinute[1].y = minute[1].y; angle = (double)((s_Time.wHour%12) * 30 * 2 * PI/360) + ((double)s_Time.wMinute/(double)60) * 30 * 2 * PI/360; //初始化时针针柄坐标需考虑分针的影响忽略掉秒针的影响 hour[0].x = center.x + (int)((radius/12) * sin(angle+PI)); hour[0].y = center.y - (int)((radius/12) * cos(angle+PI)); //初始化时针针尖坐标 hour[1].x = center.x + (int)((radius-100) * sin(angle)); hour[1].y = center.y - (int)((radius-100) * cos(angle)); //初始化时针前一个位置 oldHour[0].x = hour[0].x; oldHour[0].y = hour[0].y; oldHour[1].x = hour[1].x; oldHour[1].y = hour[1].y; } void MyClock::Draw(HDC hdc) //绘制表盘刻度只调用一次 { int i; HPEN pen1,pen2; pen1 = CreatePen(PS_SOLID,5,RGB(255,255,0)); SelectObject(hdc,pen1); Ellipse(hdc,center.x-5,center.y-5,center.x+5,center.y+5); //绘制表盘中心点 //绘制刻度 for(i=0;i<60;i++) { if(i%5 == 0) continue; angle = (double)(i * 6 * 2 *PI/360); mark.x = center.x + (int)(radius * sin(angle)); mark.y = center.y - (int)(radius * cos(angle)); Ellipse(hdc,mark.x-5,mark.y-5,mark.x+5,mark.y+5); } //以矩形绘制整点刻度 pen2 = CreatePen(PS_SOLID,5,RGB(0,128,255)); SelectObject(hdc,pen2); for(i=0;i<12;i++) { angle = (double)(i * 30 * 2 *PI/360); mark.x = center.x + (int)(radius * sin(angle)); mark.y = center.y - (int)(radius * cos(angle)); Rectangle(hdc,mark.x-5,mark.y-5,mark.x+5,mark.y+5); } //释放画笔 DeleteObject(pen1); DeleteObject(pen2); } void MyClock::RunClock(HDC hdc,int r_Hour,int r_Minute,int r_Second) //运行时钟 { HPEN secondPen; //用于绘制当前位置秒针的画笔 HPEN minutePen; //用于绘制当前位置分针的画笔 HPEN hourPen; //用于绘制当前位置时针的画笔 HPEN oldPen,clearPen; //用于擦除前一位置表针的画笔 HPEN centerPen; //用于绘制表盘中心点 //记录各表针的前一个位置 oldHour[0].x = hour[0].x; oldHour[0].y = hour[0].y; oldHour[1].x = hour[1].x; oldHour[1].y = hour[1].y; oldMinute[0].x = minute[0].x; oldMinute[0].y = minute[0].y; oldMinute[1].x = minute[1].x; oldMinute[1].y = minute[1].y; oldSecond[0].x = second[0].x; oldSecond[0].y = second[0].y; oldSecond[1].x = second[1].x; oldSecond[1].y = second[1].y; //定位当前各表针的位置 angle = (double)(r_Second * 6 * 2 * PI/360); second[0].x = center.x + (int)((radius/8) * sin(angle+PI)); second[0].y = center.y - (int)((radius/8) * cos(angle+PI)); second[1].x = center.x + (int)((radius-20) * sin(angle)); second[1].y = center.y - (int)((radius-20) * cos(angle)); angle = (double)(r_Minute * 6 * 2 * PI/360) + ((double)r_Second/(double)60) * 6 *2 * PI/360; minute[0].x = center.x + (int)((radius/10) * sin(angle+PI)); minute[0].y = center.y - (int)((radius/10) * cos(angle+PI)); minute[1].x = center.x + (int)((radius-60) * sin(angle)); minute[1].y = center.y - (int)((radius-60) * cos(angle)); angle = (double)((r_Hour%12) * 30 * 2 * PI/360) + ((double)r_Minute/(double)60) * 30 * 2 * PI/360; hour[0].x = center.x + (int)((radius/12) * sin(angle+PI)); hour[0].y = center.y - (int)((radius/12) * cos(angle+PI)); hour[1].x = center.x + (int)((radius-100) * sin(angle)); hour[1].y = center.y - (int)((radius-100) * cos(angle)); //擦除前一位置指针 clearPen = CreatePen(PS_SOLID,2,RGB(0,0,0)); oldPen = (HPEN)SelectObject(hdc,clearPen); MoveToEx(hdc,oldSecond[0].x,oldSecond[0].y,NULL); LineTo(hdc,oldSecond[1].x,oldSecond[1].y); MoveToEx(hdc,oldMinute[0].x,oldMinute[0].y,NULL); LineTo(hdc,oldMinute[1].x,oldMinute[1].y); MoveToEx(hdc,oldHour[0].x,oldHour[0].y,NULL); LineTo(hdc,oldHour[1].x,oldHour[1].y); //绘制表盘中心点 centerPen = CreatePen(PS_SOLID,5,RGB(255,255,0)); SelectObject(hdc,centerPen); Ellipse(hdc,center.x-5,center.y-5,center.x+5,center.y+5); //绘制当前位置指针 hourPen = CreatePen(PS_SOLID,2,RGB(0,0,255)); SelectObject(hdc,hourPen); MoveToEx(hdc,hour[0].x,hour[0].y,NULL); LineTo(hdc,hour[1].x,hour[1].y); minutePen = CreatePen(PS_SOLID,2,RGB(0,255,0)); SelectObject(hdc,minutePen); MoveToEx(hdc,minute[0].x,minute[0].y,NULL); LineTo(hdc,minute[1].x,minute[1].y); secondPen = CreatePen(PS_SOLID,2,RGB(255,0,0)); SelectObject(hdc,secondPen); MoveToEx(hdc,second[0].x,second[0].y,NULL); LineTo(hdc,second[1].x,second[1].y); //释放画笔对象 SelectObject(hdc,oldPen); DeleteObject(clearPen); DeleteObject(centerPen); DeleteObject(hourPen); DeleteObject(minutePen); DeleteObject(secondPen); }