用了invalidaterect绘制图形别的消息不响应？新手求解

listrang 2011-09-18 04:20:30

本人vc 新手求解各路大牛
找了一段旋转风车的代码试着改点代码
可添加了别的消息例如按键 WM_LBUTTONDOWN 没有相应只有把invalidaterect 去掉了才响应求解方法怎么样能在风车转的情况下添加别的信息下面是风车自己改的代码

#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define Pi 3.1415926

LRESULT CALLBACK WINAPI WndProc(HWND hWnd,
UINT iMessage,
UINT wParam,
LONG lParam); //消息处理函数声明.
int nNum = 0,nMaxNum = 20; //nMaxNum记录了叶片循环一周中绘图的次数.
//nNum记录了当前的序数.

int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow) //主函数
{
MSG Message; //定义消息变量.
HWND hWnd; //定义窗口句柄.

WNDCLASS WndClass; //定义窗口类.
WndClass.cbClsExtra=0; //无窗口类扩展.
WndClass.cbWndExtra=0; //无窗口实例扩展.
WndClass.hbrBackground=(HBRUSH)(GetStockObject(WHITE_BRUSH));//背景为白色.
WndClass.hCursor=LoadCursor(NULL,IDC_ARROW); //窗口采用箭头光标.
WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION); //采用缺省图标.
WndClass.hInstance=hInstance; //当前应用程序句柄.
WndClass.lpfnWndProc=WndProc; //窗口处理函数.
WndClass.lpszClassName="4_8"; //窗口类名称.
WndClass.lpszMenuName=NULL; //无窗口菜单.
WndClass.style=0; //窗口类型为缺省类型.

if(!RegisterClass(&WndClass)) //注册窗口.
{
MessageBeep(0);
return FALSE;
}

hWnd=CreateWindow("4_8", //窗口类名.
"4_8", //标题名.
WS_OVERLAPPEDWINDOW, //带标题栏,最大和最小按钮的窗口.
CW_USEDEFAULT, //窗口左上角坐标.
0,
600, //采用宽度为450，高度为600.
450,
NULL, //无父窗口.
NULL, //无主菜单.
hInstance, //当前实例句柄.
NULL); //不要此参数.
ShowWindow(hWnd,nCmdShow); //显示窗口.
UpdateWindow(hWnd); //更新并绘制用户区.

while(GetMessage(&Message,0,0,0))
{
TranslateMessage(&Message); //消息循环.
DispatchMessage(&Message);
}
return Message.wParam;
}

LRESULT CALLBACK WINAPI WndProc(HWND hWnd,
UINT iMessage,
UINT wParam,
LONG lParam) //消息处理函数.
{

HBRUSH hBrush; //定义画刷句柄
HPEN hPen; //定义画笔句柄
//定义包含绘图信息的结构体变量
int nCentreX,nCentreY; //定义3个叶片的圆心的坐标.
double fAngle;

switch(iMessage)
{
case WM_PAINT:
PAINTSTRUCT PtStr;
HDC hDC; //处理绘图消息.
hDC=BeginPaint(hWnd,&PtStr); //获得设备环境指针.
SetMapMode(hDC,MM_ANISOTROPIC); //设置映射模式.
SetWindowExtEx(hDC,300,400,NULL); //设置窗口区域.逻辑单位.
SetViewportExtEx(hDC,600,450,NULL); //设置视口区域.物理单位.
SetViewportOrgEx(hDC,300,200,NULL); //设置视口原点坐标为(300,200).物理单位.
//绘制外圆。
TextOut(hDC,-150,-170,"PS:按下鼠标左键，风车加束.",strlen("PS:按下鼠标左键，风车加束."));
TextOut(hDC,-150,-150,"PS:按下鼠标右键，风车加束.",strlen("PS:按下鼠标右键，风车加束."));
hPen = (HPEN)GetStockObject(BLACK_PEN);
SelectObject(hDC,hPen);
Ellipse(hDC,-100,-100,100,100);
//绘制风车的叶片。
hBrush = CreateSolidBrush(RGB(255,0,0)); //画红色的叶片.
SelectObject(hDC,hBrush);
fAngle = 2*Pi/nMaxNum*nNum;
nCentreX = (int)(50*cos(fAngle));
nCentreY = (int)(50*sin(fAngle));
Pie(hDC,nCentreX-50,nCentreY-50,
nCentreX+50,nCentreY+50,
(int)(nCentreX+50*cos(fAngle)),(int)(nCentreY+50*sin(fAngle)),
(int)(nCentreX+50*cos(fAngle+Pi)),(int)(nCentreY+50*sin(fAngle+Pi)));
hBrush = CreateSolidBrush(RGB(255,255,0)); //画天蓝色的叶片.
SelectObject(hDC,hBrush);
nCentreX = (int)(50*cos(fAngle+2*Pi/3));
nCentreY = (int)(50*sin(fAngle+2*Pi/3));
Pie(hDC,nCentreX-50,nCentreY-50,
nCentreX+50,nCentreY+50,
(int)(nCentreX+50*cos(fAngle+2*Pi/3)),(int)(nCentreY+50*sin(fAngle+2*Pi/3)),
(int)(nCentreX+50*cos(fAngle+Pi+2*Pi/3)),(int)(nCentreY+50*sin(fAngle+Pi+2*Pi/3)));
hBrush = CreateSolidBrush(RGB(0,255,255)); //画黄色的叶片.
SelectObject(hDC,hBrush);
nCentreX = (int)(50*cos(fAngle+4*Pi/3));
nCentreY = (int)(50*sin(fAngle+4*Pi/3));
Pie(hDC,nCentreX-50,nCentreY-50,
nCentreX+50,nCentreY+50,
(int)(nCentreX+50*cos(fAngle+4*Pi/3)),(int)(nCentreY+50*sin(fAngle+4*Pi/3)),
(int)(nCentreX+50*cos(fAngle+Pi+4*Pi/3)),(int)(nCentreY+50*sin(fAngle+Pi+4*Pi/3)));

nNum++; //当前序数加1.
Sleep(100); //等待0.1秒.
InvalidateRect(hWnd,NULL,1); //重绘窗口区域.

EndPaint(hWnd,&PtStr); //释放环境指针。
break;

case WM_LBUTTONDOWN:
//MessageBox(hWnd,"mouse clicked","嘎嘎",0);
HDC hdc;
hdc=GetDC(hWnd);
TextOut(hdc,0,50,"风来了。。。",strlen("风来了。。。"));
ReleaseDC(hWnd,hdc);
break;

break;
case WM_CLOSE:
if(IDYES==MessageBox(hWnd,"是否真的结束？","weixin",MB_YESNO))
{
DestroyWindow(hWnd);
}
break;
case WM_DESTROY://关闭窗口
PostQuitMessage(0);
break;
default:
return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}
return 0;
}

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