#include <windows.h>#include <windowsx.h>#define ID_TIMER 1#define STRMAXLEN 25 //一个显示列的最大长度#define STRMINLEN 8 //一个显示列的最小长度LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////typedef struct tagCharChain //整个当作屏幕的一个显示列,这是个双向列表{
struct tagCharChain *prev;
//链表的前个元素 TCHAR ch;
//一个显示列中的一个字符 struct tagCharChain *next;
//链表的后个元素}
CharChain, *pCharChain;
typedef struct tagCharColumn{
CharChain *head, *current, *point;
int x, y, iStrLen;
//显示列的开始显示的x,y坐标,iStrLen是这个列的长度 int iStopTimes, iMustStopTimes;
//已经停滞的次数和必须停滞的次数,必须停滞的次数是随机的}
CharColumn, *pCharColumn;
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow){
static TCHAR szAppName[] = TEXT ("matrix") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;
wndclass.style = CS_HREDRAW | CS_VREDRAW ;
// class style wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;
if(!RegisterClass (&wndclass)) {
MessageBox (NULL, TEXT ("此程序必须运行在NT下!"), szAppName, MB_ICONERROR) ;
return 0;
}
hwnd = CreateWindow (szAppName, NULL, WS_DLGFRAME | WS_THICKFRAME | WS_POPUP, // windows style 0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN), NULL, NULL, hInstance, NULL) ;
ShowWindow (hwnd, SW_SHOWMAXIMIZED) ;
//最大化显示 show windows UpdateWindow (hwnd) ;
ShowCursor(FALSE);
//隐藏鼠标光标 srand ((int) GetCurrentTime ()) ;
//初始化随机数发生器 while (GetMessage (&msg, NULL, 0, 0)) {
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
ShowCursor(TRUE);
//显示鼠标光标 return msg.wParam ;
}
TCHAR randomChar() //随机字符产生函数{
return (TCHAR)(rand()%(126-33)+33);
//33到126之间}
int init(CharColumn *cc, int cyScreen, int x) //初始化{
int j;
cc->iStrLen = rand()%(STRMAXLEN-STRMINLEN) + STRMINLEN;
//显示列的长度 cc->x = x+3 ;
//显示列的开始显示的x坐标 cc->y =rand()%3?rand()%cyScreen:0;
//显示列的开始显示的y坐标 cc->iMustStopTimes = rand()%6 ;
cc->iStopTimes = 0 ;
cc->head = cc->current = (pCharChain)calloc(cc->iStrLen, sizeof(CharChain));
//生成显示列 for(j=0;
j<cc->iStrLen-1;
j++) {
cc->current->prev = cc->point;
//cc->point一个显示列的前个元素 cc->current->ch = '';
cc->current->next = cc->current+1;
//cc->current+1一个显示列的后个元素 cc->point = cc->current++;
//cc->point = cc->current;
cc->current++;
}
cc->current->prev = cc->point;
//最后一个节点 cc->current->ch = '';
cc->current->next = cc->head;
cc->head->prev = cc->current;
//头节点的前一个为此链的最后一个元素 cc->current = cc->point = cc->head;
//free掉申请的内存要用current当参数 cc->head->ch = randomChar();
// 对链表头的 元素填充 return 0;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){
HDC hdc ;
//ctn 用来确定一个显示链是否 向下前进,如果等待次数超过必须等待的次数,ctn就代表要向下前进 int i, j, temp, ctn;
//j为一个显示链中除链表头外的在屏幕上显示的y坐标,temp绿色过度到黑色之用 static HDC hdcMem;
HFONT hFont;
static HBITMAP hBitmap;
static int cxScreen, cyScreen;
//屏幕的宽度 高度. static int iFontWidth=10, iFontHeight=15, iColumnCount;
//字体的宽度 高度, 列数 static CharColumn *ccChain;
switch (message) {
case WM_CREATE: cxScreen = GetSystemMetrics(SM_CXSCREEN) ;
//屏幕宽度 cyScreen = GetSystemMetrics(SM_CYSCREEN) ;
SetTimer (hwnd, ID_TIMER, 10, NULL) ;
hdc = GetDC(hwnd);
hdcMem = CreateCompatibleDC(hdc);
hBitmap = CreateCompatibleBitmap(hdc, cxScreen, cyScreen);
SelectObject(hdcMem, hBitmap);
ReleaseDC(hwnd, hdc);
//创建字体 hFont = CreateFont(iFontHeight, iFontWidth-5, 0, 0, FW_BOLD, 0, 0, 0, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DRAFT_QUALITY, FIXED_PITCH | FF_SWISS, TEXT("Fixedsys"));
SelectObject(hdcMem, hFont);
DeleteObject (hFont) ;
SetBkMode(hdcMem, TRANSPARENT);
//设置背景模式为 透明 iColumnCount = cxScreen/(iFontWidth*3/2);
//屏幕所显示字母雨的列数 ccChain = (pCharColumn)calloc(iColumnCount, sizeof(CharColumn));
for(i=0;
i<iColumnCount;
i++) {
init(ccChain+i, cyScreen, (iFontWidth*3/2)*i);
}
return 0 ;
case WM_TIMER: hdc = GetDC(hwnd);
PatBlt (hdcMem, 0, 0, cxScreen, cyScreen, BLACKNESS) ;
//将内存设备映像刷成黑色 for(i=0;
i<iColumnCount;
i++) {
ctn = (ccChain+i)->iStopTimes++ > (ccChain+i)->iMustStopTimes;
// (ccChain+i)->point = (ccChain+i)->head;
//point用于遍历整个显示列 //第一个字符显示为 白色 SetTextColor(hdcMem, RGB(255, 255, 255));
TextOut(hdcMem, (ccChain+i)->x, (ccChain+i)->y, &((ccChain+i)->point->ch), 1);
j = (ccChain+i)->y;
(ccChain+i)->point = (ccChain+i)->point->next;
//遍历整个显示列,将这个显示列里的字符从下往上显示 temp = 0 ;
//temp绿色过度到黑色之用 while((ccChain+i)->point != (ccChain+i)->head && (ccChain+i)->point->ch) {
SetTextColor(hdcMem, RGB(0, 255-(255*(temp++)/(ccChain+i)->iStrLen), 0));
TextOut(hdcMem, (ccChain+i)->x, j-=iFontHeight, &((ccChain+i)->point->ch), 1);
(ccChain+i)->point = (ccChain+i)->point->next;
}
if(ctn) (ccChain+i)->iStopTimes = 0 ;
else continue;
(ccChain+i)->y += iFontHeight;
//下次开始显示的y坐标 为当前的y坐标加上 一个字符的高度 //如果开始显示的y坐标减去 整个显示列的长度超过了屏幕的高度 if( (ccChain+i)->y-(ccChain+i)->iStrLen*iFontHeight > cyScreen) {
free( (ccChain+i)->current );
init(ccChain+i, cyScreen, (iFontWidth*3/2)*i);
}
//链表的头 为此链表的前个元素,因为下次开始显示的时候 就相当与在整个显示列的开头添加个元素,然后在开始往上显示 (ccChain+i)->head = (ccChain+i)->head->prev;
(ccChain+i)->head->ch = randomChar();
}
BitBlt(hdc, 0, 0, cxScreen, cyScreen, hdcMem, 0, 0, SRCCOPY);
ReleaseDC(hwnd, hdc);
return 0;
case WM_RBUTTONDOWN: KillTimer (hwnd, ID_TIMER) ;
return 0;
case WM_RBUTTONUP: SetTimer (hwnd, ID_TIMER, 10, NULL) ;
return 0;
//处理善后工作 case WM_KEYDOWN: case WM_LBUTTONDOWN: case WM_DESTROY: KillTimer (hwnd, ID_TIMER) ;
DeleteObject(hBitmap);
DeleteDC(hdcMem);
for(i=0;
i<iColumnCount;
i++) {
free( (ccChain+i)->current );
}
free(ccChain);
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}