#include <windows.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 main(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 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, 0, 0,
GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN),
NULL, NULL, hInstance, NULL)
ShowWindow (hwnd, SW_SHOWMAXIMIZED) //最大化显示 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 = '\0';
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 = '\0';
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) }
