2023年7月11日发(作者：)

中年⼈学C语⾔Windows程序设计，35WIN32图形界⾯⾳乐播放器实例代码1中年⼈学C语⾔Windows程序设计，35 WIN32图形界⾯⾳乐播放器利⽤菜单类，滑块类，静态⽂本框构建⼀个⾳乐播放器，只能每次打开⼀个⽂件播放，下⼀期⽂章会加⼊播放列表。⾳乐播放器V1版本界⾯如下界⾯设计的思路⽤menu构建出⼀个菜单，菜单上有5个功能界⾯如上， 菜单栏有 打开，播放，暂停，停⽌和退出 5个菜单然后在⽤户区显⽰播放信息第⼀⾏为 播放进度信息，最左侧 ⽤static静态⽂本显⽰播放时间，中间 ⽤TRACKBAR_CLASS显⽰播放进度，最右 侧static静态⽂本显⽰⽂件总⼤⼩，下侧 ⽤显⽰⽂件名称。如下图：点击打开⽂件 选择 ⾳频⽂件打开⽂件后，点击播放 开始播放⽂件拖动进度条可以 改变⾳乐播放位置。代码实例8293637383946//窗⼝调⽤程序LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){ HDC hdc; HDC hdcStatic;//字体句柄 PAINTSTRUCT ps; //HINSTANCE hInst; RECT rect; TEXTMETRIC tm;//TEXTMETRIC

结构记录当前设备环境中有关字体的各种信息。

static TCHAR szBuffer[1024] = { 0 }; static TCHAR szBufInfo[1024] = { 0 };//缓存 static TCHAR szBufPos[1024]={ 0 };//缓存 static TCHAR szCmdPos; //static TCHAR szStatusPre[1024] = { 0 }; //size_t iLength;//字符串长度 static long int llen;

static int m, s,mi,si; static int cxChar, cHeighChar; static HFONT hFont;//字体 static HWND hStatic, hStatus, hStatusPre;//静态⽂本框 static int cxClient, cyClient, cExternalLeading; static HBRUSH hBrush; //画刷 static OPENFILENAME ofn;//openfilename static HWND hwndPB, hSlider;//进度条 static TCHAR szFile[MAX_PATH]; static TCHAR slen[100]; TCHAR sPos[100]; long int lPos; //TCHAR szCmd[1024]; static int flag = 0; long int sliderPos; switch (message) { case WM_SIZE: {

hdc = GetDC(hWnd); cxClient = LOWORD(lParam); cyClient = HIWORD(lParam);

//ShowWindow(hStatus, SW_HIDE); //解决静态static

⽂本重影的问题 //GetClientRect(hWnd, &rect); MoveWindow(//拖动⼤⼩，改变进度条位置 hSlider, 6 * cxChar, 0, cxClient - 12 * cxChar, cHeighChar*3/2 , TRUE);4647484956575859666768697677787986878889969798991 TRUE);

MoveWindow(//拖动⼤⼩，改变位置 hStatusPre, 0, 0, 6 * cxChar, cHeighChar, TRUE); MoveWindow(//拖动⼤⼩，改变位置 hStatus, cxClient-6 * cxChar, 0, 6 * cxChar, cHeighChar, TRUE); MoveWindow(//拖动⼤⼩，改变条位置 hStatic, 0, 2*cHeighChar, cxClient, cyClient, TRUE);

ReleaseDC(hWnd, hdc);

UpdateWindow(hWnd);//改变⼤⼩后更新窗⼝ break; } case WM_CREATE: {

//创建字体微软雅⿊ hFont = CreateFont( -14/*⾼度*/, -7/*宽度*/, 0, 0, 400 /*⼀般这个值设为400*/, FALSE/*不带斜体*/, FALSE/*不带下划线*/, FALSE/*不带删除线*/, DEFAULT_CHARSET, //使⽤默认字符集 OUT_CHARACTER_PRECIS, CLIP_CHARACTER_PRECIS, //这⾏参数不⽤管 DEFAULT_QUALITY, //默认输出质量 FF_DONTCARE, //不指定字体族*/ TEXT("微软雅⿊")); //字体名 // //InitCommonControls(); //

确保已注册了进度条类PROGRESS_CLASS hSlider = CreateWindow(TRACKBAR_CLASS, TEXT("Trackbar Control"), WS_CHILD | WS_VISIBLE | TBS_AUTOTICKS | TBS_BOTTOM, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, hWnd, NULL, ((LPCREATESTRUCT)lParam)->hInstance ,NULL); SendMessage(hSlider, TBM_SETRANGE,TRUE,MAKELONG(0, 100)); //

设置min. & max. positions

SendMessage(hSlider, TBM_SETPAGESIZE, 0, (LPARAM)5); //设置步长

//SendMessage(hSlider, TBM_SETTICFREQ, 10, 0); // new page size

SendMessage(hSlider, TBM_SETPOS,(WPARAM)TRUE, (LPARAM)0); //初始滑块位置 // redraw flag

//播放位置⽂字框 hStatusPre = CreateWindow( TEXT("static"), //静态⽂本框的类名 szBufPos, //控件的⽂本 WS_CHILD /*⼦窗⼝*/ | WS_VISIBLE /*创建时显⽰*/ | SS_LEFT | SS_LEFTNOWORDWRAP/*垂直居中*/, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, hWnd, //⽗窗⼝句柄 (HMENU)1, //为控件指定⼀个唯⼀标识符 (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE), //当前程序实例句柄 NULL); //⾳频⼤⼩⽂字框 hStatus = CreateWindow( TEXT("static"), //静态⽂本框的类名 szBufInfo, //控件的⽂本 WS_CHILD /*⼦窗⼝*/ | WS_VISIBLE /*创建时显⽰*/ | SS_LEFT | SS_LEFTNOWORDWRAP/*垂直居中*/, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, hWnd, //⽗窗⼝句柄4864864864175176 hWnd, //⽗窗⼝句柄 (HMENU)1, //为控件指定⼀个唯⼀标识符 (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE), //当前程序实例句柄 NULL); //⾳频⽂件⽂字框 hStatic = CreateWindow( TEXT("static"), //静态⽂本框的类名 szBuffer, //控件的⽂本 WS_CHILD /*⼦窗⼝*/ | WS_VISIBLE /*创建时显⽰*/ | SS_LEFT | SS_LEFTNOWORDWRAP/*垂直居中*/, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, hWnd, //⽗窗⼝句柄 (HMENU)2, //为控件指定⼀个唯⼀标识符 (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE), //当前程序实例句柄 NULL); SendMessageW(hStatusPre, WM_SETFONT, (WPARAM)hFont, (LPARAM)NULL); SendMessageW(hStatus, WM_SETFONT, (WPARAM)hFont, (LPARAM)NULL); SendMessageW(hStatic, WM_SETFONT, (WPARAM)hFont, (LPARAM)NULL); SetWindowText(hStatusPre, TEXT(" 00:00 ")); SetWindowText(hStatus, TEXT(" 00:00 ")); SetWindowText(hStatic, TEXT("欢迎使⽤⾳乐播放器"));

hdc = GetDC(hWnd); //创建画刷 hBrush = CreateSolidBrush(RGB(0x00, 0x00, 0x00)); //⿊⾊ GetTextMetrics(hdc, &tm);//GetTextMetrics

函数将当前字体的信息填充到指定缓冲区 cxChar = harWidth;//字体中⼩写字符的平均宽度（⼀般定义为字母 x

的宽度） //cHeighChar = ht + rnalLeading; cHeighChar = ht+ rnalLeading;//字符⾼度（tmAscent + tmDescent）

//打开openfile

ZeroMemory(&ofn, sizeof(ofn));//C语⾔中，结构体声明后必须要进⾏初始化结构体 tSize = sizeof(ofn); ile = szFile;//打开的⽂件的全路径 ile[0] = TEXT('0'); le = sizeof(szFile); ilter = TEXT("mp30*.mp30所有0*.*0");//格式 rIndex = 1; ileTitle = NULL; leTitle = 0; nitialDir = NULL; ner = hWnd; = OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

ReleaseDC(hWnd, hdc); SetTimer(hWnd, ID_TIMER, 1000, NULL);//设置计时器 break; } case WM_HSCROLL://点击进度条

sliderPos = SendMessage(hSlider, TBM_GETPOS, 0, 0);//获取当前位置 int msliderPos = sliderPos / 60; int ssliderPos = sliderPos % 60; TCHAR newCmd[100]; wsprintf(newCmd, TEXT("play sound from %ld"), sliderPos*1000); mciSendString(newCmd, NULL, 0, NULL);//播放到当前位置 break;

case WM_PAINT://绘制⽤户区内的⽂字 hdc = BeginPaint(hWnd, &ps);//BeginPaint

函数为指定窗⼝进⾏绘画作准备，并⽤将和绘画有关的信息填充到⼀个 PAINTSTRUCT

结构中。

GetClientRect(hWnd, &rect); int x = ; int y = ;

EndPaint(hWnd, &ps); //ReleaseDC(hWnd, hdc);975922224225226227228229234235236237238239240241 //ReleaseDC(hWnd, hdc); break; case WM_CTLCOLORSTATIC://设置静态⽂本框颜⾊ hdcStatic = (HDC)wParam; SetTextColor(hdcStatic, RGB(255, 255, 255)); //字体⽩⾊ SetBkMode(hdcStatic, OPAQUE); //透明背景 SetBkColor(hdcStatic, RGB(0, 0, 0)); //设置字体背景为翠绿⾊ return (INT_PTR)hBrush; //这⾥必须返回画刷句柄 case WM_COMMAND: {

switch (LOWORD(wParam)) { case IDM_OPEN: { ExitMusic(fileName); if (OpenMusic(ofn,fileName)) {

lstrcpy(szBuffer, fileName); SetWindowText(hStatic, fileName); llen = GetInfo(fileName); m = llen / 60;//分 s = llen % 60;//秒 wsprintf(szBufInfo, TEXT(" %02d:%02d "),m,s); SetWindowText(hStatus, szBufInfo); //显⽰⽂件总时长 SetWindowText(hStatusPre, TEXT(" 00:00 "));//显⽰当前播放位置 SendMessage(hSlider, TBM_SETRANGE, TRUE, MAKELONG(0, llen)); //重新设置范围 min. & max. positions

} break; }

case IDM_PLAY: { flag =PlayMusic(fileName);

break; } case IDM_PAUSE: { PauseMusic(fileName); break;

} case IDM_STOP: StopMusic(fileName); break;

case IDM_EXIT: {

if (MessageBox(hWnd, TEXT("是否退出播放器"), TEXT(""), MB_YESNO | MB_ICONQUESTION) == IDYES) ExitMusic(fileName); SendMessage(hWnd, WM_CLOSE, 0, 0); break; }

} break;

}

break; case WM_TIMER://定时器程序每秒获取⼀次播放信息 { if (flag) { mciSendString(TEXT("status sound position"), sPos, 100, 0); lPos = _wtoi(sPos) / 1000;//测量出媒体长度，单位为秒，需要转化

SendMessage(hSlider, TBM_SETRANGE, TRUE, MAKELPARAM(0, llen)); //设置进度条的范围 SendMessage(hSlider, TBM_SETPOS, TRUE, lPos); //设置进度2445246247248249254255256257258259264265266267268269 SendMessage(hSlider, TBM_SETPOS, TRUE, lPos); //设置进度 mi = lPos / 60;//分 si = lPos % 60;//秒 wsprintf(szBufPos, TEXT(" %02d:%02d "), mi, si); SetWindowText(hStatusPre, szBufPos);//显⽰当前位置 } }

break;

case WM_CLOSE: { PostQuitMessage(0); } break; case WM_DESTROY: { DeleteObject(hBrush); KillTimer(hWnd, ID_TIMER); DeleteObject(hFont);//删除创建的字体 DestroyWindow(hWnd); } break; default: return DefWindowProc(hWnd, message, wParam, lParam); } return 0;}