win32看图程序.doc

#pragma warning(disable : 4786)#include #define ULONG_PTR void*#include /*用于显示BMP、JPG文件的库*/#include #include const int KEY_VALUE_B = 66;/*B键值*/const int KEY_VALUE_S = 83;/*S键值*/const int RANGE_MAX = 100;/*滚动条范围*/using namespace Gdiplus;/ Global Variables:static int iAllBmpJpg = 0;/*当前目录下所有BMP、JPG文件数*/static int iCurBmpJpg = 0;/*当前文件数*/static double fMultiple = 1.0;/*默认放大倍数为1*/static const double fEnlarge = 1.2;/*每次放大 20% */ Foward declarations of functions included in this code module:LRESULT CALLBACKWndProc(HWND, UINT, WPARAM, LPARAM);int GetBmpJpg(std:vector& oBJPicture);wchar_t* ChrToWChr(const char* buffer);/*功能说明：主函数，应用程序的入口点，初始化应用程序，显示主窗口，进入一个消息接收一发送循环输如参数说明：输出参数说明：返回值说明：备注：*/int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR szCmdLine, int iCmdShow)static TCHAR szAppName = TEXT (Bricks1) ;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 (WHITE_BRUSH) ;wndclass.lpszMenuName = NULL ;wndclass.lpszClassName = szAppName ;if (!RegisterClass (&wndclass) MessageBox (NULL, TEXT (This program requires Windows NT!),szAppName, MB_ICONERROR) ; return 0 ; hwnd = CreateWindow ( szAppName, TEXT (LoadBitmap Demo), WS_OVERLAPPEDWINDOW|WS_HSCROLL|WS_VSCROLL, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);iCmdShow = SW_SHOWMAXIMIZED;/*默认最大化窗口*/ShowWindow (hwnd, iCmdShow);UpdateWindow (hwnd) ;while (GetMessage (&msg, NULL, 0, 0) TranslateMessage (&msg) ; DispatchMessage (&msg) ; return msg.wParam ;/*功能说明：Processes messages for the main windowWM_PAINT- Paint the main windowWM_DESTROY- post a quit message and return输如参数说明：输出参数说明：返回值说明：备注：*/LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)PAINTSTRUCT ps;HDC hdc;int iXSource = 0;/*加载的图片宽*/int iYSource = 0;/*加载的图片高*/char szCur50 = 0;/*存储整型iCurBmpJpg转换成的字符串*/char szAll50 = 0;/*存储整型iAllBmpJpg转换成的字符串*/std:string oShow;/*显示图片信息*/std:vector oPicture;/*存放当前目录下BMP、JPG图片文件名*/SCROLLINFO si;static int iVertPos = 0;/*垂直滚动条的位置*/static int iHorzPos = 0;/*水平滚动条的位置*/switch (message) case WM_SIZE:/*当然该窗口第一次显示时，将接收到该消息*/si.cbSize = sizeof(SCROLLINFO);si.fMask = SIF_RANGE|SIF_POS;si.nPos = 0;si.nMin = 0;si.nMax = RANGE_MAX;SetScrollInfo(hWnd, SB_VERT, &si, TRUE);/*设置垂直滚动条的滚动范围和初始位置*/SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);/*设置水平滚动条的滚动范围和初始位置*/break;case WM_VSCROLL:/*垂直滚动条的消息*/si.cbSize = sizeof(SCROLLINFO);si.fMask = SIF_ALL;GetScrollInfo(hWnd, SB_VERT, &si);iVertPos = si.nPos;switch(LOWORD(wParam)case SB_TOP:si.nPos = si.nMin;break;case SB_BOTTOM:si.nPos = si.nMax;break;case SB_LINEUP:si.nPos -= 1;break;case SB_LINEDOWN:si.nPos += 1;break;case SB_THUMBTRACK:si.nPos = si.nTrackPos;break;default:break;si.fMask = SIF_POS;SetScrollInfo(hWnd, SB_VERT, &si, TRUE);/*设置垂直滚动条新的位置*/GetScrollInfo(hWnd, SB_VERT, &si);if (si.nPos != iVertPos)/*位置发生改变时重画*/iVertPos = si.nPos;InvalidateRect(hWnd, NULL, FALSE);break;case WM_HSCROLL:/*水平滚动条的消息*/si.cbSize = sizeof(SCROLLINFO);si.fMask = SIF_ALL;GetScrollInfo(hWnd, SB_HORZ, &si);iHorzPos = si.nPos;switch(LOWORD(wParam)case SB_LEFT:si.nPos = si.nMin;break;case SB_RIGHT:si.nPos = si.nMax;break;case SB_LINELEFT:si.nPos -= 1;break;case SB_LINERIGHT:si.nPos += 1;break;case SB_THUMBTRACK:si.nPos = si.nTrackPos;default:break;si.fMask = SIF_POS;SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);/*设置水平滚动条新的位置*/GetScrollInfo(hWnd, SB_HORZ, &si);if (iHorzPos != si.nPos)/*位置发生改变时重画*/iHorzPos = si.nPos;InvalidateRect(hWnd, NULL, FALSE);break;case WM_PAINT:hdc = BeginPaint(hWnd, &ps);RECT rect;GetClientRect(hWnd, &rect);#if 0/*本程序用的是GDI+双缓冲*/*GDI 双缓冲*/hdcMem = CreateCompatibleDC(hdc);hMemBitMap = CreateCompatibleBitmap(hdcMem,rect.right-rect.left,rect.bottom-rect.top);SelectObject(hdcMem, hMemBitMap);/*填充内存背景位图为白色*/hBrush = CreateSolidBrush(RGB(0xff,0xff,0x00);FillRect(hdcMem, &rect, hBrush);/SetBkColor(hdcMem, RGB(0xff, 0x00, 0xff);#endif/*得到当前目录下所有BMP、JPG文件*/iAllBmpJpg = GetBmpJpg(oPicture);if (iAllBmpJpg = 0)MessageBox(NULL, there are not bmp jpg picture!, NULL, MB_OK);exit(0);/*使oShow包含这些显示信息：iCurBmpJpg、iBmpJpg、当前文件名*/itoa(iCurBmpJpg + 1, szCur, 10);itoa(iAllBmpJpg, szAll, 10);oShow += szCur;oShow += /;oShow += szAll;oShow += n;oShow += oPictureiCurBmpJpg;/*把当前图片文件名char型转换成WCHAR型*/wchar_t *pwFileName = NULL;pwFileName = ChrToWChr(oPictureiCurBmpJpg.c_str();if (NULL = pwFileName)MessageBox(NULL, pwFileName is NULL!, NULL, MB_OK);exit(0);/*加载图片*/Gdiplus:GdiplusStartupInput gdiplusStartupInput;ULONG_PTR gdiplusToken;Gdiplus:GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);Gdiplus:Image *pImage = Gdiplus:Image:FromFile(pwFileName);iXSource = pImage-GetWidth();iYSource = pImage-GetHeight();/*图片未超过窗口时隐藏滚动条*/if (iXSource * fMultiple rect.right - rect.left)/*图片水平方向未超过窗口时，隐藏水平滚动条*/si.cbSize = sizeof(SCROLLINFO);si.fMask = SIF_PAGE;si.nPage = si.nMax;/*页面大小大于等于滚动条范围，Windows通常隐藏滚动条*/SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);else/*图片水平方向超过窗口时，显示水平滚动条*/si.cbSize = sizeof(SCROLLINFO);si.fMask = SIF_PAGE;si.nPage = 0;/*页面大小小于滚动条范围，显示滚动条*/SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);if (iYSource * fMultiple rect.right - rect.left) ? rect.left : (rect.right - rect.left - iXSource * fMultiple)/2),long(iYSource * fMultiple rect.bottom - rect.top) ? rect.top : (rect.bottom - rect.top - iYSource * fMultiple)/2),long(iXSource * fMultiple rect.right - rect.left) ? rect.right - rect.left : iXSource * fMultiple),long(iYSource * fMultiple rect.bottom - rect.top) ? rect.bottom - rect.top : iYSource * fMultiple);graphicsMemBitmap.DrawImage(pImage,/int(rect.right - rect.left - iXSource * fMultiple) 0 ? (rect.right - rect.left - iXSource * fMultiple)/2 : 0), /int(rect.bottom - rect.top - iYSource * fMultiple) 0 ? (rect.bottom - rect.top - iYSource * fMultiple)/2 : 0), rectMap,int(iXSource * fMultiple rect.right - rect.left) ? (float(iHorzPos)/RANGE_MAX * (iXSource * fMultiple - (rect.right - rect.left) / fMultiple : 0),int(iYSource * fMultiple rect.bottom - rect.top) ? (float(iVertPos)/RANGE_MAX * (iYSource * fMultiple - (rect.bottom - rect.top) / fMultiple : 0),int(iXSource * fMultiple rect.right - rect.left) ? (rect.right - rect.left) / fMultiple : iXSource), int(iYSource * fMultiple rect.bottom - rect.top) ? (rect.bottom - rect.top) / fMultiple : iYSource),UnitPixel);/*通过多画一块内存位图实现滚动，效率不如上一种高*/*Bitmap *pTmpBitmap = new Bitmap(iXSource * fMultiple, iYSource * fMultiple);if (NULL = pTmpBitmap)exit(1);Graphics graphicsTmpBitmap(pTmpBitmap);graphicsTmpBitmap.Clear(Color.White);graphicsTmpBitmap.DrawImage(pImage,int(0), int(0), int(iXSource * fMultiple), int(iYSource * fMultiple);graphicsMemBitmap.DrawImage(pTmpBitmap,int(iXSource * fMultiple rect.right - rect.left) ? 0 : (rect.right - rect.left - iXSource * fMultiple)/2), int(iYSource * fMultiple rect.bottom - rect.top) ? 0 : (rect.bottom - rect.top - iYSource * fMultiple)/2), int(iXSource * fMultiple rect.right - rect.left) ? double(iHorzPos)/RANGE_MAX * (iXSource * fMultiple - (rect.right - rect.left) : 0),int(iYSource * fMultiple rect.bottom - rect.top)? double(iVertPos)/RANGE_MAX * (iYSource * fMultiple - (rect.bottom - rect.top) : 0),int(iXSource * fMultiple rect.right - rect.left) ? (rect.right - rect.left) : (iXSource * fMultiple), int(iYSource * fMultiple rect.bottom - rect.top) ? (rect.bottom - rect.top) : (iYSource * fMultiple),UnitPixel);*/*在内存位图上画当前文件数、总文件数和文件名*/SolidBrush solidBrush(Color(255, 0, 0, 0);FontFamily fontFamily(L宋体);Font font(&fontFamily, 12, FontStyleRegular, UnitPoint);PointF pointF(rect.right - rect.left)/2, 0);wchar_t *pwShow = NULL;pwShow = ChrToWChr(oShow.c_str();graphicsMemBitmap.DrawString(pwShow, MultiByteToWideChar(CP_ACP, 0, oShow.c_str(), -1, NULL, 0), &font, pointF, &solidBrush);/*将内存位图画到设备DC*/Graphics graphics(hdc);graphics.DrawImage(pMemBitmap, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);/*if (NULL != pTmpBitmap)delete pTmpBitmap;pTmpBitmap = NULL;*/if (NULL != pwFileName)delete pwFileName;pwFileName = NULL;if (NULL != pwShow)delete pwShow;pwShow = NULL;/delete &font;delete &solidBrush;if (NULL != pImage)delete pImage;pImage = NULL;if (NULL != pMemBitmap)delete pMemBitmap;pMemBitmap = NULL;/Gdiplus:GdiplusShutdown(gdiplusToken);EndPaint(hWnd, &ps);break;case WM_LBUTTONDOWN:/*左键消息，下一张*/if (iCurBmpJpg 0)iCurBmpJpg-;else if (iCurBmpJpg = 0)/*第一张，循环，跳到最后一张*/iCurBmpJpg = iAllBmpJpg - 1;InvalidateRect(hWnd, NULL, FALSE);break;case WM_KEYDOWN:/*键盘消息*/if (wParam = KEY_VALUE_B)/*B键*/if (fMultiple 0.1)/*最多缩小十倍*/fMultiple /= fEnlarge;InvalidateRect(hWnd, NULL, FALSE);break;case WM_DESTROY:PostQuitMessage(0);break;case WM_ERASEBKGND:break;default:return DefWindowProc(hWnd, message, wParam, lParam); return 0;/*功能说明：得到当前目录下所有的BMP、JPG文件名输入参数说明：输出参数说明：oBJPicture：存储BMP、JPG文件名返回值说明：所有的BMP、JPG文件个数备注：*/int GetBmpJpg(std:vector& oBJPicture)int iRet = 0;HANDLEhFile;WIN32_FIND_DATA oFindDate;#if 1/*寻找.jpg文件*/hFile = FindFirstFile(*.jpg, &oFindDate);if (hFile = INVALID_HANDLE_VALUE)/MessageBox(NULL, FindFirstFile() failed!, NULL, MB_OK);/return 0;iRet = 0;elseiRet = 1;while (iR