Windows 剪切板的应用，复制浏览器or本地目录图片

#include "clipboardtest.h" #include "windows.h" #include <QKeyEvent> // #include "gdiplusheaders.h" // #include "gdiplustypes.h" // CString 与 QString 相互转换; inline QString CS2QS(CString cs) { return QString::fromWCharArray((LPCTSTR)cs, cs.GetLength()); } inline CString QS2CS(QString qs) { return qs.toStdString().c_str(); } ClipboardTest::ClipboardTest(QWidget *parent) : QWidget(parent) { ui.setupUi(this); } ClipboardTest::~ClipboardTest() { } void ClipboardTest::keyPressEvent(QKeyEvent *event) { if (event->modifiers() == Qt::ControlModifier && event->key() == Qt::Key_V) { sendCopyImage(); } return __super::keyPressEvent(event); } void ClipboardTest::sendCopyImage() { bool bHasImage = false; CString strFileName; //判断剪贴板的数据格式是否可以处理。; if (IsClipboardFormatAvailable(CF_HDROP)) { // 从我的电脑中复制图片; // 打开剪切板; if (OpenClipboard((HWND)this->winId())) { // 得到剪贴板中的数据; HDROP hDrop = HDROP(GetClipboardData(CF_HDROP)); //关闭剪贴板; CloseClipboard(); if (hDrop) { // 获取当前剪切板文件的个数; UINT cFileCount = DragQueryFile(hDrop, (UINT)-1, NULL, 0); // 只复制一张图片时进行发送; if (cFileCount == 1) { bHasImage = true; TCHAR szFile[MAX_PATH]; // 获取剪切板文件名; DragQueryFile(hDrop, 0, szFile, sizeof(szFile)); strFileName = szFile; } } } } // 从浏览器中复制图片; else if (IsClipboardFormatAvailable(CF_BITMAP)) { if (OpenClipboard((HWND)this->winId())) { HBITMAP hBitMap = (HBITMAP)GetClipboardData(CF_BITMAP); //关闭剪贴板; CloseClipboard(); if (hBitMap) { bHasImage = true; strFileName = ".//MyImage.bmp"; SaveBitmapToFile(hBitMap, strFileName); } else { int errorType = GetLastError(); } } } // 如果有图片则显示图片; if (bHasImage) { QPixmap pixmap(CS2QS(strFileName)); this->setFixedSize(pixmap.size()); ui.label->setPixmap(pixmap); } } // 将图片保存为bmp文件; bool ClipboardTest::SaveBitmapToFile(HBITMAP hBitmap, CString imageFileName) { HDC hDC; //当前分辨率下每象素所占字节数; int iBits; //位图中每象素所占字节数; WORD wBitCount; //定义调色板大小， 位图中像素字节大小 ，位图文件大小 ， 写入文件字节数; DWORD dwPaletteSize=0, dwBmBitsSize=0, dwDIBSize=0, dwWritten=0; //位图属性结构; BITMAP Bitmap; //位图文件头结构; BITMAPFILEHEADER bmfHdr; //位图信息头结构; BITMAPINFOHEADER bi; //指向位图信息头结构; LPBITMAPINFOHEADER lpbi; //定义文件，分配内存句柄，调色板句柄; HANDLE fh, hDib, hPal,hOldPal=NULL; //计算位图文件每个像素所占字节数; hDC = CreateDC(CString("DISPLAY"), NULL, NULL, NULL); iBits = GetDeviceCaps(hDC, BITSPIXEL) * GetDeviceCaps(hDC, PLANES); DeleteDC(hDC); if(iBits <= 1) wBitCount = 1; else if(iBits <= 4) wBitCount = 4; else if(iBits <= 8) wBitCount = 8; else wBitCount = 24; GetObject(hBitmap, sizeof(Bitmap), (LPSTR)&Bitmap); bi.biSize= sizeof(BITMAPINFOHEADER); bi.biWidth = Bitmap.bmWidth; bi.biHeight = Bitmap.bmHeight; bi.biPlanes = 1; bi.biBitCount = wBitCount; bi.biCompression= BI_RGB; bi.biSizeImage=0; bi.biXPelsPerMeter = 0; bi.biYPelsPerMeter = 0; bi.biClrImportant = 0; bi.biClrUsed = 0; dwBmBitsSize = ((Bitmap.bmWidth *wBitCount+31) / 32)*4* Bitmap.bmHeight; //为位图内容分配内存; hDib = GlobalAlloc(GHND,dwBmBitsSize+dwPaletteSize+sizeof(BITMAPINFOHEADER)); lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib); *lpbi = bi; //处理调色板; hPal = GetStockObject(DEFAULT_PALETTE); if (hPal) { hDC = ::GetDC(NULL); hOldPal = ::SelectPalette(hDC,(HPALETTE)hPal, FALSE); RealizePalette(hDC); } //获取该调色板下新的像素值; GetDIBits(hDC,hBitmap, 0,(UINT)Bitmap.bmHeight, (LPSTR)lpbi+ sizeof(BITMAPINFOHEADER)+dwPaletteSize, (BITMAPINFO *)lpbi, DIB_RGB_COLORS); //恢复调色板; if (hOldPal) { ::SelectPalette(hDC, (HPALETTE)hOldPal, TRUE); RealizePalette(hDC); ::ReleaseDC(NULL, hDC); } //创建位图文件; fh = CreateFile(imageFileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL); if (fh == INVALID_HANDLE_VALUE) return FALSE; //设置位图文件头; bmfHdr.bfType = 0x4D42; // "BM" dwDIBSize = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+dwPaletteSize+dwBmBitsSize; bmfHdr.bfSize = dwDIBSize; bmfHdr.bfReserved1 = 0; bmfHdr.bfReserved2 = 0; bmfHdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER)+(DWORD)sizeof(BITMAPINFOHEADER)+dwPaletteSize; //写入位图文件头; WriteFile(fh, (LPSTR)&bmfHdr, sizeof(BITMAPFILEHEADER), &dwWritten, NULL); //写入位图文件其余内容; WriteFile(fh, (LPSTR)lpbi, dwDIBSize, &dwWritten, NULL); //清除; GlobalUnlock(hDib); GlobalFree(hDib); CloseHandle(fh); return TRUE; }