Windows 不规则窗体

本文主要用于再WinCE当中处理不规则窗体的时候用到的。

异形窗体大家相比也是很清楚，主要就是利用Region，Windows里面有很多的API，虽然他的弊端很明显，例如，速度慢，这里主要就是为了解决这个问题，提供如下的函数接口，这里写成了DLL，给大家调用使用：

 

///Region 相关处理函数///"Author"=Rocky///DateTime:2010/04/13///Function Name :SetUpRegion///Description:根据hbmp和_transColor来生成_hrgn///HRGN & _hrgn :保存生成的结果的引用///HBITMAP _hbmp :带有关键色的位图///COLORREF _transColor:关键色，如果没有则取GetPixel(0,0)ROCKRGN_API void SetupRegion(HRGN &_hrgn, HBITMAP _hbmp, COLORREF _transColor){if(_hbmp==NULL)return ;BITMAP bitmap;GetObject(_hbmp,sizeof(bitmap),&bitmap);//获取位图的高和宽int nWidth=bitmap.bmWidth;int nHeight=bitmap.bmHeight;HDC hmemDC= ::CreateCompatibleDC(NULL);//创建与传入DC兼容的临时 HBITMAP hOldBmp = (HBITMAP)::SelectObject(hmemDC,_hbmp); //创建总的窗体区域，初始region为0if(_hrgn==NULL)_hrgn =::CreateRectRgn(0,0,0,0); if(_transColor==NULL)_transColor=GetPixel(hmemDC,0,0); int y; for(y=0;y<nHeight ;y++) { HRGN rgnTemp; //保存临时region int iX = 0; do { //跳过透明色找到下一个非透明色的点. while (iX < nWidth && ::GetPixel(hmemDC,iX, y) == _transColor) iX++; //记住这个起始点 int iLeftX = iX; //寻找下个透明色的点 while (iX < nWidth && ::GetPixel(hmemDC,iX, y) != _transColor) ++iX; //创建一个包含起点与重点间高为1像素的临时“region” rgnTemp=::CreateRectRgn(iLeftX, y, iX, y+1); //合并到主"region". CombineRgn( _hrgn,_hrgn,rgnTemp, RGN_OR); //删除临时"region",否则下次创建时和出错 ::DeleteObject(rgnTemp); }while(iX <nWidth ); iX = 0; } ::SelectObject(hmemDC,hOldBmp); ::DeleteDC(hmemDC); //return hrgn;}///FunctionName:SaveRGN///Description:保存HRGN到指定的文件///HRGN hRgn:需要保存的区域///pFilePath:保存文件的路径ROCKRGN_API void SaveRGN(HRGN hRgn,TCHAR *pFilePath){//获取hRgn的大小DWORD size=0;size = GetRegionData(hRgn,size,NULL);BYTE *pRegionData=new BYTE[size];if(0==GetRegionData(hRgn,size,(LPRGNDATA)pRegionData)){return;}HANDLE hFile = CreateFile(pFilePath,GENERIC_WRITE|GENERIC_READ,FILE_SHARE_READ,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);if(hFile==NULL){return;}DWORD dwWrited=0;if(0==WriteFile(hFile,pRegionData,size,&dwWrited,NULL)){return;}CloseHandle(hFile);hFile=NULL;//删除delete pRegionData;pRegionData=NULL;}///FunctionName: ReadRGN///读取RGN文件到内存当中///HRGN &_hRgn:读取的文件存放的地方///pFilePath:读取的文件内容///ROCKRGN_API void ReadRGN(HRGN &_hRgn, TCHAR *pFilePath){HANDLE hFile = CreateFile(pFilePath,GENERIC_WRITE|GENERIC_READ,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);if(hFile==NULL){return ;}DWORD size=GetFileSize(hFile,NULL);if(size==0xFFFFFFFF){return ;}BYTE *pRegionData= new BYTE[size];DWORD dwNumberWrite=0;ReadFile(hFile,pRegionData,size,&dwNumberWrite,NULL);_hRgn = ExtCreateRegion(NULL,size,(RGNDATA*)pRegionData);CloseHandle(hFile);hFile=NULL;delete pRegionData;pRegionData=NULL;}ROCKRGN_API void RockSetWindowRgn(HWND hWnd,HRGN hrgn,BOOL bRedraw){SetWindowRgn(hWnd,hrgn,bRedraw);}