MFC CWnd仿按钮
CBtn::CBtn(){RegisterWndClass();}bool CBtn::RegisterWndClass(void){WNDCLASS n;HINSTANCE hInst=AfxGetInstanceHandle();if(GetClassInfo(hInst,"MyBtn",&n)==0)return true;//已经存在n.style=CS_DBLCLKS;n.cbClsExtra=0;n.cbWndExtra=0;n.hIcon=NULL;n.hCursor=AfxGetApp()->LoadStandardCursor(IDC_ARROW);n.hInstance=hInst;n.lpszClassName="MyBtn";n.lpszMenuName=NULL;n.lpfnWndProc=::DefWindowProcA;if(AfxRegisterClass(&n)){AfxThrowResourceException();return false;}return true;}void CBtn::OnPaint(){CPaintDC dc(this); // device context for painting// TODO: 在此处添加消息处理程序代码// 不为绘图消息调用 CWnd::OnPaint()DrawBtn(IDR_JPG1,"JPG");}void CBtn::OnLButtonDown(UINT nFlags, CPoint point){// TODO: 在此添加消息处理程序代码和/或调用默认值DrawBtn(IDB_PNG1,"PNG");CWnd::OnLButtonDown(nFlags, point);}void CBtn::OnLButtonUp(UINT nFlags, CPoint point){// TODO: 在此添加消息处理程序代码和/或调用默认值DrawBtn(IDR_JPG1,"JPG");int id=22222;////给父窗口发送项被单击消息GetParent()->SendMessage(WM_COMMAND,MAKEWPARAM(id,0),LPARAM(this->GetSafeHwnd()));CWnd::OnLButtonUp(nFlags, point);}BOOL CBtn::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message){// TODO: 在此添加消息处理程序代码和/或调用默认值SetCursor(AfxGetApp()->LoadCursorA(IDC_CURSOR1));return true;//CWnd::OnSetCursor(pWnd, nHitTest, message);}#include<atlimage.h>bool CBtn::DrawBtn(int id, CString file){CImage img;HRSRC src=::FindResourceA(::AfxGetResourceHandle(),MAKEINTRESOURCE(id),file);if(src==NULL)return false;HGLOBAL data=::LoadResource(::AfxGetResourceHandle(),src);// 加载资源if(data==NULL){::FreeResource(data);return false;}LPVOID lp=::LockResource(data);// 锁定内存中的指定资源LPSTREAM is;DWORD size=::SizeofResource(::AfxGetResourceHandle(),src);HGLOBAL hg=::GlobalAlloc(GHND,size);LPBYTE by=(LPBYTE)::GlobalLock(hg);::memcpy(by,lp,size);::GlobalUnlock(hg);// 解除内存中的指定资源HRESULT res=::CreateStreamOnHGlobal(hg,true,&is);// 从指定内存创建流对象if(res!=S_OK)::GlobalFree(hg);else {img.Load(is);::GlobalFree(hg);}::FreeResource(data);// 释放资源COLORREF ref=RGB(0,0,0);if(img.GetBPP()==32)//确认该图像包含Alpha通道{for(int i=0;i<img.GetWidth();i++)for(int j=0;j<img.GetHeight();j++){LPBYTE by=(LPBYTE)img.GetPixelAddress(i,j);by[0]=by[0]*by[3]/255;by[1]=by[1]*by[3]/255;by[2]=by[2]*by[3]/255;}ref=img.GetPixel(0,0);} CClientDC dc(this); dc.SetStretchBltMode(3);//4 ::SetBrushOrgEx(dc,0,0,NULL); CRect rc;GetClientRect(&rc); img.SetTransparentColor(ref); img.Draw(dc.m_hDC,0,0,rc.Width(),rc.Height()); CString s="按钮"; CFont *font=dc.SelectObject(CFont::FromHandle((HFONT)GetStockObject(DEFAULT_GUI_FONT))); dc.SetTextColor(RGB(255,0,0)); dc.SetBkMode(TRANSPARENT); dc.DrawText(s,s.GetLength(),rc,DT_SINGLELINE|DT_VCENTER|DT_CENTER); return true;}void CMyBtnDlg::OnBnClickedButton1(){b.Create(NULL,NULL,WS_VISIBLE|WS_CHILD,CRect(0,0,100,100),this,NULL,NULL);}#include<atlimage.h>void CMyBtnDlg::OnMyBtn(void){//AfxMessageBox("我的按钮事件");CWnd *pwnd=CWnd::GetDesktopWindow();//屏幕CWindowDC dc(pwnd);CRect rc;pwnd->GetWindowRect(&rc);int pix=dc.GetDeviceCaps(BITSPIXEL)*dc.GetDeviceCaps(PLANES);CImage img;img.Create(rc.Width(),rc.Height(),pix);CImageDC mdc(img);::BitBlt(mdc,0,0,rc.Width(),rc.Height(),dc,0,0,SRCCOPY);img.Save("C:\\j.jpg");}