【MFC】截图编辑插件技术总结（4）：IE下网页整页截屏

  1 POINT pnt;
  2 
  3 RECT rc;
  4 
  5 HWND DeskHwnd = ::GetDesktopWindow(); //取得桌面句柄
  6 
  7 HDC DeskDC = ::GetWindowDC(DeskHwnd); //取得桌面设备场景dc
  8 
  9 int oldRop2 = SetROP2(DeskDC, R2_NOTXORPEN);
 10 
 11 ::GetCursorPos(&pnt);//取得鼠标坐标
 12 
 13 HWND UnHwnd = ::WindowFromPoint(pnt) ; //取得鼠标指针处窗口句柄,这里获取到的是Webbrowser控件的窗口句柄
 14 
 15 m_ptWnd=UnHwnd;
 16 
 17 HDC pdc=::GetWindowDC(m_ptWnd);//获取目标窗口DC用于截图
 18 
 19 //----------------以下获取IWebBrowser2接口-------------------------
 20 
 21 CComPtr<IOleClientSite> spClientSite;
 22 
 23 HRESULT hr;
 24 
 25 long iHeight,iWidth;
 26 
 27 hr=GetSite(IID_IUnknown,(void**)&spClientSite);
 28 
 29 CComPtr<IServiceProvider> isp, isp2;
 30 
 31 IViewObject* spIViewObject;
 32 
 33 hr = spClientSite->QueryInterface(IID_IServiceProvider, (void**)(&isp));
 34 
 35 if (SUCCEEDED(hr))
 36 
 37 {
 38 
 39 hr = isp->QueryService(SID_STopLevelBrowser, IID_IServiceProvider, (void**)(&isp2));
 40 
 41 if (SUCCEEDED(hr))
 42 
 43 {
 44 
 45 CComPtr<IWebBrowser2> spBrowser;
 46 
 47 hr = isp2->QueryService(SID_SWebBrowserApp, IID_IWebBrowser2, (void**)(&spBrowser));
 48 
 49 if (SUCCEEDED(hr))
 50 
 51 {
 52 
 53 //------------------------从获取到的IWebBrowser2接口中获取IHTMLDocument2接口------------------
 54 
 55 IHTMLDocument2* pHtmlDocument2;
 56 
 57 CComPtr<IDispatch> spDisp;
 58 
 59 spBrowser->get_Document(&spDisp);
 60 
 61 spDisp->QueryInterface(IID_IHTMLDocument2,(void**)&pHtmlDocument2);//获取IHTMLDocument2接口文档
 62 
 63 IHTMLElement* pElement;
 64 
 65 pHtmlDocument2->get_body(&pElement);//获取IHTMLElement接口文档
 66 
 67 IHTMLElement2* pElement2;
 68 
 69 pElement->QueryInterface(IID_IHTMLElement2, (void**)&pElement2);//获取IHTMLElement2接口文档
 70 
 71 pElement2->get_scrollHeight(&iHeight); //获取网页实际高度
 72 
 73 pElement2->get_scrollWidth(&iWidth); //获取网页实际宽度
 74 
 75 //------------------以下准备合适大小的图片------------------------
 76 
 77 //HDC pdc2=::GetWindowDC(m_ptWnd);
 78 
 79 HDC hIEMenDC2=::CreateCompatibleDC(DeskDC);
 80 
 81 HBITMAP hIEBitmap2=::CreateCompatibleBitmap(DeskDC,iWidth,iHeight);
 82 
 83 ::SelectObject(hIEMenDC2,hIEBitmap2);
 84 
 85 //------------------以下调整Webbrowser大小以截取全页---------------
 86 
 87 long oldHeight,oldWidth;
 88 
 89 CRect oldrect;
 90 
 91 ::GetWindowRect(m_ptWnd,&oldrect);//调整前先记录下原来的大小，以便最后还原
 92 
 93 oldHeight=oldrect.Height();
 94 
 95 oldWidth=oldrect.Width();
 96 
 97 HWND m_parentWnd=::GetParent(m_ptWnd);//**************想要改变webbrowser的大小必须获取宿主窗口的句柄，改变宿主窗口的大小，这里被坑了好久，要注意！*************
 98 
 99 BOOL flag=::MoveWindow(m_parentWnd,0,0,iWidth,iHeight,TRUE);//改变宿主窗口的大小到合适的大小
100 
101 flag=::MoveWindow(m_ptWnd,0,0,iWidth,iHeight,TRUE);//改变webbrowser窗口的大小到合适的大小
102 
103 //------------------以下对网页进行截图-----------------------------
104 
105 //------------------方法一：获取IViewObject接口，调用Draw方法截图--
106 
107 IViewObject* pViewObject;
108 
109 //------------------------从获取到的IWebBrowser2接口中获取IHTMLDocument2接口------------------
110 
111 pHtmlDocument2->QueryInterface(IID_IViewObject,(void**)&pViewObject);
112 
113 pHtmlDocument2->get_body(&pElement);//获取IHTMLElement接口文档
114 
115 // pElement->QueryInterface(IID_IHTMLElementRender, (void **) &pRender);
116 
117 IHTMLBodyElement* pBodyElement;
118 
119 pElement->QueryInterface(IID_IHTMLBodyElement,(void**)&pBodyElement);
120 
121 BSTR oldscrolltype;
122 
123 pBodyElement->get_scroll(&oldscrolltype);
124 
125 pBodyElement->put_scroll(_T("no"));//去掉滚动条
126 
127 RECTL rectl;
128 
129 rectl.left=0;rectl.top=0;rectl.right=iWidth;rectl.bottom=iHeight;
130 
131 pViewObject->Draw(DVASPECT_CONTENT,1,NULL,NULL,NULL,hIEMenDC2,&rectl,NULL,NULL,NULL);
132 
133 //------------以下还原浏览器位置和滚动条，并保存图片
134 
135 pBodyElement->put_scroll(oldscrolltype);
136 
137 flag=::MoveWindow(m_ptWnd,0,0,oldWidth,oldHeight,TRUE);
138 
139 flag=::MoveWindow(m_parentWnd,0,0,oldWidth,oldHeight,TRUE);
140 
141 SaveToFile(_T(""),hIEBitmap2);
142 
143 }
144 
145 }
146 
147 }