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<title>8.4访问当前活动视图和活动文档 </title>
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</center></div><font FACE="Times New Roman" SIZE="4"><b><p ALIGN="CENTER"></b></font><font color="#3973DE" FACE="Times New Roman" SIZE="4">8.4</font><font color="#3973DE" SIZE="4">访问当前活动视图和活动文档
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<p></font><font SIZE="3">对于</font><font FACE="Times New Roman" SIZE="3">SDI</font><font SIZE="3">程序，主框架窗口就是文档框窗，可以采用以下方法取得当前文档和视图：</font><font FACE="Times New Roman" SIZE="3"></p>
<p></font><font SIZE="3">取得活动文档：</font><font FACE="Times New Roman" SIZE="3"></p>
<p>CMyDocument* pDoc;</p>
<p>pDoc=(CMyDocument*)((CFrameWnd*)AfxGetApp()->m_pMainWnd)</p>
<p>->GetActiveDocument();</p>
<p></font><font SIZE="3">或</font><font FACE="Times New Roman" SIZE="3"></p>
<p>pDoc=(CMyDocument*)((CFrameWnd*)AfxGetMainWnd())</font><font SIZE="3">；</font><font FACE="Times New Roman" SIZE="3"></p>
<p></font><font SIZE="3">这两者是等效的。</font><font FACE="Times New Roman" SIZE="3"></p>
<p></font><font SIZE="3">取得活动视图：</font><font FACE="Times New Roman" SIZE="3"></p>
<p>CMyView* pView;</p>
<p>pView=(CMyView*)((CFrameWnd*)AfxGetApp()->m_pMainWnd)->GetActiveView();</p>
<p></font><font SIZE="3">对于</font><font FACE="Times New Roman" SIZE="3">MDI</font><font SIZE="3">程序，由于子窗口才是文档框窗，因此首先要用</font><font FACE="Times New Roman" SIZE="3">GetActiveFrame()</font><font SIZE="3">取得活动子框架窗口，然后通过该子窗口获取活动文档和视图：</font><font FACE="Times New Roman" SIZE="3"></p>
<p>CMDIChildWnd*
pChild=(CMDIChildWnd*)((CFrameWnd*)AfxGetApp()->m_pMainWnd)->GetActiveFrame();</p>
<p></font><font SIZE="3">取得活动文档：</font><font FACE="Times New Roman" SIZE="3"></p>
<p>CMyDocument* pDoc=pChild->GetActiveDocument();</p>
<p>CMyView* pView=(CMyView*)pChild->GetActiveView();</p>
<p></font><font SIZE="3">可以把上述函数片段做成静态成员函数，比如：</font><font FACE="Times New Roman" SIZE="3"></p>
<p>static CMyDocument::GetCurrentDoc()</p>
<p>{</p>
<p>CMDIChildWnd* pChild=(CMDIChildWnd*)((CFrameWnd*)AfxGetApp()-
>m_pMainWnd)->GetActiveFrame();</p>
<p>CMyDocument* pDoc=pChild->GetActiveDocument();</p>
<p>}</p>
<p></font><font SIZE="3">这样就可以通过以下方式取得活动文档（或视图）：</font><font FACE="Times New Roman" SIZE="3"></p>
<p>CMyDocument::GetCurrentDoc();</font><font SIZE="3"><b></p>
<p></b><font color="#3973DE">注：静态成员函数调用时不需要一个具体的对象与之相关联。</font></font><font FACE="Times New Roman" SIZE="4"></p>
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<p align="center"></font><font size="2" color="#000000">本教程由<a href="http://vcdynasty.yeah.net">Visual C++王朝（Where programmers come together）</a>协助制作<br>
未经许可，请勿以任何形式复制</font></td>
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