subject_62960.htm

vc

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序号：62960 发表者：编编编 发表日期：2003-11-30 12:56:30
<br>主题：CFORMVIEW类???
<br>内容：我想设计一个多文档的程序，在APPWIZARD的第6部我使用基类为CFORMVIEW类。也就是我希望我的所有视图都是对话框样式的，问题是生成的程序只有一个FORM，如果我希望在菜单中能分别调用不同的的FORM，这样的程序我应该如何设计。 
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回复者：浪际天涯 回复日期：2003-11-30 15:04:07
<br>内容：在资源里再创建一个对话框，new一个基于 CFormView的类，把对话框绑定到这个类上。
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<font color=red>答案被接受</font><br>回复者：红苹果 回复日期：2003-11-30 21:44:50
<br>内容：下面的函数可以在SDI程序中切换视：<BR>CView * CMainFrame::SwitchToForm( int nCmdID )<BR>{<BR>&nbsp;&nbsp;CView* pOldActiveView = GetActiveView();<BR>&nbsp;&nbsp;if (nCmdID == m_nCurrentView)<BR>&nbsp;&nbsp;&nbsp;&nbsp;return pOldActiveView;&nbsp;&nbsp;// already selected<BR><BR>&nbsp;&nbsp;::SetWindowLong(pOldActiveView-&gt;m_hWnd, GWL_ID, m_nCurrentView);<BR><BR>&nbsp;&nbsp;CRuntimeClass* pNewViewClass;<BR>&nbsp;&nbsp;switch (nCmdID)<BR>&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;case IDW_IMAGE_VIEW: // 自己定义的常量，代表我自己的三个视类<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pNewViewClass = RUNTIME_CLASS(CMIRImageView);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;<BR>&nbsp;&nbsp;&nbsp;&nbsp;case IDW_ENHANCE_VIEW:<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pNewViewClass = RUNTIME_CLASS(EnhanceView);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;<BR>&nbsp;&nbsp;&nbsp;&nbsp;case IDW_MEASURE_VIEW:<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pNewViewClass = RUNTIME_CLASS(CMeasureView);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;<BR>&nbsp;&nbsp;&nbsp;&nbsp;default:<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ASSERT(0);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return pOldActiveView;<BR>&nbsp;&nbsp;}<BR><BR>&nbsp;&nbsp;// create the new view<BR>&nbsp;&nbsp;CCreateContext context;<BR>&nbsp;&nbsp;context.m_pNewViewClass = pNewViewClass;<BR>&nbsp;&nbsp;context.m_pCurrentDoc = GetActiveDocument();<BR>&nbsp;&nbsp;CView* pNewView = STATIC_DOWNCAST(CView, CreateView(&amp;context));<BR>&nbsp;&nbsp;if (pNewView != NULL)<BR>&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp; // the new view is there, but invisible and not active...<BR>&nbsp;&nbsp;&nbsp;&nbsp; pNewView-&gt;OnInitialUpdate();<BR>&nbsp;&nbsp;&nbsp;&nbsp; pNewView-&gt;ShowWindow(SW_SHOW);<BR>&nbsp;&nbsp;&nbsp;&nbsp; SetActiveView(pNewView);<BR>&nbsp;&nbsp;&nbsp;&nbsp; RecalcLayout();<BR>&nbsp;&nbsp;&nbsp;&nbsp; m_nCurrentView = nCmdID;<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp; // finally destroy the old view...<BR>&nbsp;&nbsp;&nbsp;&nbsp; pOldActiveView-&gt;DestroyWindow();<BR>&nbsp;&nbsp;&nbsp;&nbsp; return pNewView;&nbsp;&nbsp;// already selected<BR>&nbsp;&nbsp; }<BR>&nbsp;&nbsp; return pOldActiveView;&nbsp;&nbsp;// already selected<BR>}<BR>如有疑问，可以参看MSDN中的MFC例子程序enroll的step4.<BR>2003-11-30 21:51:34