mfc如何在文檔(cxxx)類或框架(cmainframe)類中獲得視類(cmyview（How does MFC get a visual class in the ument (cxxx) class or CMainFrame class (cmyview)）

1、mfc如何在文檔(cxxxdoc)類或框架(cmainframe)類中獲得視類(cmyviewHow does MFC get a visual class in the document (cxxxdoc) class or CMainFrame class (cmyview)How does MFC get a visual class in the document (CXXXDoc) class or CMainFrame class (CMyView.txt)How does MFC get the view class (CMyView) pointer in the docume

2、nt (CXXXDoc) class or the framework (CMainFrame) class?In the document class, just use the (multi document, single document, a little simpler)POSITION (pos=this->GetFirstViewPosition); / / to write in the document class, to replace this document pointer can be in other classesWhile (POS)CView *pV

3、iew=this->GetNextView (POS);In the framework class, just select the document object, and then use the code aboveHere's an aspect of getting another object from an object (excerpt from MFC)The method of obtaining another object from an objectThe member functions used by the object to be obtain

4、ed by this objectCDocument object view list GetFirstViewPosition, GetNextViewDocument template GetDocTemplateCView object document object GetDocumentBorder window GetParentFrameCMDIChildWnd orCFrameWnd object activity view GetActiveViewActive visual document GetActiveDocumentCMDIFrameWnd object, act

5、ive document, border window, MDIGetActiveUse GetActiveView () in the framework class;In the document class (CMainFrame*) (AfxGetApp () ->m_pMainWnd) ->GetActiveView ();How does MFC get the pointer to the View class under CMainFrame?Using the GetActiveView () functionHow do ordinary classes in

6、MFC get pointers to the view class?How do I get pointers to the view class in the class (Generic)? I've tried that:CMainFrame *p= (CMainFrame*) AfxGetMainWnd ();CView, *pv=p->GetActiveView ();According to your usage, that's all right!Is this the View that hasn't been created yet, so P

7、V is empty?.CMainFrame *m_pfm = (CMainFrame*) AfxGetApp () ->m_pMainWnd;. *m_pView = (*) m_pfm->GetActiveView ();One less word: AfxGetApp ()CMainFrame *p= (CMainFrame*) AfxGetApp () ->m_pMainWnd;CView *pv = (CView*) p->GetActiveView ();Upstairs in charge of building analysis, a sequence

8、of function calls, not what is PreCreateWindow or CXXXApp, the constructor of the CXXXFrame InitInstance, the main window template did not finish for the manipulation of the CView.AsdfasdfHow do I return a pointer to a class in MFC, such as CWIN, view, and so on!In the CView class, call this->Get

9、Document () to get doc.In the CDocument class, call GetFirstViewPosition () and GetNextView () to get all the view.In other classes, one method is to pass the pointer in for the call to use.Also, you get CWinApp with AfxGetApp (), then GetFirstDocTemplatePosition () and GetNextDocTemplate () to get

10、the doc template, and then call GetFirstDocPosition () and GetNextDoc () to get the doc.How do I get the pointer of the View class (this) or the pointer of the whole dialog box in the OnDraw function or the *Dlg function?In a single document, you can use the following methods:The file where you want

11、 to get the pointer now contains two files at the start:View of the main frame class header file, that is, #include "MainFrm.h""View class header file, that is, #include "XXView.h""Then add the following statement at the point where you want to access the m_pSetCMainFra

12、me* frm= (CMainFrame*) AfxGetApp () ->m_pMainWnd;CXXView* pView= (CXXView*) frm->GetActiveView ();PView, that is, the View class pointerBut isn't it easier for you to use this?In the single document of MFC, the view window handle produced by Ctestview is obtained from the treeview class of

13、 a viewGets the window handle of the view in the single document framework. Ask for a piece of code. Check online, did not get it out. Which brother has time to write a paragraph?.You're not clear. There are many ways to carry it out.You can get the view pointer through the global object theApp,

14、 and thenView pointer ->GetSafeHwnd (); gets the handle.You can also send custom messages to send the handle to the specified window class.You can also define a Cview pointer in your stdafx.h, which points to the View class during the initialization process, and is used in your treeview.You can a

15、lso receive a handle for the treeview class definition method by itself, when called.Note that you can handle the creation sequence, or else you will make an assertion error under debug.The method is really a lot.If you do not use the document / view structure, the single document is created in the

16、build frame window. There is a variable called m_wndView. This is the handle. He's a CWnd derivative.If you use the document / view structure, direct GetActiveView is fine.There is one more case, if you use the split window.Which function has been forgotten?. Get*Pane seems. Check it.How is the

17、initial title of the view window produced by the MFC single document Ctestview?You can modify the character file in the resource file, specifically how to modify the Internet search,Another method is to join return in the PreCreateWindow function of the view classM_strTitle = single document header&

18、quot;You started another thread, CMyApp. How do you access my View class in CMyApp?If I were to regenerate a WinApp class and call AfxBeginThread (RUNTIME_CLASS) CMyApp) to start another thread, then how do I access my View class in CMyApp?I asked the question in the morning, but no one gave me the

19、answer. A master can enlighten ah1. You can pass in the class of this View as a parameter, which is the easiest solution2.You can get it in the following wayCWinApp * pA=AfxGetApp ();POSITION, pos=pA->GetFirstDocTemplatePosition ();CDocTemplate * pDT=pA->GetNextDocTemplate (POS);Pos=pDT->Ge

20、tFirstDocPosition ();CDocument * pD=pDT->GetNextDoc (POS);Pos=pD->GetFirstViewPosition ();CView * pV=pD->GetNextView (POS);Of course, the principle is that if you have multiple View, or have Doc, or even multiple DocTemplate, you can adjust it appropriatelyThe source code, I tried, and shou

21、ld be no problemHow does the MFC single document get a handle to the window of the View view (the window produced by the CmyView class instance)? In another view classGet through the App classHeader file definition: CmyView, *GetmyView ();Realization:CmyView *CmyApp: GetmyView ()If (m_pDocManager)PO

22、SITION pos1 = m_pDocManager->GetFirstDocTemplatePosition ();While (pos1)CDocTemplate *pDocTemplate = m_pDocManager->GetNextDocTemplate (pos1);If (pDocTemplate)POSITION pos2 = pDocTemplate->GetFirstDocPosition ();While (pos2)CDocument *pDoc = pDocTemplate->GetNextDoc (pos2);If (pDoc)POSITION pos3 = pDoc->GetFirstViewPosition ();While (pos3)CView *pView = pDoc->GetNextView (pos3);If (pView)If (pView->IsKindOf (RUNTIME_CLASS (CmyView)Return (CmyView*) pVi