mfc如何在文档cxxx类或框架cmainframe类中获得视类cmyviewHow d.docx

mfc如何在文档cxxx类或框架cmainframe类中获得视类cmyviewHow d.docx

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mfc如何在文档cxxx类或框架cmainframe类中获得视类cmyviewHowd

mfc如何在文档（cxxxdoc）类或框架（cmainframe）类中获得视类（cmyview（HowdoesMFCgetavisualclassinthedocument（cxxxdoc）classorCMainFrameclass（cmyview））

HowdoesMFCgetavisualclassinthedocument（CXXXDoc）classorCMainFrameclass（CMyView.txt）

HowdoesMFCgettheviewclass（CMyView）pointerinthedocument（CXXXDoc）classortheframework（CMainFrame）class?

Inthedocumentclass,justusethe（multidocument,singledocument,alittlesimpler）

POSITION（pos=this->GetFirstViewPosition）;//towriteinthedocumentclass,toreplacethisdocumentpointercanbeinotherclasses

While（POS）

{

CView*pView=this->GetNextView（POS）;

}

Intheframeworkclass,justselectthedocumentobject,andthenusethecodeabove

Here'sanaspectofgettinganotherobjectfromanobject（excerptfromMFC）

Themethodofobtaininganotherobjectfromanobject

Thememberfunctionsusedbytheobjecttobeobtainedbythisobject

CDocumentobjectviewlistGetFirstViewPosition,GetNextView

DocumenttemplateGetDocTemplate

CViewobjectdocumentobjectGetDocument

BorderwindowGetParentFrame

CMDIChildWndor

CFrameWndobjectactivityviewGetActiveView

ActivevisualdocumentGetActiveDocument

CMDIFrameWndobject,activedocument,borderwindow,MDIGetActive

UseGetActiveView（）intheframeworkclass;

Inthedocumentclass（CMainFrame*）（AfxGetApp（）->m_pMainWnd））->GetActiveView（）;

HowdoesMFCgetthepointertotheViewclassunderCMainFrame?

UsingtheGetActiveView（）function

HowdoordinaryclassesinMFCgetpointerstotheviewclass?

HowdoIgetpointerstotheviewclassintheclass（Generic）?

I'vetriedthat:

CMainFrame*p=（CMainFrame*）AfxGetMainWnd（）;

CView,*pv=p->GetActiveView（）;

Accordingtoyourusage,that'sallright!

IsthistheViewthathasn'tbeencreatedyet,soPVisempty?

.

CMainFrame*m_pfm=（CMainFrame*）AfxGetApp（）->m_pMainWnd;

...*m_pView=（*）m_pfm->GetActiveView（）;

Onelessword:

AfxGetApp（）

CMainFrame*p=（CMainFrame*）AfxGetApp（）->m_pMainWnd;

CView*pv=（CView*）p->GetActiveView（）;

Upstairsinchargeofbuildinganalysis,asequenceoffunctioncalls,notwhatisPreCreateWindoworCXXXApp,theconstructoroftheCXXXFrameInitInstance,themainwindowtemplatedidnotfinishforthemanipulationoftheCView.

Asdfasdf

HowdoIreturnapointertoaclassinMFC,suchasCWIN,view,andsoon!

IntheCViewclass,callthis->GetDocument（）togetdoc.

IntheCDocumentclass,callGetFirstViewPosition（）andGetNextView（）togetalltheview.

Inotherclasses,onemethodistopassthepointerinforthecalltouse.

Also,yougetCWinAppwithAfxGetApp（）,thenGetFirstDocTemplatePosition（）andGetNextDocTemplate（）togetthedoctemplate,andthencallGetFirstDocPosition（）andGetNextDoc（）togetthedoc.

HowdoIgetthepointeroftheViewclass（this）orthepointerofthewholedialogboxintheOnDrawfunctionorthe***Dlgfunction?

Inasingledocument,youcanusethefollowingmethods:

Thefilewhereyouwanttogetthepointernowcontainstwofilesatthestart:

Viewofthemainframeclassheaderfile,thatis,#include"MainFrm.h""

Viewclassheaderfile,thatis,#include"XXView.h""

Thenaddthefollowingstatementatthepointwhereyouwanttoaccessthem_pSet

CMainFrame*frm=（CMainFrame*）AfxGetApp（）->m_pMainWnd;

CXXView*pView=（CXXView*）frm->GetActiveView（）;

PView,thatis,theViewclasspointer

Butisn'titeasierforyoutousethis?

InthesingledocumentofMFC,theviewwindowhandleproducedbyCtestviewisobtainedfromthetreeviewclassofaview

Getsthewindowhandleoftheviewinthesingledocumentframework.Askforapieceofcode.Checkonline,didnotgetitout.Whichbrotherhastimetowriteaparagraph?

.

You'renotclear.Therearemanywaystocarryitout.

YoucangettheviewpointerthroughtheglobalobjecttheApp,andthen

Viewpointer->GetSafeHwnd（）;getsthehandle.

Youcanalsosendcustommessagestosendthehandletothespecifiedwindowclass.

YoucanalsodefineaCviewpointerinyourstdafx.h,whichpointstotheViewclassduringtheinitializationprocess,andisusedinyourtreeview.

Youcanalsoreceiveahandleforthetreeviewclassdefinitionmethodbyitself,whencalled.

Notethatyoucanhandlethecreationsequence,orelseyouwillmakeanassertionerrorunderdebug.

Themethodisreallyalot.

Ifyoudonotusethedocument/viewstructure,thesingledocumentiscreatedinthebuildframewindow.Thereisavariablecalledm_wndView.Thisisthehandle.He'saCWndderivative.

Ifyouusethedocument/viewstructure,directGetActiveViewisfine.

Thereisonemorecase,ifyouusethesplitwindow.......

Whichfunctionhasbeenforgotten?

.Get***Paneseems..Checkit.

HowistheinitialtitleoftheviewwindowproducedbytheMFCsingledocumentCtestview?

Youcanmodifythecharacterfileintheresourcefile,specificallyhowtomodifytheInternetsearch,

AnothermethodistojoinreturninthePreCreateWindowfunctionoftheviewclass

M_strTitle=singledocumentheader";

Youstartedanotherthread,CMyApp.HowdoyouaccessmyViewclassinCMyApp?

IfIweretoregenerateaWinAppclassandcallAfxBeginThread（（RUNTIME_CLASS）CMyApp）tostartanotherthread,thenhowdoIaccessmyViewclassinCMyApp?

Iaskedthequestioninthemorning,butnoonegavemetheanswer.Amastercanenlightenah

1.YoucanpassintheclassofthisViewasaparameter,whichistheeasiestsolution

2.

Youcangetitinthefollowingway

CWinApp*pA=AfxGetApp（）;

POSITION,pos=pA->GetFirstDocTemplatePosition（）;

CDocTemplate*pDT=pA->GetNextDocTemplate（POS）;

Pos=pDT->GetFirstDocPosition（）;

CDocument*pD=pDT->GetNextDoc（POS）;

Pos=pD->GetFirstViewPosition（）;

CView*pV=pD->GetNextView（POS）;

Ofcourse,theprincipleisthatifyouhavemultipleView,orhaveDoc,orevenmultipleDocTemplate,youcanadjustitappropriately

Thesourcecode,Itried,andshouldbenoproblem

HowdoestheMFCsingledocumentgetahandletothewindowoftheViewview（thewindowproducedbytheCmyViewclassinstance）?

Inanotherviewclass

GetthroughtheAppclass

Headerfiledefinition:

CmyView,*GetmyView（）;

Realization:

CmyView*CmyApp:

:

GetmyView（）

{

If（m_pDocManager）

{

POSITIONpos1=m_pDocManager->GetFirstDocTemplatePosition（）;

While（pos1）

{

CDocTemplate*pDocTemplate=m_pDocManager->GetNextDocTemplate（pos1）;

If（pDocTemplate）

{

POSITIONpos2=pDocTemplate->GetFirstDocPosition（）;

While（pos2）

{

CDocument*pDoc=pDocTemplate->GetNextDoc（pos2）;

If（pDoc）

{

POSITIONpos3=pDoc->GetFirstViewPosition（）;

While（pos3）

{

CView*pView=pDoc->GetNextView（pos3）;

If（pView）

{

If（pView->IsKindOf（RUNTIME_CLASS（CmyView））

Return（CmyView*）pView;

}

}

}

}

}

}

}

ReturnNULL;

}

Addapoint,ifyouareasplitviewgeneratedbystaticsegmentation,canmakefulluseoftheGetPanefunction,suchasCSplitterWnd,CmyViewtogetthewindowhandleinCmylView（assumingCmyViewinsegmentationof0rowsand0columns）:

CSplitterWnd*ps=（CSplitterWnd*）GetParent（）;

CmyView*pView=（CmyView*）（ps->GetPane（0,0））;

PView->m_hWndgetsthehandletotheviewform

Simple:

becauseyouhavemorethanoneclassofview,onlythehandleofthewindowismeaningfulonlywhenyougettheViewview（thewindowproducedbytheCmyViewclassinstance）whenyourviewclassisactive!

Aslongasafunctioncanbesolved.

CView*GetActiveView（）const;

GetActiveView（）getsthecurrentactiveviewclasswindowhandle