Doc/View结构中的多视图的切换

多文档、多视图的切换

void  CMainFrame::SwitchView(CMultiDocTemplate *  pDocTemplate)
... {
    CDocument* pDoc = NULL;
    POSITION pos    = pDocTemplate->GetFirstDocPosition();
    CView* pActiveView      = GetActiveFrame()->GetActiveView();

    if( pos == NULL )
    ...{
        // create new document
        pDoc = (CTouchNetDoc*)pDocTemplate->OpenDocumentFile(NULL);
    }
    else
    ...{
        while (pos) 
        ...{
            // get the document object
            pDoc = pDocTemplate->GetNextDoc(pos);
            POSITION pos2 = pDoc->GetFirstViewPosition();
            if (pos2) 
            ...{
                CView *pView = pDoc->GetNextView(pos2);
                CFrameWnd* pNewFrame = pView->GetParentFrame();

                ASSERT(pNewFrame);
                if ( pNewFrame->GetParentFrame() == this )
                    break;
            }
        }

        if ( pDoc == NULL )
            pDoc = (CTouchNetDoc*)pDocTemplate->OpenDocumentFile(NULL);
    }

    // find the target view object of pDoc
    CView *pTargetView = NULL;
    pos = pDoc->GetFirstViewPosition();
    while (pos) 
    ...{
        CView *pView = pDoc->GetNextView(pos);
        if ( pView )
        ...{
            pTargetView = pView;
            break;
        }
    }

    if (pTargetView)
    ...{
        if ( pActiveView != pTargetView )
        ...{
            // show the frame window of target view.
            CFrameWnd* pNewFrame = (CFrameWnd* )pTargetView->GetParentFrame();
            pNewFrame->ActivateFrame();
            pNewFrame->SetActiveView(pTargetView);
            
            pTargetView->OnInitialUpdate();
            //call pTargetView to do something
        }
    }
}

 

单文档、多视图的切换

void  CMainFrame::SwitchView( const   int  nViewId)
... {
    CView* pOldView      = GetActiveView();
    CDocument* pDoc = pOldView->GetDocument();

    CCreateContext context;
    context.m_pCurrentDoc = pDoc;
    CView* pNewView = NULL;

    switch(nViewId)
    ...{
    case eBrowseView:
        context.m_pNewViewClass = RUNTIME_CLASS(CBView1);
        break;

    case eHttpView:
        context.m_pNewViewClass = RUNTIME_CLASS(CView2);
        break;

    default:
        break;
    }

    pNewView = (CView*)CreateView(&context);
    SetActiveView(pNewView);
    pNewView->ShowWindow(SW_SHOW);
    pOldView->ShowWindow(SW_HIDE);

    // call pNewView to do something 

    pOldView->DestroyWindow();

    RecalcLayout();
}