void CMainFrame::OnViewChange(UINT nCmdID)
// There is an ON_COMMAND_RANGE message map entry associated with
// OnViewChange:
// ON_COMMAND_RANGE(ID_VIEW_CHANGE1, ID_VIEW_CHANGE2, &OnViewChange)
{
   CView* pViewAdd;
   CView* pViewRemove;
   CDocument* pDoc = GetActiveDocument();

   // cvView1 and cvView2 are enum members defined in my CMainFrame class
   if((nCmdID == ID_VIEW_CHANGE1) && (m_currentView == cvView1))
      return;
   if((nCmdID == ID_VIEW_CHANGE2) && (m_currentView == cvView2))
      return;

   if (nCmdID == ID_VIEW_CHANGE2)
   {
      if (m_pView2 == NULL)
      {
         m_pView1 = GetActiveView();
         m_pView2 = new CMyView2;

         //Note that if OnSize has been overridden in CMyView2 
         //and GetDocument() is used in this override it can 
         //cause assertions and, if the assertions are ignored,
         //cause access violation.

         m_pView2->Create(NULL, NULL, AFX_WS_DEFAULT_VIEW, rectDefault, this, 
            AFX_IDW_PANE_FIRST + 1, NULL);
      }
      pViewAdd = m_pView2;
      pViewRemove = m_pView1;
      m_currentView = cvView2;
   }
   else
   {
      pViewAdd = m_pView1;
      pViewRemove = m_pView2;
      m_currentView = cvView1;
   }

   // Set the child i.d. of the active view to AFX_IDW_PANE_FIRST,
   // so that CFrameWnd::RecalcLayout will allocate to this 
   // "first pane" that portion of   the frame window's client area 
   // not allocated to control   bars.  Set the child i.d. of the 
   // other view to anything other than AFX_IDW_PANE_FIRST; this
   // examples switches the child id's of the two views.

   int nSwitchChildID = pViewAdd->GetDlgCtrlID();
   pViewAdd->SetDlgCtrlID(AFX_IDW_PANE_FIRST);
   pViewRemove->SetDlgCtrlID(nSwitchChildID);

   // Show the newly active view and hide the inactive view.

   pViewAdd->ShowWindow(SW_SHOW);
   pViewRemove->ShowWindow(SW_HIDE);

   // Connect the newly active view to the document, and
   // disconnect the inactive view.
   pDoc->AddView(pViewAdd);
   pDoc->RemoveView(pViewRemove);

   SetActiveView(pViewAdd);
   RecalcLayout();
}
Exemple #2
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/////////////////////////////////////////////////////////////////////////////
// switch to the new selected view tab
/////////////////////////////////////////////////////////////////////////////
BOOL CBonfireDoc::SwitchToView(CString strTab)
{
	if (strTab == "")
		return FALSE;

	CChildFrame*	pChild		= (CChildFrame*)g_pMainFrame->MDIGetActive();
	if (!pChild || pChild->GetActiveDocument() != this)
	{
		POSITION pos = GetFirstViewPosition();
		pChild	= (CChildFrame*)GetNextView(pos)->GetParentFrame();
	}

	if (!pChild)
		return FALSE;

	CView*			pViewAdd	= NULL;
	CBonfireView*	pGlobalView	= NULL;
	CBonfireView*	pBNewView	= NULL;
	
	// get the view to "hide"
	CView*			pViewDel	= pChild->GetActiveView();
	
	// if we're already displaying this kind of view, no need to go further.
	for (int i = 0; i < theApp.m_arAllViews.GetSize(); i++)
	{
		if ( ((CBonfireView*)theApp.m_arAllViews[i])->m_strCaption.Compare(strTab) == 0 )
		{
			pGlobalView = (CBonfireView*)theApp.m_arAllViews[i];
			break;
		}
	}

	if ( pViewDel && pViewDel->IsKindOf(pGlobalView->m_pClass) )
		return TRUE;

	// check if a view of this type already exists
 	if ( !m_pViews->Lookup(pGlobalView->m_strCaption, (void*&)pBNewView) )
	{
		// doesn't exist so create a new view
		pViewAdd = (CView*)pGlobalView->m_pClass->CreateObject();
		if (pViewAdd == NULL)
		{
			TRACE1("Warning: Dynamic create of view type %Fs failed\n", pGlobalView->m_pClass->m_lpszClassName);
			return FALSE;
		}

		// draw new view
		CCreateContext context;
		context.m_pNewViewClass		= pGlobalView->m_pClass;
		context.m_pCurrentDoc		= NULL;
		context.m_pNewDocTemplate	= this->GetDocTemplate();
		context.m_pLastView			= NULL;
		context.m_pCurrentFrame		= pChild;

		// draw new view
		if (!pViewAdd->Create(NULL, NULL, AFX_WS_DEFAULT_VIEW, CRect(0, 0, 0, 0),
			pChild, AFX_IDW_PANE_FIRST, &context))
		{
			TRACE0("Warning: couldn't create view for frame\n");
			delete pViewAdd;
			return FALSE;
		}

		// add the view to the map
		pBNewView			= new CBonfireView(pGlobalView);
		pBNewView->m_pView	= pViewAdd;
		pBNewView->m_pClass	= pViewAdd->GetRuntimeClass();

		// add this view to the document's map
		AddViewToMap(pBNewView);

		// WM_INITIALUPDATE is defined in afxpriv.h
		pViewAdd->SendMessage(WM_INITIALUPDATE,0,0);

		// connect the view to the document
		AddView(pViewAdd);
	}
	else
	{
		pViewAdd = pBNewView->m_pView;
	}

	// save file on switching views
	if (theApp.m_opOptions.general.dwSaveOnSwitch && !m_xTextBuffer.GetReadOnly() && pViewDel)
		DoFileSave();
	
	CSplitterWnd*	pSplitter	= NULL;
	POSITION pos				= GetFirstViewPosition();
	BOOL firstOne				= true;
	while (pos)
	{
		CView* pv	= GetNextView(pos);
		if (pv == pViewAdd)	
		{
			pv->SetDlgCtrlID(AFX_IDW_PANE_FIRST);

			// show the view
			if (pBNewView->m_bAllowsSplitter)
			{
				pSplitter	= (CSplitterWnd*)pViewAdd->GetParent();
				
				// show the splitter (show the children view(s) as well)
				pSplitter->ShowWindow(SW_SHOW);
			}
			else
				// show the view
				pViewAdd->ShowWindow(SW_SHOW);
		}
		else 
		{
			// check if the view is inside a splitter
			if (pv->GetParent()->GetRuntimeClass() == (CRuntimeClass*)RUNTIME_CLASS(CSplitterWnd))
			{
				pSplitter	= (CSplitterWnd*)pv->GetParent();
				
				// hide the splitter (hide all views with the splitter)
				pSplitter->ShowWindow(SW_HIDE);
			}
			else
			{
				// hide the view
				pv->ShowWindow(SW_HIDE);
				pv->SetDlgCtrlID(AFX_IDW_PANE_FIRST + 255);
			}
		}

		TRACE("%s (%d) ", pv->GetRuntimeClass()->m_lpszClassName, (unsigned)(pv->GetDlgCtrlID() - AFX_IDW_PANE_FIRST));
		if (pv == pViewDel)		TRACE("= D ");
		if (pv == pViewAdd)		TRACE("= A ");
		if (pv->GetRuntimeClass() == pGlobalView->m_pClass)
		{
			if (firstOne)
				firstOne = false;
			else
				TRACE("removing ");
		}
	}
	TRACE("\n");

	// get rid of extra views created by the splitter
	if (pSplitter)
	{
		for (int cols = 1; cols < pSplitter->GetColumnCount(); cols++)
			pSplitter->DeleteColumn(cols);
		for (int rows = 1; rows < pSplitter->GetRowCount(); rows++)
			pSplitter->DeleteRow(rows);

		pSplitter->RecalcLayout();
	}

	pViewAdd->UpdateWindow();
	pChild->SetActiveView(pViewAdd);
	pChild->RecalcLayout();

	if (pBNewView->m_bModifiedSinceRefresh)
	{
		pBNewView->m_bModifiedSinceRefresh = FALSE;
		if (pGlobalView->m_pClass == RUNTIME_CLASS(CXMLTreeView))
		{
			((CXMLTreeView*)pViewAdd)->RefreshView();
		}
		else if (pGlobalView->m_pClass == RUNTIME_CLASS(CBrowserView))
		{
			((CBrowserView*)pViewAdd)->RefreshView();
		}
		else
		{
			pBNewView->m_bModifiedSinceRefresh = TRUE;
		}
	}

	return TRUE;
}