Static creation of multiple views in a single MFC Document

Recently, when working on a lab project, you need to generate a single-document multi-view structure under MFC, after several hours of searching and checking on the internet, I finally found a feasible and understandable solution:

First, because it is a static creation, it must first initialize the view you want to create. Note that all my operations are performed in the ** App class.

1 private:

2 CView * m_pView [4];

In the App class, I declare a view array, initialize it in InitInstance, and create a view.

View class initialization

1 CView * m_pActiveView = (CFrameWnd *) m_pMainWnd)-> GetActiveView ();

2 m_pView [0] = m_pActiveView; // assign it directly because m_pView [0] is displayed at the beginning

3 m_pView [1] = new CProductionFormView;

4 m_pView [2] = new CEventsListView;

5 m_pView [3] = new CRunningFormView;

6 // initialize the context, mainly the document pointer, and create other views

7 CCreateContext context;

8 context. m_pCurrentDoc = (CFrameWnd *) m_pMainWnd)-> GetActiveDocument ();

9 m_pView [1]-> Create (NULL, NULL, (AFX_WS_DEFAULT_VIEW &~ WS_VISIBLE), CFrameWnd: rectDefault, m_pMainWnd, AFX_IDW_PANE_FIRST + 1, & context );

10 m_pView [2]-> Create (NULL, NULL, (AFX_WS_DEFAULT_VIEW &~ WS_VISIBLE), CFrameWnd: rectDefault, m_pMainWnd, AFX_IDW_PANE_FIRST + 2, & context );

11 m_pView [3]-> Create (NULL, NULL, (AFX_WS_DEFAULT_VIEW &~ WS_VISIBLE), CFrameWnd: rectDefault, m_pMainWnd, AFX_IDW_PANE_FIRST + 3, & context );

12 // We need to manually call the update function

13 for (int I = 0; I <4; I ++)

14 m_pView [I]-> OnInitialUpdate ();

I add the Command Message response view switch to the menu. The entire switch is completed in the SwitchView function. Its definition is as follows:

SwitchView

1 void CCardSystemApp: SwithToView (int nView)

2 {

3 ASSERT (nView> = 0 & nView <= 4 );

4 CView * pOldActiveView = (CFrameWnd *) m_pMainWnd)-> GetActiveView ();

5 CView * pNewActiveView = m_pView [nView];

6 ASSERT (pNewActiveView );

7 if (pNewActiveView = pOldActiveView)

8 return;

9

10 // switch the window ID of the view so that RecalcLayout () can work

11 UINT temp =: GetWindowLong (pOldActiveView-> m_hWnd, GWL_ID );

12: SetWindowLong (pOldActiveView-> m_hWnd, GWL_ID,: GetWindowLong (pNewActiveView-> m_hWnd, GWL_ID ));

13: SetWindowLong (pNewActiveView-> m_hWnd, GWL_ID, temp );

14

15 pOldActiveView-> ShowWindow (SW_HIDE );

16 pNewActiveView-> ShowWindow (SW_SHOW );

17

18 (CFrameWnd *) m_pMainWnd)-> SetActiveView (pNewActiveView );

19 (CFrameWnd *) m_pMainWnd)-> RecalcLayout ();

20 pNewActiveView-> Invalidate ();

21

22}