Improve company productivity with a Business Account.Sign Up


Changing views in CSplitterWnd

Posted on 1998-12-20
Medium Priority
Last Modified: 2013-11-20
IN my app (SDI MFC app), I've got a splitter wnd with 2 views, left and right. The right view has got another splitter with 2 views, top and bottom. How can I switch the top or bottom view to other CFormView derived views, depending on menu items selected by the user? Left and right views are derived from CView. Top and bottom views are derived from CFormView.

// Create left and right view in CMainFrame

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)
      if (!m_wndSplitter.CreateStatic(this,1,2))
            TRACE0("Failed to create left-right splitter window\n");
            return FALSE;

      if (!m_wndSplitter.CreateView(0,0,RUNTIME_CLASS(CViewLeft),CSize(58,0),pContext))
            TRACE0("Failed to create left view\n");
            return FALSE;
      if (!m_wndSplitter.CreateView(0,1,RUNTIME_CLASS(CViewRight),CSize(0,0),pContext))
            TRACE0("Failed to create right view\n");
            return FALSE;
      return TRUE;

// Create top and bottom views in CRightView

int CViewRight::OnCreate(LPCREATESTRUCT lpCreateStruct)
        pContext = (CCreateContext *)lpCreateStruct->lpCreateParams;
      if (CView::OnCreate(lpCreateStruct) == -1)
            return -1;
      if (!m_wndSplitter.CreateStatic(this,2,1))
            TRACE0("Failed to create the top-bottom splitter window\n");
            return FALSE;
            if (!m_wndSplitter.CreateView(0,0,RUNTIME_CLASS(CFormTop),CSize(0,130),pContext)) return FALSE;
            if (!m_wndSplitter.CreateView(1,0,RUNTIME_CLASS(CFormBottom),CSize(0,0),pContext)) return FALSE;

      return 0;
Question by:k9
LVL 12

Expert Comment

ID: 1326455
Hi! I think you must derive your own class from CSplitterWnd and add some functionality to manipulate splitter panes.
for example:
class CMySplitter:public CSplitterWnd
BOOL SubstitutePane(int row, int col, CRuntimeClass* pRuntime)

BOOL CMySplitter::SubstitutePane(int row, int col, CRuntimeClass* pRuntime)
int cxCur, cyCur, cxMin, cyMin;
GetRowInfo(row, cyCur, cyMin) ;
GetColumnInfo(col, cxCur, cxMin);
CSize sz(cxCur, cyCur);
if (!CreateView(row, col, pRuntime, sz, NULL))
    return FALSE

Author Comment

ID: 1326456
Thanks for getting back to me. Have previously tried DeleteView and CreateView to switch views. Proggie keeps falling over using above method. DeleteView works (proggie does not complain), but falls over as soon as you try CreateView for new view.

For interest:

Found different way from Ken C Len on

Create static splitter in CMainFrame as above. Derive CRightView from CFrameWnd. Create different CView/CFormView derived classes and create all views to be used in app in CRightView::OnCreateClient. Use ShowWindow(SW_SHOW) and ShowWindow(SW_HIDE) to hide and display views as needed. Couple of bugs in this implementation with CFormView derived classes.
LVL 12

Expert Comment

ID: 1326457
Ok. This way works only for static splitter not dynamic, due to splitter does not store pointers to the panes (he works with window child ID calculated from pane`s row and col).
I think to implement this way to the dynamic view you must dynamically change panes ID by ::SetWindowLong(pPane->m_hWnd, GWL_ID, uValue);
Get your problem seen by more experts

Be seen. Boost your question’s priority for more expert views and faster solutions

LVL 12

Expert Comment

ID: 1326458
Can you send me sample code (to I try to resolve problem

Expert Comment

ID: 1326459
in this case ,
i recommend you write some extra code to implement the splitterBar and treat the two views as child.

if you work with Doc Templete change the view will be very hard.


Accepted Solution

appdev earned 1600 total points
ID: 1326460
  This is a question that I answered recently...
Maybe, this is the way that you want to change the panes.
You can derive one class from CSplitterWnd.
This is the implementation file :

// Splitter.cpp : implementation file

#include "stdafx.h"              
#include "colf.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;

// CSplitter




BEGIN_MESSAGE_MAP(CSplitter, CSplitterWnd)
// NOTE - the ClassWizard will add and remove mapping macros here.

// CSplitter message handlers

BOOL CSplitter::ReplaceView(int row, int col, CRuntimeClass* pViewClass, SIZE size)
  CCreateContext context;
  BOOL bSetActive;
  //if ((GetPane(row,col)->IsKindOf(pViewClass))==TRUE)
    //   return FALSE;
   // Get pointer to CDocument object so that it can be used in the creation
   // process of the new view
   CDocument * pDoc= ((CView *)GetPane(0,0))->GetDocument();
   CView * pActiveView=GetParentFrame()->GetActiveView();
   if (pActiveView==NULL || pActiveView==GetPane(row,col))

    // set flag so that document will not be deleted when view is destroyed
    // Delete existing view
   ((CView *) GetPane(row,col))->DestroyWindow();
    // set flag back to default
    // Create new view                      
   CreateView(row,col,pViewClass,size, &context);
   CView * pNewView= (CView *)GetPane(row,col);
   if (bSetActive==TRUE)
   return TRUE;

   And this is the header file :

// Splitter.h : header file

// CSplitter frame with splitter

#ifndef __AFXEXT_H__
#include <afxext.h>

class CSplitter : public CSplitterWnd
public: //protected:
CSplitter();           // protected constructor used by dynamic creation

// Attributes

// Operations
BOOL ReplaceView(int row, int col, CRuntimeClass* pViewClass, SIZE size);

// Overrides
// ClassWizard generated virtual function overrides

// Implementation
virtual ~CSplitter();

// Generated message map functions
// NOTE - the ClassWizard will add and remove member functions here.


   Now, in your mainframe class add a member variable, this way :

CSplitter m_wndSplitter;

   Add the WM_CREATE message in the Class Wizard.    

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT /*lpcs*/,
CCreateContext* pContext)
// create splitter window
if (!m_wndSplitter.CreateStatic(this, 2, 1))
return FALSE;

if (!m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CMyUpView), CSize(200, 100), pContext) ||
!m_wndSplitter.CreateView(0, 1, RUNTIME_CLASS(CMyDownView), CSize(50, 50), pContext))
return FALSE;

return TRUE;

   You can change any view when you want it...
e.g. when the user double click on your View...

CMyUpView::OnDblclk(NMHDR* pNMHDR, LRESULT* pResult)
   ...maybe code to check the place (coordinates, item, etc) of the double click...

   SIZE size;;;
   ((CSplitter *)GetParent())->ReplaceView(1,0,RUNTIME_CLASS(CMyDownView), size);
    ((CSplitter *)GetParent())->ReplaceView(1,0,RUNTIME_CLASS(CBlankView), size);


Hope this help you.


Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

In this article, I'll describe -- and show pictures of -- some of the significant additions that have been made available to programmers in the MFC Feature Pack for Visual C++ 2008.  These same feature are in the MFC libraries that come with Visual …
Introduction: The undo support, implementing a stack. Continuing from the eigth article about sudoku.   We need a mechanism to keep track of the digits entered so as to implement an undo mechanism.  This should be a ‘Last In First Out’ collec…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
If you are looking for an automated tool which can generate reports for Outlook emails and other items from PST file, then you can go for Kernel PST Reporter tool. The reports which are created by this tool are helpful to analyze and understand PST …

585 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question