Show/Hide Static Panes

MFC static splitter windows have a significant limitation. Their panes can't be hidden or shown dynamically. To solve the problem I overrode the CSplitterWnd. The new class can hide a splitter window column. Sure, it's only one approach to the problem, but it's a good example anyway.

//////////////////////////////////////////////////////////////////
//
// splitex.h
// (c) 1997, Oleg G. Galkin

class CSplitterWndEx : public CSplitterWnd
{
protected:
   int m_nHidedCol;    // hide column number, -1 if all columns
                       // are shown

public:
   CSplitterWndEx();

   void ShowColumn();
   void HideColumn(int colHide);

// ClassWizard generated virtual function overrides
   //{{AFX_VIRTUAL(CSplitterWndEx)
   //}}AFX_VIRTUAL

// Generated message map functions
protected:
   //{{AFX_MSG(CSplitterWndEx)
      // NOTE - the ClassWizard will add and remove member
      //        functions here.
      //}}AFX_MSG

    DECLARE_MESSAGE_MAP()
};

//////////////////////////////////////////////////////////////////
//
// splitex.cpp
// (c) 1997, Oleg G. Galkin

#include "stdafx.h"
#include "splitex.h"

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

//////////////////////////////////////////////////////////////////
/
// CSplitterWndEx

CSplitterWndEx::CSplitterWndEx() :
    m_nHidedCol(-1)
{
}

void CSplitterWndEx::ShowColumn()
{
   ASSERT_VALID(this);
   ASSERT(m_nCols < m_nMaxCols);
   ASSERT(m_nHidedCol != -1);

   int colNew = m_nHidedCol;
   m_nHidedCol = -1;
   int cxNew = m_pColInfo[m_nCols].nCurSize;
   m_nCols++;    // add a column
   ASSERT(m_nCols == m_nMaxCols);

   // fill the hidden column
   int col;
   for (int row = 0; row < m_nRows; row++)
   {
      CWnd* pPaneShow = GetDlgItem(
         AFX_IDW_PANE_FIRST + row * 16 + m_nCols);
      ASSERT(pPaneShow != NULL);
      pPaneShow->ShowWindow(SW_SHOWNA);

      for (col = m_nCols - 2; col >= colNew; col--)
      {
         CWnd* pPane = GetPane(row, col);
         ASSERT(pPane != NULL);
         pPane->SetDlgCtrlID(IdFromRowCol(row, col + 1));
      }

      pPaneShow->SetDlgCtrlID(IdFromRowCol(row, colNew));
   }

   // new panes have been created -- recalculate layout
   for (col = colNew + 1; col < m_nCols; col++)
      m_pColInfo[col].nIdealSize = m_pColInfo[col - 1].nCurSize;
   m_pColInfo[colNew].nIdealSize = cxNew;
   RecalcLayout();
}

void CSplitterWndEx::HideColumn(int colHide)
{
   ASSERT_VALID(this);
   ASSERT(m_nCols > 1);
   ASSERT(colHide < m_nCols);
   ASSERT(m_nHidedCol == -1);
   m_nHidedCol = colHide;

   // if the column has an active window -- change it
   int rowActive, colActive;
   if (GetActivePane(&rowActive, &colActive) != NULL &&
       colActive == colHide)
   {
      if (++colActive >= m_nCols)
         colActive = 0;
      SetActivePane(rowActive, colActive);
   }

   // hide all column panes
   for (int row = 0; row < m_nRows; row++)
   {
      CWnd* pPaneHide = GetPane(row, colHide);
      ASSERT(pPaneHide != NULL);
      pPaneHide->ShowWindow(SW_HIDE);
      pPaneHide->SetDlgCtrlID(
         AFX_IDW_PANE_FIRST + row * 16 + m_nCols);

      for (int col = colHide + 1; col < m_nCols; col++)
      {
         CWnd* pPane = GetPane(row, col);
         ASSERT(pPane != NULL);
         pPane->SetDlgCtrlID(IdFromRowCol(row, col - 1));
      }
   }
   m_nCols--;
   m_pColInfo[m_nCols].nCurSize = m_pColInfo[colHide].nCurSize;
    RecalcLayout();
}

BEGIN_MESSAGE_MAP(CSplitterWndEx, CSplitterWnd)
//{{AFX_MSG_MAP(CSplitterWndEx)
   // NOTE - the ClassWizard will add and remove mapping macros here.
//}}AFX_MSG_MAP
END_MESSAGE_MAP()


Comments

  • Dr

    Posted by wang gang on 03/05/2015 06:42pm

    Very usefule!Thanks

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • While successful mobile apps can elevate and transform your brand, hidden deployment disasters can tear down all your hard work in the blink of an eye. Download this white paper to avoid disasters of: Scale Microdowntime and connectivity Location data Upfront costs

  • Are you truly leading your team or simply managing them? Organizations need leaders and your team needs someone to follow. With some ongoing development, you could become that leader. Learn the top leadership qualities that inspire others to want to follow you and the direction of your company.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date