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

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  • Your email address will not be published.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

Top White Papers and Webcasts

  • With 81% of employees using their phones at work, companies have stopped asking: "Is corporate data leaking from personal devices?" and started asking: "How do we effectively prevent corporate data from leaking from personal devices?" The answer has not been simple. ZixOne raises the bar on BYOD security by not allowing email data to reside on the device. In addition, Zix allows employees to maintain complete control of their personal device, therefore satisfying privacy demands of valued employees and the …

  • Managing your company's financials is the backbone of your business and is vital to the long-term health and viability of your company. To continue applying the necessary financial rigor to support rapid growth, the accounting department needs the right tools to most efficiently do their job. Read this white paper to understand the 10 essentials of a complete financial management system and how the right solution can help you keep up with the rapidly changing business world.

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds