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Highlight view with focus

, 10 Jan 2000 69.2K 23
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Adding visual feedback on which pane in a split view currently has the focus
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Many times it would be nice to have some visual feedback as to which pane in a split view currently has the focus. This is very useful if you have multiple view types and different keyboard strokes cause different actions in each.

NOTE: This uses an undocumented feature in MFC so be careful in the future.

Step 1) Derive your own SplitterWnd class.
Step 2) Override the undocumented OnDrawSplitter function.
Step 3) Replace the CSplitterWnd instance in the child frame with your splitter.

This example draws in red but you can adjust the color and width of the frame by altering the define values.

// MySplitterWnd.h

class MySplitterWnd : public CSplitterWnd
    int cRow;
    int cCol; 
    void OnDrawSplitter(CDC* pDC, ESplitType nType, const CRect& rectArg);
    void RefreshSplitBars(void);

// MySplitterWnd.cpp

#include "StdAfx.h"
#include "MySplitterWnd.h"

#define FOCUS_HILIGHT_COLOR_ULO RGB(180, 75, 25)
#define FOCUS_HILIGHT_COLOR_LRO RGB(245, 5, 25)
#define FOCUS_HILIGHT_COLOR_ULI RGB(145, 95, 75)
#define FOCUS_HILIGHT_COLOR_LRI RGB(220, 65, 40)


#define SPLITTER_CX 4
#define SPLITTER_CY 4

void MySplitterWnd::RefreshSplitBars(void)
    CRect rectInside;

    DrawAllSplitBars(NULL, rectInside.right, rectInside.bottom);

    cRow = 0;
    cCol = 0;

    m_cxSplitter = SPLITTER_CX;
    m_cySplitter = SPLITTER_CY;
    m_cxSplitterGap = SPLITTER_GAPX;
    m_cySplitterGap = SPLITTER_GAPY;

void MySplitterWnd::OnDrawSplitter(CDC* pDC, ESplitType nType,
                                   const CRect& rectArg)
    if ((FOCUS_HILIGHT_SHOW) && ((GetRowCount() > 1) || 
        (GetColumnCount() > 1)) && (nType == splitBorder))
        int pRow = 0;
        int pCol = 0;
        if (
            pRow = 1;
        if (rectArg.left)
            pCol = 1;
        if ((cRow == pRow) && (cCol == pCol))
            if (pDC == NULL)
                RedrawWindow(rectArg, NULL, RDW_INVALIDATE|RDW_NOCHILDREN);
            CRect rect = rectArg;



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About the Author

Randy More

United States United States
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Comments and Discussions

General3 static splitter window Pin
weilun31-Aug-04 21:01
sussweilun31-Aug-04 21:01 
GeneralMFC7 unhandled exception Pin
Nate Strandberg9-Jul-03 18:16
memberNate Strandberg9-Jul-03 18:16 
Hey I keep getting an unhandled exception when I try to use this code in an MFC7 SDI application.. I know it works and I'm doing it right because I can use it with MFC6 fine.

Anyway, down to business. The problem is in the function "RefreshSplitBars" and the line that causes it is "GetInsideRect".. I don't know what Microsoft changed in MFC7 that would make this fail, but does anyone have an idea on how to fix it?

Nate S.
GeneralStatic Splits Pin
David Jones17-Jan-02 5:06
memberDavid Jones17-Jan-02 5:06 
Questionhow to access these protected functions Pin
Darren Schroeder9-May-00 6:46
sussDarren Schroeder9-May-00 6:46 

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