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VC++ MFC Example: A Slider Control, CSliderCtrl

 
Pedro Pombeiro  

What does it do?

This derivation of CSliderCtrl allows the user to use the mouse or the keyboard to select a range in the slider control. The program can then use CSliderCtrl::GetSelection() to retrieve the range selected by the user. This is the way I thought that CSliderCtrl worked in the first place, only to discover that the selection was just a static representation of the values set by CSliderCtrl::SetSelection(). This class corrects this shortcoming of the slider control.

How to use it?

This code was originally compiled and tested with Visual C++ 4.2 and WinNT 4.0 SP4. It should not present any problem when using a more recent version of the compiler.

Be aware that you need to turn on the TBS_ENABLESELRANGE style for the control.

The usage is very simple you just have to include the files in your project, replace the ocurrences of CSliderCtrl in your code for CSelectionSliderCtrl and include SelectionSliderCtrl.h. For example


// MyDialog.h  header file
//


/////////////////////////////////////////////////////////////////////////////
// CMyDialog dialog


#include "SelectionSliderCtrl.h"

class CMyDialog  public CDialog
{
...


// Dialog Data
	//{{AFX_DATA(CMyDialog)
	enum { IDD = IDD_MY_DIALOG };
	//}}AFX_DATA
	CSelectionSliderCtrl	m_sliderTest;
...
};

Download source - 3 Kb

 

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