VC slider usage

 

Csliderctrl is a common control in MFC. Its usage is as follows:

The main methods are as follows:

1. Set and obtain the sliding range:

Void setrange (INT Nmin, int Nmax, bool bredraw = false );
Void getrange (Int & Nmin, Int & Nmax) const;
 

2. Set and obtain the sliding interval by pressing the left and right arrows:

Int setlinesize (INT nsize );
Int getlinesize () const;
 

3. Set and obtain the sliding interval when pressing pgup and pgdown:

Int setpagesize (INT nsize );
Int getpagesize () const;
 

4. Set and obtain the slider position:

Void setpos (INT NPOs );
Int getpos () const;
 

5. Set the frequency of the slider scale:

Void setticfreq (INT nfreq );

Instance:

In the dialog box, place a slider control and add the corresponding CTRL variable m_slider. In the initialization function oninitdialog () in the dialog box, add:

Bool cdlgsetup: oninitdialog ()
{
Cdialog: oninitdialog ();
 
// Todo: add extra initialization here

M_slider.setrang (0,100); // you can specify the sliding range.

M_slider.setticfreq (10); // draw a scale for every 10 units
Return true; // return true unless you set the focus to a control
// Exception: OCX property pages shold return false
}
 

The slider control does not respond to the sliding message function, but it can respond through the onhscroll () of the main form. In the Class Wizard, add the wm_hscroll message to the dialog box and add the following in the response function:

Void cdlgsetup: onhscroll (uint nsbcode, uint NPOs, cscrollbar * pscrollbar)
{
// Todo: add your message handler code here and/or call default
Csliderctrl * ps1_ctrl = (csliderctrl *) getdlgitem (idc_slider1 );
M_int = ps1_ctrlhue-> getpos (); // get the current position value
Cdialog: onhscroll (nsbcode, NPOs, pscrollbar );
}

// M_int indicates the value of the current slider.

 

Link: http://dragoon666.blog.163.com/blog/static/107009194201011159522611/