C++ Code_Slider

主题

1. 滑块控件属性设置

2. 使用滑块控件设置颜色

3. 显示Slider的数值

4.

5.

    

属性

滑块控件属性设置

//代码设置属性

 

    

代码::

 

/////////////////////////////////////////////////////////////////////////////

// CProject02Dlg dialog

//class CProject02Dlg : public CDialog

//{

// Construction

//public:

//    CProject02Dlg(CWnd* pParent = NULL);    // standard constructor

    COLORREF m_clColor;

// Dialog Data

在CProject02Dlg中右键添加个Add MemberFunction

 

void CProject02Dlg::updatePicCtrl()

{

    CDC * pDC = m_ctrl_pic1.GetDC();

    CRect rc;

    m_ctrl_pic1.GetClientRect(rc);

    pDC -> FillRect(rc, & CBrush(m_clColor));

    m_ctrl_pic1.ReleaseDC(pDC);

}

 

在BOOL CProject02Dlg::OnInitDialog() 部分添加slider的初始化部分代码

    // TODO: Add extra initialization here

    m_ctrl_Slider1_Red.SetRange(0,255,FALSE);

    m_ctrl_Slider2_Green.SetRange(0,255,FALSE);

    m_ctrl_Slider3_Blue.SetRange(0,255,FALSE);

 

 

void CProject02Dlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)

{

 

    // TODO: Add your message handler code here and/or call default

    if (nSBCode == SB_THUMBTRACK)

    {

        if (pScrollBar -> m_hWnd == m_ctrl_Slider1_Red.m_hWnd)

        {

            m_nEdt1_Red = nPos;

            UpdateData(FALSE);

        }

        

        if (pScrollBar -> m_hWnd == m_ctrl_Slider2_Green.m_hWnd)

        {

            m_nEdt2_Green = nPos;

            UpdateData(FALSE);

        }

        

        if (pScrollBar -> m_hWnd == m_ctrl_Slider3_Blue.m_hWnd)

        {

            m_nEdt3_Blue = nPos;

            UpdateData(FALSE);

        }

        

        m_clColor = RGB(m_nEdt1_Red,m_nEdt2_Green,m_nEdt3_Blue);

        updatePicCtrl();

    }

    CDialog::OnHScroll(nSBCode, nPos, pScrollBar); }

 

//为每个Edit添加个EN_Change消息

void CProject02Dlg::OnChangeEdit1()

{

    // TODO: If this is a RICHEDIT control, the control will not

    // send this notification unless you override the CDialog::OnInitDialog()

    // function and call CRichEditCtrl().SetEventMask()

    // with the ENM_CHANGE flag ORed into the mask.

    

    // TODO: Add your control notification handler code here

    UpdateData(TRUE);

    m_ctrl_Slider1_Red.SetPos(m_nEdt1_Red);

    updatePicCtrl();    

}

void CProject02Dlg::OnChangeEdit2()

{

    // TODO: If this is a RICHEDIT control, the control will not

    // send this notification unless you override the CDialog::OnInitDialog()

    // function and call CRichEditCtrl().SetEventMask()

    // with the ENM_CHANGE flag ORed into the mask.

    

    // TODO: Add your control notification handler code here

    UpdateData(TRUE);

    m_ctrl_Slider2_Green.SetPos(m_nEdt2_Green);

    updatePicCtrl();    

}

 

void CProject02Dlg::OnChangeEdit3()

{

    // TODO: If this is a RICHEDIT control, the control will not

    // send this notification unless you override the CDialog::OnInitDialog()

    // function and call CRichEditCtrl().SetEventMask()

    // with the ENM_CHANGE flag ORed into the mask.

    

    // TODO: Add your control notification handler code here

    UpdateData(TRUE);

    m_ctrl_Slider3_Blue.SetPos(m_nEdt3_Blue);

    updatePicCtrl();

    

}

    

效果图：

 

 

 

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