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C++ Code_Slider

2024-07-15 08:51:49   221人阅读

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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