图形图像处理

开发平台：

Visual C++

ColorEdit.cpp：源码内容

							#include "stdafx.h"
#include "ColorEdit.h"
#include "RGB.h"
CColorEdit::CColorEdit()
{
}
CColorEdit::~CColorEdit()
{
}
BEGIN_MESSAGE_MAP(CColorEdit, CEdit)
	//{{AFX_MSG_MAP(CColorEdit)
	ON_WM_MOUSEMOVE()
	ON_WM_TIMER()
	ON_WM_CTLCOLOR()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
BOOL CColorEdit::OnChildNotify(UINT message, WPARAM wParam, LPARAM lParam, LRESULT* pLResult) 
{
        if (message != WM_CTLCOLOREDIT)
        {
                 return CEdit::OnChildNotify(message,wParam,lParam,pLResult);
        }
        HDC hdcChild = (HDC)wParam;
        if( m_bOverControl )
        {
                SetTextColor(hdcChild, m_crHotFg);
                SetBkColor(hdcChild, m_crHotBg);
                *pLResult = (LRESULT)(m_pHotBrush->GetSafeHandle());
        }
        else
        {
                SetTextColor(hdcChild, m_crFg);
                SetBkColor(hdcChild, m_crBg);
                *pLResult = (LRESULT)(m_pBrush->GetSafeHandle());
        }
        return TRUE;
} 	
void CColorEdit::OnMouseMove(UINT nFlags, CPoint point) 
{
        if (!m_bOverControl)
        {
                m_bOverControl = TRUE;
                Invalidate();
                SetTimer(m_nTimerID, m_iRolloverDelay, NULL);
        }
	CEdit::OnMouseMove(nFlags, point);
}
void CColorEdit::OnTimer(UINT nIDEvent) 
{
        CPoint p(GetMessagePos());
        ScreenToClient(&p);
        CRect rect;
        GetClientRect(rect);
        if (!rect.PtInRect(p))
        {
                m_bOverControl = FALSE;
                KillTimer(m_nTimerID);
                Invalidate();
        }	
	CEdit::OnTimer(nIDEvent);
}
HBRUSH CColorEdit::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
	HBRUSH hbr = CEdit::OnCtlColor(pDC, pWnd, nCtlColor);
        if( m_bOverControl )
        {
                pDC->SetTextColor(m_crHotFg);
                pDC->SetBkColor(m_crHotBg);
                hbr = *m_pHotBrush;
        }
        else
        {
                pDC->SetTextColor(m_crFg);
                pDC->SetBkColor(m_crBg);
                hbr = *m_pBrush;
        }
	return hbr;
}

						