jmcombobox.cpp

其实跟上面一个是一样一样一样一样一样一样一样一样一样一样一样一样一样一样一样一样一样的

// JMComboBox.cpp : implementation file
//

#include "stdafx.h"
#include "EasyMap.h"
#include "JMComboBox.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CJMComboBox

CJMComboBox::CJMComboBox()
{
 	 m_dwStyle = CBS_OWNERDRAWFIXED|CBS_DROPDOWNLIST|CBS_SIMPLE|WS_VSCROLL\
		         |CBS_NOINTEGRALHEIGHT| WS_BORDER |WS_VISIBLE| WS_CHILD;
	 m_clrHilight		= ::GetSysColor(COLOR_HIGHLIGHT);
     m_clrNormalText	= ::GetSysColor(COLOR_WINDOWTEXT);
     m_clrHilightText	= ::GetSysColor(COLOR_HIGHLIGHTTEXT);
     m_clrBkgnd			= ::GetSysColor(COLOR_MENU);


}

CJMComboBox::~CJMComboBox()
{
}


BEGIN_MESSAGE_MAP(CJMComboBox, CComboBox)
	//{{AFX_MSG_MAP(CJMComboBox)
	ON_WM_CREATE()
	ON_WM_DESTROY()
	ON_WM_SYSCOLORCHANGE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CJMComboBox message handlers

void CJMComboBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	CDC *pDC   = ::CDC::FromHandle(lpDrawItemStruct->hDC );
	CRect RC   = lpDrawItemStruct->rcItem;
	int iState = lpDrawItemStruct->itemState;
	int iItemID  = lpDrawItemStruct->itemID; 
    CString strText;   
	
	pDC->SetBkMode( TRANSPARENT ); 
    if ( iState == ODS_SELECTED  )
	{
		if ( RC.left != 0 )
		{
			pDC->FillSolidRect(&RC , m_clrBkgnd );
			pDC->SetTextColor(m_clrNormalText); 
		}
		else
        {
			pDC->FillSolidRect(&RC , m_clrHilight );
			pDC->SetTextColor(m_clrHilightText); 	
        } 
	}
	else
    {
		pDC->FillSolidRect( &RC, m_clrBkgnd );
		pDC->SetTextColor( m_clrNormalText );	
    }
	
	if( iItemID >= 0 )
	{
		
		GetLBText( iItemID, strText );
		pDC->DrawText(strText, RC, DT_LEFT | DT_VCENTER | DT_SINGLELINE);
	}
}

void CJMComboBox::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct) 
{
	if( lpMeasureItemStruct->itemID != unsigned( -1 ) )
	{	
		lpMeasureItemStruct->itemHeight = 16;
		lpMeasureItemStruct->itemWidth = 100;
	}
}

int CJMComboBox::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	lpCreateStruct->style  = m_dwStyle;  
	if (CComboBox::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	// TODO: Add your specialized creation code here
	
	return 0;
}

void CJMComboBox::OnDestroy() 
{
	CComboBox::OnDestroy();
	
	// TODO: Add your message handler code here
	
}

void CJMComboBox::OnSysColorChange() 
{
	CComboBox::OnSysColorChange();
	
	/*m_clrHilight = ::GetSysColor(COLOR_BTNHIGHLIGHT);
	m_clrShadow	= ::GetSysColor(COLOR_BTNSHADOW);
	m_clrNormal	= ::GetSysColor(COLOR_BTNFACE);*/
	
}