// ODrawCombo.cpp : implementation file
//
 
#include "stdafx.h"
#include "mybox.h"
 
// CMyBox
 
IMPLEMENT_DYNAMIC(CMyBox, CComboBox)
CMyBox::CMyBox()
{
}
 
CMyBox::~CMyBox()
{
}
 
BEGIN_MESSAGE_MAP(CMyBox, CComboBox)
END_MESSAGE_MAP()
 
// CMyBox message handlers
 
void CMyBox::Init()
{
}
 
void CMyBox::AddItem(CString nItem)
{
	this->AddString(nItem);
}
 
void CMyBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
	 ASSERT(lpDrawItemStruct->CtlType == ODT_COMBOBOX);
	 if(lpDrawItemStruct->itemID != 0xffffffff)
	 {
        // 1 - Get combobox item ID
		UINT id = (UINT) (WORD) lpDrawItemStruct->itemID;
 
		// Consistency checks
		ASSERT(id == lpDrawItemStruct->itemID);
 
		// 2 - Get device context & item rectangle
		CDC dc;
		dc.Attach(lpDrawItemStruct->hDC);
 
		CRect rcItem = lpDrawItemStruct->rcItem;
		int nCurrentX = rcItem.left;
 
		// 3 - Select background and foreground
		// colors depending on item selected state
		COLORREF crBack, crFore;
		if(lpDrawItemStruct->itemState & ODS_SELECTED)
		{
			crBack = ::GetSysColor(COLOR_HIGHLIGHT);
			crFore = ::GetSysColor(COLOR_HIGHLIGHTTEXT);
		}
		else
		{
			crBack = ::GetSysColor(COLOR_WINDOW);
			crFore = ::GetSysColor(COLOR_WINDOWTEXT);
		}
 
		// 4 - Fill item background
		CRect rcBack(nCurrentX, rcItem.top, rcItem.right, rcItem.bottom);
		CBrush brFill(crBack);
		dc.FillRect(&rcBack, &brFill);
 
		// 5 - Draw item color rectangle
		CBrush brColor(::GetSysColor(COLOR_WINDOWTEXT));
		CBrush* pOldBrush = dc.SelectObject(&brColor);
		CRect rcColor(nCurrentX, rcItem.top, nCurrentX, rcItem.bottom);
		dc.Rectangle(rcColor);
		dc.SelectObject(pOldBrush);
 
        // 6 - Draw item text
		COLORREF crOldTextColor = dc.SetTextColor(crFore);
		int nOldBkMode = dc.SetBkMode(TRANSPARENT);
		CString str;
		this->GetLBText(id, str);
		dc.DrawText(str, -1, rcItem, DT_LEFT|DT_WORDBREAK);
		dc.SetTextColor(crOldTextColor);
		dc.SetBkMode(nOldBkMode);
		dc.Detach();
	}
}
 
void CMyBox::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
	/*DWORD dwStyle = ::GetWindowLong( m_hWnd, GWL_STYLE );*/
	/*ASSERT( dwStyle & CBS_DROPDOWNLIST );*/
 
	CFont* pFont = GetFont();
	CFont* pOldFont = 0;
	CString str;
	CDC* pDC = GetDC();
	pOldFont = pDC->SelectObject(pFont);
 
	// Get text from combo box
	this->GetLBText(lpMeasureItemStruct->itemID, str);
 
	// Obtain rectangle that text is originally in
	CRect rc;
	GetClientRect(&rc);
	//GetWindowRect(&rc);
	rc.left = 0;
	rc.top = 0;
	rc.bottom = 0;
 
	// With the inclusion of DT_CALCRECT
	// this DrawText does not draw the text
	// it just measures the rectangle
	pDC->DrawText(str, str.GetLength(), &rc, DT_CALCRECT|DT_LEFT|DT_WORDBREAK);
	lpMeasureItemStruct->itemHeight = rc.bottom;
	pDC->SelectObject(pOldFont);
	ReleaseDC(pDC);
}