mp3listbox.cpp

EVC环境下用SDK开发WINCE的应用程序

// Mp3ListBox.cpp: implementation of the CMp3ListBox class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "Mp3ListBox.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CMp3ListBox::CMp3ListBox()
{

}

CMp3ListBox::~CMp3ListBox()
{

}

void CMp3ListBox::OnDrawItem(int /*nIDCtl*/, LPDRAWITEMSTRUCT lpdis)
{
	const int MAX_TEXT_LENGTH = 255;
	TCHAR		tchBuffer[MAX_TEXT_LENGTH] = {0,};
	int			y;
	TEXTMETRIC	tm; 

	// Display the text associated with the item. 
	if(lpdis->itemID != -1 
		&& (GetItemData(lpdis->itemID) == LISTBOX_ITEM_IS_PLAYING
		|| (lpdis->itemState & ODS_SELECTED)) )
	{
		GetItemText(lpdis->itemID, tchBuffer, MAX_TEXT_LENGTH);
		
		GetTextMetrics(lpdis->hDC, &tm); 
		
		y = (lpdis->rcItem.bottom + lpdis->rcItem.top - 
			tm.tmHeight) / 2; 
		
		int nOldMode;
		COLORREF crOldTextColor, crOldBkColor;
		
		nOldMode		= ::SetBkMode(lpdis->hDC,TRANSPARENT);
		if( (lpdis->itemState & ODS_SELECTED) )
		{
			crOldTextColor	= ::SetTextColor(lpdis->hDC, MP3_LB_SELECTED_TXEXTCOLOR);
			crOldBkColor	= ::SetBkColor(lpdis->hDC, MP3_LB_SELECTED_BKCOLOR);
		} else
		{
			crOldTextColor	= ::SetTextColor(lpdis->hDC, MP3_LB_PLAYING_TXEXTCOLOR);
			crOldBkColor	= ::SetBkColor(lpdis->hDC, MP3_LB_PLAYING_BKCOLOR);
		}
		
		ExtTextOut(lpdis->hDC, 
			3, 
			y, 
			ETO_OPAQUE,
			&lpdis->rcItem,
			tchBuffer, 
			_tcslen(tchBuffer),
			NULL); 
		
		SetBkMode(lpdis->hDC,nOldMode);
		SetTextColor(lpdis->hDC, crOldTextColor);
		SetBkColor(lpdis->hDC, crOldBkColor);
	}
	else
	{
		CNListBox::OnDrawItem(0, lpdis);
	}
}