tabchecklistbox.cpp

TabBars的开源源码

// TabCheckListBox.cpp : implementation file
// 5/22/98 Modified
// by Qing Zhang ([e-mail])
// If you like this code, just don't remove my name from the source.
/*********************************
*	修改了DrawItem的部分代码，使文字在不同状态下显示不同颜色
*	添加了属性设置函数
*	modify by Simon ([e-mail])
*********************************/

#include "stdafx.h"
#include "TabCheckListBox.h"

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

/////////////////////////////////////////////////////////////////////////////
// CTabCheckListBox

CTabCheckListBox::CTabCheckListBox()
{
	m_lpnEachStop = NULL;
	m_clrChkText = RGB(0,0,255);
	m_clrText = RGB(136,0,136);
	m_clrDisableText = RGB(0x80, 0x80, 0x80);
}

CTabCheckListBox::~CTabCheckListBox()
{
	delete []m_lpnEachStop;
}


BEGIN_MESSAGE_MAP(CTabCheckListBox, CCheckListBox)
	//{{AFX_MSG_MAP(CTabCheckListBox)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTabCheckListBox message handlers

void CTabCheckListBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	// TODO: Add your code to draw the specified item
	ASSERT((GetStyle() & (LBS_OWNERDRAWFIXED | LBS_HASSTRINGS)) ==
		(LBS_OWNERDRAWFIXED | LBS_HASSTRINGS));

	CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);

	if (((LONG)(lpDrawItemStruct->itemID) >= 0) &&
		(lpDrawItemStruct->itemAction & (ODA_DRAWENTIRE | ODA_SELECT)))
	{
		int cyItem = GetItemHeight(lpDrawItemStruct->itemID);
		BOOL fDisabled = !IsWindowEnabled() || !IsEnabled(lpDrawItemStruct->itemID);
		BOOL bCheck = GetCheck(lpDrawItemStruct->itemID);
				
		COLORREF newTextColor = fDisabled ?	m_clrDisableText : (bCheck ? m_clrChkText : m_clrText);//GetSysColor(COLOR_WINDOWTEXT);  // light gray
		COLORREF oldTextColor = pDC->SetTextColor(newTextColor);

		COLORREF newBkColor = GetSysColor(COLOR_WINDOW);
		COLORREF oldBkColor = pDC->SetBkColor(newBkColor);

		if (newTextColor == newBkColor)
			newTextColor = RGB(0xC0, 0xC0, 0xC0);   // dark gray

		if (!fDisabled && ((lpDrawItemStruct->itemState & ODS_SELECTED) != 0))
		{
			pDC->SetTextColor(GetSysColor(COLOR_HIGHLIGHTTEXT));
			pDC->SetBkColor(GetSysColor(COLOR_HIGHLIGHT));
		}

		if (m_cyText == 0)
			VERIFY(cyItem >= CalcMinimumItemHeight());

		CString strText;
		GetText(lpDrawItemStruct->itemID, strText);

		pDC->ExtTextOut(lpDrawItemStruct->rcItem.left,
			lpDrawItemStruct->rcItem.top + max(0, (cyItem - m_cyText) / 2),
			ETO_OPAQUE, &(lpDrawItemStruct->rcItem), "", 0, NULL);
		pDC->TabbedTextOut(lpDrawItemStruct->rcItem.left,
			lpDrawItemStruct->rcItem.top + max(0, (cyItem - m_cyText) / 2),
			strText, strText.GetLength(), m_nTabStops, m_lpnEachStop, lpDrawItemStruct->rcItem.left);

		pDC->SetTextColor(oldTextColor);
		pDC->SetBkColor(oldBkColor);
	}

	if ((lpDrawItemStruct->itemAction & ODA_FOCUS) != 0)
		pDC->DrawFocusRect(&(lpDrawItemStruct->rcItem));
}

void CTabCheckListBox::SetTabStops()
{
	delete []m_lpnEachStop;
	m_lpnEachStop = new int[1];
	int nBaseUnit = GetAverageCharWidths();
	m_lpnEachStop[0] = nBaseUnit / 2;
	m_nTabStops = 1;
}


BOOL CTabCheckListBox::SetTabStops( const int& cxEachStop )
{
	if(cxEachStop < 0)
		return FALSE;
	delete []m_lpnEachStop;
	m_lpnEachStop = new int[1];
	int nBaseUnit = GetAverageCharWidths();
	m_lpnEachStop[0] = (cxEachStop * nBaseUnit) / 4;
	m_nTabStops = 1;
	return TRUE;
}

BOOL CTabCheckListBox::SetTabStops( int nTabStops, LPINT rgTabStops )
{
	delete []m_lpnEachStop;
	int nStop = 0;
	m_nTabStops = nTabStops;
	m_lpnEachStop = new int[nTabStops];
//	int nBaseUnit = GetAverageCharWidths();
	int nPrevStop = 0;
	for(int i = 0; i < nTabStops; i++)
	{
		nStop = rgTabStops[i];//(rgTabStops[i] * nBaseUnit) / 4;
		if(nStop > nPrevStop)
		{
			m_lpnEachStop[i] = nStop;
			nPrevStop = nStop;
		}
		else
			return FALSE;
	}
	return TRUE;
}

int CTabCheckListBox::GetAverageCharWidths()
{
/*
	CFont* pFont = GetFont();
	LOGFONT lf;
	pFont->GetLogFont(&lf);
	int nBaseUnit = lf.lfWidth;
	if(nBaseUnit == 0)
*/
	int nBaseUnit = LOWORD(GetDialogBaseUnits());	
	return nBaseUnit;
}