label.cpp

是当初的数据结构的做业,用的是b+树这一块,非常值得初学者的参考

// Label.cpp : implementation file
//

#include "stdafx.h"

#include "Label.h"

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

/////////////////////////////////////////////////////////////////////////////
// CLabel

CLabel::CLabel()
{
	m_crText = GetSysColor(COLOR_WINDOWTEXT);
	m_hBackBrush = NULL;
	::GetObject((HFONT)GetStockObject(DEFAULT_GUI_FONT),sizeof(m_lf),&m_lf);
	m_font.CreateFontIndirect(&m_lf);
	m_bTimer =			FALSE;
	m_bState =			FALSE;
	m_bTransparent =	FALSE;
	m_bLink =			TRUE;
	m_hCursor =			NULL;
	m_Type =			None;
	m_bFont3d =			FALSE;
	m_bNotifyParent =	FALSE;
	m_bToolTips =		FALSE;
	m_bRotation =		FALSE;
	m_cr3DHiliteColor =	RGB(255,255,255);	
	m_hwndBrush = ::CreateSolidBrush(GetSysColor(COLOR_3DFACE));
}

CLabel::~CLabel()
{
	// Clean up
	m_font.DeleteObject();
	::DeleteObject(m_hwndBrush);
	::DeleteObject(m_hBackBrush);	
}

BEGIN_MESSAGE_MAP(CLabel, CStatic)
	//{{AFX_MSG_MAP(CLabel)
	ON_WM_TIMER()
	ON_WM_LBUTTONDOWN()
	ON_WM_SETCURSOR()
	ON_WM_SYSCOLORCHANGE()
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CLabel message handlers

void CLabel::ReconstructFont()
{
	m_font.DeleteObject();
	BOOL bCreated = m_font.CreateFontIndirect(&m_lf);

	ASSERT(bCreated);
}

void CLabel::OnPaint() 
{
	CPaintDC dc(this); // device context for painting

	DWORD dwFlags = 0;

	CRect rc;
	GetClientRect(rc);
	CString strText;
	GetWindowText(strText);
	CBitmap bmp;

	// Set up for double buffering...
	CDC* pDCMem;

	if (!m_bTransparent)
	{
		pDCMem = new CDC;
		pDCMem->CreateCompatibleDC(&dc);
		bmp.CreateCompatibleBitmap(&dc,rc.Width(),rc.Height());
		pDCMem->SelectObject(&bmp);
	}
	else
	{
		pDCMem = &dc;
	}

	UINT nMode = pDCMem->SetBkMode(TRANSPARENT);

	COLORREF crText = pDCMem->SetTextColor(m_crText);
	CFont *pOldFont = pDCMem->SelectObject(&m_font);

	// Fill in backgound if not transparent
	if (!m_bTransparent)
	{
		CBrush br;
		
		if (m_bState && m_Type == Background)
		{
			if (m_hBackBrush != NULL)
				br.Attach(m_hBackBrush);
			else
				br.Attach(m_hwndBrush);
		}
		else
		{
			if (m_hBackBrush != NULL)
				br.Attach(m_hBackBrush);
			else
				br.Attach(m_hwndBrush);
		}
				
		pDCMem->FillRect(rc,&br);
		br.Detach();
	}
	
	// If the text is flashing turn the text color on
	// then to the color of the window background.

	LOGBRUSH lb;
	ZeroMemory(&lb,sizeof(lb));
	::GetObject(m_hBackBrush,sizeof(lb),&lb);

	// Something to do with flashing
	if (!m_bState && m_Type == Text)
		pDCMem->SetTextColor(lb.lbColor);

	if (!(GetStyle() & SS_LEFTNOWORDWRAP))
		dwFlags |= DT_WORDBREAK;

	if (GetStyle() & SS_LEFT)
		dwFlags = DT_LEFT;

	if (GetStyle() & SS_RIGHT)
		dwFlags = DT_RIGHT;

	if (GetStyle() & SS_CENTER)
		dwFlags = DT_CENTER;

	// If the text centered make an assumtion that
	// the will want to center verticly as well
	if (GetStyle() & SS_CENTERIMAGE)
	{
		dwFlags = DT_CENTER;

		// Apply 
		if (strText.Find("\r\n") == -1)
		{
			dwFlags |= DT_VCENTER;
			// And because DT_VCENTER only works with single lines
			dwFlags |= DT_SINGLELINE; 
		}
	}

	// 3D旋转效果
	if (m_bRotation)
	{
		int nAlign = pDCMem->SetTextAlign (TA_BASELINE);

		CPoint pt;
		GetViewportOrgEx (pDCMem->m_hDC,&pt) ;
		SetViewportOrgEx (pDCMem->m_hDC,rc.Width() / 2, rc.Height() / 2, NULL) ;
		pDCMem->TextOut (0, 0, strText) ;
		SetViewportOrgEx (pDCMem->m_hDC,pt.x / 2, pt.y / 2, NULL) ;
		pDCMem->SetTextAlign (nAlign);
	}
	else
	{
		pDCMem->DrawText(strText,rc,dwFlags);
		if (m_bFont3d)
		{
			pDCMem->SetTextColor(m_cr3DHiliteColor);

			if (m_3dType == Raised)
				rc.OffsetRect(-1,-1);
			else
				rc.OffsetRect(1,1);

			pDCMem->DrawText(strText,rc,dwFlags);
		}
	}

	// Restore DC's State
	pDCMem->SetBkMode(nMode);
	pDCMem->SelectObject(pOldFont);
	pDCMem->SetTextColor(crText);

	if (!m_bTransparent)
	{
		dc.BitBlt(0,0,rc.Width(),rc.Height(),pDCMem,0,0,SRCCOPY);
		delete pDCMem;
	}
}

void CLabel::OnTimer(UINT nIDEvent) 
{
	m_bState = !m_bState;

	InvalidateRect(NULL,TRUE);
	UpdateWindow();
	
	CStatic::OnTimer(nIDEvent);
}

BOOL CLabel::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{
	if (m_hCursor)
	{
		::SetCursor(m_hCursor);
		return TRUE;
	}
	return CStatic::OnSetCursor(pWnd, nHitTest, message);
}

void CLabel::OnLButtonDown(UINT nFlags, CPoint point) 
{
	if (m_bNotifyParent)
	{
		CString strLink;
		GetWindowText(strLink);
		ShellExecute(NULL,"open",strLink,NULL,NULL,SW_SHOWNORMAL);
	}
	else
	{
		// To use notification in parent window
		// Respond to a OnNotify in parent and disassemble the message
		//
		NMHDR nm;
		nm.hwndFrom = GetSafeHwnd();
		nm.idFrom  = GetDlgCtrlID();
		nm.code = NM_LINKCLICK;
		GetParent()->SendMessage(WM_NOTIFY,nm.idFrom,(LPARAM) &nm);
	}
		
	CStatic::OnLButtonDown(nFlags, point);
}

CLabel& CLabel::SetText(const CString& strText)
{
	SetWindowText(strText);
	Invalidate(FALSE);

	return *this;
}

CLabel& CLabel::SetTextColor(COLORREF crText)
{
	m_crText = crText;
	RedrawWindow();
	return *this;
}

CLabel& CLabel::SetFontBold(BOOL bBold)
{
	m_lf.lfWeight = bBold ? FW_BOLD : FW_NORMAL;
	ReconstructFont();
	RedrawWindow();
	return *this;
}

CLabel& CLabel::SetFontUnderline(BOOL bSet)
{	
	m_lf.lfUnderline = bSet;
	ReconstructFont();
	RedrawWindow();
	return *this;
}

CLabel& CLabel::SetFontItalic(BOOL bSet)
{
	m_lf.lfItalic = bSet;
	ReconstructFont();
	RedrawWindow();
	return *this;	
}

CLabel& CLabel::SetSunken(BOOL bSet)
{
	if (!bSet)
		ModifyStyleEx(WS_EX_STATICEDGE,0,SWP_DRAWFRAME);
	else
		ModifyStyleEx(0,WS_EX_STATICEDGE,SWP_DRAWFRAME);		
	return *this;	
}

CLabel& CLabel::SetBorder(BOOL bSet)
{
	if (!bSet)
		ModifyStyle(WS_BORDER,0,SWP_DRAWFRAME);
	else
		ModifyStyle(0,WS_BORDER,SWP_DRAWFRAME);		
	return *this;	
}

CLabel& CLabel::SetFontSize(int nSize)
{
	CFont cf;
	LOGFONT lf;

	cf.CreatePointFont(nSize * 10, m_lf.lfFaceName);
	cf.GetLogFont(&lf);
	m_lf.lfHeight = lf.lfHeight;
	m_lf.lfWidth  = lf.lfWidth;
	ReconstructFont();
	RedrawWindow();
	return *this;
}

CLabel& CLabel::SetBkColor(COLORREF crBkgnd)
{
	if (m_hBackBrush)
		::DeleteObject(m_hBackBrush);	
	m_hBackBrush = ::CreateSolidBrush(crBkgnd);
	Invalidate(FALSE);
	return *this;
}

CLabel& CLabel::SetFontName(const CString& strFont)
{	
	strcpy(m_lf.lfFaceName,strFont);
	ReconstructFont();
	RedrawWindow();
	return *this;
}

CLabel& CLabel::FlashText(BOOL bActivate)
{
	if (m_bTimer)
		KillTimer(1);

	if (bActivate)
	{
		m_bState = FALSE;		
		m_bTimer = TRUE;		
		SetTimer(1,500,NULL);
		m_Type = Text;
	}
	else
		m_Type = None;
	return *this;
}

CLabel& CLabel::FlashBackground(BOOL bActivate)
{
	if (m_bTimer)
		KillTimer(1);

	if (bActivate)
	{
		m_bState = FALSE;
		m_bTimer = TRUE;
		SetTimer(1,500,NULL);
		m_Type = Background;
	}
	return *this;
}

CLabel& CLabel::SetLink(BOOL bLink,BOOL bNotifyParent)
{

	m_bLink = bLink;
	m_bNotifyParent = bNotifyParent;

	if (bLink)
		ModifyStyle(0,SS_NOTIFY);
	else
		ModifyStyle(SS_NOTIFY,0);

	return *this;
}

CLabel& CLabel::SetLinkCursor(HCURSOR hCursor)
{

	m_hCursor = hCursor;
	return *this;
}

CLabel& CLabel::SetTransparent(BOOL bSet)
{

	m_bTransparent = bSet;
	ModifyStyleEx(0,WS_EX_TRANSPARENT);
	InvalidateRect(NULL,TRUE);
	UpdateWindow();
	return *this;
}

CLabel& CLabel::SetFont3D(BOOL bSet,Type3D type)
{
	m_bFont3d = bSet;
	m_3dType = type;
	RedrawWindow();
	return *this;
}

void CLabel::OnSysColorChange() 
{
	if (m_hwndBrush)
		::DeleteObject(m_hwndBrush);
	m_hwndBrush = ::CreateSolidBrush(GetSysColor(COLOR_3DFACE));	
	RedrawWindow();		
}

CLabel& CLabel::SetRotationAngle(UINT nAngle,BOOL bRotation)
{
	m_lf.lfEscapement = m_lf.lfOrientation = (nAngle * 10);
	m_bRotation = bRotation;	
	ReconstructFont();	
	RedrawWindow();
	return *this;
}

CLabel& CLabel::SetText3DHiliteColor(COLORREF cr3DHiliteColor)
{
	m_cr3DHiliteColor = cr3DHiliteColor;
	RedrawWindow();
	return *this;
}