label.cpp

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// 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

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

/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.2
//
// From now on I'll try to keep a log of fixes and enhancements...
// 
// The new feature were added due to the response of people.
// All I ask is to all you programmers out there, is if you add, fix or
// enhance this code, sent me a copy and I'll send the copy on to www.codeproject.com
//
// Happy Software Engineer :)
// 
// New features include:
//
// A. Support for 3D Fonts
// B. Support for background transparency
// C. More comments provided
// D. If alignment is 'centered' and the window text is seperated by '\r\n'
//	  the will be centered accordingly - requested by someone @ nasa ;)
// E. Support for font rotation.
// F. Respond to System Color Change
// G. OnPaint improved performance - using Double Buffering Technique
//
// Thanks to:
// Mark McDowell	- For suggestion on 'Increasing the flexibility of "hypertext" setting...'
// Erich Ruth		- For suggestion on 'Font Rotation'
//

/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.3
//
// A. Added SS_LEFTNOWORDWRAP to include wordwrap
// B. Fix repainting problem 
// C. Fix SetBkColor
// D. Added SS_CENTER

// Thanks to:
// Marius						- Added styling problem.
// Azing Vondeling & Broker		- Spotting painting Problem.
// Mel Stober					- Back Color & SS_CENTER
// 
/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.4
//
// A. Fix to transparency mode
// B. Added new SetText3DHiliteColor to change the 3D Font face color - default is white.
// 
// Thanks to:
// michael.groeger				- Spotting Transparency with other controls bug.
//
//
/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.5
//
// A. Sanity handle check
// B. Support Interface Charset
// C. Check compilition with _UNICODE
// D. Fix hyperlink feature
// E. Support default Dialog Font
// F. Inclusion of SS_OWNERDRAW via control creation and subclassing
// G. Modification to Text aligmnent code
// H. New background gradient fill function
// 
// Thanks to:
// Steve Kowald				- Using null handles 
// Alan Chan				- Supporting International Windows
// Dieter Fauth				- Request for default Dialog font
// Herb Illfelder			- Text Alignment code
// 
/////////////////////////////////////////////////////////////////////////////
// CLabel Version 1.6
// Jeroen Roosendaal		- SetFont suggestion
// Laurent					- Spotting SelectObject bugs
// Bernie					- Fix PreCreateWindow bug
// Jignesh I. Patel			- Added expanded tabs feature
// Jim Farmelant 			- Fix SetText crash


//////////////////////////////////////////////////////////////////////////
//
// Function:		CLabel::CLabel
//
// Description:		Default contructor
//
// INPUTS:          
// 
// RETURNS:         
//
// NOTES:			
// 
// MODIFICATIONS:
//
// Name                     Date        Version Comments
// NT ALMOND				26/08/98    1.0     Origin
//
//////////////////////////////////////////////////////////////////////////
CLabel::CLabel()
{

	m_crText = GetSysColor(COLOR_WINDOWTEXT);

// 1.1
	m_hBackBrush = NULL;


	m_crHiColor =		0;
	m_crLoColor	=		0;

	m_bTimer =			FALSE;
	m_bState =			FALSE;
	m_bTransparent =	FALSE;
	m_Link =			LinkNone;
	m_hCursor =			NULL;
	m_Type =			None;
	m_bFont3d =			FALSE;
	m_bNotifyParent =	FALSE;
	m_bToolTips =		FALSE;
	m_bRotation =		FALSE;
	m_fillmode =		Normal;
	m_cr3DHiliteColor =	RGB(255,255,255);
	
	m_hwndBrush = ::CreateSolidBrush(GetSysColor(COLOR_3DFACE));
}

//////////////////////////////////////////////////////////////////////////
//
// Function:		CLabel::~CLabel
//
// Description:		
//
// INPUTS:          
// 
// RETURNS:         
//
// NOTES:			
// 
// MODIFICATIONS:
//
// Name                     Date        Version Comments
// NT ALMOND				26/08/98    1.0     Origin
// NT ALMOND				15092000	1.5		Handle Check
//////////////////////////////////////////////////////////////////////////
CLabel::~CLabel()
{
	// Clean up
	m_font.DeleteObject();
	::DeleteObject(m_hwndBrush);

	// Stop Checking complaining
	if (m_hBackBrush)
		::DeleteObject(m_hBackBrush);
	
}

void CLabel::UpdateSurface()
{
	CRect (rc);
	GetWindowRect(rc);
	RedrawWindow();

	GetParent()->ScreenToClient(rc);
	GetParent()->InvalidateRect(rc,TRUE);
	GetParent()->UpdateWindow();
}

//////////////////////////////////////////////////////////////////////////
//
// Function:		CLabel::ReconstructFont
//
// Description:		Helper function to build font after it was changed
//
// INPUTS:          
// 
// RETURNS:         
//
// NOTES:			PROTECTED
// 
// MODIFICATIONS:
//
// Name                     Date        Version Comments
// NT ALMOND				26/08/98    1.0     Origin
//
//////////////////////////////////////////////////////////////////////////
void CLabel::ReconstructFont()
{
	m_font.DeleteObject();
	BOOL bCreated = m_font.CreateFontIndirect(&m_lf);

	ASSERT(bCreated);
}

//////////////////////////////////////////////////////////////////////////
//
// Function:		CLabel::OnPaint
//
// Description:		Handles all the drawing code for the label
//
// INPUTS:          
// 
// RETURNS:         
//
// NOTES:			Called by Windows... not by USER
//					Probably needs tiding up a some point.
//					Different states will require this code to be reworked.
//
// 
// MODIFICATIONS:
//
// Name                     Date        Version Comments
// NT ALMOND				22/10/98    1.0     Origin
// NT ALMOND				15092000	1.5		Handle Check
// NT ALMOND				15092000	1.5		Alignment mods
// NT ALMOND				15092000	1.5		Gradient Fill Mode
// NT ALMOND				02072002	1.6		Fill SelectObject bugs
// NT ALMOND				02072002	1.6		Added to expand tabs
//////////////////////////////////////////////////////////////////////////

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;
	CBitmap*	pOldBitmap = NULL;

	if (!m_bTransparent)
	{
		pDCMem = new CDC;
		pDCMem->CreateCompatibleDC(&dc);
		bmp.CreateCompatibleBitmap(&dc,rc.Width(),rc.Height());
		pOldBitmap = 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)
	{
		if (m_fillmode == Normal)
		{
			CBrush br;
			
			if (m_hBackBrush != NULL)
				br.Attach(m_hBackBrush);
			else
				br.Attach(m_hwndBrush);
					
			pDCMem->FillRect(rc,&br);

			br.Detach();
		}
		else // Gradient Fill
		{
			DrawGradientFill(pDCMem, &rc, m_crLoColor, m_crHiColor, 100);
		}

	}
	

	// If the text is flashing turn the text color on
	// then to the color of the window background.

	LOGBRUSH lb;
	ZeroMemory(&lb,sizeof(lb));

	// Stop Checking complaining
	if (m_hBackBrush)
		::GetObject(m_hBackBrush,sizeof(lb),&lb);


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

	DWORD style = GetStyle();
	
	switch (style & SS_TYPEMASK)
	{
		case SS_RIGHT: 
			dwFlags = DT_RIGHT | DT_WORDBREAK; 
			break; 
		
		case SS_CENTER: 
			dwFlags = SS_CENTER | DT_WORDBREAK;
			break;

		case SS_LEFTNOWORDWRAP: 
			dwFlags = DT_LEFT; 
			break;

		default: // treat other types as left
			case SS_LEFT: 
				dwFlags = DT_LEFT | DT_WORDBREAK; 
				break;
	}	

		
	// Added to expand tabs...
	if(strText.Find(_T('\t')) != -1)
		dwFlags |= DT_EXPANDTABS;

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

		// Apply 
		if (strText.Find(_T("\r\n")) == -1)
		{
			dwFlags |= DT_VCENTER;

			// And because DT_VCENTER only works with single lines
			dwFlags |= DT_SINGLELINE; 
		}

	}

	//
	// 3333   DDDDD
	//     3  D    D
	//   33   D     D    E F X 
	//     3  D    D
	// 3333   DDDDD
	//
	//
	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);
			m_3dType;

		}
	}

	// 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);
		// continue DC restore 
		pDCMem->SelectObject ( pOldBitmap ) ;
		delete pDCMem;
	}
}


//////////////////////////////////////////////////////////////////////////
//
// Function:		CLabel::OnTimer
//
// Description:		Used in conjunction with 'FLASH' functions
//
// INPUTS:          Windows API
// 
// RETURNS:         Windows API
//
// NOTES:			
// 
// MODIFICATIONS:
//
// Name                     Date        Version Comments
// NT ALMOND				26/08/98    1.0     Origin
//
//////////////////////////////////////////////////////////////////////////
void CLabel::OnTimer(UINT nIDEvent) 
{

	m_bState = !m_bState;

	UpdateSurface();
	
	CStatic::OnTimer(nIDEvent);
}

//////////////////////////////////////////////////////////////////////////
//
// Function:		CLabel::OnSetCursor
//
// Description:		Used in conjunction with 'LINK' function
//
// INPUTS:          Windows API
//