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CLEDScreen class - LED digital screen with transparency

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4.17/5 (8 votes)
25 Jan 20052 min read 83.8K   4.3K   63  
A CStatic derived digital LED screen with transparency. Based on "CStaticTime class" of Jason Hattingh.
 
// StaticCounter.cpp : implementation file
//

#include "stdafx.h"
#include "LEDScreen.h"

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

/////////////////////////////////////////////////////////////////////////////
// CLEDScreen

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// Function Header
CLEDScreen::CLEDScreen():m_SymbolRect(0,0,0,0),m_MatrixRect(0,0,0,0)
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
{
	symbDC = NULL;
	backDC = NULL;

	m_recClient.left  = 0;
	m_recClient.right = 0;

	m_Space = 0;
	m_Offset = 0;
	m_NotchWidth  = 0;
	m_NotchLength = 0;

	// Set default background
	m_crBackground = RGB(255,0,255);	//::GetSysColor(COLOR_BTNFACE);
	m_brBackground.CreateSolidBrush(m_crBackground);

	// Set default foreground
	m_crForeground = 0x0000FF00;	//::GetSysColor(COLOR_BTNFACE);
	m_brForeground.CreateSolidBrush(m_crForeground);

	m_content = _T("");

	m_bSpecifiedFadeColour = false;
	m_bDrawFadedNotches = true;
	m_bGotMetrics = false;
	m_bDrawTransparent = false;
}


CLEDScreen::~CLEDScreen()
{
	if(symbDC) delete symbDC;
	if(backDC) delete backDC;
}


void CLEDScreen::SetColourBackGround(COLORREF cr)
{
	// Set new background color
	if (cr != 0xffffffff)
		m_crBackground = cr;
	else // Set default background color
		m_crBackground = ::GetSysColor(COLOR_BTNFACE);

	//backDC->m_crBackground = m_crBackground;

	m_brBackground.DeleteObject();
    m_brBackground.CreateSolidBrush(m_crBackground);

	Update();
}


void CLEDScreen::SetColourForeGround(COLORREF cr)
{
	// Set new foreground color
	if (cr != 0xffffffff)
		m_crForeground = cr;
	else // Set default foreground color
		m_crForeground = ::GetSysColor(COLOR_BTNTEXT);

	Update();
}


void CLEDScreen::SetColourFaded(COLORREF cr)
{
	m_bSpecifiedFadeColour = true;
	m_crDimForeground = cr;
	Update();
}


BEGIN_MESSAGE_MAP(CLEDScreen, CStatic)
	//{{AFX_MSG_MAP(CLEDScreen)
	ON_WM_CTLCOLOR_REFLECT()
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


HBRUSH CLEDScreen::CtlColor(CDC* pDC, UINT nCtlColor) 
{
	pDC->SetTextColor(m_crForeground);
	pDC->SetBkColor(m_crBackground);
	
    return (HBRUSH)m_brBackground;	// Return non-NULL brush - the parent's handler is not called
}


void CLEDScreen::OnPaint() 
{
	GetClientRect(&m_recClient);

	CPaintDC dc(this);

	if (!backDC) backDC = new CMemDC(&dc, m_recClient);
	backDC->m_crBackground     = m_crBackground;
	backDC->m_bDrawTransparent = m_bDrawTransparent;

	CRect clip;
	backDC->GetClipBox(&clip);

	backDC->FillSolidRect(&m_recClient, m_crBackground);

	int nColPos = 0;
	m_Capacity = 0;
	int nSpaceCount = 0;
	
	if(m_SymbolRect.right > 0)  // if matrix is created
	{
		m_Capacity = (m_recClient.right - m_recClient.left - 2 * m_FieldsWidth + m_Offset) / (m_SymbolRect.right + m_Offset);
		nSpaceCount = m_Capacity - m_content.GetLength();
	}

	for (int nCount = 0; nCount < m_Capacity && symbDC != NULL; nCount++)
	{
		nColPos = m_FieldsWidth + nCount * (m_SymbolRect.right + m_Offset);

		// draw symbols (or draw back faded symbol) to buffer
		if (nCount < m_content.GetLength())
		{
			if		( m_content[nCount] == '0' )    DrawSymbol( backDC, ss_0, nColPos );
			else if ( m_content[nCount] == '1' )	DrawSymbol( backDC, ss_1, nColPos );
			else if ( m_content[nCount] == '2' )	DrawSymbol( backDC, ss_2, nColPos );
			else if ( m_content[nCount] == '3' )	DrawSymbol( backDC, ss_3, nColPos );
			else if ( m_content[nCount] == '4' )	DrawSymbol( backDC, ss_4, nColPos );
			else if ( m_content[nCount] == '5' )	DrawSymbol( backDC, ss_5, nColPos );
			else if ( m_content[nCount] == '6' )	DrawSymbol( backDC, ss_6, nColPos );
			else if ( m_content[nCount] == '7' )	DrawSymbol( backDC, ss_7, nColPos );
			else if ( m_content[nCount] == '8' )	DrawSymbol( backDC, ss_8, nColPos );
			else if ( m_content[nCount] == '9' )	DrawSymbol( backDC, ss_9, nColPos );
			else if ( m_content[nCount] == '#' )	DrawSymbol( backDC, ss_Sharp, nColPos );
			else if ( m_content[nCount] == '*' )	DrawSymbol( backDC, ss_Star, nColPos );
		}
		else DrawSymbol( backDC, ss_Space, nColPos );
	}

	if(backDC) 
		backDC->PaintTo(&dc, m_recClient);
 }


void CLEDScreen::DrawSymbol(CMemDC* pDC, TScreenSymbol aSymb, int nCol)
{
	ASSERT(pDC);
	CRect srcRect;
	GetMatrixSymbolRect(&srcRect, aSymb);
	pDC->BitBlt(nCol, m_FieldsWidth, srcRect.Width(), srcRect.Height(),
				symbDC, srcRect.left, srcRect.top, SRCCOPY);
}


void CLEDScreen::SetDrawFaded(bool bState)
{
	m_bDrawFadedNotches = bState;
}


void CLEDScreen::SetDrawTransparent(bool bState)
{
	m_bDrawTransparent = bState;
}


void CLEDScreen::Update()
{
	if (::IsWindow(m_hWnd))
	{
	    CWnd* pParent = GetParent();
	    CRect p_rect;
    
	    GetWindowRect(p_rect);
		pParent->ScreenToClient(p_rect);
		pParent->InvalidateRect(p_rect, TRUE);    
		Invalidate(FALSE);	
	}
}


void CLEDScreen::DisplayCurrentTime( CString strFormat )
{
	CTime tCurrent = CTime::GetCurrentTime();
	m_content = tCurrent.Format(strFormat);
	Update();
}


void CLEDScreen::Backspace()
{
	m_content.Delete(m_content.GetLength()-1,1);
	int ChangedPos = m_content.GetLength();
	UpdatePos(ChangedPos);
}


void CLEDScreen::Clear()
{
	int ChangedCount = m_content.GetLength();
	m_content = _T("");
	UpdatePos(0, ChangedCount);
}


void CLEDScreen::Append(CString value)
{
//	if (m_content.GetLength() >= m_Capacity) return;  //optional limitation
	m_content += value;
	int ChangedPos = m_content.GetLength() - 1;
	UpdatePos(ChangedPos);
}


BOOL CLEDScreen::IsEmpty()
{
	return m_content.IsEmpty();
}


int CLEDScreen::Count()
{
	return m_content.GetLength();
}


void CLEDScreen::SetSymbolParams(int aFieldsWidth, int nWidth, int sSpace, int sOffset)
{
	this->GetClientRect(&m_recClient);
	m_SymbolRect.left = 0;
	m_SymbolRect.top = 0;
	m_SymbolRect.bottom = m_recClient.bottom - m_recClient.top - 2 * aFieldsWidth;
	m_FieldsWidth = aFieldsWidth;
	m_Space = sSpace;
	m_Offset = sOffset;
	m_NotchWidth  = nWidth;
	m_NotchLength = (m_SymbolRect.bottom -  3 * nWidth - 4 * m_Space) / 2;
	m_SymbolRect.right  = m_NotchLength + 2 * (m_NotchWidth + m_Space);
	m_SymbolRect.bottom = 2 * m_SymbolRect.right - m_NotchWidth;


	if (m_SymbolRect.right < 0)
	{
		m_SymbolRect.right  = 0;
		m_SymbolRect.bottom = 0;
	}

	if (m_SymbolRect.right > 0)
	{
		m_MatrixRect.left = 0;
		m_MatrixRect.top = 0;
		m_MatrixRect.bottom = m_SymbolRect.bottom;
		m_MatrixRect.right  = m_SymbolRect.right * MATRIX_CAPACITY;
		CPaintDC dc(this);
		if (backDC) delete backDC; 
		backDC = new CMemDC(&dc, m_recClient);
		if (symbDC) delete symbDC; 
		symbDC = new CMemDC(&dc, m_MatrixRect);
		RebuildStorage();
	}
}

void CLEDScreen::RebuildStorage()
{
	ASSERT(backDC);
	ASSERT(symbDC);

	symbDC->FillSolidRect(&m_MatrixRect, m_crBackground);

	if(m_bDrawFadedNotches)
		for (int i = 0; i < MATRIX_CAPACITY; ++i)
		{
			BuildMatrixSymbol(symbDC, i, ScreenSymbols[ss_8], m_crDimForeground);
		}

	for (int i = 0; i < SYMBOLS_COUNT; ++i)
	{
		BuildMatrixSymbol(symbDC, i, ScreenSymbols[i], m_crForeground);
	}
}


void CLEDScreen::BuildMatrixSymbol(CDC* dstDC, int aPos, int aSymbol, COLORREF crNotchColor)
{
	int x0 = aPos * m_SymbolRect.right;
    int XX, YY;
	//	CPen pen(PS_SOLID | PS_ENDCAP_ROUND, m_NotchWidth, crNotchColor);
	LOGBRUSH logBrush;
	logBrush.lbStyle = BS_SOLID;
	logBrush.lbColor = crNotchColor;
	CPen pen(PS_SOLID | PS_GEOMETRIC | PS_ENDCAP_ROUND , m_NotchWidth, &logBrush);
	CPen* pOldPen = dstDC->SelectObject(&pen);


	if ( aSymbol & NOTCH_01)	{	
		XX = x0 + m_NotchWidth + m_Space;
		YY = m_NotchWidth / 2;
		dstDC->MoveTo( XX, YY);
		XX += (m_NotchLength - 1);
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_02)	{	
		XX = x0 + 1.5 * m_NotchWidth + m_NotchLength + 2 * m_Space;
		YY = m_NotchWidth + m_Space;
		dstDC->MoveTo( XX, YY);
		YY += (m_NotchLength - 1);
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_03)	{	
		XX = x0 + 1.5 * m_NotchWidth + m_NotchLength + 2 * m_Space;
		YY = 2 * m_NotchWidth + m_NotchLength + 3 * m_Space;
		dstDC->MoveTo( XX, YY);
		YY += (m_NotchLength - 1);
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_04)	{	
		XX = x0 + m_NotchWidth + m_Space;
		YY = 2.5 * m_NotchWidth + 2 * m_NotchLength + 4 * m_Space;
		dstDC->MoveTo( XX, YY);
		XX += (m_NotchLength - 1);
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_05)	{	
		XX = x0 + m_NotchWidth / 2;
		YY = 2 * m_NotchWidth + m_NotchLength + 3 * m_Space;
		dstDC->MoveTo( XX, YY);
		YY += (m_NotchLength - 1);
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_06)	{	
		XX = x0 + m_NotchWidth / 2;
		YY = m_NotchWidth + m_Space;
		dstDC->MoveTo( XX, YY);
		YY += (m_NotchLength - 1);
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_07)	{
		XX = x0 + m_NotchWidth + m_Space;
		YY = 1.5 * m_NotchWidth + m_NotchLength + 2 * m_Space;
		dstDC->MoveTo( XX, YY);
		XX += (m_NotchLength - 1);
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_08)	{
		XX = x0 + m_NotchWidth + m_Space;
		YY = m_NotchLength + m_Space;
		dstDC->MoveTo( XX, YY);
		XX = x0 + m_SymbolRect.right - m_NotchWidth - m_Space;
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_09)	{
		XX = x0 + m_NotchWidth + m_Space;
		YY = m_SymbolRect.bottom - m_NotchLength - m_Space;
		dstDC->MoveTo( XX, YY);
//		XX += (m_NotchLength - 1);
		XX = x0 + m_SymbolRect.right - m_NotchWidth - m_Space;
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_10)	{
		XX = x0 + 2 * m_NotchWidth;
//		XX = x0 + 1.5 * m_NotchWidth + m_Space;
//		XX = x0 + m_NotchWidth + m_Space;
//		XX = x0 + 0.6 * m_NotchLength;
//		YY = 1.5 * m_NotchWidth + m_Space;
		YY = 0.6 * m_NotchLength;
		dstDC->MoveTo( XX, YY);
//		YY = m_SymbolRect.bottom - 1.5 * m_NotchWidth - m_Space;
//		YY = m_SymbolRect.bottom - 0.6 * m_NotchLength;
		YY = m_SymbolRect.bottom - YY;
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_11)	{
		//XX = x0 + 2 * m_NotchWidth;
		XX = x0 + m_SymbolRect.right - 2 * m_NotchWidth;
		YY = 0.6 * m_NotchLength;
//		YY = 1.5 * m_NotchWidth + m_Space;
		dstDC->MoveTo( XX, YY);
//		YY = m_SymbolRect.bottom - 1.5 * m_NotchWidth - m_Space;
//		YY = m_SymbolRect.bottom - 0.6 * m_NotchLength;
		YY = m_SymbolRect.bottom - YY;
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_12)	{
		XX = x0 + m_NotchWidth + m_Space;
		YY = 1.5 * m_NotchWidth + m_NotchLength + 2 * m_Space;
		dstDC->MoveTo( XX, YY);
		XX += (m_NotchLength - 1);
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_13)	{
		XX = x0 + 1.3 * m_NotchWidth;
		YY = m_SymbolRect.bottom / 4 + m_NotchWidth ;
		dstDC->MoveTo( XX, YY);
		XX = x0 + m_SymbolRect.right - 1.3 * m_NotchWidth;
//		YY = m_SymbolRect.bottom - m_SymbolRect.bottom / 4 - 0.5 * m_NotchWidth;
		YY = m_SymbolRect.bottom - YY;
		dstDC->LineTo( XX, YY);
	}
	if ( aSymbol & NOTCH_14)	{
		XX = x0 + m_SymbolRect.right - 1.3 * m_NotchWidth;
		YY = m_SymbolRect.bottom / 4 + m_NotchWidth ;
		dstDC->MoveTo( XX, YY);
		XX = x0 + 1.3 * m_NotchWidth;
//		YY = m_SymbolRect.bottom - m_SymbolRect.bottom / 4 - 0.5 * m_NotchWidth;
		YY = m_SymbolRect.bottom - YY;
		dstDC->LineTo( XX, YY);
	}

	dstDC->SelectObject(pOldPen);
}


void CLEDScreen::GetMatrixSymbolRect(CRect* msRect, TScreenSymbol aSymb)
{
	msRect->left   = aSymb * m_SymbolRect.right;
	msRect->right  = msRect->left + m_SymbolRect.right;
	msRect->top    = m_MatrixRect.top;
	msRect->bottom = m_MatrixRect.bottom;
}

void CLEDScreen::GetWinPosRect(CRect* msRect, int aPos, int aCount)
{
    if (aCount <= 0) aCount = 1;
	msRect->left   = m_FieldsWidth + aPos * (m_SymbolRect.right + m_Offset);
	msRect->right  = msRect->left + aCount * (m_SymbolRect.right + m_Offset);
	msRect->top    = m_FieldsWidth;
	msRect->bottom = msRect->top + m_SymbolRect.bottom;
}

void CLEDScreen::UpdatePos(int aPos, int aCount)
{
	if (::IsWindow(m_hWnd))
	{
	    CWnd* pParent = GetParent();
		CRect srcRect;
		GetWinPosRect(&srcRect, aPos, aCount);
		ClientToScreen(srcRect);
		pParent->ScreenToClient(srcRect);
		pParent->InvalidateRect(srcRect, TRUE);    
		Invalidate(FALSE);	
	}
}

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Written By
olden69
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Posted 12 Jan 2005

Article Copyright 2005 by olden69
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