memo.cpp

BREW 应用

// MEMO.cpp: implementation of the CMEMO class.
//
//////////////////////////////////////////////////////////////////////

#include "MEMO.h"

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

CMEMO::CMEMO(CAppMainHandler *pAppMain)
{
	AEEDeviceInfo di;
	m_pAppMain = pAppMain;

	ISHELL_GetDeviceInfo(m_pAppMain->m_pIShell, &di);
	m_Mi.m_nx = m_Mi.m_ny = 0;
	m_Mi.m_nWidth = di.cxScreen;
	m_Mi.m_nHeight = di.cyScreen;

	AEEFont font;
	int pnAscent, pnDescent;
	int m_nFontHeight = IDISPLAY_GetFontMetrics (m_pAppMain->m_pIDisplay, font, &pnAscent, &pnDescent);
	m_Mi.m_nLineCount = m_Mi.m_nHeight / (m_nFontHeight + 4);
	
	for( int i=0; i< m_Mi.m_nLineCount; i++ )
		m_Mti.m_pLineText[i] = (char*)new char[30];
	m_Mti.m_nStartLine = 0;
	m_Mti.m_pMemoText = NULL;
	m_ptxtFile = NULL;
}

CMEMO::~CMEMO()
{

}

void CMEMO::Size(int x, int y, int width, int height)
{
	m_Mi.m_nx = x;
	m_Mi.m_ny = y;
	m_Mi.m_nWidth = width;
	m_Mi.m_nHeight = height;

	m_Mi.m_nLineCount = m_Mi.m_nHeight / (m_nFontHeight + 4);
}

int CMEMO::LoadFromFile(char *szFile)
{
	if( m_ptagFile )
		m_ptagFile->Close();

	m_ptagFile = new CTAGTEXTFILE(m_pAppMain, m_Mi.m_nWidth);
	m_ptagFile->Open(szFile);
	InitTextLine();
	return 0;
}

void CMEMO::InitTextLine()
{
	m_ptagFile->InitText();
	for( int i=0; i < m_Mi.m_nLineCount-1; i++ ) {
		m_Mti.m_pLineText[i] = m_ptagFile->Read(true);
	}
	DrawLine();
}

bool CMEMO::Next()
{
	m_Mti.m_nStartLine++;
	if( m_Mti.m_nStartLine > m_Mi.m_nLineCount-1)
		m_Mti.m_nStartLine = 0;
	MakeTextLine(true);
	DrawLine();
	return true;
}

bool CMEMO::Prev()
{
	m_Mti.m_nStartLine--;
	if( m_Mti.m_nStartLine < 0 )
		m_Mti.m_nStartLine = m_Mi.m_nLineCount - 1;
	MakeTextLine(false);
	DrawLine();
	return true;
}

void CMEMO::MakeTextLine(bool bNext)
{
	int nIdx;

	nIdx = m_Mti.m_nStartLine - 1;
	if( nIdx < 0 ) 
		nIdx = m_Mi.m_nLineCount - 1;
	m_Mti.m_pLineText[nIdx] = m_ptagFile->Read(bNext);
}

void CMEMO::DrawLine()
{
	int nCount, nIdx;
	nCount = nIdx = 0;
	nIdx = m_Mti.m_nStartLine;

	while( true ) {
		if( nIdx > m_Mi.m_nLineCount-1 )
			nIdx = 0;
		Draw(m_Mti.m_pLineText[nIdx], nCount);
		nCount++;
		if( nCount == m_Mi.m_nLineCount )
			break;
	}
}

void CMEMO::Draw(char *pLine, int nY)
{
	IDISPLAY_ClearScreen(m_pAppMain->m_pIDisplay);  // Clear whole screen
	IDISPLAY_DrawText(m_pAppMain->m_pIDisplay, AEE_FONT_NORMAL, (AECHAR*)pLine, 
						-1, 0, nY*m_nFontHeight+2 , 0, IDF_ALIGN_CENTER | IDF_ALIGN_TOP);
	IDISPLAY_Update (m_pAppMain->m_pIDisplay);
}

void CMEMO::CloseFile()
{
	if( m_ptxtFile ) {
		m_ptxtFile->Close();
		delete m_ptxtFile;
		m_ptxtFile = NULL;
	}
}

int CMEMO::GetText(char *szOut)
{
	szOut = m_Mti.m_pMemoText;
	return m_Mti.m_nTextLength;
}

int CMEMO::SetText(char *szIn, int nSize)
{
	m_Mti.m_pMemoText = szIn;
	m_Mti.m_pCurrText = szIn;
	m_Mti.m_pEndText = &szIn[nSize-1];
	m_Mti.m_nTextLength = STRLEN(szIn);
	return m_Mti.m_nTextLength;
}

int CMEMO::GetLength()
{
	return m_Mti.m_nTextLength;
}