bool getTextExtentPoint(TUChar* pszText, int nLen, TSize& tSize)
{
bool bRet = false;
do
{
CC_BREAK_IF(! pszText);
if (tSize.Width() > 0 && tSize.Height() > 0)
{
bRet = true;
break;
}
int nLineCount = 0;
int nWinWidth = 0;
stdTUString FullString = pszText;
if (tSize.Width() == 0)
{
// not specified the width,calculate the width and line count
stdTUString strLeft = FullString;
stdTUString strLine;
while (strLeft.length() > 0)
{
int nPos = strLeft.find('\n');
// get one line text
if (nPos != stdTUString::npos)
{
strLine = strLeft.substr(0, nPos);
strLeft = strLeft.substr(nPos + 1);
}
else
{
strLine = strLeft;
strLeft.erase();
}
// calculate the width of current line and update the window width
int nTempWidth = m_hFont.CharsWidth(strLine.c_str(), strLine.length() + 1);
if (nTempWidth >= nWinWidth)
{
nWinWidth = nTempWidth;
}
// update the line count
++nLineCount;
}
}
else
{
// have specified the window width,calculate the line count
nWinWidth = tSize.Width();
stdTUString strLeft = FullString;
int nCurPos = 0;
do
{
nCurPos = m_hFont.WordWrap(strLeft.c_str(), nWinWidth);
strLeft = strLeft.substr(nCurPos);
++nLineCount;
} while (strLeft.length() > 0);
}
// calculate the window height.
tSize.SetHeight(nLineCount * m_hFont.LineHeight());
tSize.SetWidth(nWinWidth);
bRet = true;
} while (0);
return bRet;
}
int drawText(TUChar* pszText, int nLen, TSize& tSize, UInt32 style)
{
int nRet = 0;
do
{
CC_BREAK_IF(! pszText);
if (tSize.Width() <= 0 || tSize.Height() <= 0)
{
CC_BREAK_IF(! getTextExtentPoint(pszText, nLen, tSize));
}
CC_BREAK_IF(tSize.Width() <= 0 || tSize.Height() <= 0);
CC_BREAK_IF(! prepareBitmap(tSize.Width(), tSize.Height()));
Int32 nWidth = tSize.Width();
Int32 nHeight = tSize.Height();
// create memory window
if (m_pMemWnd)
{
TRectangle rcMemWnd(0, 0, 0, 0);
m_pMemWnd->GetClientBounds(&rcMemWnd);
if (rcMemWnd.Width() < nWidth || rcMemWnd.Height() < nHeight)
{
m_pMemWnd->CloseWindow();
m_pMemWnd = NULL;
}
}
do
{
// if memory window is already break
CC_BREAK_IF(m_pMemWnd);
TApplication* pApp = TApplication::GetCurrentApplication();
CC_BREAK_IF(! pApp || ! (m_pMemWnd = new TWindow(pApp)));
Coord nCurrentWidth = pApp->GetScreenWidth();
Coord nCurrentHeight = pApp->GetScreenHeight();
Coord nMemWndW = (nWidth >= nCurrentWidth) ? nWidth : nCurrentWidth;
Coord nMemWndH = (nHeight >= nCurrentHeight) ? nHeight : nCurrentHeight;
CC_BREAK_IF(m_pMemWnd->CreateMemWindow(nMemWndW, nMemWndH,screenAlphaFormat));
delete m_pMemWnd;
m_pMemWnd = NULL;
} while (0);
CC_BREAK_IF(! m_pMemWnd);
// create DC
TDC dc(m_pMemWnd);
// draw text
m_pMemWnd->GetMemWindowTBitmapPtr()->Fill32(RGBA(0, 0, 0, 0), 0, 0, nWidth, nHeight);
TRectangle rect(0, 0, nWidth, nHeight);
dc.DrawTextInRectangleEx(pszText, 0, RGBA(255,255,255,255), RGBA(0,0,0,255), m_hFont, &rect, style);
dc.ReadBitmap(m_pBmp, 0, 0);
nRet = true;
} while (0);
return nRet;
}
