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#include "stdafx.h"
#include "CLCDGfx.h"
#include "CLCDObject.h"
#include "CLCDTextObject.h"
#include "CLCDLabel.h"
#include "math.h"
//************************************************************************
// constructor
//************************************************************************
CLCDLabel::CLCDLabel() : m_bCutOff(true), m_bWordWrap(false), m_iCutOffIndex(0),
m_iLineCount(0)
{
m_strText = L"";
}
//************************************************************************
// destructor
//************************************************************************
CLCDLabel::~CLCDLabel()
{
}
//************************************************************************
// initializes the label
//************************************************************************
bool CLCDLabel::Initialize()
{
if(!CLCDTextObject::Initialize())
return false;
return true;
}
//************************************************************************
// deinitializes the label
//************************************************************************
bool CLCDLabel::Shutdown()
{
if(!CLCDTextObject::Shutdown())
return false;
return true;
}
//************************************************************************
// updates the label
//************************************************************************
bool CLCDLabel::Update()
{
if(!CLCDTextObject::Update())
return false;
return true;
}
//************************************************************************
// draws the label
//************************************************************************
bool CLCDLabel::Draw(CLCDGfx *pGfx)
{
if(!CLCDTextObject::Draw(pGfx))
return false;
SelectObject(pGfx->GetHDC(),m_hFont);
int iTop = (int)(GetHeight()-(m_vLines.size()*m_iFontHeight))/2;///2;//()/2;
RECT rBoundary = {0,iTop,GetWidth(), GetHeight()-iTop};
vector<tstring>::iterator iter = m_vLines.begin();
while(!m_vLines.empty() && iter != m_vLines.end())
{
DrawTextEx(pGfx->GetHDC(), (LPTSTR)(*iter).c_str(), (int)(*iter).length(), &rBoundary, m_iTextFormat, &m_dtp);
rBoundary.top += m_iFontHeight;
iter++;
}
return true;
}
//************************************************************************
// sets the label's text
//************************************************************************
void CLCDLabel::SetText(tstring strText)
{
m_strText = strText;
UpdateCutOffIndex();
}
//************************************************************************
// called when the labels font has changed
//************************************************************************
void CLCDLabel::OnFontChanged()
{
UpdateCutOffIndex();
}
//************************************************************************
// called when the labels size has changed
//************************************************************************
void CLCDLabel::OnSizeChanged(SIZE OldSize)
{
if(GetWidth() == OldSize.cx && GetHeight() == OldSize.cy)
return;
UpdateCutOffIndex();
}
//************************************************************************
// sets the wordwrap mode
//************************************************************************
void CLCDLabel::SetWordWrap(bool bEnable)
{
m_bWordWrap = bEnable;
}
//************************************************************************
// updates the cutoff index
//************************************************************************
void CLCDLabel::UpdateCutOffIndex()
{
int iLen = (int)m_strText.length();
m_vLines.clear();
if(iLen <= 0)
{
m_strCutOff = L"";
m_iCutOffIndex = 0;
return;
}
// variables
HDC hDC = CreateCompatibleDC(nullptr);
SelectObject(hDC, m_hFont);
if(nullptr == hDC)
return;
int iWidth = GetWidth();
SIZE sizeLine = {0, 0};
SIZE sizeCutOff = {0, 0};
int iAvailableLines = GetHeight()/m_iFontHeight;
// unitialized or too small labels need to be handled
if(iAvailableLines <= 0)
iAvailableLines = 1;
// process wordwrapping
int i = 0;
if(m_bWordWrap && GetWidth() > 0)
{
int *piExtents = new int[m_strText.length()];
wchar_t *szString = (wchar_t*)m_strText.c_str();
int iMaxChars = 0;
tstring::size_type pos = 0;
while(i<iLen && m_vLines.size() < iAvailableLines)
{
GetTextExtentExPoint(hDC, szString+i, (int)m_strText.length()-i, GetWidth(), &iMaxChars, piExtents, &sizeLine);
// filter out spaces or line breaks at the beginning of a new line
if(m_strText[i] == '\n' || m_strText[i] == ' ')
i++;
pos = m_strText.find(L"\n",i);
// check for linebreaks
if(pos != tstring::npos && pos != i && pos >= i && pos != i+iMaxChars)
iMaxChars = 1 + (int)pos - i;
// if the string doesnt fit, try to wrap the last word to the next line
else if(iMaxChars < iLen - i || sizeLine.cx >= GetWidth())
{
// find the last space in the line ( substract -1 from offset to ignore spaces as last chars )
pos = m_strText.rfind(L" ",i + iMaxChars -1 );
if(pos != tstring::npos && pos != i && pos >= i && pos != i+iMaxChars)
iMaxChars = 1 + (int)pos - i;
}
if(m_vLines.size() == iAvailableLines-1)
iMaxChars = iLen - i;
m_vLines.push_back(m_strText.substr(i,iMaxChars));
i += iMaxChars;
}
delete[] piExtents;
}
else
m_vLines.push_back(m_strText);
// calculate the cutoff position
GetTextExtentPoint(hDC,L"...",3,&sizeCutOff);
int *piWidths = new int[(*--m_vLines.end()).length()];
int iMaxChars = 0;
GetTextExtentExPoint(hDC,(*--m_vLines.end()).c_str(),(int)(*--m_vLines.end()).length(),iWidth,&iMaxChars,piWidths,&sizeLine);
if(iMaxChars < (*--m_vLines.end()).length())
{
for(iMaxChars--;iMaxChars>0;iMaxChars--)
{
if(piWidths[iMaxChars] + sizeCutOff.cx <= iWidth)
break;
}
(*--m_vLines.end()) = (*--m_vLines.end()).substr(0,iMaxChars) + L"...";
}
delete[] piWidths;
DeleteObject(hDC);
//if(GetWidth() == 0)
m_iLineCount = 1;
//else
// m_iLineCount = ceil((double)(sizeLine.cx + sizeCutOff.cx)/GetWidth());
//if(m_iLineCount > GetHeight()/m_iFontHeight)
// m_iLineCount = GetHeight()/m_iFontHeight;
}
//************************************************************************
// sets the cutoff mode
//************************************************************************
void CLCDLabel::SetCutOff(bool bEnable)
{
m_bCutOff = bEnable;
}
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