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#ifndef __FAE7F26E_61ED_4951_BE87_5E022CDF21DF_Chart_h__
#define __FAE7F26E_61ED_4951_BE87_5E022CDF21DF_Chart_h__
#pragma once
namespace detail
{
template<class T> struct CConverter
{
static double Convert(const T& v)
{
return boost::numeric_cast<double>(v);
}
static tstring ToString(const T& v)
{
return boost::lexical_cast<tstring>(v);
}
};
template<> struct CConverter<double>
{
static double Convert(double v)
{
return v;
}
static tstring ToString(double v)
{
tostringstream s;
s.imbue(std::locale(""));
s << std::fixed << v;
return s.str();
}
};
}
template<class TXValue,class TYValue,class TXConverter = detail::CConverter<TXValue>,class TYConverter = detail::CConverter<TYValue> >
class CChart
{
private:
typedef std::pair<TXValue,TYValue> TValue;
typedef std::vector<TValue> TValues;
public:
CChart() : m_MaxY(),m_MinY()
{
ZeroMemory(&m_rect,sizeof(m_rect));
}
~CChart()
{
}
void AddValue(const TXValue& x,const TYValue& y)
{
if(m_aValues.empty())
{
m_MaxY = m_MinY = y;
}
else
{
m_MaxY = __max(y,m_MaxY);
m_MinY = __min(y,m_MinY);
}
m_aValues.push_back(std::make_pair(x,y));
}
void SetRect(int x,int y,int cx,int cy)
{
m_rect.left = x;
m_rect.right = x + cx;
m_rect.top = y;
m_rect.bottom = y + cy;
}
void Draw(HDC hdc)const
{
RECT rc = m_rect;
DrawBackground(hdc,rc);
if(false == m_aValues.empty())
{
::InflateRect(&rc,-10,-10);
DrawGrid(hdc,rc);
DrawAxis(hdc,rc);
DrawPoints(hdc,rc);
}
else
{
HFONT hFont = static_cast<HFONT>(::GetStockObject(DEFAULT_GUI_FONT));
HFONT hOldFont = static_cast<HFONT>(::SelectObject(hdc,hFont));
LPCTSTR pszText = TranslateT("There is no to show");
int nDrawTextResult = ::DrawText(hdc,pszText,::lstrlen(pszText),&rc,DT_SINGLELINE|DT_VCENTER|DT_CENTER);
assert(0 != nDrawTextResult);
::SelectObject(hdc,hOldFont);
BOOL bResult = ::DeleteObject(hFont);
assert(TRUE == bResult);
}
}
private:
void DrawBackground(HDC hdc,RECT& rc)const
{
// HBRUSH hBrush = ::CreateSolidBrush(RGB(255,0,0));//user preferable background color here!
// ::FillRect(hdc,&m_rect,hBrush);
// ::DeleteBrush(hBrush);
}
void DrawGrid(HDC hdc,RECT& rc)const
{
enum{number_of_lines = 5};
HPEN hPen = ::CreatePen(PS_SOLID,1,RGB(125,125,125));
HPEN hPenOld = static_cast<HPEN>(::SelectObject(hdc,hPen));
HFONT hFont = static_cast<HFONT>(::GetStockObject(DEFAULT_GUI_FONT));
HFONT hOldFont = static_cast<HFONT>(::SelectObject(hdc,hFont));
//vertical grid
int step = (rc.bottom-rc.top)/number_of_lines;
TYValue y_val = m_MinY + ((m_MaxY-m_MinY)/number_of_lines);
int nXIndent = 0;
for(int y = rc.bottom-step;y > rc.top;y-=step,y_val+=((m_MaxY-m_MinY)/number_of_lines))
{
tstring sY = TYConverter::ToString(y_val);
SIZE sizeText = {0,0};
BOOL bResult = ::GetTextExtentPoint32(hdc,sY.c_str(), (int)sY.size(), &sizeText);
assert(TRUE == bResult);
nXIndent = __max(nXIndent,sizeText.cx);
}
y_val = m_MinY + ((m_MaxY-m_MinY)/number_of_lines);
nXIndent += 2;
rc.left += nXIndent;
for(int y = rc.bottom-step;y > rc.top;y-=step,y_val+=((m_MaxY-m_MinY)/number_of_lines))
{
tstring sY = TYConverter::ToString(y_val);
SIZE sizeText = {0,0};
BOOL bResult = ::GetTextExtentPoint32(hdc, sY.c_str(), (int)sY.size(), &sizeText);
assert(TRUE == bResult);
RECT rcText = {rc.left-nXIndent,y-(sizeText.cy/2),rc.left-1,y+(sizeText.cy/2)};
int nDrawTextResult = ::DrawText(hdc, sY.c_str(), (int)sY.size(), &rcText, DT_SINGLELINE|DT_VCENTER|DT_RIGHT);
assert(0 != nDrawTextResult);
bResult = ::MoveToEx(hdc,rc.left,y,NULL);
assert(TRUE == bResult);
bResult = ::LineTo(hdc,rc.right,y);
assert(TRUE == bResult);
}
// horizontal grid
HRGN rgnAllLables = ::CreateRectRgn(0,0,0,0);
HRGN rgnTemporary = ::CreateRectRgn(0,0,0,0);
bool bFixedRect = false;
step = (rc.right-rc.left)/number_of_lines;
TXValue x_val = m_aValues[0].first + ((m_aValues[m_aValues.size()-1].first-m_aValues[0].first)/number_of_lines);
for(int x = rc.left+step;x < rc.right;x+=step,x_val+=((m_aValues[m_aValues.size()-1].first-m_aValues[0].first)/number_of_lines))
{
tstring sX = TXConverter::ToString(x_val);
SIZE sizeText = {0,0};
BOOL bResult = ::GetTextExtentPoint32(hdc, sX.c_str(), (int)sX.size(), &sizeText);
assert(TRUE == bResult);
if(false == bFixedRect)
{
rc.bottom -= sizeText.cy+2;
bFixedRect = true;
}
RECT rcText = {x-(sizeText.cx/2),rc.bottom,x+(sizeText.cx/2),rc.bottom+sizeText.cy-1};
// Draw a label if it doesn't overlap with previous ones
HRGN rgnCurrentLable = ::CreateRectRgnIndirect(&rcText);
if(NULLREGION == ::CombineRgn(rgnTemporary,rgnCurrentLable,rgnAllLables,RGN_AND))
{
int nDrawTextResult = ::DrawText(hdc, sX.c_str(), (int)sX.size(), &rcText, DT_SINGLELINE|DT_VCENTER|DT_CENTER);
assert(0 != nDrawTextResult);
int nCombineRgnResult = ::CombineRgn(rgnTemporary,rgnCurrentLable,rgnAllLables,RGN_OR);
assert(ERROR != nCombineRgnResult);
nCombineRgnResult = ::CombineRgn(rgnAllLables,rgnTemporary,NULL,RGN_COPY);
assert(ERROR != nCombineRgnResult);
}
bResult = ::DeleteObject(rgnCurrentLable);
assert(TRUE == bResult);
bResult = ::MoveToEx(hdc,x,rc.bottom,NULL);
assert(TRUE == bResult);
bResult = ::LineTo(hdc,x,rc.top);
assert(TRUE == bResult);
}
BOOL bResult = ::DeleteObject(rgnAllLables);
assert(TRUE == bResult);
bResult = ::DeleteObject(rgnTemporary);
assert(TRUE == bResult);
::SelectObject(hdc,hOldFont);
::SelectObject(hdc,hPenOld);
bResult = ::DeleteObject(hFont);
assert(TRUE == bResult);
bResult = ::DeleteObject(hPen);
assert(TRUE == bResult);
}
void DrawAxis(HDC hdc,RECT& rc)const
{
HPEN hPen = ::CreatePen(PS_SOLID,2,RGB(0,0,0));
HPEN hPenOld = static_cast<HPEN>(::SelectObject(hdc,hPen));
// draw Y-axes
BOOL bResult = ::MoveToEx(hdc,rc.left+1,rc.bottom-1,NULL);
assert(TRUE == bResult);
bResult = ::LineTo(hdc,rc.left+1,rc.top+1);
assert(TRUE == bResult);
// draw X-axes
bResult = ::MoveToEx(hdc,rc.left+1,rc.bottom-1,NULL);
assert(TRUE == bResult);
bResult = ::LineTo(hdc,rc.right-1,rc.bottom-1);
assert(TRUE == bResult);
::SelectObject(hdc,hPenOld);
bResult = ::DeleteObject(hPen);
assert(TRUE == bResult);
}
void DrawPoints(HDC hdc,RECT& rc)const
{
TXValue xMin(m_aValues[0].first);
double dx = TXConverter::Convert(m_aValues[m_aValues.size()-1].first-xMin);
double dY = TYConverter::Convert(m_MaxY-m_MinY);
HPEN hPen = ::CreatePen(PS_SOLID,1,RGB(255,0,0));
HGDIOBJ hPenOld = ::SelectObject(hdc,hPen);
HBRUSH hBrush = ::CreateSolidBrush(RGB(255,0,0));
HGDIOBJ hBrushOld = ::SelectObject(hdc,hBrush);
bool bPrevValid = false;
int xPrex,yPrev;
BOOST_FOREACH(const TValue& v,m_aValues)
{
double k = TXConverter::Convert(v.first-xMin);
int x = rc.left+boost::numeric_cast<int>((rc.right-rc.left)*(k/dx));
k = TYConverter::Convert(v.second-m_MinY);
int y = rc.bottom-boost::numeric_cast<int>((rc.bottom-rc.top)*(k/dY));
::Ellipse(hdc,x-5,y-5,x+5,y+5);
if(bPrevValid)
{
BOOL bResult = ::MoveToEx(hdc,xPrex,yPrev,NULL);
assert(TRUE == bResult);
bResult = ::LineTo(hdc,x,y);
assert(TRUE == bResult);
}
xPrex = x,yPrev = y;
bPrevValid = true;
}
::SelectObject(hdc,hPenOld);
BOOL bResult = ::DeleteObject(hPen);
assert(TRUE == bResult);
::SelectObject(hdc,hBrushOld);
bResult = ::DeleteObject(hBrush);
assert(TRUE == bResult);
}
private:
TValues m_aValues;
RECT m_rect;
TYValue m_MaxY;
TYValue m_MinY;
};
#endif // __FAE7F26E_61ED_4951_BE87_5E022CDF21DF_Chart_h__
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