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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()
{
memset(&m_rect, 0, 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 nothing to show");
int nDrawTextResult = ::DrawText(hdc, pszText, -1, &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(), -1, &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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