CSize CChartLegend::GetSize(CDC* pDC) const
{
CSize LegendSize;
CSize TextSize;
if (!m_bIsVisible)
{
LegendSize.cx = LegendSize.cy = 0;
return LegendSize;
}
CFont* pOldFont;
CFont NewFont;
NewFont.CreatePointFont(m_iFontSize, (LPCTSTR)m_strFontName.c_str(),pDC);
pOldFont = pDC->SelectObject(&NewFont);
int Height = 4; //Upper space
int Width = 0;
int MaxTextWidth = 0;
size_t SeriesCount = m_pParent->GetSeriesCount();
int Drawn = 0;
for (size_t i=0;i<SeriesCount;i++)
{
CChartSerie* pSerie = m_pParent->GetSerie(i);
if ( (pSerie->GetName() == _T("")) || !pSerie->IsVisible() )
continue;
Drawn++;
CSize BitmapSize =pSerie->GetLegendSize();
TextSize = pDC->GetTextExtent(pSerie->GetName().c_str());
if (TextSize.cy>BitmapSize.cy)
Height += TextSize.cy + 2;
else
Height += BitmapSize.cy + 2;
if ( (TextSize.cx + BitmapSize.cx + 6)> MaxTextWidth)
MaxTextWidth = TextSize.cx + BitmapSize.cx + 6;
}
if (!Drawn)
{
LegendSize.cx = LegendSize.cy = 0;
return LegendSize;
}
Width += MaxTextWidth + 6;
LegendSize.cx = Width;
LegendSize.cy = Height+2;
pDC->SelectObject(pOldFont);
DeleteObject(NewFont);
return LegendSize;
}
void CChartLegend::Draw(CDC *pDC)
{
if (!pDC->GetSafeHdc())
return;
if (!m_bIsVisible)
return;
int YPos = 2;
int MaxBitmapWidth = 0;
bool bDraw = false;
size_t SeriesCount = m_pParent->GetSeriesCount();
size_t i=0;
for (i=0;i<SeriesCount;i++)
{
CChartSerie* pSerie = m_pParent->GetSerie(i);
if ( (pSerie->GetName() == _T("")) || !pSerie->IsVisible() )
continue;
bDraw = true;
CSize BitmapSize = pSerie->GetLegendSize();
if (BitmapSize.cx > MaxBitmapWidth)
MaxBitmapWidth = BitmapSize.cx;
}
if (!bDraw)
return;
CPen SolidPen(PS_SOLID,0,RGB(0,0,0));
CPen* pOldPen;
CFont* pOldFont;
CFont NewFont;
NewFont.CreatePointFont(m_iFontSize,(LPCTSTR)m_strFontName.c_str(),pDC);
//Fill back color
CBrush m_BrushBack;
m_BrushBack.CreateSolidBrush(m_ObjectColor) ;
pDC->FillRect(m_ObjectRect,&m_BrushBack);
COLORREF OldColor = pDC->SetBkColor(m_ObjectColor);
pOldFont = pDC->SelectObject(&NewFont);
pOldPen = pDC->SelectObject(&SolidPen);
//Draw rectangle:
pDC->MoveTo(m_ObjectRect.left,m_ObjectRect.top);
pDC->LineTo(m_ObjectRect.right,m_ObjectRect.top);
pDC->LineTo(m_ObjectRect.right,m_ObjectRect.bottom);
pDC->LineTo(m_ObjectRect.left,m_ObjectRect.bottom);
pDC->LineTo(m_ObjectRect.left,m_ObjectRect.top);
CPoint UpperLeft;
UpperLeft.x = m_ObjectRect.left;
UpperLeft.y = m_ObjectRect.top + 4;
for (i=0;i<SeriesCount;i++)
{
CChartSerie* pSerie = m_pParent->GetSerie(i);
int NewHeight = pSerie->DrawLegend(pDC,UpperLeft,MaxBitmapWidth);
UpperLeft.y += NewHeight+2;
}
pDC->SelectObject(pOldFont);
DeleteObject(NewFont);
pDC->SelectObject(pOldPen);
DeleteObject(SolidPen);
pDC->SetBkColor(OldColor);
}