public override void Draw(Graphics _canvas, double _fStretchFactor, bool _bSelected, long _iCurrentTimestamp, Point _DirectZoomTopLeft)
{
double fOpacityFactor = m_InfosFading.GetOpacityFactor(_iCurrentTimestamp);
if (fOpacityFactor > 0)
{
// Rescale the points.
m_fStretchFactor = _fStretchFactor;
m_DirectZoomTopLeft = new Point(_DirectZoomTopLeft.X, _DirectZoomTopLeft.Y);
RescaleCoordinates(m_fStretchFactor, m_DirectZoomTopLeft);
//----------------------------------------------------------
// Draw disk section
// Unfortunately we need to compute everything at each draw
// (draw may be triggered on image resize)
//----------------------------------------------------------
ComputeFillRegion();
SolidBrush FillBrush = new SolidBrush(Color.FromArgb((int)((double)m_iDefaultBackgroundAlpha * fOpacityFactor), m_BackgroundFillColor));
Pen PenEdges = new Pen(m_InfosStyle.GetFadingBackColor(fOpacityFactor));
_canvas.FillPie(FillBrush, (float)m_BoundingPoint.X, (float)m_BoundingPoint.Y, (float)m_fRadius * 2, (float)m_fRadius * 2, m_fStartAngle, m_fSweepAngle);
_canvas.DrawPie(PenEdges, (float)m_BoundingPoint.X, (float)m_BoundingPoint.Y, (float)m_fRadius * 2, (float)m_fRadius * 2, m_fStartAngle, m_fSweepAngle);
//-----------------------------
// Draw the edges
//-----------------------------
_canvas.DrawLine(PenEdges, RescaledPointO.X, RescaledPointO.Y, RescaledPointA.X, RescaledPointA.Y);
_canvas.DrawLine(PenEdges, RescaledPointO.X, RescaledPointO.Y, RescaledPointB.X, RescaledPointB.Y);
//-----------------------------
// Draw handlers
//-----------------------------
if (_bSelected)
{
PenEdges.Width = 2;
}
_canvas.DrawEllipse(PenEdges, GetRescaledHandleRectangle(1));
_canvas.DrawEllipse(PenEdges, GetRescaledHandleRectangle(2));
_canvas.DrawEllipse(PenEdges, GetRescaledHandleRectangle(3));
//----------------------------
// Draw Measure
//----------------------------
// We try to be inside the pie, so we compute the bissectrice and do some trigo.
// We start the text on the bissectrice, at a distance of iTextRadius.
Point TextOrigin = GetTextPosition();
SolidBrush fontBrush = new SolidBrush(m_InfosStyle.GetFadingForeColor(fOpacityFactor));
int angle = (int)Math.Floor(-m_fSweepAngle);
_canvas.DrawString("α=" + angle.ToString() + "°", m_InfosStyle.GetInternalFont(), fontBrush, TextOrigin);
}
}
private void DrawText(Graphics _canvas, double _fFadingFactor)
{
int iOffsetX = 0;
int iOffsetY = 0;
if (m_bBackgroundIsRelative)
{
// see comment in DrawBackground
iOffsetX = m_RescaledLocation.X;
iOffsetY = m_RescaledLocation.Y;
}
// TODO: we should be able to get a font at the right size given a multiplicator somehow.
// and use GetInternalFont(double)
Font f = m_TextDecoration.GetInternalFont();
Font fontText = new Font(f.FontFamily, (float)m_fRescaledFontSize, f.Style);
_canvas.DrawString(" " + m_TextInfos[0], fontText, new SolidBrush(m_TextDecoration.GetFadingForeColor(_fFadingFactor)), new Point(RescaledBackground.X + iOffsetX + 5, RescaledBackground.Y + iOffsetY + 3));
}
public override void Draw(Graphics _canvas, double _fStretchFactor, bool _bSelected, long _iCurrentTimestamp, Point _DirectZoomTopLeft)
{
double fOpacityFactor = m_InfosFading.GetOpacityFactor(_iCurrentTimestamp);
if (fOpacityFactor > 0)
{
// Rescale the points.
m_fStretchFactor = _fStretchFactor;
m_DirectZoomTopLeft = new Point(_DirectZoomTopLeft.X, _DirectZoomTopLeft.Y);
RescaleCoordinates(m_fStretchFactor, m_DirectZoomTopLeft);
// This method may be used from worker threads and shouldn't touch UI controls.
// -> The textbox will not be modified here.
if (!m_bEditMode)
{
DrawBackground(_canvas, fOpacityFactor);
SolidBrush fontBrush = new SolidBrush(m_TextStyle.GetFadingForeColor(fOpacityFactor));
Font fontText = m_TextStyle.GetInternalFont((float)m_fStretchFactor);
_canvas.DrawString(m_Text, fontText, fontBrush, new Point(m_RescaledBackground.X + 5, m_RescaledBackground.Y + 3));
}
}
}
