/// <summary>
/// Draw all the <see cref="OHLCBar"/>'s to the specified <see cref="Graphics"/>
/// device as a candlestick at each defined point.
/// </summary>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see cref="GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="curve">A <see cref="OHLCBarItem"/> object representing the
/// <see cref="OHLCBar"/>'s to be drawn.</param>
/// <param name="baseAxis">The <see cref="Axis"/> class instance that defines the base (independent)
/// axis for the <see cref="OHLCBar"/></param>
/// <param name="valueAxis">The <see cref="Axis"/> class instance that defines the value (dependent)
/// axis for the <see cref="OHLCBar"/></param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
public void Draw(Graphics g, GraphPane pane, OHLCBarItem curve,
Axis baseAxis, Axis valueAxis, float scaleFactor)
{
//ValueHandler valueHandler = new ValueHandler( pane, false );
float pixBase, pixHigh, pixLow, pixOpen, pixClose;
if (curve.Points != null)
{
//float halfSize = _size * scaleFactor;
float halfSize = GetBarWidth(pane, baseAxis, scaleFactor);
using (Pen pen = !curve.IsSelected ? new Pen(_color, _width) :
new Pen(Selection.Border.Color, Selection.Border.Width))
// using ( Pen pen = new Pen( _color, _penWidth ) )
{
// Loop over each defined point
for (int i = 0; i < curve.Points.Count; i++)
{
PointPair pt = curve.Points[i];
double date = pt.X;
double high = pt.Y;
double low = pt.Z;
double open = PointPair.Missing;
double close = PointPair.Missing;
if (pt is StockPt)
{
open = (pt as StockPt).Open;
close = (pt as StockPt).Close;
}
// Any value set to double max is invalid and should be skipped
// This is used for calculated values that are out of range, divide
// by zero, etc.
// Also, any value <= zero on a log scale is invalid
if (!curve.Points[i].IsInvalid3D &&
(date > 0 || !baseAxis._scale.IsLog) &&
((high > 0 && low > 0) || !valueAxis._scale.IsLog))
{
pixBase = (int)(baseAxis.Scale.Transform(curve.IsOverrideOrdinal, i, date) + 0.5);
//pixBase = baseAxis.Scale.Transform( curve.IsOverrideOrdinal, i, date );
pixHigh = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, high);
pixLow = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, low);
if (PointPair.IsValueInvalid(open))
{
pixOpen = Single.MaxValue;
}
else
{
pixOpen = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, open);
}
if (PointPair.IsValueInvalid(close))
{
pixClose = Single.MaxValue;
}
else
{
pixClose = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, close);
}
if (!curve.IsSelected && this._gradientFill.IsGradientValueType)
{
using (Pen tPen = GetPen(pane, scaleFactor, pt))
Draw(g, pane, baseAxis is XAxis || baseAxis is X2Axis,
pixBase, pixHigh, pixLow, pixOpen,
pixClose, halfSize, tPen);
}
else
{
Draw(g, pane, baseAxis is XAxis || baseAxis is X2Axis,
pixBase, pixHigh, pixLow, pixOpen,
pixClose, halfSize, pen);
}
}
}
}
}
}
/// <summary>
/// Add a candlestick graph (<see cref="OHLCBarItem"/> object) to the plot with
/// the given data points (<see cref="IPointList"/>) and properties.
/// </summary>
/// <remarks>
/// This is simplified way to add curves without knowledge of the
/// <see cref="CurveList"/> class. An alternative is to use
/// the <see cref="ZeeGraph.CurveList" /> Add() method.
/// Note that the <see cref="IPointList" />
/// should contain <see cref="StockPt" /> objects instead of <see cref="PointPair" />
/// objects in order to contain all the data values required for this curve type.
/// </remarks>
/// <param name="label">The text label (string) for the curve that will be
/// used as a <see cref="Legend"/> entry.</param>
/// <param name="points">A <see cref="IPointList"/> of double precision value pairs that define
/// the X and Y values for this curve</param>
/// <param name="color">The color to used for the curve line,
/// symbols, etc.</param>
/// <returns>A <see cref="CurveItem"/> class for the newly created curve.
/// This can then be used to access all of the curve properties that
/// are not defined as arguments to the
/// <see cref="AddOHLCBar(string,IPointList,Color)"/> method.</returns>
public OHLCBarItem AddOHLCBar( string label, IPointList points, Color color )
{
OHLCBarItem curve = new OHLCBarItem( label, points, color );
_curveList.Add( curve );
return curve;
}
/// <summary>
/// The Copy Constructor
/// </summary>
/// <param name="rhs">The <see cref="OHLCBarItem"/> object from which to copy</param>
public OHLCBarItem(OHLCBarItem rhs)
: base(rhs)
{
_bar = rhs._bar.Clone();
}
/// <summary>
/// The Copy Constructor
/// </summary>
/// <param name="rhs">The <see cref="OHLCBarItem"/> object from which to copy</param>
public OHLCBarItem( OHLCBarItem rhs )
: base(rhs)
{
_bar = rhs._bar.Clone();
}