/// <summary>
/// Draw all the <see cref="JapaneseCandleStick"/>'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="JapaneseCandleStickItem"/> object representing the
/// <see cref="JapaneseCandleStick"/>'s to be drawn.</param>
/// <param name="baseAxis">The <see cref="Axis"/> class instance that defines the base (independent)
/// axis for the <see cref="JapaneseCandleStick"/></param>
/// <param name="valueAxis">The <see cref="Axis"/> class instance that defines the value (dependent)
/// axis for the <see cref="JapaneseCandleStick"/></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 override void Draw(Graphics g, GraphPane pane, OHLCBarItem curve,
Axis baseAxis, Axis valueAxis, float scaleFactor)
{
//ValueHandler valueHandler = new ValueHandler( pane, false );
if (curve.Points == null)
{
return;
}
//float halfSize = _size * scaleFactor;
var halfSize = GetBarWidth(pane, baseAxis, scaleFactor);
var dotHalfSize = Math.Max(curve.DotHalfSize, IsAutoSize ? Math.Max(2, halfSize / 4) : curve.DotHalfSize)
* scaleFactor;
var tColor = Color;
var tFallingColor = FallingColor;
var tPenWidth = Width;
var tRisingFill = RisingFill;
var tFallingFill = FallingFill;
var tRisingBorder = RisingBorder;
var tFallingBorder = FallingBorder;
if (curve.IsSelected)
{
tColor = Selection.Border.Color;
tFallingColor = Selection.Border.Color;
tPenWidth = Selection.Border.Width;
tRisingFill = Selection.Fill;
tFallingFill = Selection.Fill;
tRisingBorder = Selection.Border;
tFallingBorder = Selection.Border;
}
using (var risingPen = curve.IsSelected
? new Pen(Selection.Border.Color, Selection.Border.Width)
: new Pen(tColor, tPenWidth))
using (var fallingPen = curve.IsSelected
? new Pen(Selection.Border.Color, Selection.Border.Width)
: new Pen(tFallingColor, tPenWidth))
{
// Loop over each defined point
for (int i = 0; i < curve.Points.Count; i++)
{
var pt = curve.Points[i];
double date;
double open;
double high;
double low;
double close;
GetOHLC(pt, out date, out open, out high, out low, out close);
curve.OnBeforeDrawEvent(this, i);
// 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].IsInvalid || (date <= 0 && baseAxis.Scale.IsLog) ||
((high <= 0 || low <= 0) && valueAxis.Scale.IsLog))
{
continue;
}
float pixBase = (int)(baseAxis.Scale.Transform(curve.IsOverrideOrdinal, i, date) + 0.5);
//pixBase = baseAxis.Scale.Transform( curve.IsOverrideOrdinal, i, date );
var pixHigh = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, high);
var pixLow = valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, low);
var pixOpen = PointPair.IsValueInvalid(open)
? float.MaxValue
: valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, open);
var pixClose = PointPair.IsValueInvalid(close)
? float.MaxValue
: valueAxis.Scale.Transform(curve.IsOverrideOrdinal, i, close);
var rising = close > open;
if (this.GradientFill.IsGradientValueType)
{
using (var tPen = GetPen(pane, scaleFactor, pt))
Draw(g, pane, baseAxis is IXAxis,
pixBase, pixHigh, pixLow, pixOpen,
pixClose, halfSize, scaleFactor,
(tPen),
(rising ? tRisingFill : tFallingFill),
(rising ? tRisingBorder : tFallingBorder), pt, dotHalfSize);
}
else
{
Draw(g, pane, baseAxis is IXAxis, pixBase, pixHigh, pixLow, pixOpen,
pixClose, halfSize, scaleFactor,
(rising ? risingPen : fallingPen),
(rising ? tRisingFill : tFallingFill),
(rising ? tRisingBorder : tFallingBorder), pt, dotHalfSize);
}
}
}
}
