protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
{
if (IsInHitTest)
{
return;
}
int lastBar = ChartBars.ToIndex;
int firstBar = ChartBars.FromIndex;
double highPrice = 0;
double lowPrice = double.MaxValue;
SharpDX.Direct2D1.Brush brushDown = BarDownBrush.ToDxBrush(RenderTarget);
SharpDX.Direct2D1.Brush lineBrush = LineBrush.ToDxBrush(RenderTarget);
SharpDX.Direct2D1.Brush brushUp = BarUpBrush.ToDxBrush(RenderTarget);
brushDown.Opacity = (float)(Opacity / 100.0);
brushUp.Opacity = (float)(Opacity / 100.0);
for (int idx = firstBar; idx <= lastBar && idx >= 0; idx++)
{
highPrice = Math.Max(highPrice, Bars.GetHigh(idx));
lowPrice = Math.Min(lowPrice, Bars.GetLow(idx));
}
int volumeBarCount = BarCount;
double priceRange = highPrice - lowPrice;
double priceBoxSize = priceRange / volumeBarCount;
double volumeMax = 0;
// Pass 1: Fill all VolumeInfo structures with appropriate data
for (int i = 0; i < volumeBarCount; i++)
{
double priceUpper = lowPrice + priceBoxSize * (i + 1);
double priceLower = lowPrice + priceBoxSize * i;
double priceVolumeUp = 0;
double priceVolumeDown = 0;
for (int idx = firstBar; idx <= lastBar; idx++)
{
double checkPrice;
PriceSeries series = (Inputs[0] as PriceSeries);
switch (series.PriceType)
{
case PriceType.Open: checkPrice = Bars.GetOpen(idx); break;
case PriceType.Close: checkPrice = Bars.GetClose(idx); break;
case PriceType.High: checkPrice = Bars.GetHigh(idx); break;
case PriceType.Low: checkPrice = Bars.GetLow(idx); break;
case PriceType.Median: checkPrice = (Bars.GetHigh(idx) + Bars.GetLow(idx)) / 2; break;
case PriceType.Typical: checkPrice = (Bars.GetHigh(idx) + Bars.GetLow(idx) + Bars.GetClose(idx)) / 3; break;
case PriceType.Weighted: checkPrice = (Bars.GetHigh(idx) + Bars.GetLow(idx) + 2 * Bars.GetClose(idx)) / 4; break;
default: checkPrice = Bars.GetClose(idx); break;
}
if (checkPrice >= priceLower && checkPrice < priceUpper)
{
if (Bars.GetOpen(idx) < Bars.GetClose(idx))
{
priceVolumeUp += Bars.GetVolume(idx);
}
else
{
priceVolumeDown += Bars.GetVolume(idx);
}
}
}
volumeInfo[i].up = priceVolumeUp;
volumeInfo[i].down = priceVolumeDown;
volumeInfo[i].total = priceVolumeUp + priceVolumeDown;
volumeMax = Math.Max(volumeMax, volumeInfo[i].total);
}
// Pass 2: Paint the volume bars
for (int i = 0; i < Math.Min(volumeBarCount, lastBar - firstBar + 1); i++)
{
double priceUpper = lowPrice + priceBoxSize * (i + 1);
double priceLower = lowPrice + priceBoxSize * i;
int yUpper = Convert.ToInt32(chartScale.GetYByValue(priceUpper)) + BarSpacing;
int yLower = Convert.ToInt32(chartScale.GetYByValue(priceLower));
int barWidthUp = (int)((chartScale.Height / 2) * (volumeInfo[i].up / volumeMax));
int barWidthDown = (int)((chartScale.Height / 2) * (volumeInfo[i].down / volumeMax));
SharpDX.RectangleF rect = new SharpDX.RectangleF(ChartPanel.X, yUpper, barWidthUp, Math.Abs(yUpper - yLower));
RenderTarget.FillRectangle(rect, brushUp);
RenderTarget.DrawRectangle(rect, brushUp);
SharpDX.RectangleF rect2 = new SharpDX.RectangleF(ChartPanel.X + barWidthUp, yUpper, barWidthDown, Math.Abs(yUpper - yLower));
RenderTarget.DrawRectangle(rect2, brushDown);
RenderTarget.FillRectangle(rect2, brushDown);
if (DrawLines)
{
RenderTarget.DrawLine(new SharpDX.Vector2(ChartPanel.X, yLower), new SharpDX.Vector2(ChartPanel.X + ChartPanel.W, yLower), lineBrush);
if (i == volumeBarCount - 1)
{
RenderTarget.DrawLine(new SharpDX.Vector2(ChartPanel.X, yUpper), new SharpDX.Vector2(ChartPanel.X + ChartPanel.W, yUpper), lineBrush);
}
}
}
lineBrush.Dispose();
brushDown.Dispose();
brushUp.Dispose();
}
protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
{
if (Bars == null || Bars.Instrument == null || IsInHitTest)
{
return;
}
int firstBarIdxToPaint = -1;
double tickSize = Bars.Instrument.MasterInstrument.TickSize;
double volumeMax = 0;
SharpDX.Direct2D1.Brush upBrush = VolumeUpBrush.ToDxBrush(RenderTarget);
SharpDX.Direct2D1.Brush downBrush = VolumeDownBrush.ToDxBrush(RenderTarget);
SharpDX.Direct2D1.Brush neutralBrush = VolumeNeutralBrush.ToDxBrush(RenderTarget);
SharpDX.Direct2D1.Brush lineBrushDx = LineBrush.ToDxBrush(RenderTarget);
upBrush.Opacity = (float)(alpha / 100.0);
downBrush.Opacity = (float)(alpha / 100.0);
neutralBrush.Opacity = (float)(alpha / 100.0);
for (int i = newSessionBarIdx.Count - 1; i >= 0; i--)
{
int prevSessionBreakIdx = newSessionBarIdx[i];
if (prevSessionBreakIdx <= ChartBars.ToIndex)
{
startIndexOf = newSessionBarIdx.IndexOf(prevSessionBreakIdx);
firstBarIdxToPaint = prevSessionBreakIdx;
break;
}
}
if (sortedDicList.Count < 1 && cacheDictionary.Keys.Count > 0)
{
sortedDicList.Add(cacheDictionary);
}
foreach (Dictionary <double, VolumeInfoItem> tmpDict in sortedDicList)
{
foreach (KeyValuePair <double, VolumeInfoItem> keyValue in tmpDict)
{
double price = keyValue.Key;
if (Bars.BarsType.IsIntraday && (price > chartScale.MaxValue || price < chartScale.MinValue))
{
continue;
}
VolumeInfoItem vii = keyValue.Value;
double total = vii.up + vii.down + vii.neutral;
volumeMax = Math.Max(volumeMax, total);
}
}
if (volumeMax.ApproxCompare(0) == 0)
{
return;
}
int viiPositions = 0;
foreach (KeyValuePair <double, VolumeInfoItem> keyValue in sortedDicList[startIndexOf])
{
viiPositions++;
VolumeInfoItem vii = keyValue.Value;
double priceLower = keyValue.Key - tickSize / 2;
float yLower = chartScale.GetYByValue(priceLower);
float yUpper = chartScale.GetYByValue(priceLower + tickSize);
float height = Math.Max(1, Math.Abs(yUpper - yLower) - barSpacing);
int barWidthUp = (int)((ChartPanel.W / 2) * (vii.up / volumeMax));
int barWidthNeutral = (int)((ChartPanel.W / 2) * (vii.neutral / volumeMax));
int barWidthDown = (int)((ChartPanel.W / 2) * (vii.down / volumeMax));
float stationaryXpos = chartControl.GetXByBarIndex(ChartBars, !Bars.IsTickReplay ? ChartBars.FromIndex : Math.Max(ChartBars.FromIndex, firstBarIdxToPaint));
float xpos = chartControl.GetXByBarIndex(ChartBars, !Bars.IsTickReplay ? ChartBars.FromIndex : Math.Max(1, Math.Max(ChartBars.FromIndex, firstBarIdxToPaint)) - 1);
RenderTarget.FillRectangle(new SharpDX.RectangleF(xpos, yUpper, barWidthUp, height), upBrush);
xpos += barWidthUp;
RenderTarget.FillRectangle(new SharpDX.RectangleF(xpos, yUpper, barWidthNeutral, height), neutralBrush);
xpos += barWidthNeutral;
RenderTarget.FillRectangle(new SharpDX.RectangleF(xpos, yUpper, barWidthDown, height), downBrush);
if (!drawLines)
{
continue;
}
// Lower line
RenderTarget.DrawLine(new SharpDX.Vector2(stationaryXpos, yLower), new SharpDX.Vector2((ChartPanel.X + ChartPanel.W), yLower), lineBrushDx);
// Upper line (only at very top)
if (viiPositions == sortedDicList[startIndexOf].Count)
{
RenderTarget.DrawLine(new SharpDX.Vector2(stationaryXpos, yUpper), new SharpDX.Vector2((ChartPanel.X + ChartPanel.W), yUpper), lineBrushDx);
}
}
lineBrushDx.Dispose();
upBrush.Dispose();
downBrush.Dispose();
neutralBrush.Dispose();
}
