private void drawCandleLine(DrawingContext dc, double highest, double lowest, DrawingObject obj)
{
var opens = obj.Vals;
var closes = obj.Vals1;
var highs = obj.Vals2;
var lows = obj.Vals3;
if (opens == null || closes == null || highs == null || lows == null
|| opens.Length==0
|| opens.Length != closes.Length || closes.Length != highs.Length || highs.Length != lows.Length)
{
return;
}
//绘制可视区域的K线
for (int i = 0; i < drawItemCount; ++i)
{
int itemIndex = drawItemStartIndex + i;
double xoffset = (int)(i * (itemWidth + itemSpace)) + 0.5 + left;
double yTop = (int)((highest - highs[itemIndex]) / (highest - lowest) * height) + 0.5 + top;
double yBottom = (int)((highest - lows[itemIndex]) / (highest - lowest) * height) + 0.5 + top;
double yOpen = (int)((highest - opens[itemIndex]) / (highest - lowest) * height) + 0.5 + top;
double yClose = (int)((highest - closes[itemIndex]) / (highest - lowest) * height) + 0.5 + top;
double bodyBottom = yOpen;
double bodyTop = yClose;
Color bodyColor = new Color();
bodyColor.R = 255;
bodyColor.G = 0;
bodyColor.B = 0;
if (opens[itemIndex] > closes[itemIndex])
{
bodyTop = yOpen;
bodyBottom = yClose;
bodyColor.R = 0;
bodyColor.G = 128;
bodyColor.B = 0;
}
var pen = getPen(0, 0, 0, 1);
var brush = getBrush(bodyColor.R, bodyColor.G, bodyColor.B);
//draw top vertical line
dc.DrawLine(pen, new Point(xoffset + itemWidth / 2, yTop), new Point(xoffset + itemWidth / 2, bodyTop));
//draw kline body
double bodyHeight = bodyBottom - bodyTop;
dc.DrawRectangle(brush, pen, new Rect(xoffset, bodyTop, itemWidth, bodyHeight));
//draw bottom line.
dc.DrawLine(pen, new Point(xoffset + itemWidth / 2, bodyBottom), new Point(xoffset + itemWidth / 2, yBottom));
}
}
private void drawZeroVerticalLines(DrawingContext dc, double highest, double lowest, DrawingObject obj)
{
if (obj.Type != DrawingObjectType.zVLines)
{
return;
}
initPart(obj.Part);
var pen = getPen(0, 0, 255, 1);
for (var i = 0; i < drawItemCount; ++i)
{
var itemIndex = drawItemStartIndex + i;
var xoffset = (int)(i * (itemWidth + itemSpace)) + 0.5 + left;
var yoffset = height - (int)((obj.Vals[itemIndex] + highest) / (2 * highest) * height) + 0.5 + top;
if (itemIndex > 0)
{
if (obj.Vals[itemIndex] * obj.Vals[itemIndex - 1] < 0)
{
if (obj.Vals[itemIndex - 1] < 0)
{
dc.DrawLine(getPen(255, 0, 0, 2.5), new Point(xoffset, top + height / 2 - 4), new Point(xoffset, top + height / 2 + 4));
}
if (obj.Vals[itemIndex - 1] > 0)
{
dc.DrawLine(getPen(0, 128, 0, 2.5), new Point(xoffset, top + height / 2 - 4), new Point(xoffset, top + height / 2 + 4));
}
continue;
}
}
pen.Thickness = 1;
dc.DrawLine(pen, new Point(xoffset, top + height / 2 + 0.5), new Point(xoffset, yoffset));
}
}
private void drawVLines(DrawingContext dc, double highest, double lowest, DrawingObject obj)
{
if (obj.Type != DrawingObjectType.vLines)
{
return;
}
var vals = obj.Vals;
for (var i = 0; i < drawItemCount; ++i)
{
int itemIndex = drawItemStartIndex + i;
double xoffset = (int)(i * (itemWidth + itemSpace)) + 0.5 + left;
double yoffset = (1.0 - vals[itemIndex] / highest) * height + 0.5 + top;
Color color = obj.Color;
if (obj.drawItemHandler != null)
{
//very slow.
/*
JSEngine.Inst.call(obj.drawItemHandler,priceFile.Opens[itemIndex],
priceFile.Closes[itemIndex],
priceFile.Highs[itemIndex],
priceFile.Lows[itemIndex],
priceFile.Vols[itemIndex],
priceFile.Amounts[itemIndex]);
* */
}
var pen = getPen(color.R, color.G, color.B, 1);
if (priceList.Opens[itemIndex] > priceList.Closes[itemIndex])
{
pen = getPen(255, 0, 0, 1);
}
else
{
pen = getPen(0, 128, 0, 1);
}
dc.DrawLine(pen, new Point(xoffset + itemWidth / 2, yoffset), new Point(xoffset + itemWidth / 2, top + height));
}
}
private void drawObj(DrawingContext dc,double highest,double lowest,DrawingObject obj)
{
initPart(obj.Part);
switch (obj.Type)
{
case DrawingObjectType.Line:
drawLine(dc, highest, lowest, obj);
break;
case DrawingObjectType.zVLines:
drawZeroVerticalLines(dc, highest, lowest, obj);
break;
case DrawingObjectType.CandleLine:
drawCandleLine(dc, highest, lowest, obj);
break;
case DrawingObjectType.vLines:
drawVLines(dc, highest, lowest, obj);
break;
}
}
internal void addDrawingObj(string id, double[] points, int part, Color c, double thickness,DrawingObjectType type )
{
DrawingObject obj =new DrawingObject()
{
Vals = points,
Part = part,
Color = c,
Thickness = thickness,
Type=type,
};
if (objects.ContainsKey(id))
{
objects[id] = obj;
return;
}
objects.Add(id,obj);
}
//
internal void addKLineObj(string id,int part, double[] open, double[] close, double[] high, double[] low)
{
DrawingObject obj = new DrawingObject()
{
Type=DrawingObjectType.CandleLine,
Vals=open,
Vals1=close,
Vals2=high,
Vals3=low
};
if (objects.ContainsKey(id))
{
objects[id] = obj;
return;
}
objects.Add(id, obj);
}
private void drawLine(DrawingContext dc, double highest, double lowest, DrawingObject obj)
{
var pen = getPen(obj.Color.R, obj.Color.G, obj.Color.B, obj.Thickness);
PathFigure pfFast = new PathFigure();
PathGeometry pgFast = new PathGeometry();
pgFast.Figures.Add(pfFast);
for (var i = 0; i < drawItemCount; ++i)
{
var itemIndex = drawItemStartIndex + i;
var xoffset = (int)(i * (itemWidth + itemSpace)) + 0.5 + left;
var yoffset = (int)((highest - obj.Vals[itemIndex]) / (highest - lowest) * height) + 0.5 + top;
if (i == 0)
{
pfFast.StartPoint = new Point(xoffset, yoffset);
}
else
{
pfFast.Segments.Add(new LineSegment(new Point(xoffset, yoffset), true));
}
}
dc.DrawGeometry(Brushes.Transparent, pen, pgFast);
}
