private void DrawObj(DrawingContext dc, double highest, double lowest, DrawObject obj)
{
switch (obj.Type)
{
case DrawObjectType.Line:
drawLine(dc, highest, lowest, obj);
break;
case DrawObjectType.zVLines:
DrawZeroVerticalLines(dc, highest, lowest, obj);
break;
case DrawObjectType.CandleLine:
DrawCandleLine(dc, highest, lowest, obj);
break;
case DrawObjectType.vLines:
DrawVLines(dc, highest, lowest, obj);
break;
}
}
//绘制以0为基准的垂线，类似MACD线
private void DrawZeroVerticalLines(DrawingContext dc, double highest, double lowest, DrawObject obj)
{
if (obj.Type != DrawObjectType.zVLines)
{
return;
}
for (var i = 0; i < drawItemCount; ++i)
{
var itemIndex = drawItemStartIndex + i;
var xoffset = (int)(i * (itemWidth + itemSpace)) + 0.5 + ChartStartX;
var yoffset = ChartHeight - (int)((obj.Vals[itemIndex] + highest) / (2 * highest) * ChartHeight) + 0.5 + ChartStartY;
if (itemIndex > 0)
{
if (obj.Vals[itemIndex] * obj.Vals[itemIndex - 1] < 0) //正负交汇处画粗线
{
if (obj.Vals[itemIndex - 1] < 0)
{
Pen gpen = getPen(255, 0, 0, 1); //绿色
gpen.Thickness = 2.5;
dc.DrawLine(gpen, new Point(xoffset, ChartStartY + ChartHeight / 2 - 4), new Point(xoffset, ChartStartY + ChartHeight / 2 + 4));
}
if (obj.Vals[itemIndex - 1] > 0)
{
Pen rpen = getPen(0, 128, 0, 1); //红色
rpen.Thickness = 2.5;
dc.DrawLine(rpen, new Point(xoffset, ChartStartY + ChartHeight / 2 - 4), new Point(xoffset, ChartStartY + ChartHeight / 2 + 4));
}
continue;
}
}
if (obj.Vals[itemIndex] > 0)
{
Pen gpen = getPen(255, 0, 0, 1); //绿色
gpen.Thickness = 1;
dc.DrawLine(gpen, new Point(xoffset, ChartStartY + ChartHeight / 2 + 0.5), new Point(xoffset, yoffset));
}
else
{
Pen rpen = getPen(0, 128, 0, 1); //红色
rpen.Thickness = 1;
dc.DrawLine(rpen, new Point(xoffset, ChartStartY + ChartHeight / 2 + 0.5), new Point(xoffset, yoffset));
}
}
}
//绘制Candle线
private void DrawCandleLine(DrawingContext dc, double highest, double lowest, DrawObject 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 + ChartStartX;
double yTop = (int)((highest - highs[itemIndex]) / (highest - lowest) * ChartHeight) + 0.5 + ChartStartY;
double yBottom = (int)((highest - lows[itemIndex]) / (highest - lowest) * ChartHeight) + 0.5 + ChartStartY;
double yOpen = (int)((highest - opens[itemIndex]) / (highest - lowest) * ChartHeight) + 0.5 + ChartStartY;
double yClose = (int)((highest - closes[itemIndex]) / (highest - lowest) * ChartHeight) + 0.5 + ChartStartY;
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));
}
}
