public void Start(IndicatorInfo info)
{
if (info.VisibleBarCount < 1)
{
return;
}
float high, low, close, open;
Graphics gdi = info.GDI;
Color fg = info.Style.Foreground;
string format = "f" + info.ChartView.Digits;
using (Brush brushfgFont = new SolidBrush(fg))
using (Brush brushInvfgFont = new SolidBrush(Color.FromArgb(255, 255 - fg.R, 255 - fg.G, 255 - fg.B)))
using (Pen penGrid = new Pen(info.Style.Grid))
using (Pen penBarup = new Pen(info.Style.Barup))
using (Brush brushBarup = new SolidBrush(info.Style.Bullcandle))
using (Pen penBardown = new Pen(info.Style.Bardown))
using (Pen penLine = new Pen(info.Style.Linegraph))
using (Brush brushBardown = new SolidBrush(info.Style.Bearcandle))
{
int dx = info.RightMargin - info.OffsetShift - 1;
close = info.GetYPos(info.Bars[0].Close);
gdi.DrawLine(penGrid,
new PointF(info.LeftMargin + 1, close),
new PointF(info.RightMargin + 1, close));
float height = info.StrSize.Height;
gdi.FillRectangle(brushfgFont,
(float)(info.RightMargin + 2),
close - height / 2,
(float)info.ChartWidth - info.RightMargin - 3,
height);
gdi.DrawString(info.Bars[0].Close.ToString(format),
info.ChartFont,
brushInvfgFont, info.RightMargin + 6, close - height / 2 - 0.5f);
for (int i = info.ScrollBarCount; i < info.VisibleBarCount; i++)
{
dx -= info.BarWidth + info.BarPadding;
high = info.GetYPos(info.Bars[i].High);
low = info.GetYPos(info.Bars[i].Low);
close = info.GetYPos(info.Bars[i].Close);
open = info.GetYPos(info.Bars[i].Open);
switch (info.Properties.Chartsticks)
{
case Chartsticks.Candlesticks:
if (info.Bars[i].Close > info.Bars[i].Open)
{
gdi.DrawLine(penBarup,
new PointF(dx - info.BarCenter, high),
new PointF(dx - info.BarCenter, low));
gdi.FillRectangle(brushBarup,
(float)(dx - info.BarWidth),
close,
(float)info.BarWidth,
open - close);
gdi.DrawRectangle(penBarup,
(float)(dx - info.BarWidth),
close,
(float)info.BarWidth,
open - close);
}
else if (info.Bars[i].Close < info.Bars[i].Open)
{
gdi.DrawLine(penBardown,
new PointF(dx - info.BarCenter, high),
new PointF(dx - info.BarCenter, low));
gdi.FillRectangle(brushBardown,
(float)(dx - info.BarWidth),
open,
(float)info.BarWidth,
close - open);
gdi.DrawRectangle(penBardown,
(float)(dx - info.BarWidth),
open,
(float)info.BarWidth,
close - open);
}
else
{
gdi.DrawLine(penLine,
new PointF(dx - info.BarCenter, high),
new PointF(dx - info.BarCenter, low));
gdi.DrawLine(penLine,
new PointF(dx - info.BarWidth, open),
new PointF(dx, open));
gdi.DrawRectangle(penLine,
(float)(dx - info.BarWidth),
close,
(float)info.BarWidth,
open - close);
}
break;
case Chartsticks.LineChart:
break;
}
}
}
}
protected override void OnPaint(PaintEventArgs e)
{
ChartProperties properties = this.ChartView.Properties;
ChartStyle style = this.ChartView.Style;
Graphics g = e.Graphics;
g.Clear(style.Background);
//SizeF strSize = g.MeasureString((1m).ToString("f" + ChartView.Digits), ChartFont);
SizeF strSize = new SizeF(this.ChartView.SymbolWidth, 14);
Rectangle borderRect = new Rectangle(
BorderLeft,
BorderTop,
this.Width - BorderLeft - (12 + (int)strSize.Width) - 1,
this.Height - BorderTop - BorderBottom - 1);
//画图表边框
using (Pen penFg = new Pen(style.Foreground))
g.DrawRectangle(penFg, borderRect);
int offsetShift = 0;
if (properties.ChartShift)
{
offsetShift = ChartView.ChartShift;
}
const float figureWidth = 9.1f;
//画平移图表图标
float x = borderRect.Right - figureWidth - 1 - offsetShift;
float y = borderRect.Top + 1;
using (Brush brush = new SolidBrush(Color.FromArgb(255, 127, 137, 149)))
{
g.FillPolygon(brush, new PointF[]
{
new PointF(x, y),
new PointF(x + figureWidth, y),
new PointF(x + 4.5f, y + 5.0f)
});
}
List <Bar> bars = this.ChartView.Bars;
int barPadding = BarPaddings[this.ChartView.Zoom - 1];
int barWidth = BarWidths[this.ChartView.Zoom - 1];
int nVisibleWidth = (borderRect.Width - offsetShift - barWidth - barPadding);
//视图可见柱数
int nVisibleBarsCounter = nVisibleWidth / (barWidth + barPadding);
if (nVisibleBarsCounter < 1)
{
return;
}
int nScrollBarCount = this.ChartView.ScrollBarCount;
//计算最高最低
decimal highest = decimal.MinValue, lowest = decimal.MaxValue;
int nVisibleBarCount = nVisibleBarsCounter + nScrollBarCount;
if (nVisibleBarCount > bars.Count)
{
nVisibleBarCount = bars.Count;
}
if (nScrollBarCount >= nVisibleBarCount)
{
return;
}
if (nVisibleBarCount == 0)
{
return;
}
for (int i = nScrollBarCount; i < nVisibleBarCount; i++)
{
if (bars[i].High > highest)
{
highest = bars[i].High;
}
if (bars[i].Low < lowest)
{
lowest = bars[i].Low;
}
}
const int tickPadding = 32, TickTop = 14, tickBottom = 4;
decimal Point = (decimal)Math.Pow(10, -this.ChartView.Digits);
//扩展最高最低空间
int remainder = Remainders[this.ChartView.Digits];
int Power = (int)Math.Pow(10, this.ChartView.Digits);
decimal dtmp = highest * Power;
decimal mMax = (dtmp + remainder - dtmp % remainder) * Point;
dtmp = lowest * Power;
decimal mMin = (dtmp - dtmp % remainder) * Point;
//decimal pMax = decimal.Round(highest + Point * 99, 3);
//decimal pMin = decimal.Round(lowest - Point * 99, 3);
float centerH = strSize.Height / 2.0f;
int tickCount = (borderRect.Height - TickTop - tickBottom) / tickPadding;
if (tickCount == 0)
{
return;
}
decimal perTick = decimal.Round((mMax - mMin) / (decimal)tickCount, 4);
if (perTick == 0m)
{
perTick = 0.0001m;
}
int tickHeight = borderRect.Bottom - tickBottom;
info = new IndicatorInfo(this.ChartView, mMin, perTick)
{
Properties = properties,
Style = style,
BarCenter = BarCenters[ChartView.Zoom - 1],
BarPadding = barPadding,
VisibleBarCount = nVisibleBarCount,
VisibleBarsCounter = nVisibleBarsCounter,
BarWidth = barWidth,
GDI = g,
OffsetShift = offsetShift,
LeftMargin = BorderLeft,
RightMargin = borderRect.Right,
ChartWidth = this.Width,
ScrollBarCount = nScrollBarCount,
TickHeight = tickHeight,
TickPadding = tickPadding,
ChartFont = ChartFont,
StrSize = strSize
};
//画刻度尺
string format = "f" + this.ChartView.Digits;
using (Pen penFg = new Pen(style.Foreground))
{
using (Brush brFg = new SolidBrush(style.Foreground))
{
int yTick;
decimal mTick;
for (int nTick = 0; nTick <= tickCount; nTick++)
{
yTick = tickHeight - nTick * tickPadding;
mTick = (nTick * perTick + mMin);
g.DrawLine(penFg, borderRect.Right, yTick, borderRect.Right + 5, yTick);
g.DrawString(mTick.ToString(format), ChartFont, brFg, borderRect.Right + 6, yTick - centerH);
}
}
}
indicator.Start(info);
if (this.dropChart == null)
{
this.dropChart = new DropChart(this);
this.MouseMove += this.dropChart.OnMouseMove;
this.MouseDown += this.dropChart.OnMouseDown;
this.MouseUp += this.dropChart.OnMouseUp;
}
}
