private MinMaxValue GetMinMaxValues()
{
MinMaxValue _minmaxv = new MinMaxValue(1000000, -1000000);
foreach (Bar b in Bars.Values)
{
if (b.hiTick.Price > _minmaxv.MaxValue)
{
_minmaxv.MaxValue = b.hiTick.Price;
}
if (b.lowTick.Price < _minmaxv.MinValue)
{
_minmaxv.MinValue = b.lowTick.Price;
}
}
return(_minmaxv);
}
private void ClearWorkAreaGraph(double _pixelInPunkt)
{
graphC.Children.Clear();
Rectangle gback = new Rectangle();
gback.StrokeThickness = 1;
gback.Stroke = Brushes.Black;
gback.Fill = Brushes.LightGray;
gback.SnapsToDevicePixels = true;
gback.Width = graphC.ActualWidth - widthYArea;
gback.Height = graphC.ActualHeight - heightXArea;
Canvas.SetLeft(gback, widthYArea);
Canvas.SetTop(gback, 0);
graphC.Children.Add(gback);
MinMaxValue mm = this.GetMinMaxValues();
float stepY = mm.DeltaValue > 1600 ? 500 : 100;
float remainderY = mm.MaxValue % stepY;
for (float y = mm.MaxValue - remainderY; y > mm.MinValue; y -= stepY)
{
Line horizontLine = new Line();
horizontLine.X1 = widthYArea;
horizontLine.X2 = graphC.ActualWidth;// -widthYArea;
horizontLine.Y1 = horizontLine.Y2 = (mm.MaxValue - y) * graphC.ActualHeight / mm.DeltaValue;
horizontLine.Stroke = Brushes.Black;
horizontLine.StrokeThickness = 1;
horizontLine.SnapsToDevicePixels = true;
graphC.Children.Add(horizontLine);
TextBlock t = new TextBlock();
t.Text = y.ToString("### ###");
t.FontSize = 9;
graphC.Children.Add(t);
Canvas.SetLeft(t, 25);
Canvas.SetTop(t, (mm.MaxValue - y) * graphC.ActualHeight / mm.DeltaValue - 5);
}
}
//
// прорисовка графика со свечами
//
public void DrawGraph()
{
graphC.Dispatcher.BeginInvoke(DispatcherPriority.Normal,
(ThreadStart) delegate()
{
SolidColorBrush barBrushUp = new SolidColorBrush();
barBrushUp.Color = Color.FromArgb(255, 90, 20, 255);
SolidColorBrush barBrushDown = new SolidColorBrush();
barBrushDown.Color = Color.FromArgb(255, 255, 53, 50);
MinMaxValue mm = this.GetMinMaxValues();
double widthBar = (graphC.ActualWidth - widthYArea) / Bars.Count / 1.3;
double pixelInPunkt = (mm.MaxValue - mm.MinValue) / (graphC.ActualHeight - heightXArea);
if (widthBar > 5)
{
widthBar = 5;
}
ClearWorkAreaGraph(pixelInPunkt);
int i = -1;
foreach (Bar b in Bars.Values)
{
i++;
double topB = (mm.MaxValue - b.hiTick.Price) / pixelInPunkt;
double leftB = i * widthBar * 1.3 + widthYArea;
double heightB = (b.hiTick.Price - b.lowTick.Price) / pixelInPunkt;
Line currentShadow = new Line();
currentShadow.X1 = leftB + widthBar / 2;
currentShadow.X2 = leftB + widthBar / 2;
currentShadow.Y1 = topB;
currentShadow.Y2 = topB + heightB;
currentShadow.Stroke = Brushes.Black;
currentShadow.StrokeThickness = 1;
currentShadow.SnapsToDevicePixels = true;
Rectangle currentBar = new Rectangle();
if (b.closeTick.Price >= b.openTick.Price)
{
currentBar.Fill = barBrushUp;
}
else
{
currentBar.Fill = barBrushDown;
}
currentBar.StrokeThickness = 1;
currentBar.Stroke = Brushes.Black;
currentBar.SnapsToDevicePixels = true;
currentBar.Width = widthBar;
currentBar.Height = Math.Abs((b.openTick.Price - b.closeTick.Price) / pixelInPunkt);
Canvas.SetTop(currentBar, (mm.MaxValue - Math.Max(b.openTick.Price, b.closeTick.Price)) / pixelInPunkt);
Canvas.SetLeft(currentBar, leftB);
graphC.Children.Add(currentShadow);
graphC.Children.Add(currentBar);
}
});
}
