private IEnumerable <Point> GetGannEndPoints(ChartControl chartControl, ChartScale chartScale)
{
ChartPanel panel = chartControl.ChartPanels[PanelIndex];
Point anchorPoint = Anchor.GetPoint(chartControl, panel, chartScale);
foreach (GannAngle gannAngle in GannAngles.Where(ga => ga.IsVisible))
{
double dx = gannAngle.RatioX * chartControl.Properties.BarDistance;
double dVal = gannAngle.RatioY * PointsPerBar;
Point stepPoint = GetGannStepPoint(chartScale, anchorPoint.X, Anchor.Price, dx, dVal);
Point extendedEndPoint = GetExtendedPoint(anchorPoint, stepPoint);
yield return(new Point(Math.Max(extendedEndPoint.X, 1), Math.Max(extendedEndPoint.Y, 1)));
}
}
protected override void OnStateChange()
{
switch (State)
{
case State.SetDefaults:
Description = Custom.Resource.NinjaScriptDrawingToolGannFan;
Name = Custom.Resource.NinjaScriptDrawingToolGannFan;
Anchor = new ChartAnchor
{
DisplayName = Custom.Resource.NinjaScriptDrawingToolAnchor,
IsEditing = true,
};
FanDirection = GannFanDirection.UpRight;
PriceLevelOpacity = 5;
IsTextDisplayed = true;
PointsPerBar = -1;
break;
case State.Configure:
if (GannAngles.Count == 0)
{
Brush[] gannBrushes = { Brushes.Red, Brushes.MediumOrchid, Brushes.DarkSlateBlue, Brushes.SteelBlue,
Brushes.Gray, Brushes.MediumAquamarine, Brushes.Khaki, Brushes.Coral, Brushes.Red };
for (int i = 0; i < 9; i++)
{
int ratioX = i == 8 ? 8 : (i <= 4 ? 1 : i - 3);
int ratioY = i == 0 ? 8 : (i <= 4 ? 5 - i : 1);
GannAngles.Add(new GannAngle(ratioX, ratioY, gannBrushes[i % 8]));
}
}
break;
case State.Terminated:
Dispose();
break;
}
}
public override void OnRender(ChartControl chartControl, ChartScale chartScale)
{
RenderTarget.AntialiasMode = SharpDX.Direct2D1.AntialiasMode.PerPrimitive;
ChartPanel panel = chartControl.ChartPanels[PanelIndex];
Point anchorPoint = Anchor.GetPoint(chartControl, panel, chartScale);
Point lastEndPoint = new Point(0, 0);
SharpDX.Direct2D1.Brush lastBrush = null;
foreach (GannAngle gannAngle in GannAngles.Where(ga => ga.IsVisible && ga.Stroke != null).OrderBy(ga => (ga.RatioX / ga.RatioY)))
{
gannAngle.Stroke.RenderTarget = RenderTarget;
double dx = gannAngle.RatioX * chartControl.Properties.BarDistance;
double dVal = gannAngle.RatioY * PointsPerBar; //NT7, just multiple directly this is price not pixels //chartScale.GetPixelsForDistance(gannAngle.RatioY * PointsPerBar);
Vector gannDataVector = GetGannStepDataVector(dx, dVal);
Point extendedEndPoint = CalculateExtendedDataPoint(panel, chartScale, Convert.ToInt32(anchorPoint.X), Anchor.Price, gannDataVector);
// align to full pixel to avoid unneeded aliasing
double strokePixAdj = ((double)(gannAngle.Stroke.Width % 2)).ApproxCompare(0) == 0 ? 0.5d : 0d;
Vector pixelAdjustVec = new Vector(0, strokePixAdj);
SharpDX.Direct2D1.Brush tmpBrush = IsInHitTest ? chartControl.SelectionBrush : gannAngle.Stroke.BrushDX;
RenderTarget.DrawLine((anchorPoint + pixelAdjustVec).ToVector2(), (extendedEndPoint + pixelAdjustVec).ToVector2(), tmpBrush, gannAngle.Stroke.Width, gannAngle.Stroke.StrokeStyle);
if (lastBrush != null)
{
float oldOpacity = lastBrush.Opacity;
lastBrush.Opacity = PriceLevelOpacity / 100f;
// create geometry
SharpDX.Direct2D1.PathGeometry lineGeometry = new SharpDX.Direct2D1.PathGeometry(Core.Globals.D2DFactory);
SharpDX.Direct2D1.GeometrySink sink = lineGeometry.Open();
sink.BeginFigure(lastEndPoint.ToVector2(), SharpDX.Direct2D1.FigureBegin.Filled);
// Does the fill color need to fill a corner? Check and add a point
if (Math.Abs(lastEndPoint.Y - extendedEndPoint.Y) > 0.1 && Math.Abs(lastEndPoint.X - extendedEndPoint.X) > 0.1)
{
double boundaryX;
double boundaryY;
if (lastEndPoint.Y <= ChartPanel.Y || lastEndPoint.Y >= ChartPanel.Y + ChartPanel.H)
{
if (FanDirection == GannFanDirection.UpLeft || FanDirection == GannFanDirection.UpRight)
{
boundaryY = extendedEndPoint.Y;
boundaryX = lastEndPoint.X;
}
else
{
boundaryY = lastEndPoint.Y;
boundaryX = extendedEndPoint.X;
}
}
else
{
if (FanDirection == GannFanDirection.UpLeft || FanDirection == GannFanDirection.UpRight)
{
boundaryY = lastEndPoint.Y;
boundaryX = extendedEndPoint.X;
}
else
{
boundaryY = extendedEndPoint.Y;
boundaryX = lastEndPoint.X;
}
}
sink.AddLine(new SharpDX.Vector2((float)boundaryX, (float)boundaryY));
}
sink.AddLine(extendedEndPoint.ToVector2());
sink.AddLine((anchorPoint + pixelAdjustVec).ToVector2());
sink.AddLine((lastEndPoint).ToVector2());
sink.EndFigure(SharpDX.Direct2D1.FigureEnd.Closed);
sink.Close();
RenderTarget.FillGeometry(lineGeometry, lastBrush);
lineGeometry.Dispose();
lastBrush.Opacity = oldOpacity;
}
lastEndPoint = extendedEndPoint + pixelAdjustVec;
lastBrush = tmpBrush;
}
if (!IsTextDisplayed || IsInHitTest)
{
return;
}
foreach (GannAngle gannAngle in GannAngles.Where(ga => ga.IsVisible && ga.Stroke != null).OrderBy(ga => (ga.RatioX / ga.RatioY)))
{
gannAngle.Stroke.RenderTarget = RenderTarget;
double dx = gannAngle.RatioX * chartControl.Properties.BarDistance;
double dVal = gannAngle.RatioY * PointsPerBar; //NT7, just multiple directly this is price not pixels //chartScale.GetPixelsForDistance(gannAngle.RatioY * PointsPerBar);
Vector gannDataVector = GetGannStepDataVector(dx, dVal);
Point extendedEndPoint = CalculateExtendedDataPoint(panel, chartScale, Convert.ToInt32(anchorPoint.X), Anchor.Price, gannDataVector);
if (!IsTextDisplayed || IsInHitTest)
{
continue;
}
SimpleFont wpfFont = chartControl.Properties.LabelFont ?? new SimpleFont();
SharpDX.DirectWrite.TextFormat textFormat = wpfFont.ToDirectWriteTextFormat();
textFormat.TextAlignment = SharpDX.DirectWrite.TextAlignment.Leading;
textFormat.WordWrapping = SharpDX.DirectWrite.WordWrapping.NoWrap;
SharpDX.DirectWrite.TextLayout textLayout = new SharpDX.DirectWrite.TextLayout(Core.Globals.DirectWriteFactory, gannAngle.Name, textFormat, 100, textFormat.FontSize);
// once text is laid out, update used width to calcuated space required
float fontHeight = textLayout.Metrics.Height;
Point textEndPoint = new Point(extendedEndPoint.X, extendedEndPoint.Y);
if (textEndPoint.X > panel.X + panel.W - textLayout.Metrics.Width)
{
textEndPoint.X = panel.X + panel.W - textLayout.Metrics.Width;
textEndPoint.Y += textLayout.Metrics.Width;
}
if (gannDataVector.Y > 0)
{
if (textEndPoint.Y < panel.Y + (fontHeight * 0.5))
{
textEndPoint.Y = panel.Y + (fontHeight * 0.5);
}
}
else
{
if (textEndPoint.Y > panel.Y + panel.H - (fontHeight * 1.5))
{
textEndPoint.Y = panel.Y + panel.H - (fontHeight * 1.5);
}
}
float?marginResource = Application.Current.FindResource("FontModalTitleMargin") as float?;
float margin = 2f + (marginResource.HasValue ? marginResource.Value : 3f);
// Allow for changes in X position based on whether text is aligned to left or right edge of screen
float marginX = FanDirection == GannFanDirection.DownLeft || FanDirection == GannFanDirection.UpLeft ? margin : -2 * margin;
SharpDX.Vector2 endVec = new SharpDX.Vector2((float)textEndPoint.X, (float)textEndPoint.Y);
SharpDX.Matrix3x2 transformMatrix = SharpDX.Matrix3x2.Translation(endVec);
RenderTarget.Transform = transformMatrix;
RenderTarget.DrawTextLayout(new SharpDX.Vector2(marginX + margin, margin), textLayout, gannAngle.Stroke.BrushDX, SharpDX.Direct2D1.DrawTextOptions.NoSnap);
RenderTarget.Transform = SharpDX.Matrix3x2.Identity;
textFormat.Dispose();
textLayout.Dispose();
}
}
