private void RenderGrid(DrawingContext drawingContext)
{
var interval = LinearAxis.CalculateActualInterval(_graphContext.GraphHeigh, _graphContext.Min, _graphContext.Max, 4);
var ticks = LinearAxis.GetMajorValues(_graphContext.GraphHeigh, _graphContext.Min, _graphContext.Max, interval).ToList();
var typeface = new Typeface(new FontFamily("Segoe UI"), FontStyles.Normal, FontWeights.Normal, FontStretches.Normal);
_graphContext.MaxTextWidth = 0;
_graphContext.MaxTextHeight = 0;
foreach (var tick in ticks)
{
var text = new FormattedText(tick.ToString(_graphContext.DisplayFormat), CultureInfo.CurrentUICulture, FlowDirection.LeftToRight, typeface, 11, Brushes.Black);
var width = Math.Floor(text.Width) + 1.5;
if (width > _graphContext.MaxTextWidth)
{
_graphContext.MaxTextWidth = width;
}
var height = Math.Floor(text.Height) + 1.5;
if (height > _graphContext.MaxTextHeight)
{
_graphContext.MaxTextHeight = height;
}
}
_graphContext.MaxTextHeight = Math.Ceiling(_graphContext.MaxTextHeight);
_graphContext.MaxTextWidth = Math.Ceiling(_graphContext.MaxTextWidth);
_graphContext.GraphWidth = Math.Floor(ActualWidth - _graphContext.MaxTextWidth);
_graphContext.GraphHeigh = Math.Floor(ActualHeight - _graphContext.MaxTextHeight);
foreach (var tick in ticks)
{
var y = Math.Round(_graphContext.GraphHeigh - ((tick - _graphContext.Min) / (_graphContext.Max - _graphContext.Min) * _graphContext.GraphHeigh));
var text = new FormattedText(tick.ToString(_graphContext.DisplayFormat), CultureInfo.CurrentUICulture, FlowDirection.LeftToRight, typeface, 10, Brushes.Black);
drawingContext.DrawText(text, new Point(_graphContext.GraphWidth, y - text.Height / 2));
var pen = new Pen(Brushes.Black, 1);
drawingContext.PushOpacity(0.25);
drawingContext.DrawLine(pen, new Point(0, y), new Point(_graphContext.GraphWidth - 1, y));
drawingContext.Pop();
}
}
private void CalculateGrid(RenderingContext context)
{
var format = MaxPrice > 10 ? "0" : "0.0000";
var typeface = new Typeface(new FontFamily("Segoe UI"), FontStyles.Normal, FontWeights.Normal, FontStretches.Normal);
var testText = new FormattedText(context.MaxPrice.ToString(format), CultureInfo.CurrentUICulture, FlowDirection.LeftToRight, typeface, 10, Brushes.Black);
context.SimulationHeight = (int)(context.Height - testText.Height - 2);
context.SimulationWidth = (int)(context.Width - testText.Width - 2);
var intervalHorizontal = LinearAxis.CalculateActualInterval(context.SimulationHeight, context.MinPrice, context.MaxPrice, 4);
context.HorizontalTicks = LinearAxis.GetMajorValues(context.SimulationHeight, context.MinPrice, context.MaxPrice, intervalHorizontal).ToList();
var maxTime = context.EndDate.Subtract(context.StartDate.Date).TotalDays;
var delta = context.StartDate.Subtract(context.StartDate.Date).TotalDays;
var intervalVertical = LinearAxis.CalculateActualInterval(context.SimulationWidth, 0, maxTime, 4);
context.VerticalTicks = LinearAxis.GetMajorValues(context.SimulationWidth, 0, maxTime, intervalVertical).Select(t => t - delta).ToList();
}