private void drawBar(Canvas canvas, float xMin, float yMin, float xMax, float yMax, int scale, int seriesIndex, Paint paint, FJABarChartDayModel day)
{
// select amounts for all periods of the day for which we are going to draw a bar
var amounts = day.Amounts.OrderByDescending(a => (int)a.Key).Select(a => a);
// select how contribution of each period from total gain amount of the day
var portions = amounts.Select(x => (x.Value * 100) / day.TotalAmount).ToList();
if (portions.Any(a => !float.IsNaN(a)))
{
int dcnt = day.Amounts.Count;
Color refcolor = Context.Resources.GetColor(Resource.Color.baralternate_color);
var colors = new Color[dcnt];
for (float i = 0; i < dcnt; i++)
{
colors[(int)i] = new Color(MakeColor(refcolor.R, i / dcnt), MakeColor(refcolor.G, i / dcnt), MakeColor(refcolor.B, i / dcnt));
}
colors = colors.Reverse().ToArray();
//set max value of y-axis
MRenderer.YAxisMax = day.TotalAmount.ToSingle() < 500 ? 500 : day.TotalAmount.ToSingle();
Renderer.YAxisMax = day.TotalAmount.ToSingle() < 500 ? 500 : day.TotalAmount.ToSingle();
if (Math.Abs(yMin - yMax) < 1.0f)
{
yMax = yMin < yMax ? yMin + 1.0f : yMin - 1.0f;
}
var startPoint = yMin;
var avg = yMax - yMin;
int c = 0;
foreach (var item in portions)
{
paint.Color = colors[c];
var currentTartgetPoint = ((avg * item) / 100) + startPoint;
canvas.DrawRect((float)Math.Round(xMin),
(float)Math.Round(startPoint), (float)Math.Round(xMax),
(float)Math.Round(currentTartgetPoint), paint);
startPoint = currentTartgetPoint;
c++;
}
}
}
protected void DrawCustomBar(Canvas canvas, float xMin, float yMin, float xMax, float yMax, float halfDiffX, int seriesNr, int seriesIndex, Paint paint, FJABarChartDayModel day)
{
int scale = this.MDataset.GetSeriesAt(seriesIndex).ScaleNumber;
float startX = xMin - (float)seriesNr * halfDiffX + (float)(seriesIndex * 2) * halfDiffX;
this.drawBar(canvas, startX, yMax, startX + 2.0f * halfDiffX, yMin, scale, seriesIndex, paint, day);
}
