protected void ShowSliderValuesPosition(SKCanvas canvas, SKRect frame)
{
if (!IsSliderVisible)
{
return;
}
var valueItems = ChartEntries.GetChartValueItemFromX(TouchedPoint.X, frame, MaxItems);
if (valueItems?.Any() != true)
{
return;
}
int index = 0;
foreach (var item in valueItems)
{
canvas.DrawSliderCircle(item.ChartValueItem.Point.X, item.ChartValueItem.Point.Y, item.Color, this.SliderPointSize);
string text = Math.Round(double.Parse(item.ChartValueItem.Value.ToString()), 0, MidpointRounding.AwayFromZero).ToString() + " " + this.VerticalUnit;
canvas.DrawSliderValue(
text,
frame.GetInsideXValue(TouchedPoint.X),
frame.Top,
SliderDetailTextSize,
SKColors.White,
item.Color,
SliderDetailPadding,
SliderDetailMargin,
MaxValue + " " + this.VerticalUnit,
valueItems.Count,
index,
SliderDetailOrientation,
frame,
item.Parent?.UseDashedEffect == true);
index++;
}
}
protected void ShowExactSliderValuesPosition(SKCanvas canvas, SKRect frame)
{
if (!IsSliderVisible)
{
return;
}
var valueItems = ChartEntries.GetChartValueItemFromX(TouchedPoint.X, frame, MaxItems);
if (valueItems?.Any() != true)
{
return;
}
int index = 0;
foreach (var item in valueItems)
{
var chartEntry = item.ChartValueItem;
var nextChartEntry = item.NextChartValueItem;
float y, points;
if (nextChartEntry != null)
{
// Difference in value
var diffVal = nextChartEntry.Value - chartEntry.Value;
// Difference in Y position
var diffY = nextChartEntry.Point.Y - chartEntry.Point.Y;
// Difference in X position
var diffX = nextChartEntry.Point.X - chartEntry.Point.X;
var yValue = diffVal / diffY;
var xValue = diffVal / diffX;
// Current X position over first item
var x = TouchedPoint.X - chartEntry.Point.X;
points = x * xValue;
y = (points / yValue) + chartEntry.Point.Y;
}
else
{
y = chartEntry.Point.Y;
points = chartEntry.Value;
}
canvas.DrawSliderCircle(frame.GetInsideXValue(TouchedPoint.X), y, item.Color, SliderPointSize);
float currentVal = 0;
if (nextChartEntry != null)
{
try
{
currentVal = chartEntry.Value + (int)Math.Round(decimal.Parse(points.ToString()), 0, MidpointRounding.AwayFromZero);
}
catch (Exception ex)
{
ex.Print();
}
if (TouchedPoint.X == chartEntry.Point.X)
{
currentVal = chartEntry.Value;
}
else if (TouchedPoint.X == nextChartEntry?.Point.X)
{
currentVal = nextChartEntry.Value;
}
}
else
{
currentVal = chartEntry.Value;
}
string text = currentVal.ToString() + " " + this.VerticalUnit;
canvas.DrawSliderValue(
text,
frame.GetInsideXValue(TouchedPoint.X),
frame.Top,
SliderDetailTextSize,
SKColors.White,
item.Color,
SliderDetailPadding,
SliderDetailMargin,
MaxValue + " " + VerticalUnit,
valueItems.Count,
index,
SliderDetailOrientation,
frame,
item.Parent?.UseDashedEffect == true);
index++;
}
}