private void DrawBars(SKCanvas canvas, SKRect frame, SKRect chart)
{
var itemWidth = (MaxItems >= 12 ? chart.GetItemWidth(MaxItems) : chart.GetItemWidth(12)) / 2;
var count = ChartEntries.Count(x => x.IsVisible);
// Regular bar width
var barWidth = (itemWidth / count) - 10;
// Selected bar width
var selectedValueItems = ChartEntries.GetChartValueItemFromX(chart.GetInsideXValue(TouchedPoint.X), chart, MaxItems, false);
var selectedTags = selectedValueItems?.Select(x => x.ChartValueItem.Tag);
int index = 0;
foreach (var item in ChartEntries.Where(x => x.IsVisible))
{
foreach (var valueItem in item.Items.Where(x => selectedTags?.Contains(x.Tag) != true))
{
// Draw not selected bars //
canvas.DrawBar(
valueItem.Point.X,
valueItem.Point.Y,
chart.Bottom,
barWidth,
BarMargin,
count,
index,
IsSliderVisible ? item.Color.ToSKColor().AsTransparency() : item.Color.ToSKColor(),
item.UseDashedEffect);
}
index++;
}
if (!IsSliderVisible)
{
return;
}
count = selectedValueItems?.Count() ?? 1;
barWidth = (itemWidth / selectedValueItems?.Count() ?? 1) + 10;
index = 0;
foreach (var item in ChartEntries.Where(x => x.IsVisible))
{
var valueItems = item.Items.Where(x => selectedTags?.Contains(x.Tag) == true);
if (valueItems?.Any() != true)
{
continue;
}
foreach (var valueItem in valueItems)
{
canvas.DrawBar(
valueItem.Point.X,
valueItem.Point.Y,
chart.Bottom,
barWidth,
BarMargin,
count,
index,
item.Color.ToSKColor(),
item.UseDashedEffect);
string text = Math.Round(double.Parse(valueItem.Value.ToString()), 0, MidpointRounding.AwayFromZero).ToString() + " " + this.VerticalUnit;
canvas.DrawSliderValue(
text,
frame.GetInsideXValue(valueItem.Point.X),
frame.Top,
SliderDetailTextSize,
SKColors.White,
item.Color.ToSKColor(),
SliderDetailPadding,
SliderDetailMargin,
MaxValue + " " + this.VerticalUnit,
selectedValueItems.Count,
index,
SliderDetailOrientation,
frame,
item.UseDashedEffect);
}
index++;
}
float hintX = selectedValueItems?.FirstOrDefault()?.ChartValueItem?.Point.X ?? 0;
float hintY = selectedValueItems?.OrderByDescending(x => x.ChartValueItem.Point.Y)?.FirstOrDefault()?.ChartValueItem?.Point.Y ?? 0;
if (hintX != 0 && hintY != 0)
{
DrawDragHintGraphic(
canvas,
hintX,
hintY + ((frame.Bottom - hintY) / 2),
(barWidth * count),
frame);
}
}
