public ChartValueItemParam(ChartValueItem chartValueItem, ChartValueItem nextChartValueItem, ChartItem parent)
{
this.ChartValueItem = chartValueItem;
this.NextChartValueItem = nextChartValueItem;
this.Color = parent.Color.ToSKColor();
this.Parent = parent;
}
public static IList <ChartValueItemParam> GetChartValueItemFromX(this IList <ChartItem> chartItems, float xPosition, SKRect frame, int maxItems, bool takeClosest = true)
{
var items = new List <ChartValueItemParam>();
if (chartItems?.Any(x => x.IsVisible) != true)
{
return(items);
}
foreach (var chartEntry in chartItems.Where(x => x.Items?.Any() == true && x.IsVisible))
{
ChartValueItem item = null;
if (!takeClosest)
{
// Create a bound and get item inside this bound
foreach (var valueItem in chartEntry.Items)
{
SKRect rect = new SKRect((xPosition - (frame.GetItemWidth(maxItems) / 2)), 0, (xPosition + (frame.GetItemWidth(maxItems) / 2)), frame.Bottom + 2);
if (rect.Contains(valueItem.Point))
{
item = valueItem;
}
}
}
else
{
// Order list and takes the first that's lower then X value
item = chartEntry.Items.OrderByDescending(c => c.Point.X).FirstOrDefault(c => c.Point.X <= xPosition);
}
// No item found so check if we touched left of the frame
if (item == null)
{
item = chartEntry.Items.FirstOrDefault();
if ((xPosition <= frame.Left && item.Point.X == frame.Left))
{
items.Add(new ChartValueItemParam(item, null, chartEntry));
}
continue;
}
// Get the index of the found item
int index = chartEntry.Items.IndexOf(item);
// It's the last item in the list so add just the this entry
if (index + 1 >= chartEntry.Items.Count)
{
if ((xPosition >= frame.Right && item.Point.X == frame.Right) || item.Point.X >= (xPosition - (frame.GetItemWidth(maxItems) / 2)))
{
items.Add(new ChartValueItemParam(item, null, chartEntry));
}
continue;
}
// Takes the next item in the list
var nextItem = chartEntry.Items[index + 1];
if (item != null)
{
// Add current item, next item and parents line color
items.Add(new ChartValueItemParam(item, nextItem, chartEntry));
}
}
return(items);
}
