protected override IEnumerable <double> GetXValues()
{
DataRect visible = DataSource2dContext.GetVisibleRect(this);
yield return(visible.XMin);
yield return(visible.XMax);
}
internal IEnumerable <Point> Filter(IEnumerable <Point> points, Viewport2D viewport)
{
var screenRect = viewport.Output;
var visibleRect = viewport.Visible;
foreach (var filter in Items)
{
DependencyObject dependencyObject = filter as DependencyObject;
if (dependencyObject != null)
{
DataSource2dContext.SetScreenRect(dependencyObject, screenRect);
DataSource2dContext.SetVisibleRect(dependencyObject, visibleRect);
}
points = filter.Filter(points);
}
return(points);
}
protected override IEnumerable <double> GetXValues()
{
var visible = DataSource2dContext.GetVisibleRect(this);
var screen = DataSource2dContext.GetScreenRect(this);
int count = (int)Math.Ceiling(screen.Width) + 1;
if (count == 0)
{
yield break;
}
else
{
double delta = visible.Width / count;
double x = (int)(visible.XMin / delta - 1) * delta;
for (int i = 0; i < count; i++)
{
yield return(x + i * delta);
}
}
}
public static IEnumerable <Point> GetPoints(IPointDataSource dataSource, DependencyObject context)
{
if (dataSource == null)
{
yield break;
}
if (context == null)
{
context = new DataSource2dContext();
}
using (IPointEnumerator enumerator = dataSource.GetEnumerator(context))
{
Point p = new Point();
while (enumerator.MoveNext())
{
enumerator.GetCurrent(ref p);
yield return(p);
p = new Point();
}
}
}
