protected override void UpdateCore()
{
if (DataSource == null)
{
return;
}
if (Plotter == null)
{
return;
}
Rect output = Viewport.Output;
var transform = GetTransform();
if (filteredPoints == null || !(transform.DataTransform is IdentityTransform))
{
IEnumerable <Point> points = GetPoints();
var bounds = BoundsHelper.GetViewportBounds(points, transform.DataTransform);
Viewport2D.SetContentBounds(this, bounds);
// getting new value of transform as it could change after calculating and setting content bounds.
transform = GetTransform();
List <Point> transformedPoints = transform.DataToScreenAsList(points);
// Analysis and filtering of unnecessary points
filteredPoints = new FakePointList(FilterPoints(transformedPoints),
output.Left, output.Right);
if (ProvideVisiblePoints)
{
List <Point> viewportPointsList = new List <Point>(transformedPoints.Count);
if (transform.DataTransform is IdentityTransform)
{
viewportPointsList.AddRange(points);
}
else
{
var viewportPoints = points.DataToViewport(transform.DataTransform);
viewportPointsList.AddRange(viewportPoints);
}
SetVisiblePoints(this, new ReadOnlyCollection <Point>(viewportPointsList));
}
Offset = new Vector();
}
else
{
double left = output.Left;
double right = output.Right;
double shift = Offset.X;
left -= shift;
right -= shift;
filteredPoints.SetXBorders(left, right);
}
}
protected override void UpdateCore()
{
if (DataSource == null)
{
return;
}
Rect output = Viewport.Output;
var transform = GetTransform();
if (filteredPoints == null || !(transform.DataTransform is IdentityTransform))
{
IEnumerable <Point> points = GetPoints();
ContentBounds = BoundsHelper.GetViewportBounds(points, transform.DataTransform);
transform = GetTransform();
List <Point> transformedPoints = transform.DataToScreen(points);
// Analysis and filtering of unnecessary points
filteredPoints = new FakePointList(FilterPoints(transformedPoints),
output.Left, output.Right);
Offset = new Vector();
}
else
{
double left = output.Left;
double right = output.Right;
double shift = Offset.X;
left -= shift;
right -= shift;
filteredPoints.SetXBorders(left, right);
}
}
/* FakePointList filteredMarkerPoints;//标记点在屏幕上显示的位置*/
protected override void UpdateCore()
{
if (DataSource == null)
{
return;
}
if (Plotter == null)
{
return;
}
Rect output = Viewport.Output;
var transform = GetTransform();
if (filteredPoints == null || !(transform.DataTransform is IdentityTransform))
{
IEnumerable <Point> points = GetPoints();//实际值
Point[] ps = points.ToArray <Point>();
/* List<Point> ps=points.ToList<Point>();
* List<Point> pps = new List<Point>();
* if (myPointMarkers != null)
* {
* foreach (MyPointMarker mp in myPointMarkers)
* {
* Point point = ps.Find(
* delegate(Point p)
* {
* return p.X == mp.x;
* });
* pps.Add(point);
* }
* }*/
var bounds = BoundsHelper.GetViewportBounds(points, transform.DataTransform);
Viewport2D.SetContentBounds(this, bounds);
// getting new value of transform as it could change after calculating and setting content bounds.
transform = GetTransform();
List <Point> transformedPoints = transform.DataToScreenAsList(points);//屏幕上显示值
/*List<Point> transformedMarkerPoints = transform.DataToScreenAsList(pps);*/
// Analysis and filtering of unnecessary points,
// 分析和过滤不必要的点
filteredPoints = new FakePointList(FilterPoints(transformedPoints),
output.Left, output.Right);//过滤超出屏幕的点
/*filteredMarkerPoints = new FakePointList(FilterPoints(transformedMarkerPoints), output.Left, output.Right);*/
if (ProvideVisiblePoints)
{
List <Point> viewportPointsList = new List <Point>(transformedPoints.Count);
if (transform.DataTransform is IdentityTransform)
{
viewportPointsList.AddRange(points);
}
else
{
var viewportPoints = points.DataToViewport(transform.DataTransform);
viewportPointsList.AddRange(viewportPoints);
}
SetVisiblePoints(this, new ReadOnlyCollection <Point>(viewportPointsList));
}
Offset = new Vector();
}
else
{
double left = output.Left;
double right = output.Right;
double shift = Offset.X;
left -= shift;
right -= shift;
filteredPoints.SetXBorders(left, right);
}
}
