public void UpdatePositionInData(Point mousePos, Vector screenDistance, CoordinateTransform transform)
{
Point mousePosInData = mousePos.ScreenToData(transform);
_lastMousePosInData = mousePosInData;
PositionAndCheckDistance pcd = new PositionAndCheckDistance(mousePos, screenDistance, transform);
OnNearestPointUpdated(pcd);
}
private void CheckPosAgainstData(PositionAndCheckDistance currentPos)
{
IEnumerable <(Point start, Point end, string label)> lines = null;
IEnumerable <(Point start, Point end, string label)> rectangles = null;
Dispatcher.Invoke(() =>
{
lines = NearestVisualSources.OfType <NearestLineSource>().Select(nsl => nsl.ItemsSource).Where(items => items != null).SelectMany(x => x).ToList();
rectangles = NearestVisualSources.OfType <NearestRectangleSource>().Select(nsl => nsl.ItemsSource).Where(items => items != null).SelectMany(x => x).ToList();
});
Point dataPosition = currentPos.DataPosition;
Point screenPosition = currentPos.ScreenPosition;
Point dataBottomLeft = currentPos.DataBottomLeft;
Point dataTopRight = currentPos.DataTopRight;
double?minDistance = currentPos.ScreenDistance.X;
string closestLine = null;
Point? closestScreenPoint = null;
// First see if mouse is inside one of the rectangles
foreach (var rectangle in rectangles)
{
DataRect dataRect = new DataRect(rectangle.start, rectangle.end);
if (dataRect.Contains(dataPosition))
{
minDistance = 0;
closestScreenPoint = screenPosition;
closestLine = rectangle.label;
break;
}
}
if (!closestScreenPoint.HasValue)
{
// Get the rectangle sides
var rectangleLines = rectangles.Select(rect =>
{
return(new[]
{
(rect.start, new Point(rect.start.X, rect.end.Y), rect.label),
(new Point(rect.start.X, rect.end.Y), rect.end, rect.label),
(rect.end, new Point(rect.end.X, rect.start.Y), rect.label),
(new Point(rect.end.X, rect.start.Y), rect.start, rect.label)
});
