private void ReplacePaths(Canvas canvas, IEnumerable <Infrastructure.Data.PointsSequence> sequences, bool isClosed, VGKind vgKind)
{
// remove all old paths having the same VGKind
var indicesToRemove =
(from item in canvas.Children.Cast <object>().ZipIndex()
where item.Value is Path
let path = (Path)item.Value
where GetVGKind(path) == vgKind
select item.Index
).ToArray();
Array.Reverse(indicesToRemove);
foreach (var index in indicesToRemove)
{
canvas.Children.RemoveAt(index);
}
// add new paths
if (sequences != null)
{
var paths = from pointsSequence in sequences
select CreatePath(pointsSequence, isClosed, vgKind);
foreach (var path in paths)
{
canvas.Children.Add(path);
}
}
}
private Path CreatePath(Infrastructure.Data.PointsSequence polylineData, bool isClosed, VGKind vgKind)
{
var points = (from pnt in polylineData.Points
select new Point {
X = pnt.X, Y = pnt.Y
}).ToArray();
var geometry = new StreamGeometry();
using (var context = geometry.Open())
{
context.BeginFigure(points[0], false, isClosed);
context.PolyLineTo(points.Skip(1).ToList(), true, false);
}
var scaleTransform = new ScaleTransform();
scaleTransform.Bind(ScaleTransform.ScaleXProperty, () => polyRoot.ActualWidth, width => width / 2);
scaleTransform.Bind(ScaleTransform.ScaleYProperty, () => polyRoot.ActualHeight, height => height / 2);
var translateTransform = new TranslateTransform();
translateTransform.Bind(TranslateTransform.XProperty, () => polyRoot.ActualWidth, width => width / 2);
translateTransform.Bind(TranslateTransform.YProperty, () => polyRoot.ActualHeight, height => height / 2);
var transformGroup = new TransformGroup {
Children = { scaleTransform, translateTransform }
};
geometry.Transform = transformGroup;
var path = new Path();
path.Data = geometry;
path.DataContext = polylineData;
path.Bind(Path.StrokeProperty,
() => polylineData.CurveCategory,
() => polylineData.ColorCodingIndex,
(curveCategory, colorCodingIndex) =>
{
if (colorCodingIndex != PointsSequence.INVALID_COLOR_CODING)
{
return(Constants.PRIMITIVE_CURVES_COLOR_CODING[colorCodingIndex]);
}
else
{
switch (curveCategory)
{
case CurveCategories.None:
return(SKETCH_STROKE_UNCATEGORIZED);
case CurveCategories.Feature:
return(SKETCH_STROKE_FEATURE);
case CurveCategories.Silhouette:
return(SKETCH_STROKE_SILHOUETTE);
default:
return(Binding.DoNothing);
}
}
});
path.Bind(Path.StrokeThicknessProperty,
() => polylineData.IsSelected,
() => polylineData.IsEmphasized,
() => polylineData.CurveCategory,
(isSelected, isEmphasized, curveCategory) =>
{
if (isSelected || isEmphasized)
{
return(4.0);
}
if (curveCategory == CurveCategories.Feature)
{
return(2.0);
}
return(1.0);
});
SetVGKind(path, vgKind);
return(path);
}
private static void SetVGKind(Path path, VGKind value)
{
path.SetValue(VGKindProperty, value);
}