/// <summary>
/// Draws an ellipse
/// </summary>
/// <param name="frame"></param>
/// <param name="pen"></param>
/// <param name="brush"></param>
public void DrawEllipse(Rect frame, Pen pen = null, NGraphics.Brush brush = null)
{
var ellipseEl = new Windows.UI.Xaml.Shapes.Ellipse();
var offset = pen != null ? pen.Width : 0.0;
ellipseEl.Width = frame.Width + offset;
ellipseEl.Height = frame.Height + offset;
if (brush != null)
{
ellipseEl.Fill = GetBrush(brush);
}
if (pen != null)
{
ellipseEl.Stroke = GetStroke(pen);
ellipseEl.StrokeThickness = pen.Width;
}
ellipseEl.RenderTransform = Conversions.GetTransform(CurrentTransform);
_canvas.Children.Add(ellipseEl);
Canvas.SetLeft(ellipseEl, frame.X - offset / 2.0);
Canvas.SetTop(ellipseEl, frame.Y - offset / 2.0);
}
/// <summary>
/// Draws a path
/// </summary>
/// <param name="ops"></param>
/// <param name="pen"></param>
/// <param name="brush"></param>
public void DrawPath(IEnumerable <PathOp> ops, Pen pen = null, NGraphics.Brush brush = null)
{
if (pen == null && brush == null)
{
return;
}
var pathEl = new Windows.UI.Xaml.Shapes.Path();
if (brush != null)
{
pathEl.Fill = GetBrush(brush);
}
if (pen != null)
{
pathEl.Stroke = GetStroke(pen);
pathEl.StrokeThickness = pen.Width;
}
var geo = new StringBuilder();
foreach (var op in ops)
{
var mt = op as MoveTo;
if (mt != null)
{
geo.AppendFormat(CultureInfo.InvariantCulture, " M {0},{1}", mt.Point.X, mt.Point.Y);
continue;
}
var lt = op as LineTo;
if (lt != null)
{
geo.AppendFormat(CultureInfo.InvariantCulture, " L {0},{1}", lt.Point.X, lt.Point.Y);
continue;
}
var at = op as ArcTo;
if (at != null)
{
var p = at.Point;
var r = at.Radius;
geo.AppendFormat(CultureInfo.InvariantCulture, " A {0},{1} 0 {2} {3} {4},{5}",
r.Width, r.Height,
at.LargeArc ? 1 : 0,
at.SweepClockwise ? 1 : 0,
p.X, p.Y);
continue;
}
var ct = op as CurveTo;
if (ct != null)
{
var p = ct.Point;
var c1 = ct.Control1;
var c2 = ct.Control2;
geo.AppendFormat(CultureInfo.InvariantCulture, " C {0},{1} {2},{3} {4},{5}",
c1.X, c1.Y, c2.X, c2.Y, p.X, p.Y);
continue;
}
var cp = op as ClosePath;
if (cp != null)
{
geo.Append(" z");
continue;
}
}
// Convert path string to geometry
var b = new Binding {
Source = geo.ToString()
};
BindingOperations.SetBinding(pathEl, Windows.UI.Xaml.Shapes.Path.DataProperty, b);
pathEl.RenderTransform = Conversions.GetTransform(CurrentTransform);
_canvas.Children.Add(pathEl);
}