public void Dispose()
{
SKRect rc;
_path.GetBounds(out rc);
_geometryImpl.Bounds = rc.ToAvaloniaRect();
}
public GlobularTextPage()
{
Title = "Globular Text";
canvasView = new SKCanvasView();
canvasView.PaintSurface += OnCanvasViewPaintSurface;
Content = canvasView;
using (SKPaint textPaint = new SKPaint())
{
textPaint.Typeface = SKTypeface.FromFamilyName("Times New Roman");
textPaint.TextSize = 100;
using (SKPath textPath = textPaint.GetTextPath("HELLO", 0, 0))
{
SKRect textPathBounds;
textPath.GetBounds(out textPathBounds);
globePath = textPath.CloneWithTransform((SKPoint pt) =>
{
double longitude = (Math.PI / textPathBounds.Width) * (pt.X - textPathBounds.Left) - Math.PI / 2;
double latitude = (Math.PI / textPathBounds.Height) * (pt.Y - textPathBounds.Top) - Math.PI / 2;
longitude *= 0.75;
latitude *= 0.75;
float x = (float)(Math.Cos(latitude) * Math.Sin(longitude));
float y = (float)Math.Sin(latitude);
return(new SKPoint(x, y));
});
}
}
}
public CanvasRectangleF GetBounds()
{
SKRect rect;
_path.GetBounds(out rect);
return(rect.ToCanvasRectangleF());
}
public ChildNode(IBaseShape shape, string styleId, double dx, double dy, double scale, SKPath geometry)
{
this.Shape = shape;
this.StyleId = styleId;
this.dX = dx;
this.dY = dy;
this.Scale = scale;
this.Geometry = geometry;
geometry.GetBounds(out this.Bounds);
}
public void GetBounds(out SKRect outBounds, Matrix3X3 parentMatrix)
{
_path.Reset();
for (var i = 0; i < _paths.Count; i++)
{
var m = parentMatrix.ToSKMatrix();
_path.AddPath(_paths[i].Path, ref m);
}
_path.GetBounds(out outBounds);
// Add padding to account for rounding errors.
RectExt.Set(ref outBounds, outBounds.Left - 1, outBounds.Top - 1, outBounds.Right + 1, outBounds.Bottom + 1);
}
protected override void OnDrawSample(SKCanvas canvas, int width, int height)
{
canvas.Clear(SKColors.White);
canvas.Scale(2, 2);
using (SKPaint paint = new SKPaint())
using (SKPaint textPaint = new SKPaint())
{
paint.Style = SKPaintStyle.Stroke;
paint.StrokeWidth = 1;
paint.IsAntialias = true;
paint.StrokeCap = SKStrokeCap.Round;
textPaint.IsAntialias = true;
using (SKPath path = new SKPath())
{
path.MoveTo(-6.2157825e-7f, -25.814698f);
path.RCubicTo(-34.64102137842175f, 19.9999998f, 0f, 40f, 0f, 40f);
path.Offset(50, 35);
// draw using GetBounds
paint.Color = SampleMedia.Colors.XamarinLightBlue;
canvas.DrawPath(path, paint);
SKRect rect;
path.GetBounds(out rect);
paint.Color = SampleMedia.Colors.XamarinDarkBlue;
canvas.DrawRect(rect, paint);
canvas.DrawText("Bounds", rect.Left, rect.Bottom + paint.TextSize + 10, textPaint);
// move for next curve
path.Offset(100, 0);
// draw using GetTightBounds
paint.Color = SampleMedia.Colors.XamarinLightBlue;
canvas.DrawPath(path, paint);
path.GetTightBounds(out rect);
paint.Color = SampleMedia.Colors.XamarinDarkBlue;
canvas.DrawRect(rect, paint);
canvas.DrawText("TightBounds", rect.Left, rect.Bottom + paint.TextSize + 10, textPaint);
}
}
}
public void Dispose()
{
// TODO: Not sure what we need to do here. This code left here for reference.
//
// var arr = _elements.ToArray();
// SkRect rc;
// _path?.Dispose();
// _path = new SKPath(new SkPath(MethodTable.Instance.CreatePath(arr, arr.Length, out rc)));
// _geometryImpl.ApplyTransform();
// _geometryImpl.Bounds = rc.ToRect();
SKRect rc;
_path.GetBounds(out rc);
_geometryImpl.ApplyTransform();
_geometryImpl.Bounds = rc.ToPerspexRect();
}
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear(SKColors.Black);
SKRect bounds;
catPath.GetBounds(out bounds);
canvas.Translate(info.Width / 2, info.Height / 2);
canvas.Scale(0.9f * Math.Min(info.Width / bounds.Width,
info.Height / bounds.Height));
canvas.Translate(-bounds.MidX, -bounds.MidY);
canvas.DrawPath(catPath, paint);
}
