private void Touch_move(float x, float y)
{
float dx = Math.Abs(x - mX);
float dy = Math.Abs(y - mY);
if (!(dx >= TouchTolerance) && !(dy >= TouchTolerance))
{
return;
}
mPath.QuadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);
mX = x;
mY = y;
}
protected override void OnDraw(Canvas canvas)
{
var trans = Element.RenderTransform ?? new IdentityTransform();
var path = new global::Android.Graphics.Path();
foreach (var command in PathDataParser.ToAbsolute(PathDataParser.Parse(Element.Data)))
{
switch (command.Type)
{
case PathDataParser.CommandType.MoveTo:
{
var pt = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[0], command.Arguments[1]));
path.MoveTo(pt.X, pt.Y);
}
break;
case PathDataParser.CommandType.LineTo:
{
var pt = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[0], command.Arguments[1]));
path.LineTo(pt.X, pt.Y);
}
break;
case PathDataParser.CommandType.QBezier:
{
var pt = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[0], command.Arguments[1]));
var pt2 = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[2], command.Arguments[3]));
path.QuadTo(pt.X, pt.Y, pt2.X, pt2.Y);
}
break;
case PathDataParser.CommandType.Bezier:
{
var pt = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[0], command.Arguments[1]));
var pt2 = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[2], command.Arguments[3]));
var pt3 = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[4], command.Arguments[5]));
path.CubicTo(pt.X, pt.Y, pt2.X, pt2.Y, pt3.X, pt3.Y);
}
break;
case PathDataParser.CommandType.Close:
path.Close();
DrawPath(canvas, path);
path = new global::Android.Graphics.Path();
break;
}
}
if (!path.IsEmpty)
{
DrawPath(canvas, path);
}
}