internal SnapPointGraphic()
{
_circle = new InvariantEllipsePrimitive();
_circle.Color = Color.Tomato;
_circle.InvariantTopLeft = new PointF(-6, -6);
_circle.InvariantBottomRight = new PointF(6, 6);
this.Graphics.Add(_circle);
}
private static IGraphic CreatePoint(PointF location)
{
const float radius = 4;
var point = new InvariantEllipsePrimitive();
point.Location = location;
point.InvariantTopLeft = new PointF(-radius, -radius);
point.InvariantBottomRight = new PointF(radius, radius);
return(point);
}
/// <summary> /// Draws a <see cref="InvariantEllipsePrimitive"/>. Must be overridden and implemented. /// </summary> protected abstract void DrawInvariantEllipsePrimitive(InvariantEllipsePrimitive ellipse);
/// <summary>
/// Draws a <see cref="InvariantEllipsePrimitive"/>.
/// </summary>
protected override void DrawInvariantEllipsePrimitive(InvariantEllipsePrimitive ellipse)
{
InternalDrawEllipsePrimitive(ellipse);
}
protected virtual void DrawInvariantEllipsePrimitive(InvariantEllipsePrimitive ellipse)
{
GdiRenderer.DrawEllipsePrimitive(Surface.OverlayBuffer, _pen, ellipse, Dpi);
}
/// <summary>
/// Draws a <see cref="InvariantEllipsePrimitive"/>.
/// </summary>
protected override void DrawInvariantEllipsePrimitive(InvariantEllipsePrimitive ellipse)
{
DrawEllipsePrimitive(Surface.FinalBuffer, _pen, ellipse, Dpi);
}
