inabox/InABox.Avalonia/Components/ImageEditor/Objects/RectangleObject.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.Shapes;
using Avalonia.Media;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace InABox.Avalonia.Components.ImageEditing;

internal class RectangleObject : IImageEditorObject
{
    public IBrush? PrimaryBrush { get; set; }

    public IBrush? SecondaryBrush { get; set; }

    public double Thickness { get; set; } = 1.0;

    public Point Point1 { get; set; }

    public Point Point2 { get; set; }

    private Rectangle Control = new();

    public Control GetControl() => Control;

    public void Update()
    {
        Control.Stroke = PrimaryBrush;
        Control.Fill = SecondaryBrush;
        Control.StrokeThickness = Thickness;

        var topLeft = new Point(
            Math.Min(Point1.X, Point2.X),
            Math.Min(Point1.Y, Point2.Y));

        Canvas.SetLeft(Control, topLeft.X);
        Canvas.SetTop(Control, topLeft.Y);
        Control.Width = Math.Abs(Point2.X - Point1.X);
        Control.Height = Math.Abs(Point2.Y - Point1.Y);
    }
}