using System;
using System.Drawing;
namespace Netron.Diagramming.Core {
  /// <summary>
  /// ICommand implementation of the AddShape action
  /// </summary>
  public class AddShapeCommand : Command {
    #region Fields
    IShape shape;
    Point location;
    #endregion

    #region Properties
    public IShape Shape {
      get { return shape; }
    }
    #endregion



    #region Methods
    /// <summary>
    /// Initializes a new instance of the <see cref="T:AddShapeCommand"/> class.
    /// </summary>
    /// <param name="controller">The controller.</param>
    /// <param name="shape">The shape.</param>
    /// <param name="location">The location.</param>
    public AddShapeCommand(
        IController controller,
        IShape shape,
        Point location)
      : base(controller) {
      if (shape == null)
        throw new ArgumentNullException("The shape is 'null' and cannot be inserted.");
      this.Text = "Add " + shape.EntityName;

      this.location = location;
      this.shape = shape;
    }

    /// <summary>
    /// Perform redo of this command.
    /// </summary>
    public override void Redo() {
      Controller.Model.AddShape(shape);

      shape.Transform(location.X, location.Y, shape.Width, shape.Height);
      Rectangle rec = shape.Rectangle;
      rec.Inflate(20, 20);
      Controller.View.Invalidate(rec);
    }

    /// <summary>
    /// Perform undo of this command.
    /// </summary>
    public override void Undo() {
      Rectangle rec = shape.Rectangle;
      rec.Inflate(20, 20);
      Controller.Model.RemoveShape(shape);

      Controller.View.Invalidate(rec);

    }

    #endregion

  }

}