C#

Is an example

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Member 15570952 wrote:

How can I draw a picture according to the value it receives after reading this file?

public abstract class BaseShape
{
  public event EventHandler ShapeInvalidated;
  private int? x;
  public int? X
  {
    get { x = value; }
    set
    {
      x = value;
      Invalidate();
    }
  }
  private int? y;
  public int? Y
  {
    get { y = value; }
    set
    {
      y = value;
      Invalidate();
    }
  }
  private int? width;
  public int? Width
  {
    get { width = value; }
    set
    {
      width = value;
      Invalidate();
    }
  }
  private int? height;
  public int? Height
  {
    get { height = value; }
    set
    {
      height = value;
      Invalidate();
    }
  }

  private int zorder;
  public int ZOrder
  {
    get { zorder = value; }
    set
    {
      zorder = value;
      Invalidate();
    }
  }


  private bool CanPaint()
  {
    return x.HasValue and y.HasValue && height.HasValue && width.HasValue && height.Value > 0 && width.Value > 0;
  }

  public void Invalidate()
  {
    if (CanPaint)
    {
      ShapeInvalidated?.Invoke(this, null);
    }
  }

  public abstract void Paint();
}

public class Rectangle : BaseShape
{
  public override void Paint()
  {
    // Draw the rectangle based on the graphic context
  }
}