/// <summary>
/// Event-handler for when a Thing is added to the PigWorld.
/// </summary>
public void WorldThingAddedEvent(Thing thing)
{
if (thing is LifeForm)
{
Position position = thing.Cell.Position;
LifeFormView view = (LifeFormView)CreateView(thing);
cellViews[position.Row, position.Column].AddLifeFormView(view);
}
}
/// <summary>
/// Removes a LifeFormView from this CellView.
/// This happens when a LifeForm is removed from the Cell, either by the user,
/// or when an animal moves from one cell to another.
/// </summary>
/// <param name="view"> the LifeFormView to remove. </param>
public void RemoveLifeForm()
{
// When the life-form changes or is destroyed, no longer tell this CellView about it.
this.lifeFormView.LifeForm.thingChangedEvent -= ThingChangedEvent;
this.lifeFormView.LifeForm.thingDestroyedEvent -= ThingDestroyedEvent;
this.lifeFormView = null;
this.Image = null;
this.ContextMenuStrip = null; // Remove the context-menu.
}
/// <summary>
/// Adds a LifeFormView to this CellView.
/// This happens when a LifeForm is added to a Cell, either by the user,
/// or when an animal moves from one cell to another.
/// </summary>
/// <param name="view"> the LifeFormView to add. </param>
public void AddLifeFormView(LifeFormView lifeFormView)
{
// Check that the cell has no life-form already. (It may have nonLivingThings, e.g. pig food.)
Debug.Assert(this.lifeFormView == null);
this.lifeFormView = lifeFormView;
// Update this cell's image.
this.Image = lifeFormView.PaintImage();
// If the life-form changes or is destroyed, tell this CellView about it.
this.lifeFormView.LifeForm.thingChangedEvent += ThingChangedEvent;
this.lifeFormView.LifeForm.thingDestroyedEvent += ThingDestroyedEvent;
this.ContextMenuStrip = this.lifeFormView.contextMenuStrip; // Assign the context-menu to this CellView.
}