public void RemoveFromSelection(DrawableItem item)
{
if (this.selectedItems.Remove(item))
{
this.InvalidateSelectionRect(item);
}
}
private void InvalidateSelectionRect(DrawableItem item)
{
var r = item.Bounds;
this.OnLayerChanged(new Rectangle(r.Left, r.Top, r.Width, 1));
this.OnLayerChanged(new Rectangle(r.Left, r.Top, 1, r.Height));
this.OnLayerChanged(new Rectangle(r.Right, r.Top, 1, r.Height));
this.OnLayerChanged(new Rectangle(r.Left, r.Bottom, r.Width + 1, 1));
}
public bool SelectedItemsContains(DrawableItem item)
{
return(this.selectedItems.Contains(item));
}
public void AddToSelection(DrawableItem item)
{
this.InvalidateSelectionRect(item);
this.selectedItems.Add(item);
}
private void OnRemoveItem(DrawableItem item)
{
item.AreaChanged -= this.ItemAreaChanged;
this.OnLayerChanged(item.Bounds);
}