/// <summary>
/// Gets whether the command can be executed. Ensures that there is a bookmark to delete.
/// </summary>
/// <param name="parameter">The bookmark to delete</param>
/// <returns>Returns true if there is a bookmark to delete and it belongs to the <see cref="Bookmarks"/> collection</returns>
public bool CanExecute(object parameter)
{
// Make sure the bookmarks collection is initialized and that the
// passed-in bookmark is in the collection
Bookmark.MapBookmark bookmark = parameter as Bookmark.MapBookmark;
return(Bookmarks != null && bookmark != null && Bookmarks.Contains(bookmark));
}
#pragma warning restore 67
/// <summary>
/// Deletes the bookmark passed as the parameter.
/// </summary>
/// <param name="parameter">Utilizes the DataContextProxy via Binding on the DeleteBookmark button
/// to specify the bookmark to delete.</param>
public void Execute(object parameter)
{
if (!CanExecute(parameter))
{
throw new ArgumentException(Strings.CannotDeleteBookmarkError);
}
Bookmark.MapBookmark bookmark = parameter as Bookmark.MapBookmark;
Bookmarks.Remove(bookmark);
}
