/// <summary>
/// Initializes a new instance of the <see cref="ColumnDefinitionCollection"/> class.
/// </summary>
/// <param name="grid">The <see cref="Grid"/> that owns the collection.</param>
internal ColumnDefinitionCollection(Grid grid)
{
Contract.Require(grid, nameof(grid));
this.grid = grid;
this.implicitColumn = new ColumnDefinition() { Grid = grid, Width = new GridLength(1.0, GridUnitType.Star) };
this.implicitStorage.Add(implicitColumn);
}
/// <summary>
/// Gets a value indicating whether the collection contains the specified column.
/// </summary>
/// <param name="definition">The column to evaluate.</param>
/// <returns><c>true</c> if the collection contains the specified column; otherwise, <c>false</c>.</returns>
public Boolean Contains(ColumnDefinition definition)
{
Contract.Require(definition, "definition");
if (storage.Count == 0)
{
return definition == implicitColumn;
}
return storage.Contains(definition);
}
/// <summary>
/// Adds a column to the collection.
/// </summary>
/// <param name="definition">The column definition to add to the collection.</param>
public void Add(ColumnDefinition definition)
{
Contract.Require(definition, "definition");
if (definition.Grid != null)
definition.Grid.ColumnDefinitions.Remove(definition);
definition.Grid = grid;
storage.Add(definition);
OnModified();
}
/// <summary>
/// Removes a column from the collection.
/// </summary>
/// <param name="definition">The column to remove from the collection.</param>
/// <returns><c>true</c> if the specified column was removed from the collection; otherwise, <c>false</c>.</returns>
public Boolean Remove(ColumnDefinition definition)
{
Contract.Require(definition, "definition");
if (storage.Remove(definition))
{
definition.Grid = null;
OnModified();
return true;
}
return false;
}
