private void UpdateView(IEnumerable value)
{
// NOTE : We need to clear the SortDescription before
// clearing the InnerGrid.Columns so that the Adorners
// are appropriately cleared.
InnerListColumn sortedColumn = this.SortedColumn;
this.ClearSort();
// Release the current inner grid \\
this.ReleaseInnerGridReferences();
if (this.AutoGenerateColumns)
{
this.innerGrid = new InnerListGridView();
// PopulateColumns deals with a null newEnumerable
this.innerGrid.PopulateColumns(value);
}
else
{
this.innerGrid = new InnerListGridView(this.Columns);
}
this.View = this.innerGrid;
this.SetColumnHeaderActions();
if (null != sortedColumn && this.Columns.Contains(sortedColumn))
{
this.ApplySort(sortedColumn, false);
}
}
/// <summary>
/// Called when the ItemsSource changes to set internal fields, subscribe to the view change
/// and possibly autopopulate columns.
/// </summary>
/// <param name="oldValue">Previous ItemsSource.</param>
/// <param name="newValue">Current ItemsSource.</param>
protected override void OnItemsSourceChanged(System.Collections.IEnumerable oldValue, System.Collections.IEnumerable newValue)
{
base.OnItemsSourceChanged(oldValue, newValue);
this.itemsSourceIsEmpty = (null != this.ItemsSource && false == this.ItemsSource.GetEnumerator().MoveNext());
// A view can be created if there is data to auto-generate columns, or columns are added programatically \\
bool canCreateView = (null != this.ItemsSource) &&
(false == this.itemsSourceIsEmpty || false == this.AutoGenerateColumns);
if (canCreateView)
{
this.UpdateViewAndCollectionView(this.ItemsSource);
// If there are items, select the first item now \\
this.SelectedIndex = this.itemsSourceIsEmpty ? -1 : 0;
}
else
{
// Release the current inner grid \\
this.ReleaseInnerGridReferences();
// clean up old state if can not set the state.
this.SetCollectionView(null);
this.innerGrid = null;
this.View = null;
}
}
/// <summary>
/// Called when the View property is changed.
/// </summary>
/// <param name="obj">InnerList whose property is being changed.</param>
/// <param name="e">Event arguments.</param>
private static void InnerList_OnViewChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
InnerList thisList = (InnerList)obj;
GridView newGrid = e.NewValue as GridView;
InnerListGridView innerGrid = e.NewValue as InnerListGridView;
if (newGrid != null && innerGrid == null)
{
throw new NotSupportedException(String.Format(
CultureInfo.InvariantCulture,
InvariantResources.ViewSetWithType,
typeof(GridView).Name,
typeof(InnerListGridView).Name));
}
((InnerList)obj).innerGrid = innerGrid;
}
private void UpdateView(IEnumerable value)
{
// NOTE : We need to clear the SortDescription before
// clearing the InnerGrid.Columns so that the Adorners
// are appropriately cleared.
InnerListColumn sortedColumn = this.SortedColumn;
this.ClearSort();
// Release the current inner grid \\
this.ReleaseInnerGridReferences();
if (this.AutoGenerateColumns)
{
this.innerGrid = new InnerListGridView();
// PopulateColumns deals with a null newEnumerable
this.innerGrid.PopulateColumns(value);
}
else
{
this.innerGrid = new InnerListGridView(this.Columns);
}
this.View = this.innerGrid;
this.SetColumnHeaderActions();
if (null != sortedColumn && this.Columns.Contains(sortedColumn))
{
this.ApplySort(sortedColumn, false);
}
}
/// <summary>
/// Called when the ItemsSource changes to set internal fields, subscribe to the view change
/// and possibly autopopulate columns.
/// </summary>
/// <param name="oldValue">Previous ItemsSource.</param>
/// <param name="newValue">Current ItemsSource.</param>
protected override void OnItemsSourceChanged(System.Collections.IEnumerable oldValue, System.Collections.IEnumerable newValue)
{
base.OnItemsSourceChanged(oldValue, newValue);
this.itemsSourceIsEmpty = (null != this.ItemsSource && false == this.ItemsSource.GetEnumerator().MoveNext());
// A view can be created if there is data to auto-generate columns, or columns are added programmatically \\
bool canCreateView = (null != this.ItemsSource) &&
(false == this.itemsSourceIsEmpty || false == this.AutoGenerateColumns);
if (canCreateView)
{
this.UpdateViewAndCollectionView(this.ItemsSource);
// If there are items, select the first item now \\
this.SelectedIndex = this.itemsSourceIsEmpty ? -1 : 0;
}
else
{
// Release the current inner grid \\
this.ReleaseInnerGridReferences();
// clean up old state if can not set the state.
this.SetCollectionView(null);
this.innerGrid = null;
this.View = null;
}
}
