/// <summary>
/// Expands the given item.
/// </summary>
/// <param name="item">The item.</param>
public void ExpandItem(object item)
{
if (this.DataGridOwner != null && this.IsItemExpandable(item))
{
TextBlock expander = LayoutHelper.FindVisualChild <TextBlock>(this.GetCellContent(item));
expander.Text = "-";
this.DataGridOwner.SetDetailsVisibilityForItem(item, Visibility.Visible);
if (this.RememberExpandedRows)
{
this.expandedItems.Add(item);
}
this.OnItemExpanded(item);
}
}
/// <summary>
/// Collapses the given item.
/// </summary>
/// <param name="item">The item.</param>
public void CollapseItem(object item)
{
if (this.DataGridOwner != null)
{
TextBlock expander = LayoutHelper.FindVisualChild <TextBlock>(this.GetCellContent(item));
expander.Text = "+";
this.DataGridOwner.SetDetailsVisibilityForItem(item, Visibility.Collapsed);
if (this.RememberExpandedRows && this.expandedItems.Contains(item))
{
this.expandedItems.Remove(item);
}
this.OnItemCollapsed(item);
}
}
/// <summary>
/// Refreshes the attributes of each row that define whether that row is expandable or not.
/// </summary>
public void RefreshExpandableAttributes()
{
if (this.DataGridOwner != null)
{
foreach (var item in this.DataGridOwner.Items)
{
FrameworkElement content = this.GetCellContent(item);
if (content != null)
{
TextBlock expansionTrigger = LayoutHelper.FindVisualChild <TextBlock>(content);
if (expansionTrigger != null)
{
this.RefreshExpandableAttribute(expansionTrigger);
}
}
}
}
}
