/// <summary>
/// Initializes a new instance of the ColumnDescription class.
/// </summary>
/// <param name="columnViewColumn">The ColumnViewColumn used as a source for this shallow clone.</param>
public ColumnDescription(ColumnViewColumn columnViewColumn)
{
// Initialize the object
this.columnField = columnViewColumn;
this.descriptionField = columnViewColumn.Description;
this.isVisibleField = columnViewColumn.IsVisible;
this.widthField = columnViewColumn.Width;
}
/// <summary>
/// Sizes the column to fit the largest cell.
/// </summary>
/// <param name="columnViewColumn">The column to be autosized.</param>
void AutoSizeColumn(ColumnViewColumn columnViewColumn)
{
// This will create the same element that is used by the ColumnView templates.
FrameworkElement frameworkElement = ColumnViewRowPresenter.CreateCell(columnViewColumn);
// Now that we have the destination element we're going to pump all of the content through it and measure the maximum width of the columns.
Double maxWidth = Double.MinValue;
foreach (Object item in this.ListView.Items)
{
frameworkElement.DataContext = item;
frameworkElement.UpdateLayout();
frameworkElement.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
maxWidth = Math.Max(frameworkElement.DesiredSize.Width, maxWidth);
}
// This will set the column to the maximum width calculated above.
columnViewColumn.Width = maxWidth;
}
/// <summary>
/// Handles a routed command to sort the column.
/// </summary>
/// <param name="sender">The Object that generated the event.</param>
/// <param name="routedEventArgs">The routed event arguments.</param>
void OnHeaderClick(Object sender, RoutedEventArgs routedEventArgs)
{
// Extract from the command arguments the column header that generated a request to be autosized and then resize the column.
ColumnViewColumnHeader columnViewColumnHeader = routedEventArgs.OriginalSource as ColumnViewColumnHeader;
ColumnViewColumn columnViewColumn = columnViewColumnHeader.Column;
// This will prevent each change we make to the view from triggering an update of the viewed data.
using (this.consumerCollection.View.DeferRefresh())
{
// Clear out the existing sort order from the view.
this.consumerCollection.View.SortDescriptions.Clear();
// Clear the sort order for the other columns.
foreach (ColumnViewColumn siblingColumn in this.ColumnView.Columns)
{
if (siblingColumn != columnViewColumn)
{
siblingColumn.SortDirection = SortDirection.None;
}
}
// If a DisplayMemberBinding exists for this column, we'll use that binding to find the property used to populate this column.
Binding binding = columnViewColumn.DisplayMemberBinding as Binding;
if (binding != null)
{
// This will toggle the sort order for this column (or select Ascending if the sort order hasn't been set) and set the corresonding sort order in
// the collection view.
columnViewColumn.SortDirection = columnViewColumn.SortDirection == SortDirection.Ascending ? SortDirection.Descending : SortDirection.Ascending;
ListSortDirection listSortDirection =
columnViewColumn.SortDirection == SortDirection.Descending ?
ListSortDirection.Descending :
ListSortDirection.Ascending;
this.consumerCollection.View.SortDescriptions.Add(new SortDescription(binding.Path.Path, listSortDirection));
}
}
}
