///
/// Sets the column widths.
///
private static void SetColumnWidths(System.Windows.Controls.ListView listView)
{
if (listView.View is not GridView gridView)
{
return;
}
double specifiedWidth = 0;
var columns = GetStretchDataCache(listView);
if (columns == null)
{
//Instance if its our first run.
columns = new List <GridViewColumn>();
// Get all columns with no width having been set.
foreach (var column in gridView.Columns)
{
if (!(column.Width >= 0))
{
columns.Add(column);
}
else
{
specifiedWidth += column.ActualWidth;
}
}
}
else
{
// Get all columns with no width having been set.
foreach (var column in gridView.Columns)
{
if (!columns.Contains(column))
{
specifiedWidth += column.ActualWidth;
}
}
}
// Allocate remaining space equally.
GridViewColumn?lastColumn = default;
foreach (var column in columns)
{
var newWidth = (listView.ActualWidth - specifiedWidth) / columns.Count;
if (newWidth >= 10)
{
column.Width = newWidth - 10;
}
lastColumn = column;
}
// Reclaim space for the vertical scroll bar.
if (lastColumn != null)
{
var scrollView = listView.FindChild <ScrollViewer>();
if (scrollView?.ComputedVerticalScrollBarVisibility == Visibility.Visible)
{
if (lastColumn.Width > SystemParameters.VerticalScrollBarWidth)
{
lastColumn.Width -= SystemParameters.VerticalScrollBarWidth;
}
}
}
//Store the columns in the Tag property for later use.
SetStretchDataCache(listView, columns);
}
