//-------------------------------------------------------------------
//
// Internal Methods / Properties
//
//-------------------------------------------------------------------
#region Internal Methods
/// <summary>
/// process the column collection chagned event
/// </summary>
internal virtual void OnColumnCollectionChanged(GridViewColumnCollectionChangedEventArgs e)
{
if (DesiredWidthList != null)
{
if (e.Action == NotifyCollectionChangedAction.Remove ||
e.Action == NotifyCollectionChangedAction.Replace)
{
// NOTE: The steps to make DesiredWidthList.Count <= e.ActualIndex
//
// 1. init with 3 auto columns;
// 2. add 1 column to the column collection with width 90.0;
// 3. remove the column we jsut added to the the collection;
//
// Now we have DesiredWidthList.Count equals to 3 while the removed column
// has ActualIndex equals to 3.
//
if (DesiredWidthList.Count > e.ActualIndex)
{
DesiredWidthList.RemoveAt(e.ActualIndex);
}
}
else if (e.Action == NotifyCollectionChangedAction.Reset)
{
DesiredWidthList = null;
}
}
}
/// <summary>
/// ensure ShareStateList have at least columns.Count items
/// </summary>
internal void EnsureDesiredWidthList()
{
GridViewColumnCollection columns = Columns;
if (columns != null)
{
int count = columns.Count;
if (DesiredWidthList == null)
{
DesiredWidthList = new List <double>(count);
}
int c = count - DesiredWidthList.Count;
for (int i = 0; i < c; i++)
{
DesiredWidthList.Add(Double.NaN);
}
}
}
