/// <summary>
/// Arranges (positions and determines size) of row of data in a TreeView ListView</summary>
/// <param name="arrangeSize">Row's final size</param>
/// <returns>Row's final size</returns>
protected override Size ArrangeOverride(Size arrangeSize)
{
Size s = base.ArrangeOverride(arrangeSize);
if (this.Columns == null || this.Columns.Count == 0)
{
return(s);
}
UIElement expander = this.Expander;
double current = 0;
double max = arrangeSize.Width;
for (int x = 0; x < this.Columns.Count; x++)
{
GridViewColumn column = this.Columns[x];
// Actual index needed for column reorder
UIElement uiColumn = (UIElement)base.GetVisualChild((int)ActualIndexProperty.GetValue(column, null));
// Compute column width
double w = Math.Min(max, (Double.IsNaN(column.Width)) ? (double)DesiredWidthProperty.GetValue(column, null) : column.Width);
// First column indent
if (x == 0 && expander != null)
{
double indent = FirstColumnIndent + expander.DesiredSize.Width;
uiColumn.Arrange(new Rect(current + indent, 0, Math.Max(0, w - indent), arrangeSize.Height));
}
else
{
uiColumn.Arrange(new Rect(current, 0, w, arrangeSize.Height));
}
max -= w;
current += w;
}
// Show expander
if (expander != null)
{
expander.Arrange(new Rect(this.FirstColumnIndent, 0, expander.DesiredSize.Width, expander.DesiredSize.Height));
}
return(s);
}
set => SetValue(DesiredWidthProperty, value);
