public void CalculateWidths(Pango.Layout layout, bool headerVisible, int headerHeight)
{
bool min_was_zero = MinWidth == 0;
bool was_size_req = false;
var sr_cell = cells[0] as ISizeRequestCell;
if (sr_cell != null && sr_cell.RestrictSize)
{
int min_w, max_w;
sr_cell.GetWidthRange(layout, out min_w, out max_w);
MinWidth = min_w == -1 ? MinWidth : min_w;
MaxWidth = max_w == -1 ? MaxWidth : max_w;
was_size_req = true;
}
if (headerVisible && (min_was_zero || was_size_req) && !string.IsNullOrEmpty(Title))
{
int w, h;
layout.SetText(Title);
//column_layout.SetText ("\u2026"); // ellipsis char
layout.GetPixelSize(out w, out h);
// Pretty sure the 3* is needed here only b/c of the " - 8" in ColumnCellText;
// See TODO there
w += 3 * (int)HeaderCell.Padding.Left;
if (this is ISortableColumn)
{
w += ColumnHeaderCellText.GetArrowWidth(headerHeight);
}
MinWidth = Math.Max(MinWidth, w);
// If the min/max are sufficiently close (arbitrarily choosen as < 8px) then
// make them equal, so that the column doesn't appear resizable but in reality is on barely.
if (MaxWidth - MinWidth < 8)
{
MinWidth = MaxWidth;
}
}
}
private void RecalculateColumnSizes()
{
if (column_cache == null)
{
return;
}
ISortable sortable = Model as ISortable;
sort_column_index = -1;
int min_header_width = 0;
for (int i = 0; i < column_cache.Length; i++)
{
if (sortable != null)
{
ColumnHeaderCellText column_cell = column_cache[i].Column.HeaderCell as ColumnHeaderCellText;
if (column_cell != null)
{
ISortableColumn sort_column = column_cache[i].Column as ISortableColumn;
column_cell.HasSort = sort_column != null && sortable.SortColumn == sort_column;
if (column_cell.HasSort)
{
sort_column_index = i;
}
}
}
column_cache[i].Column.CalculateWidths(column_layout, HeaderVisible, HeaderHeight);
column_cache[i].MaxWidth = column_cache[i].Column.MaxWidth;
column_cache[i].MinWidth = column_cache[i].Column.MinWidth;
min_header_width += column_cache[i].MinWidth;
}
if (column_cache.Length == 1)
{
column_cache[0].Column.Width = 1.0;
}
else if (min_header_width >= header_interaction_alloc.Width)
{
header_width = min_header_width;
resizable = false;
for (int i = 0; i < column_cache.Length; i++)
{
column_cache[i].Column.Width = (double)column_cache[i].MinWidth / (double)header_width;
}
}
else
{
header_width = header_interaction_alloc.Width;
resizable = true;
if (elastic_columns == null)
{
elastic_columns = new List <int> (column_cache.Length);
}
elastic_columns.Clear();
for (int i = 0; i < column_cache.Length; i++)
{
elastic_columns.Add(i);
column_cache[i].ElasticWidth = 0.0;
column_cache[i].ElasticPercent = column_cache[i].Column.Width * header_width;
}
double remaining_width = RecalculateColumnSizes(header_width, header_width);
while (Math.Round(remaining_width) != 0.0 && elastic_columns.Count > 0)
{
double total_elastic_width = 0.0;
foreach (int i in elastic_columns)
{
total_elastic_width += column_cache[i].ElasticWidth;
}
remaining_width = RecalculateColumnSizes(remaining_width, total_elastic_width);
}
for (int i = 0; i < column_cache.Length; i++)
{
column_cache[i].Column.Width = column_cache[i].ElasticWidth / (double)header_width;
}
}
double tmp_width = 0.0;
double tmp_max = 0.0;
foreach (var col in column_cache)
{
tmp_width += col.ElasticWidth;
tmp_max += col.MaxWidth == Int32.MaxValue ? col.MinWidth : col.MaxWidth;
}
list_width = tmp_width;
max_width = tmp_max;
}
