/// <summary>
/// Group elements.
/// </summary>
protected override void Group()
{
ElementsGroup.Clear();
var row = new List <LayoutElementInfo>();
ElementsGroup.Add(row);
if (!Layout.FlexSettings.Wrap)
{
row.AddRange(Elements);
return;
}
var base_size = Layout.MainAxisSize;
var size = base_size;
var spacing = Layout.IsHorizontal ? Layout.Spacing.x : Layout.Spacing.y;
for (int i = 0; i < Elements.Count; i++)
{
if (row.Count == 0)
{
size -= Elements[i].AxisSize;
row.Add(Elements[i]);
continue;
}
var element_size = Elements[i].AxisSize + spacing;
if (size >= element_size)
{
size -= element_size;
row.Add(Elements[i]);
}
else
{
size = base_size - Elements[i].AxisSize;
row = new List <LayoutElementInfo>();
ElementsGroup.Add(row);
row.Add(Elements[i]);
}
}
if (!Layout.TopToBottom)
{
ElementsGroup.Reverse();
}
if (Layout.RightToLeft)
{
ElementsGroup.ForEach(ReverseList);
}
}
void InsertToBlock(int block_index, LayoutElementInfo element)
{
for (int i = ElementsGroup.Count; i <= block_index; i++)
{
ElementsGroup.Add(new List <LayoutElementInfo>());
}
var row = ElementsGroup[block_index];
row.Add(element);
BlocksSizes[block_index] += element.AxisSize;
if (row.Count > 1)
{
var spacing = Layout.IsHorizontal ? Layout.Spacing.x : Layout.Spacing.y;
BlocksSizes[block_index] += spacing;
}
}
