/// <summary>
/// For a multirow component, ratiometrically splits up any excess preferred size
/// among the rows in its span that have a flexible height.
/// </summary>
/// <param name="component">The component to reallocate sizes.</param>
private void ExpandMultiRow(SizedGridComponent component)
{
float need = component.VerticalSize.preferred, totalFlex = 0.0f;
int start = component.Row, end = start + component.RowSpan;
for (int i = start; i < end; i++)
{
var spec = ComputedRowSpecs[i];
if (spec.FlexHeight > 0.0f)
{
totalFlex += spec.FlexHeight;
}
need -= spec.Height;
}
if (need > 0.0f && totalFlex > 0.0f)
{
// No flex = we can do nothing about it
for (int i = start; i < end; i++)
{
var spec = ComputedRowSpecs[i];
float flex = spec.FlexHeight;
if (flex > 0.0f)
{
ComputedRowSpecs[i] = new GridRowSpec(spec.Height + flex * need /
totalFlex, flex);
}
}
}
}
/// <summary>
/// For a multicolumn component, ratiometrically splits up any excess preferred size
/// among the columns in its span that have a flexible width.
/// </summary>
/// <param name="component">The component to reallocate sizes.</param>
private void ExpandMultiColumn(SizedGridComponent component)
{
float need = component.HorizontalSize.preferred, totalFlex = 0.0f;
int start = component.Column, end = start + component.ColumnSpan;
for (int i = start; i < end; i++)
{
var spec = ComputedColumnSpecs[i];
if (spec.FlexWidth > 0.0f)
{
totalFlex += spec.FlexWidth;
}
need -= spec.Width;
}
if (need > 0.0f && totalFlex > 0.0f)
{
// No flex = we can do nothing about it
for (int i = start; i < end; i++)
{
var spec = ComputedColumnSpecs[i];
float flex = spec.FlexWidth;
if (flex > 0.0f)
{
ComputedColumnSpecs[i] = new GridColumnSpec(spec.Width + flex * need /
totalFlex, flex);
}
}
}
}