Method AllocateChildren

src/SFGUI/Table.cpp:124–238

}

void Table::AllocateChildren() {
	auto gap = Context::Get().GetEngine().GetProperty<float>(
		"Gap",
		shared_from_this()
	);

	// Calculate column allocations.
	auto total_width = GetAllocation().size.x - 2 * gap;
	std::size_t num_expand = 0;

	// First step is counting number of expandable columns and setting allocation
	// to requisition.
	for( auto& column : m_columns ) {
		if( column.expand ) {
			++num_expand;
		}

		column.allocation = column.requisition;
		total_width -= column.allocation;
	}

	// Next step is distribution of remaining width (i.e. extra width given by
	// parent) to expandable columns. Also calculate column positions.
	auto extra_width = (num_expand > 0 ? total_width / static_cast<float>( num_expand ) : 0 );

	for( std::size_t col_idx = 0; col_idx < m_columns.size(); ++col_idx ) {
		auto& col = m_columns[col_idx];

		if( col.expand ) {
			col.allocation += extra_width;
		}

		if( col_idx == 0 ) {
			col.position = 0;
		}
		else {
			col.position = m_columns[col_idx - 1].position + m_columns[col_idx - 1].allocation;
		}
	}

	// Calculate row allocations.
	auto total_height = 2 * gap + GetAllocation().size.y;
	num_expand = 0;

	// First step is counting number of expandable rows and setting allocation
	// to requisition.
	for( auto& row : m_rows ) {
		if( row.expand ) {
			++num_expand;
		}

		row.allocation = row.requisition;
		total_height -= row.allocation;
	}

	// Next step is distribution of remaining height (i.e. extra height given by
	// parent) to expandable rows. Also calculate rows positions.
	auto extra_height = (num_expand > 0 ? total_height / static_cast<float>( num_expand ) : 0 );