Method RecalculateSize

src/SFGUI/Notebook.cpp:564–710

}

void Notebook::RecalculateSize() {
	if( !IsGloballyVisible() ) {
		return;
	}

	float padding( Context::Get().GetEngine().GetProperty<float>( "Padding", shared_from_this() ) );
	float border_width( Context::Get().GetEngine().GetProperty<float>( "BorderWidth", shared_from_this() ) );
	float scroll_button_size( Context::Get().GetEngine().GetProperty<float>( "ScrollButtonSize", shared_from_this() ) );

	for( const auto& child : m_children ) {
		child.tab_label->Show( false );
	}

	auto children_size = static_cast<IndexType>( m_children.size() );

	m_num_displayed_tabs = children_size - GetFirstDisplayedTab();

	if( GetTabPosition() == TabPosition::TOP ) {
		// Tabs are positioned at top.
		auto tab_current_x = ( GetScrollable() && GetFirstDisplayedTab() != 0 ) ? scroll_button_size : 0.f;

		for( auto index = GetFirstDisplayedTab(); index < children_size; ++index ) {
			if( GetScrollable() && ( tab_current_x + border_width + 2.f * padding + m_children[static_cast<std::size_t>( index )].tab_label->GetRequisition().x + scroll_button_size ) > GetAllocation().size.x ) {
				m_num_displayed_tabs = index - GetFirstDisplayedTab();
				break;
			}

			m_children[static_cast<std::size_t>( index )].tab_label->Show( true );

			m_children[static_cast<std::size_t>( index )].child->SetAllocation(
				sf::FloatRect(
					{ border_width + padding, m_tab_requisition.y + border_width + padding },
					{ GetAllocation().size.x - 2.f * ( border_width + padding ), GetAllocation().size.y - ( 2.f * ( border_width + padding ) + m_tab_requisition.y ) }
				)
			);

			m_children[static_cast<std::size_t>( index )].tab_label->SetAllocation(
				sf::FloatRect(
					{ tab_current_x + border_width + padding, border_width + padding },
					{ m_children[static_cast<std::size_t>( index )].tab_label->GetRequisition().x, m_tab_requisition.y - 2.f * padding - border_width }
				)
			);

			tab_current_x += ( border_width + 2.f * padding + m_children[static_cast<std::size_t>( index )].tab_label->GetRequisition().x );
		}
	}
	else if( GetTabPosition() == TabPosition::BOTTOM ) {
		// Tabs are positioned at bottom.
		auto tab_current_x = ( GetScrollable() && GetFirstDisplayedTab() != 0 ) ? scroll_button_size : 0.f;

		for( auto index = GetFirstDisplayedTab(); index < children_size; ++index ) {
			if( GetScrollable() && ( tab_current_x + border_width + 2.f * padding + m_children[static_cast<std::size_t>( index )].tab_label->GetRequisition().x + scroll_button_size ) > GetAllocation().size.x ) {
				m_num_displayed_tabs = index - GetFirstDisplayedTab();
				break;
			}

			m_children[static_cast<std::size_t>( index )].tab_label->Show( true );