Crafter.Graphics/interfaces/Crafter.Graphics-GridElement.cppm

/*
Crafter®.Graphics
Copyright (C) 2026 Catcrafts®
catcrafts.net

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 3.0 as published by the Free Software Foundation;

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
*/

export module Crafter.Graphics:GridElement;
import std;
import :Transform2D;
import :ForwardDeclarations;

export namespace Crafter {
    struct GridElement : Transform2D {
        std::uint32_t columns;
        std::uint32_t rows;
        std::int32_t spacingX;
        std::int32_t spacingY;
        std::int32_t paddingX;
        std::int32_t paddingY;
        GridElement(std::uint32_t columns, std::uint32_t rows, std::int32_t spacingX, std::int32_t spacingY, std::int32_t paddingX, std::int32_t paddingY, Anchor2D anchor) : Transform2D(anchor), columns(columns), rows(rows), spacingX(spacingX), spacingY(spacingY), paddingX(paddingX), paddingY(paddingY) {

        }
        void UpdatePosition(RendertargetBase& window, Transform2D& parent) override {
            ScaleElement(parent);
            std::int32_t cellWidth = (paddingX * 2) - (spacingX * (columns - 1)) / columns;
            std::int32_t cellHeight = (paddingY * 2) - (spacingY * (rows - 1)) / rows;
            
            std::size_t childIndex = 0;
            for (std::uint32_t row = 0; row < rows && childIndex < this->children.size(); ++row) {
                for (std::uint32_t col = 0; col < columns && childIndex < this->children.size(); ++col) {
                    Transform2D* child = this->children[childIndex];
                    
                    // Calculate position for this child
                    std::int32_t childX = (cellWidth * col) + (spacingX * col) + paddingX;

                    std::int32_t childY = (cellHeight * row) + (spacingY * row) + paddingY;
                    
                    // Apply relative positioning
                    child->anchor.x = childX;
                    child->anchor.y = childY;
                    child->anchor.width = cellWidth;
                    child->anchor.height = cellHeight;
                    
                    // Update child position
                    child->UpdatePosition(window, *this);
                    childIndex++;
                }
            }
        }
    };
}