From 627350ca3185c64b453e70b0d2eaeba59f75fe93 Mon Sep 17 00:00:00 2001
From: Ellpeck <me@ellpeck.de>
Date: Mon, 17 Oct 2022 10:57:41 +0200
Subject: [PATCH] Added ElementHelper.MakeGrid

---
 CHANGELOG.md                      |  1 +
 MLEM.Ui/Elements/ElementHelper.cs | 23 +++++++++++++++++++++--
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcbe089..1b90597 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -37,6 +37,7 @@ Additions
 - Added Element.OnAddedToUi and Element.OnRemovedFromUi
 - Added ScrollBar.MouseDragScrolling
 - Added Panel.ScrollToElement
+- Added ElementHelper.MakeGrid
 
 Improvements
 - Allow elements to auto-adjust their size even when their children are aligned oddly
diff --git a/MLEM.Ui/Elements/ElementHelper.cs b/MLEM.Ui/Elements/ElementHelper.cs
index 47d565d..3fd55a3 100644
--- a/MLEM.Ui/Elements/ElementHelper.cs
+++ b/MLEM.Ui/Elements/ElementHelper.cs
@@ -68,12 +68,31 @@ namespace MLEM.Ui.Elements {
             for (var i = 0; i < amount; i++) {
                 var anchor = i == amount - 1 ? Anchor.AutoInlineIgnoreOverflow : Anchor.AutoInline;
                 cols[i] = new Group(anchor, new Vector2(totalSize.X / amount, totalSize.Y), setHeightBasedOnChildren);
-                if (parent != null)
-                    parent.AddChild(cols[i]);
+                parent?.AddChild(cols[i]);
             }
             return cols;
         }
 
+        /// <summary>
+        /// Creates an array of groups with a fixed width and height that can be used to create a grid with equally sized boxes.
+        /// </summary>
+        /// <param name="parent">The element the groups should be added to, can be <see langword="null"/>.</param>
+        /// <param name="totalSize">The total size that the grid should take up.</param>
+        /// <param name="width">The width of the grid, or the amount of columns it should have.</param>
+        /// <param name="height">The height of the grid, or the amount of rows it should have.</param>
+        /// <returns>The created grid.</returns>
+        public static Group[,] MakeGrid(Element parent, Vector2 totalSize, int width, int height) {
+            var grid = new Group[width, height];
+            for (var y = 0; y < height; y++) {
+                for (var x = 0; x < width; x++) {
+                    var anchor = x == 0 ? Anchor.AutoLeft : Anchor.AutoInlineIgnoreOverflow;
+                    grid[x, y] = new Group(anchor, new Vector2(totalSize.X / width, totalSize.Y / height), false);
+                    parent?.AddChild(grid[x, y]);
+                }
+            }
+            return grid;
+        }
+
         /// <summary>
         /// Creates a <see cref="TextField"/> with a + and a - button next to it, to allow for easy number input.
         /// </summary>