Store column widths in the global preferences.

Yafc/Utils/Preferences.cs

@@ -57,6 +57,10 @@ public void Save() {
         /// The initial height of the main screen or the height the main screen will be after being restored, depending on whether it starts restored or maximized.
         /// </summary>
         public float initialMainScreenHeight { get; set; }
+        public float recipeColumnWidth { get; set; }
+        public float ingredientsColumWidth { get; set; }
+        public float productsColumWidth { get; set; }
+        public float modulesColumnWidth { get; set; }
 
         public void AddProject(string path, string dataPath, string modsPath, bool expensiveRecipes, bool netProduction) {
             recentProjects = recentProjects.Where(x => string.Compare(path, x.path, StringComparison.InvariantCultureIgnoreCase) != 0)

Yafc/Widgets/DataGrid.cs

@@ -1,23 +1,65 @@
 using System;
 using System.Collections.Generic;
 using System.Numerics;
+using System.Reflection;
 using SDL2;
 
 namespace Yafc.UI {
-    public abstract class DataColumn<TData>(float width, float minWidth = 0f, float maxWidth = 0f) {
-        public readonly float minWidth = minWidth == 0f ? width : minWidth;
-        public readonly float maxWidth = maxWidth == 0f ? width : maxWidth;
-        public readonly bool isFixedSize = minWidth == maxWidth;
-        public float width = width;
+    public abstract class DataColumn<TData> {
+        public readonly float minWidth;
+        public readonly float maxWidth;
+        public bool isFixedSize => minWidth == maxWidth;
+        private readonly Func<float> getWidth;
+        private readonly Action<float> setWidth;
+        private float _width;
+
+        /// <param name="widthStorage">If not <see langword="null"/>, names a public read-write instance property in <see cref="Preferences"/> that will be used to store the width of this column.
+        /// If the current value of the property is out of range, the initial width will be <paramref name="initialWidth"/>.</param>
+        public DataColumn(float initialWidth, float minWidth = 0f, float maxWidth = 0f, string? widthStorage = null) {
+            this.minWidth = minWidth == 0f ? initialWidth : minWidth;
+            this.maxWidth = maxWidth == 0f ? initialWidth : maxWidth;
+            if (widthStorage != null) {
+                (getWidth, setWidth) = getStorage(widthStorage);
+            }
+            else {
+                getWidth = () => _width;
+                setWidth = f => _width = f;
+            }
+
+            if (width < this.minWidth || width > this.maxWidth) {
+                width = initialWidth;
+            }
+
+            static (Func<float>, Action<float>) getStorage(string storage) {
+                try {
+                    PropertyInfo? property = typeof(Preferences).GetProperty(storage);
+                    Func<float>? getMethod = property?.GetGetMethod()?.CreateDelegate<Func<float>>(Preferences.Instance);
+                    Action<float>? setMethod = property?.GetSetMethod()?.CreateDelegate<Action<float>>(Preferences.Instance);
+                    if (getMethod == null || setMethod == null) {
+                        throw new ArgumentException($"'{storage}' is not a public read-write property in {nameof(Preferences)}.");
+                    }
+                    return (getMethod, setMethod);
+                }
+                catch (ArgumentException) {
+                    // Not including the CreateDelegate's exception, because YAFC displays only the innermost exception message.
+                    throw new ArgumentException($"'{storage}' is not a instance property of type {typeof(float).Name} in {nameof(Preferences)}.");
+                }
+            }
+        }
+
+        public float width {
+            get => getWidth();
+            set => setWidth(value);
+        }
 
         public abstract void BuildHeader(ImGui gui);
         public abstract void BuildElement(ImGui gui, TData data);
     }
 
-    public abstract class TextDataColumn<TData>(string header, float width, float minWidth = 0, float maxWidth = 0, bool hasMenu = false) : DataColumn<TData>(width, minWidth, maxWidth) {
-        public readonly string header = header;
-        private readonly bool hasMenu = hasMenu;
-
+    /// <param name="widthStorage">If not <see langword="null"/>, names an instance property in <see cref="Preferences"/> that will be used to store the width of this column.
+    /// If the current value of the property is out of range, the initial width will be <paramref name="initialWidth"/>.</param>
+    public abstract class TextDataColumn<TData>(string header, float initialWidth, float minWidth = 0, float maxWidth = 0, bool hasMenu = false, string? widthStorage = null)
+        : DataColumn<TData>(initialWidth, minWidth, maxWidth, widthStorage) {
         public override void BuildHeader(ImGui gui) {
             gui.BuildText(header);
             if (hasMenu) {

Yafc/Windows/MainScreen.cs

@@ -464,6 +464,7 @@ protected override void WindowResize() {
         }
 
         public void ForceClose() {
+            Preferences.Instance.Save();
             base.Close();
         }
 

Yafc/Workspace/ProductionTable/ProductionTableView.cs

@@ -17,7 +17,10 @@ public ProductionTableView() {
             flatHierarchyBuilder = new FlatHierarchy<RecipeRow, ProductionTable>(grid, BuildSummary, "This is a nested group. You can drag&drop recipes here. Nested groups can have their own linked materials.");
         }
 
-        private abstract class ProductionTableDataColumn(ProductionTableView view, string header, float width, float minWidth = 0, float maxWidth = 0, bool hasMenu = true) : TextDataColumn<RecipeRow>(header, width, minWidth, maxWidth, hasMenu) {
+        /// <param name="widthStorage">If not <see langword="null"/>, names an instance property in <see cref="Preferences"/> that will be used to store the width of this column.
+        /// If the current value of the property is out of range, the initial width will be <paramref name="initialWidth"/>.</param>
+        private abstract class ProductionTableDataColumn(ProductionTableView view, string header, float initialWidth, float minWidth = 0, float maxWidth = 0, bool hasMenu = true, string? widthStorage = null)
+            : TextDataColumn<RecipeRow>(header, initialWidth, minWidth, maxWidth, hasMenu, widthStorage) {
             protected readonly ProductionTableView view = view;
         }
 
@@ -94,7 +97,7 @@ private void BuildRowMarker(ImGui gui, RecipeRow row) {
             }
         }
 
-        private class RecipeColumn(ProductionTableView view) : ProductionTableDataColumn(view, "Recipe", 13f, 13f, 30f) {
+        private class RecipeColumn(ProductionTableView view) : ProductionTableDataColumn(view, "Recipe", 13f, 13f, 30f, widthStorage: nameof(Preferences.recipeColumnWidth)) {
             public override void BuildElement(ImGui gui, RecipeRow recipe) {
                 gui.spacing = 0.5f;
                 switch (gui.BuildFactorioObjectButton(recipe.recipe, 3f)) {
@@ -451,7 +454,7 @@ public override void BuildMenu(ImGui gui) {
             }
         }
 
-        private class IngredientsColumn(ProductionTableView view) : ProductionTableDataColumn(view, "Ingredients", 32f, 16f, 100f, hasMenu: false) {
+        private class IngredientsColumn(ProductionTableView view) : ProductionTableDataColumn(view, "Ingredients", 32f, 16f, 100f, hasMenu: false, nameof(Preferences.ingredientsColumWidth)) {
             public override void BuildElement(ImGui gui, RecipeRow recipe) {
                 var grid = gui.EnterInlineGrid(3f, 1f);
                 if (recipe.isOverviewMode) {
@@ -470,7 +473,7 @@ public override void BuildElement(ImGui gui, RecipeRow recipe) {
             }
         }
 
-        private class ProductsColumn(ProductionTableView view) : ProductionTableDataColumn(view, "Products", 12f, 10f, 70f, hasMenu: false) {
+        private class ProductsColumn(ProductionTableView view) : ProductionTableDataColumn(view, "Products", 12f, 10f, 70f, hasMenu: false, nameof(Preferences.productsColumWidth)) {
             public override void BuildElement(ImGui gui, RecipeRow recipe) {
                 var grid = gui.EnterInlineGrid(3f, 1f);
                 if (recipe.isOverviewMode) {
@@ -511,7 +514,8 @@ private class ModulesColumn : ProductionTableDataColumn {
             private readonly VirtualScrollList<ProjectModuleTemplate> moduleTemplateList;
             private RecipeRow editingRecipeModules = null!; // null-forgiving: This is set as soon as we open a module dropdown.
 
-            public ModulesColumn(ProductionTableView view) : base(view, "Modules", 10f, 7f, 16f) => moduleTemplateList = new VirtualScrollList<ProjectModuleTemplate>(15f, new Vector2(20f, 2.5f), ModuleTemplateDrawer, collapsible: true);
+            public ModulesColumn(ProductionTableView view) : base(view, "Modules", 10f, 7f, 16f, widthStorage: nameof(Preferences.modulesColumnWidth))
+                => moduleTemplateList = new VirtualScrollList<ProjectModuleTemplate>(15f, new Vector2(20f, 2.5f), ModuleTemplateDrawer, collapsible: true);
 
             private void ModuleTemplateDrawer(ImGui gui, ProjectModuleTemplate element, int index) {
                 var evt = gui.BuildContextMenuButton(element.name, icon: element.icon?.icon ?? default, disabled: !element.template.IsCompatibleWith(editingRecipeModules));

changelog.txt

@@ -20,6 +20,7 @@ Version 0.7.4
 Date: July 24th 2024
     Features:
         - Add the ability to switch through project pages with control-tab and control-shift-tab
+        - When opening the main window, use the same column widths as when it was last closed.
     Bugfixes:
         - Fix a possible threading race while destroying textures, which could cause an illegal access crash.
         - Fix a loading error when mods use non-ASCII characters in their settings.