Use calculated width for first column of Summary page (#167)

With this PR the fixed width (introduced by #38) will be no more and the
column width is dynamically calculated depending on the names of the
production sheets.

---

This change is part of a larger set of changes that I am planning to
commit, but those changes need some additional love... (It works, but I
broke some things that should not be broken).

This change is ready and works separately and adds value to YAFC
already.

I had to apply one small hack to make this a stand-alone PR, which is
making `firstColumnWidth` static. In the upcoming PR it will be a
regular field of its class.

Author: shpaass

Yafc.UI/ImGui/ImGuiBuilding.cs

@@ -100,6 +100,19 @@ public void BuildText(string? text, Font? font = null, bool wrap = false, RectAl
             }
         }
 
+        public Vector2 GetTextDimensions(out TextCache? cache, string? text, Font? font = null, bool wrap = false, float maxWidth = float.MaxValue) {
+            if (string.IsNullOrEmpty(text)) {
+                cache = null;
+                return Vector2.Zero;
+            }
+
+            var fontSize = GetFontSize(font);
+            cache = textCache.GetCached((fontSize, text, wrap ? (uint)UnitsToPixels(MathF.Max(width, 5f)) : uint.MaxValue));
+            float textWidth = Math.Min(cache.texRect.w / pixelsPerUnit, maxWidth);
+
+            return new Vector2(textWidth, cache.texRect.h / pixelsPerUnit);
+        }
+
         public Rect AllocateTextRect(out TextCache? cache, string? text, Font? font = null, bool wrap = false, RectAlignment align = RectAlignment.MiddleLeft, float topOffset = 0f, float maxWidth = float.MaxValue) {
             var fontSize = GetFontSize(font);
             Rect rect;
@@ -108,9 +121,8 @@ public Rect AllocateTextRect(out TextCache? cache, string? text, Font? font = nu
                 rect = AllocateRect(0f, topOffset + (fontSize.lineSize / pixelsPerUnit));
             }
             else {
-                cache = textCache.GetCached((fontSize, text, wrap ? (uint)UnitsToPixels(MathF.Max(width, 5f)) : uint.MaxValue));
-                float textWidth = Math.Min(cache.texRect.w / pixelsPerUnit, maxWidth);
-                rect = AllocateRect(textWidth, topOffset + (cache.texRect.h / pixelsPerUnit), align);
+                Vector2 textSize = GetTextDimensions(out cache, text, font, wrap, maxWidth);
+                rect = AllocateRect(textSize.X, topOffset + (textSize.Y), align);
             }
 
             if (topOffset != 0f) {

Yafc/Workspace/SummaryView.cs

@@ -1,12 +1,17 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
+using System.Numerics;
 using Yafc.Model;
 using Yafc.UI;
 using YAFC.Model;
 
 namespace Yafc {
     public class SummaryView : ProjectPageView<Summary> {
+        /// <summary>Some padding to have the contents of the first column not 'stick' to the rest of the UI</summary>
+        private readonly Padding FirstColumnPadding = new Padding(1f, 1.5f, 0, 0);
+        private static float firstColumnWidth;
+
         private class SummaryScrollArea(GuiBuilder builder) : ScrollArea(DefaultHeight, builder, MainScreen.Instance.InputSystem, horizontal: true) {
             private static readonly float DefaultHeight = 10;
 
@@ -16,23 +21,23 @@ private class SummaryScrollArea(GuiBuilder builder) : ScrollArea(DefaultHeight,
         }
 
         private class SummaryTabColumn : TextDataColumn<ProjectPage> {
-            private const float FirstColumnWidth = 14f; // About 20 'o' wide
-
-            public SummaryTabColumn() : base("Tab", FirstColumnWidth) {
+            public SummaryTabColumn() : base("Tab", firstColumnWidth) {
             }
 
             public override void BuildElement(ImGui gui, ProjectPage page) {
+                width = firstColumnWidth;
+
                 if (page?.contentType != typeof(ProductionTable)) {
                     return;
                 }
 
                 using (gui.EnterGroup(new Padding(0.5f, 0.2f, 0.2f, 0.5f))) {
                     gui.spacing = 0.2f;
                     if (page.icon != null) {
-                        gui.BuildIcon(page.icon.icon);
+                        gui.BuildIcon(page.icon.icon, FirstColumnIconSize);
                     }
                     else {
-                        _ = gui.AllocateRect(0f, 1.5f);
+                        _ = gui.AllocateRect(0f, FirstColumnIconSize);
                     }
 
                     gui.BuildText(page.name);
@@ -142,6 +147,7 @@ private static void SetProviderAmount(ProductionLink element, ProjectPage page,
         private static readonly float Epsilon = 1e-5f;
         private static readonly float ElementWidth = 3;
         private static readonly float ElementSpacing = 1;
+        private static readonly float FirstColumnIconSize = 1.5f;
 
         private struct GoodDetails {
             public float totalProvided;
@@ -201,12 +207,34 @@ protected override void BuildHeader(ImGui gui) {
             gui.allocator = RectAllocator.LeftAlign;
         }
 
+        private float CalculateFirstColumWidth(ImGui gui) {
+            // At the least the icons should fit
+            float width = FirstColumnIconSize;
+
+            foreach (Guid displayPage in project.displayPages) {
+                ProjectPage? page = project.FindPage(displayPage);
+                if (page?.contentType != typeof(ProductionTable)) {
+                    continue;
+                }
+
+                Vector2 textSize = gui.GetTextDimensions(out _, page.name);
+                width = MathF.Max(width, textSize.X);
+            }
+
+            // Include padding to perfectly match
+            return width + FirstColumnPadding.left + FirstColumnPadding.right;
+        }
+
         protected override void BuildContent(ImGui gui) {
             if (gui.BuildCheckBox("Only show issues", model.showOnlyIssues, out bool newValue)) {
                 model.showOnlyIssues = newValue;
                 Recalculate();
             }
 
+            if (gui.isBuilding) {
+                firstColumnWidth = CalculateFirstColumWidth(gui);
+            }
+
             scrollArea.Build(gui);
         }
 

changelog.txt

@@ -17,6 +17,7 @@ Date: soon
         - Add several right-click and keyboard shortcuts, notably Enter/Return to close most dialogs.
         - Add UI rebuilding itself on resize.
         - When opening the main window, use the same size it was when it was last closed.
+        - Use calculated width for first column of Summary page.
     Bugfixes:
         - Fix that some pages couldn't be deleted.
         - Fix that returning to the Welcome Screen could break the panels in the main window.