From c96f3ce55b7bcddbceff4dbe5df4a1c3c40fea83 Mon Sep 17 00:00:00 2001
From: Ellpeck <megamaximal@gmail.com>
Date: Wed, 17 Jun 2020 01:48:35 +0200
Subject: [PATCH] hide modifiers if you can't buy them

---
 TouchyTickets/ParkMap.cs           |  4 ++++
 TouchyTickets/TouchyTickets.csproj |  2 +-
 TouchyTickets/Ui.cs                | 29 ++++++++++++++++++++++++-----
 3 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/TouchyTickets/ParkMap.cs b/TouchyTickets/ParkMap.cs
index 707b23d..196c398 100644
--- a/TouchyTickets/ParkMap.cs
+++ b/TouchyTickets/ParkMap.cs
@@ -208,6 +208,10 @@ namespace TouchyTickets {
             return this.attractions.Sum(a => a.Item2.GetModifierAmount(modifier));
         }
 
+        public bool IsAnyAttractionAffected(AttractionModifier modifier) {
+            return this.attractions.Any(a => modifier.IsAffected(a.Item2));
+        }
+
         public ParkMap Copy(int? newWidth = null, int? newHeight = null) {
             var newMap = new ParkMap(newWidth ?? this.Width, newHeight ?? this.Height);
             foreach (var (pos, attraction) in this.attractions)
diff --git a/TouchyTickets/TouchyTickets.csproj b/TouchyTickets/TouchyTickets.csproj
index 403a6b2..a59d4da 100644
--- a/TouchyTickets/TouchyTickets.csproj
+++ b/TouchyTickets/TouchyTickets.csproj
@@ -6,7 +6,7 @@
 
     <ItemGroup>
         <PackageReference Include="Coroutine" Version="2.0.0" />
-        <PackageReference Include="MLEM.Startup" Version="4.0.0-214" />
+        <PackageReference Include="MLEM.Startup" Version="4.0.0-216" />
         <PackageReference Include="MonoGame.Framework.Portable" Version="3.7.1.189">
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
diff --git a/TouchyTickets/Ui.cs b/TouchyTickets/Ui.cs
index 84e1deb..bff974d 100644
--- a/TouchyTickets/Ui.cs
+++ b/TouchyTickets/Ui.cs
@@ -260,16 +260,35 @@ namespace TouchyTickets {
                         this.FadeUi(true);
                     }
                 });
-                button.OnUpdated += (e, time) => button.IsDisabled = GameImpl.Instance.Tickets < modifier.InitialPrice;
-                button.AddChild(new Image(Anchor.CenterLeft, new Vector2(0.2F, 40), modifier.Texture) {
+                var image = button.AddChild(new Image(Anchor.CenterLeft, new Vector2(0.2F, 40), modifier.Texture) {
                     Padding = new Vector2(4)
                 });
                 var right = button.AddChild(new Group(Anchor.TopRight, new Vector2(0.8F, 1)) {CanBeMoused = false});
-                right.AddChild(new Paragraph(Anchor.TopLeft, 1, Localization.Get(modifier.Name), true));
-                right.AddChild(new Paragraph(Anchor.AutoLeft, 1, Localization.Get(modifier.Name + "Description"), true) {TextScale = 0.08F});
+                var name = right.AddChild(new Paragraph(Anchor.TopLeft, 1, Localization.Get(modifier.Name), true));
+                var hiddenName = right.AddChild(new Paragraph(Anchor.TopLeft, 1, "?????", true) {TextColor = Color.Gray});
+                var desc = right.AddChild(new Paragraph(Anchor.AutoLeft, 1, Localization.Get(modifier.Name + "Description"), true) {TextScale = 0.08F});
                 right.AddChild(new Paragraph(Anchor.AutoRight, 1, p => PrettyPrintNumber(modifier.InitialPrice) + "<i ticket>", true));
-                right.AddChild(new Paragraph(Anchor.BottomLeft, 1, $"x{modifier.Multiplier}<i ticket>", true) {TextScale = 0.08F});
+                var genRate = right.AddChild(new Paragraph(Anchor.BottomLeft, 1, $"x{modifier.Multiplier}<i ticket>", true) {TextScale = 0.08F});
+
+                var shouldShow = false;
+                button.OnAreaUpdated += e => {
+                    // this is a pretty expensive operation, so only do it when the area changes
+                    shouldShow = GameImpl.Instance.Map.IsAnyAttractionAffected(modifier);
+                    e.SetData("Show", shouldShow);
+                };
+                button.OnUpdated += (e, time) => {
+                    button.IsDisabled = !shouldShow || GameImpl.Instance.Tickets < modifier.InitialPrice;
+                    image.Color = shouldShow ? Color.White : Color.Black;
+                    name.IsHidden = !shouldShow;
+                    hiddenName.IsHidden = shouldShow;
+                    genRate.IsHidden = !shouldShow;
+                    desc.IsHidden = !shouldShow;
+                };
             }
+            modifierUi.OnAreaUpdated += e => {
+                // sort children by whether they should be shown or not
+                modifierUi.ReorderChildren((e1, e2) => Comparer<bool>.Default.Compare(e2.GetData<bool>("Show"), e1.GetData<bool>("Show")));
+            };
             this.uiSystem.Add("Modifiers", modifierUi);
 
             // upgrade ui