From 5212756a4913160a4519066fb928955dea99d009 Mon Sep 17 00:00:00 2001
From: Integer Limit <103940576+IntegerLimit@users.noreply.github.com>
Date: Sat, 28 Dec 2024 16:21:46 +1100
Subject: [PATCH] Fix Mouse Interactions with Scrollbar

---
 .../mixin/betterp2p/WidgetScrollBarMixin.java | 61 +++++++++++++++++++
 .../resources/mixins.nomilabs.betterp2p.json  |  1 +
 2 files changed, 62 insertions(+)
 create mode 100644 src/main/java/com/nomiceu/nomilabs/mixin/betterp2p/WidgetScrollBarMixin.java

diff --git a/src/main/java/com/nomiceu/nomilabs/mixin/betterp2p/WidgetScrollBarMixin.java b/src/main/java/com/nomiceu/nomilabs/mixin/betterp2p/WidgetScrollBarMixin.java
new file mode 100644
index 0000000..ecb59a9
--- /dev/null
+++ b/src/main/java/com/nomiceu/nomilabs/mixin/betterp2p/WidgetScrollBarMixin.java
@@ -0,0 +1,61 @@
+package com.nomiceu.nomilabs.mixin.betterp2p;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import com.projecturanus.betterp2p.client.gui.widget.WidgetScrollBar;
+
+/**
+ * Fixes clicking scrollbar.
+ */
+@Mixin(value = WidgetScrollBar.class, remap = false)
+public abstract class WidgetScrollBarMixin {
+
+    @Shadow
+    protected abstract int getRange();
+
+    @Shadow
+    private int displayX;
+
+    @Shadow
+    private int width;
+
+    @Shadow
+    private int displayY;
+
+    @Shadow
+    private int height;
+
+    @Shadow
+    private int currentScroll;
+
+    @Shadow
+    private int minScroll;
+
+    @Shadow
+    private boolean moving;
+
+    @Shadow
+    protected abstract void applyRange();
+
+    @Inject(method = "click", at = @At("HEAD"), cancellable = true)
+    private void properlyHandleClick(int x, int y, CallbackInfo ci) {
+        ci.cancel();
+        if (getRange() == 0) {
+            return;
+        }
+
+        if (y > displayY && y <= displayY + height) {
+            if (x > displayX && x <= displayX + width) {
+                currentScroll = y - displayY;
+                currentScroll = minScroll + currentScroll * 2 * getRange() / height;
+                currentScroll = (currentScroll + 1) >> 1;
+                applyRange();
+                moving = true;
+            }
+        }
+    }
+}
diff --git a/src/main/resources/mixins.nomilabs.betterp2p.json b/src/main/resources/mixins.nomilabs.betterp2p.json
index dd922b3..82de40e 100644
--- a/src/main/resources/mixins.nomilabs.betterp2p.json
+++ b/src/main/resources/mixins.nomilabs.betterp2p.json
@@ -20,6 +20,7 @@
     "RenderHandlerMixin",
     "WidgetP2PColumnMixin",
     "WidgetP2PDeviceMixin",
+    "WidgetScrollBarMixin",
     "WidgetTypeSelectorMixin"
   ],
   "server": []