Enable wheel scrolling in GUI list boxes

dpogue · Jan 26, 2025 · 04cdcc2 · 04cdcc2
1 parent 2bde021
commit 04cdcc2
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diff --git a/Sources/Plasma/FeatureLib/pfGameGUIMgr/pfGUIListBoxMod.cpp b/Sources/Plasma/FeatureLib/pfGameGUIMgr/pfGUIListBoxMod.cpp
@@ -775,6 +775,25 @@ void    pfGUIListBoxMod::HandleMouseDblClick( hsPoint3 &mousePt, uint8_t modifie
     }
 }
 
+//// HandleMouseWheel /////////////////////////////////////////////////////////
+
+void pfGUIListBoxMod::HandleMouseWheel(hsPoint3& mousePt, uint8_t modifiers)
+{
+    static float deltaAccum = 0.f;
+
+    deltaAccum += mousePt.fZ;
+
+    // Set the Z-component to 0 for the bounds test
+    mousePt.fZ = 0;
+
+    if (fabs(deltaAccum) >= 120.f) {
+        int32_t delta = int32_t(deltaAccum / 120.f);
+        SetScrollPos(GetScrollPos() + delta);
+
+        deltaAccum -= (delta * 120.f);
+    }
+}
+
 //// IGetItemFromPoint ///////////////////////////////////////////////////////
 
 int32_t   pfGUIListBoxMod::IGetItemFromPoint(const hsPoint3 &mousePt)

diff --git a/Sources/Plasma/FeatureLib/pfGameGUIMgr/pfGUIListBoxMod.h b/Sources/Plasma/FeatureLib/pfGameGUIMgr/pfGUIListBoxMod.h
@@ -151,6 +151,7 @@ class pfGUIListBoxMod : public pfGUIControlMod
         void    HandleMouseDrag(hsPoint3 &mousePt, uint8_t modifiers) override;
         void    HandleMouseHover(hsPoint3 &mousePt, uint8_t modifiers) override;
         void    HandleMouseDblClick(hsPoint3 &mousePt, uint8_t modifiers) override;
+        void    HandleMouseWheel(hsPoint3 &mousePt, uint8_t modifiers) override;
 
         bool    HandleKeyPress(wchar_t key, uint8_t modifiers) override;
         bool    HandleKeyEvent(pfGameGUIMgr::EventType event, plKeyDef key, uint8_t modifiers) override;