From c7bfbc8567be05007c755ca1f69875a88826c326 Mon Sep 17 00:00:00 2001
From: UnknownShadow200 <unknownshadow200@gmail.com>
Date: Sat, 4 Apr 2015 17:50:11 +1100
Subject: [PATCH] Add scrolling in block hotbar.

---
 Camera.cs                  | 6 ++++--
 Game/Game.InputHandling.cs | 8 +++++++-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/Camera.cs b/Camera.cs
index ac86548ec..6f6a00a7f 100644
--- a/Camera.cs
+++ b/Camera.cs
@@ -18,7 +18,8 @@ namespace ClassicalSharp {
 		public virtual void Tick( double elapsed ) {
 		}
 		
-		public virtual void MouseZoom( MouseWheelEventArgs e ) {
+		public virtual bool MouseZoom( MouseWheelEventArgs e ) {
+			return false;
 		}
 		
 		public abstract void RegrabMouse();
@@ -104,9 +105,10 @@ namespace ClassicalSharp {
 		}
 		
 		float distance = 3;		
-		public override void MouseZoom( MouseWheelEventArgs e ) {
+		public override bool MouseZoom( MouseWheelEventArgs e ) {
 			distance -= e.DeltaPrecise;
 			if( distance < 2 ) distance = 2;
+			return true;
 		}
 		
 		public override Matrix4 GetView() {
diff --git a/Game/Game.InputHandling.cs b/Game/Game.InputHandling.cs
index 9ba84f465..4eeaaeee8 100644
--- a/Game/Game.InputHandling.cs
+++ b/Game/Game.InputHandling.cs
@@ -61,7 +61,13 @@ namespace ClassicalSharp {
 		}
 
 		void MouseWheelChanged( object sender, MouseWheelEventArgs e ) {
-			Camera.MouseZoom( e );
+			if( !Camera.MouseZoom( e ) && CanChangeHeldBlock ) {
+				int diffIndex = -e.Delta % BlocksHotbar.Length;
+				int newIndex = HeldBlockIndex + diffIndex;
+				if( newIndex < 0 ) newIndex += BlocksHotbar.Length;
+				if( newIndex >= BlocksHotbar.Length ) newIndex -= BlocksHotbar.Length;
+				HeldBlockIndex = newIndex;
+			}
 		}
 
 		void KeyPressHandler( object sender, KeyPressEventArgs e ) {