Enable scrolling on Color and Cycle buttons

src/main/java/com/enderio/core/client/gui/GuiContainerBase.java

@@ -300,12 +300,25 @@ public abstract class GuiContainerBase extends GuiContainer
                 ghostSlotClicked(slot, x, y, delta < 0 ? -1 : -2);
             }
         }
+        for (Object obj : buttonList) {
+            if (obj instanceof IconButton) {
+                IconButton btn = (IconButton) obj;
+                if (btn.mouseScrolled(mc, x, y, delta)) {
+                    btn.func_146113_a(this.mc.getSoundHandler());
+                    actionPerformedWheel(btn, delta);
+                }
+            }
+        }
     }
 
     protected void actionPerformedButton(IconButton btn, int mouseButton) {
         actionPerformed(btn);
     }
 
+    protected void actionPerformedWheel(IconButton btn, int scrollDelta) {
+        actionPerformed(btn);
+    }
+
     public void addOverlay(IGuiOverlay overlay) {
         overlays.add(overlay);
     }

src/main/java/com/enderio/core/client/gui/button/ColorButton.java

@@ -38,6 +38,21 @@ public class ColorButton extends IconButton {
         return result;
     }
 
+    @Override
+    public boolean mouseScrolled(Minecraft mc, int x, int y, int scrollDelta) {
+        if (super.checkMousePress(mc, x, y)) {
+            if (scrollDelta > 0) {
+                nextColor();
+            } else if (scrollDelta < 0) {
+                prevColor();
+            } else {
+                return false;
+            }
+            return true;
+        }
+        return false;
+    }
+
     public String getTooltipPrefix() {
         return tooltipPrefix;
     }

src/main/java/com/enderio/core/client/gui/button/CycleButton.java

@@ -56,6 +56,21 @@ public class CycleButton<T extends Enum<T> & ICycleEnum> extends IconButton {
         return result;
     }
 
+    @Override
+    public boolean mouseScrolled(Minecraft mc, int x, int y, int scrollDelta) {
+        if (super.checkMousePress(mc, x, y)) {
+            if (scrollDelta > 0) {
+                nextMode();
+            } else if (scrollDelta < 0) {
+                prevMode();
+            } else {
+                return false;
+            }
+            return true;
+        }
+        return false;
+    }
+
     private void nextMode() {
         setMode(modes[(mode.ordinal() + 1) % modes.length]);
     }

src/main/java/com/enderio/core/client/gui/button/IconButton.java

@@ -62,6 +62,19 @@ public class IconButton extends TooltipButton {
         return super.mousePressed(mc, x, y);
     }
 
+    /**
+     * Override this to handle scrolling when the mouse is hovering over the button
+     *
+     * @param mc          The MC instance
+     * @param x           X coordinate of mouse click
+     * @param y           Y coordinate of mouse click
+     * @param scrollDelta the amount by which was scrolled
+     * @return true if the mouse scroll is handled
+     */
+    public boolean mouseScrolled(Minecraft mc, int x, int y, int scrollDelta) {
+        return false;
+    }
+
     /**
      * Draws this button to the screen.
      */