experimental feature: hybrid scrollers

haxe/ui/backend/ComponentBase.hx

@@ -1711,6 +1711,11 @@ class ComponentBase extends ComponentSurface implements IClonable<ComponentBase>
         return false;
     }
 
+    private var isHybridScroller(get, null):Bool;
+    private function get_isHybridScroller():Bool {
+        return false;
+    }
+
     private function handleFrameworkProperty(id:String, value:Any) {
 
     }

haxe/ui/containers/ScrollView.hx

@@ -1174,6 +1174,10 @@ class ScrollViewEvents extends haxe.ui.events.Events {
     private var _fadeTimer:Timer = null;
     @:access(haxe.ui.core.Component)
     private function onMouseWheel(event:MouseEvent) {
+        if (_scrollview.isHybridScroller) {
+            return;
+        }
+
         // we'll default to vertical scrolling for the mouse wheel, however,
         // if there is no vertical scrollbar we'll try to use horizontal
         // scrolling instead - note that if the shiftkey is pressed

haxe/ui/core/IScroller.hx

@@ -5,4 +5,6 @@ interface IScroller {
     public var isScrollableHorizontally(get, null):Bool;
     public var isScrollableVertically(get, null):Bool;
     public var isScrollable(get, null):Bool;
+    public var vscrollPos(get, set):Float;
+    public var hscrollPos(get, set):Float;
 }