added deltaX, deltaY in processPicking

gui/src/2D/controls/container.ts

@@ -416,7 +416,7 @@ export class Container extends Control {
     }
 
     /** @hidden */
-    public _processPicking(x: number, y: number, type: number, pointerId: number, buttonIndex: number): boolean {
+    public _processPicking(x: number, y: number, type: number, pointerId: number, buttonIndex: number, deltaX?: number, deltaY?: number): boolean {
         if (!this._isEnabled || !this.isVisible || this.notRenderable) {
             return false;
         }
@@ -428,7 +428,7 @@ export class Container extends Control {
         // Checking backwards to pick closest first
         for (var index = this._children.length - 1; index >= 0; index--) {
             var child = this._children[index];
-            if (child._processPicking(x, y, type, pointerId, buttonIndex)) {
+            if (child._processPicking(x, y, type, pointerId, buttonIndex, deltaX, deltaY)) {
                 if (child.hoverCursor) {
                     this._host._changeCursor(child.hoverCursor);
                 }
@@ -440,7 +440,7 @@ export class Container extends Control {
             return false;
         }
 
-        return this._processObservables(type, x, y, pointerId, buttonIndex);
+        return this._processObservables(type, x, y, pointerId, buttonIndex, deltaX, deltaY);
     }
 
     /** @hidden */