[server] add module

src/app/haxe/ru/m/event/GestureManager.hx

@@ -0,0 +1,73 @@
+package ru.m.event;
+
+import flash.geom.Point;
+import flash.display.DisplayObject;
+import flash.events.TouchEvent;
+
+typedef Touch = {
+    var id:Int;
+    var point:Point;
+}
+
+class GestureManager {
+
+    private var target:DisplayObject;
+    private var touchesMap:Map<Int, Touch>;
+    private var touches:Array<Touch>;
+    private var distance:Float;
+
+    public function new(target:DisplayObject) {
+        this.target = target;
+        touchesMap = new Map();
+        touches = new Array();
+        target.addEventListener(TouchEvent.TOUCH_BEGIN, onTouchBegin);
+        target.addEventListener(TouchEvent.TOUCH_MOVE, onTouchMove);
+        target.addEventListener(TouchEvent.TOUCH_END, onTouchEnd);
+    }
+
+    private function addTouch(id:Int, point:Point):Void {
+        var touch:Touch = {id: id, point: point};
+        touchesMap.set(touch.id, touch);
+        touches.push(touch);
+        if (touches.length == 2) {
+            distance = Point.distance(touches[0].point, touches[1].point);
+        }
+    }
+
+    private function updateTouch(id:Int, point:Point):Void {
+        touchesMap.get(id).point = point;
+        if (touches.length == 2) {
+            var newDistance = Point.distance(touches[0].point, touches[1].point);
+            var event = new ZoomGestureEvent(ZoomGestureEvent.GESTURE_ZOOM);
+            event.zoom = (newDistance - distance) * 0.001;
+            distance = newDistance;
+            target.dispatchEvent(event);
+        }
+    }
+
+    private function removeTouch(id:Int):Void {
+        touches.remove(touchesMap.get(id));
+        touchesMap.remove(id);
+    }
+
+    private function onTouchBegin(event:TouchEvent):Void {
+        addTouch(event.touchPointID, new Point(event.stageX, event.stageY));
+    }
+
+    private function onTouchMove(event:TouchEvent):Void {
+        updateTouch(event.touchPointID, new Point(event.stageX, event.stageY));
+    }
+
+    private function onTouchEnd(event:TouchEvent):Void {
+        removeTouch(event.touchPointID);
+    }
+
+    public function dispose():Void {
+        if (target != null) {
+            target.removeEventListener(TouchEvent.TOUCH_BEGIN, onTouchBegin);
+            target.removeEventListener(TouchEvent.TOUCH_MOVE, onTouchMove);
+            target.removeEventListener(TouchEvent.TOUCH_END, onTouchEnd);
+            target = null;
+        }
+    }
+}