$axure.internal(function($ax) {
    var widgetDragInfo = new Object();
    var _drag = {};
    $ax.drag = _drag;

    $ax.drag.GetWidgetDragInfo = function() {
        return $.extend({}, widgetDragInfo);
    };

    $ax.drag.StartDragWidget = function(event, id) {
        $ax.setjBrowserEvent(jQuery.Event(event));
        //we should only start drag on one target, otherwise the _dragWidget and _stopDragWidget events from multiple targets will be conflicted
        if(event.donotdrag || widgetDragInfo.started) return;

        var x, y;
        var tg;
        if(IE_10_AND_BELOW) {
            x = window.event.clientX + window.document.documentElement.scrollLeft + window.document.body.scrollLeft;
            y = window.event.clientY + window.document.documentElement.scrollTop + window.document.body.scrollTop;
            tg = window.event.srcElement;
        } else {
            if(event.changedTouches) {
                x = event.changedTouches[0].pageX;
                y = event.changedTouches[0].pageY;
            } else {
                x = event.pageX;
                y = event.pageY;
                event.preventDefault();
            }
            tg = event.target;
        }

        widgetDragInfo.started = true;
        widgetDragInfo.hasDragged= false;
        widgetDragInfo.widgetId = id;
        widgetDragInfo.cursorStartX = x;
        widgetDragInfo.cursorStartY = y;
        widgetDragInfo.lastX = x;
        widgetDragInfo.lastY = y;
        widgetDragInfo.currentX = x;
        widgetDragInfo.currentY = y;

        widgetDragInfo.movedWidgets = new Object();
        widgetDragInfo.startTime = (new Date()).getTime();
        widgetDragInfo.targetWidget = tg;

        var movedownName = IE_10_AND_BELOW && $ax.features.supports.windowsMobile ?
            $ax.features.eventNames.mouseDownName : $ax.features.eventNames.mouseMoveName;
        $ax.event.addEvent(document, movedownName, _dragWidget, true);
        $ax.event.addEvent(document, $ax.features.eventNames.mouseUpName, _stopDragWidget, true);

        //$ax.legacy.SuppressBubble(event);
    };

    var _dragWidget = function(event) {
        $ax.setjBrowserEvent(jQuery.Event(event));

        var x, y;
        if(IE_10_AND_BELOW) {
            x = window.event.clientX + window.document.documentElement.scrollLeft + window.document.body.scrollLeft;
            y = window.event.clientY + window.document.documentElement.scrollTop + window.document.body.scrollTop;
        } else {
            if(event.changedTouches) {
                x = event.changedTouches[0].pageX;
                y = event.changedTouches[0].pageY;
                //allow scroll (defaults) if only swipe events have cases and delta x is less than 5px and not blocking scrolling
                var deltaX = x - widgetDragInfo.currentX;
                var target = window.document.getElementById(widgetDragInfo.widgetId);
                if($ax.event.hasSyntheticEvent(widgetDragInfo.widgetId, "onDrag") || $ax.event.hasSyntheticEvent(widgetDragInfo.widgetId, "onSwipeUp") ||
                    $ax.event.hasSyntheticEvent(widgetDragInfo.widgetId, "onSwipeDown") || (deltaX * deltaX) > 25
                    || ($ax.document.configuration.preventScroll && $ax.legacy.GetScrollable(target) == window.document.body)) {
                    event.preventDefault();
                }
            } else {
                x = event.pageX;
                y = event.pageY;
            }
        }
        widgetDragInfo.xDelta = x - widgetDragInfo.currentX;
        widgetDragInfo.yDelta = y - widgetDragInfo.currentY;
        widgetDragInfo.lastX = widgetDragInfo.currentX;
        widgetDragInfo.lastY = widgetDragInfo.currentY;
        widgetDragInfo.currentX = x;
        widgetDragInfo.currentY = y;

        widgetDragInfo.currentTime = (new Date()).getTime();

        // $ax.legacy.SuppressBubble(event);

        if(!widgetDragInfo.hasDragged) {
            widgetDragInfo.hasDragged = true;
            $ax.event.raiseSyntheticEvent(widgetDragInfo.widgetId, "onDragStart");

            //only update to move cursor is we are moving objects
            if($ax.event.hasSyntheticEvent(widgetDragInfo.widgetId, "onDrag")) {
                widgetDragInfo.cursorChanged = true;
                widgetDragInfo.oldBodyCursor = window.document.body.style.cursor;
                window.document.body.style.cursor = 'move';
                var widget = window.document.getElementById(widgetDragInfo.widgetId);
                widgetDragInfo.oldCursor = widget.style.cursor;
                widget.style.cursor = 'move';
                //need to do this in order to change the cursor under nice scroll
                var niceScrollContainer = $ax.adaptive.getNiceScrollContainer(widget);
                if(niceScrollContainer) {
                    widgetDragInfo.oldNiceScrollContainerCursor = niceScrollContainer.style.cursor;
                    niceScrollContainer.style.cursor = 'move';
                }
            }
        }

        $ax.event.raiseSyntheticEvent(widgetDragInfo.widgetId, "onDrag");
    };

    var _suppressClickAfterDrag = function(event) {
        _removeSuppressEvents();

        $ax.legacy.SuppressBubble(event);
    };

    var _removeSuppressEvents = function () {
        if(IE_10_AND_BELOW) {
            $ax.event.removeEvent(event.srcElement, 'click', _suppressClickAfterDrag, undefined, true);
            $ax.event.removeEvent(widgetDragInfo.targetWidget, 'mousemove', _removeSuppressEvents, undefined, true);
        } else {
            $ax.event.removeEvent(document, "click", _suppressClickAfterDrag, true);
            $ax.event.removeEvent(document, 'mousemove', _removeSuppressEvents, true);
        }
    };

    var _stopDragWidget = function(event) {
        $ax.setjBrowserEvent(jQuery.Event(event));

        var tg;


        var movedownName = IE_10_AND_BELOW && $ax.features.supports.windowsMobile ?
            $ax.features.eventNames.mouseDownName : $ax.features.eventNames.mouseMoveName;
        $ax.event.removeEvent(document, movedownName, _dragWidget, true);
        $ax.event.removeEvent(document, $ax.features.eventNames.mouseUpName, _stopDragWidget, true);

        tg = IE_10_AND_BELOW ? window.event.srcElement : event.target;

        if(widgetDragInfo.hasDragged) {
            widgetDragInfo.currentTime = (new Date()).getTime();
            $ax.event.raiseSyntheticEvent(widgetDragInfo.widgetId, "onDragDrop");

            if($ax.globalVariableProvider.getVariableValue('totaldragx') < -30 && $ax.globalVariableProvider.getVariableValue('dragtime') < 1000) {
                $ax.event.raiseSyntheticEvent(widgetDragInfo.widgetId, "onSwipeLeft");
            }

            if($ax.globalVariableProvider.getVariableValue('totaldragx') > 30 && $ax.globalVariableProvider.getVariableValue('dragtime') < 1000) {
                $ax.event.raiseSyntheticEvent(widgetDragInfo.widgetId, "onSwipeRight");
            }

            var totalDragY = $ax.globalVariableProvider.getVariableValue('totaldragy');
            if(totalDragY < -30 && $ax.globalVariableProvider.getVariableValue('dragtime') < 1000) {
                $ax.event.raiseSyntheticEvent(widgetDragInfo.widgetId, "onSwipeUp");
            }

            if(totalDragY > 30 && $ax.globalVariableProvider.getVariableValue('dragtime') < 1000) {
                $ax.event.raiseSyntheticEvent(widgetDragInfo.widgetId, "onSwipeDown");
            }

            if(widgetDragInfo.cursorChanged) {
                window.document.body.style.cursor = widgetDragInfo.oldBodyCursor;
                var widget = window.document.getElementById(widgetDragInfo.widgetId);
                // It may be null if OnDragDrop filtered out the widget
                if(widget != null) widget.style.cursor = widgetDragInfo.oldCursor;
                //we don't seems need to reset nicescroll cursor on container, nicescroll seems updates its cursor 
                // if(widgetDragInfo.oldNiceScrollContainerCursor != undefined) {
                //     var niceScrollContainer = $ax.adaptive.getNiceScrollContainer(widget);
                //     if(niceScrollContainer) niceScrollContainer.style.cursor = widgetDragInfo.oldNiceScrollContainerCursor;
                //     widgetDragInfo.oldNiceScrollContainerCursor = undefined;
                // }
                widgetDragInfo.cursorChanged = undefined;
            }

            if(widgetDragInfo.targetWidget == tg && !event.changedTouches) {
                // suppress the click after the drag on desktop browsers
                if(IE_10_AND_BELOW && widgetDragInfo.targetWidget) {
                    $ax.event.addEvent(widgetDragInfo.targetWidget, 'click', _suppressClickAfterDrag, true, true);
                    $ax.event.addEvent(widgetDragInfo.targetWidget, "onmousemove", _removeSuppressEvents, true, true);
                } else {
                    $ax.event.addEvent(document, "click", _suppressClickAfterDrag, true);
                    $ax.event.addEvent(document, "mousemove", _removeSuppressEvents, true);

                }
            }
        }

        widgetDragInfo.hasDragged = false;
        widgetDragInfo.movedWidgets = new Object();
        widgetDragInfo.started = false;

        return false;
    };

    $ax.drag.GetDragX = function() {
        if(widgetDragInfo.hasDragged) return widgetDragInfo.xDelta;
        return 0;
    };

    $ax.drag.GetDragY = function() {
        if(widgetDragInfo.hasDragged) return widgetDragInfo.yDelta;
        return 0;
    };

    $ax.drag.GetTotalDragX = function() {
        if(widgetDragInfo.hasDragged) return widgetDragInfo.currentX - widgetDragInfo.cursorStartX;
        return 0;
    };

    $ax.drag.GetTotalDragY = function() {
        if(widgetDragInfo.hasDragged) return widgetDragInfo.currentY - widgetDragInfo.cursorStartY;
        return 0;
    };

    $ax.drag.GetDragTime = function() {
        if(widgetDragInfo.hasDragged) return widgetDragInfo.currentTime - widgetDragInfo.startTime;
        return 600000;
    };

    $ax.drag.LogMovedWidgetForDrag = function (id, dragInfo) {
        dragInfo = dragInfo || widgetDragInfo;
        if(dragInfo.hasDragged) {
            var containerIndex = id.indexOf('_container');
            if(containerIndex != -1) id = id.substring(0, containerIndex);

            // If state or other non-widget id, this should not be dragged, and should exit out to avoid exceptions.
            if(!$obj(id)) return;

            var query = $ax('#' + id);
            //var x = query.left();
            //var y = query.top();
            var viewportLocation = query.viewportLocation();
            var x =  viewportLocation.left;
            var y = viewportLocation.top;

            var movedWidgets = dragInfo.movedWidgets;
            if(!movedWidgets[id]) {
                movedWidgets[id] = new Location(x, y);
            }
        }
    };

    var Location = function(x, y) {
        this.x = x;
        this.y = y;
    };
    $ax.drag.location = Location;

    var Rectangle = $ax.drag.Rectangle = function(x, y, width, height) {
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
        this.right = x + width;
        this.bottom = y + height;
    };

    Rectangle.prototype.IntersectsWith = function(rect) {
        if(this.Invalid()) return false;
        if(rect.length) {
            for(var i = 0; i < rect.length; i++) if(!rect[i].Invalid && this.IntersectsWith(rect[i])) return true;
            return false;
        }
        if(rect.Invalid()) return false;
        return this.x < rect.right && this.right > rect.x && this.y < rect.bottom && this.bottom > rect.y;
    };

    Rectangle.prototype.Invalid = function() {
        return this.x == -1 && this.y == -1 && this.width == -1 && this.height == -1;
    };

    Rectangle.prototype.Move = function(x, y) {
        return new Rectangle(x, y, this.width, this.height);
    };
});