cocostudio 事件穿透(coco2dx 3.2)

来源：互联网发布：wpsh5是什么软件编辑：程序博客网时间：2024/05/01 19:34

因为经常需要让事件穿透到下一层的scrollview.可在cocostudio 中默认并没有开启事件穿透.查看原代码看到直接setSwallowTouches为true了.

对UIWidget做出如下的处理

在UIWidget.h中加入三个成员变量用与控制事件穿透

//UIWidget.h中的改动

public:/** * Sets whether the widget swallow touches * the default value is true * @param needSwallow true if the widget is need to swallow touches * @param always false if the widget will swallow touches only when hitTest success */void setSwallowTouches(bool needSwallow,bool always = true);private:bool _swallowTouches;//控制是否需要穿透bool _penetrateTouchesAlways;//用于决定是否总是穿透.bool _hadMoveOutHitArea;//用于判断是否在移动过程中移出点击区域

//UIWidget.cpp中的改动

void Widget::setSwallowTouches(bool needSwallow,bool always/* = true*/){if (_touchListener){_touchListener->setSwallowTouches(needSwallow);}_swallowTouches = needSwallow;_penetrateTouchesAlways = always;}bool Widget::onTouchBegan(Touch *touch, Event *unusedEvent){    _hitted = false;    if (isVisible() && isEnabled() && isAncestorsEnabled() && isAncestorsVisible(this) )    {        _touchBeganPosition = touch->getLocation();        if(hitTest(_touchBeganPosition) && isClippingParentContainsPoint(_touchBeganPosition))        {            _hitted = true;        }    }    if (!_hitted)    {        return false;    }    setHighlighted(true);    Widget* widgetParent = getWidgetParent();    if (widgetParent)    {        widgetParent->interceptTouchEvent(TouchEventType::BEGAN, this, touch);    }    pushDownEvent();// if (!_penetrateTouchesAlways)// {// _touchListener->setSwallowTouches(true);// log("beginning~~~~~~~~~~~~~~~~~~~~~~~~~~~~");// }_hadMoveOutHitArea = false;    return true;}void Widget::onTouchMoved(Touch *touch, Event *unusedEvent){    _touchMovePosition = touch->getLocation();if (hitTest(_touchMovePosition)){setHighlighted(true);if (!_swallowTouches && !_penetrateTouchesAlways && !_hadMoveOutHitArea)_touchListener->setSwallowTouches(true);}else{setHighlighted(false);if (!_swallowTouches && !_penetrateTouchesAlways){_touchListener->setSwallowTouches(false);_hadMoveOutHitArea = true;}}        Widget* widgetParent = getWidgetParent();    if (widgetParent)    {        widgetParent->interceptTouchEvent(TouchEventType::MOVED, this, touch);    }    moveEvent();}void Widget::onTouchEnded(Touch *touch, Event *unusedEvent){    bool highlight = _highlight;        setHighlighted(false);    if (!_swallowTouches && !_penetrateTouchesAlways){_touchListener->setSwallowTouches(false);if (_hadMoveOutHitArea)return;}    _touchEndPosition = touch->getLocation();        Widget* widgetParent = getWidgetParent();    if (widgetParent)    {        widgetParent->interceptTouchEvent(TouchEventType::ENDED, this, touch);    }        if (highlight)    {        releaseUpEvent();    }    else    {        cancelUpEvent();    }}

通过以上的修改,如果需要在extentions::scrollview中加入 widget.把widget->setSwallowTouches(false,false);就能得到一个很顺的效果

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