Add Touch Up Callback in MenuItem for Make own GamePad in cocos2d-x v3.0beta0

MyMenuItemLabel.cpp

#include "MyMenuItemLabel.h"

MyMenuItemLabel *MyMenuItemLabel::create(Node*label, const ccMenuCallback& selected, const ccMenuCallback& unselected) {
    
    MyMenuItemLabel *ret = new MyMenuItemLabel();
    ret->initWithLabel(label, selected, unselected);
    ret->autorelease();
    return ret;
}

bool MyMenuItemLabel::initWithLabel(Node* label, const ccMenuCallback& selected, const ccMenuCallback& unselected) {
    super::initWithLabel(label, [](Object *){});
    _selectedCallback = selected;
    _unselectedCallback = unselected;
    
    return true;
}

void MyMenuItemLabel::selected() {
    super::selected();
    _selectedCallback(this);
}

void MyMenuItemLabel::unselected() {
    super::unselected();
    _unselectedCallback(this);
}

MyMenuItemLabel.h

#ifndef __Defense__MyMenuItemLabel__
#define __Defense__MyMenuItemLabel__

#include "cocos2d.h"

using namespace cocos2d;

class MyMenuItemLabel : public MenuItemLabel {
    typedef MenuItemLabel super;
public:
    static MyMenuItemLabel * create(Node*label, const ccMenuCallback& selected, const ccMenuCallback& unselected);

    bool initWithLabel(Node* label, const ccMenuCallback& selected, const ccMenuCallback& unselected);
    
    void unselected() override;
    void selected() override;
    
private:
	ccMenuCallback _selectedCallback;
	ccMenuCallback _unselectedCallback;
};

#endif /* defined(__Defense__MyMenuItemLabel__) */