What are the parameters of addTouchEventListener

Question

I created class for uiButton creation, there is three function as following; I created button class there is 3 function in class as following;

void MyButtonClass::Create(const std::string &buttonImage, cocos2d::Layer *layer)
{
    myButton = ui::Button::create(buttonImage, buttonImage);
    layer->addChild(myButton, 100);
}

void MyButtonClass::SetPosition(float xPosition, float yPosition)
{
    myButton->cocos2d::Node::setPosition(xPosition, yPosition);
}

 void MyButtonClass::SetTouchListener(Ref *sender, SEL_TouchEvent *selector)//There is problem
{
    myButton->addTouchEventListener(sender, selector);
}

How can I set TouchListener? I looked parameters from library but it is not working.

for example create button from my gamescene;

button.Create("Play.png", this);
button.SetPosition(100, 200);
button.SetTouchListener(CC_CALLBACK_1(GameScene::Play, this));//Exception: No viable conversion from '__bind<void (GameScene::*)(cocos2d::Ref *), GameScene *, std::__1::placeholders::__ph<1> &>' to 'cocos2d::Ref *'

Answer 1

I think you used the wrong overload for your situation. You'll want to use the void addTouchEventListener (const ccWidgetTouchCallback &callback) overload. The reason this doesn't work is because no callback is bound to myButton. You need to bind a custom callback:

Assuming your button class inherits from a ::cocos2d::ui::Button or ::cocos2d::ui::Widget, you need to assign a callback with the Widget::addTouchEventListener() method.

myButton->addTouchEventListener(this, toucheventselector(MyButtonClass::touchEvent));

The callback MyButtonClass::touchEvent will be invoked when a touchevent for the button is received.

For example:

void MyButtonClass::SetTouchListener(Ref *sender, SEL_TouchEvent *selector)//There is problem
{
    myButton->addTouchEventListener([](Ref*, Widget::TouchEventType){
        // Simple callback for touch
        int n = 0;
    });
}

EDIT

The alternative is to use the methods in myButton by setting one or more of the following:

onTouchBegan (Touch *touch, Event *unusedEvent)
onTouchMoved (Touch *touch, Event *unusedEvent)
onTouchEnded (Touch *touch, Event *unusedEvent)
onTouchCancelled (Touch *touch, Event *unusedEvent)

Check out the codos2d-x doc for the ui::Button class There is also an example of onTouchBegan and onTouchEnded here. Instead of listener1 in this example, you can use myButton.