cocos2dx CCControlSlider

// on "init" you need to initialize your instance
bool ControlSlider01::init()
{
//////////////////////////////
// 1. super init first
if ( !MenuLayer::init() )
{
return false;
}

CCSize screenSize = CCDirector::sharedDirector()->getWinSize();

// Add the slider
CCControlSlider *slider = CCControlSlider::create("extensions/sliderTrack.png","extensions/sliderProgress.png" ,"extensions/sliderThumb.png");
slider->setAnchorPoint(ccp(0.5f, 1.0f));
slider->setMinimumValue(0.0f); // Sets the min value of range
slider->setMaximumValue(5.0f); // Sets the max value of range
slider->setPosition(ccp(screenSize.width / 2.0f, screenSize.height / 2.0f + 16));
slider->setTag(1);

// When the value of the slider will change, the given selector will be call
slider->addTargetWithActionForControlEvents(this, cccontrol_selector(ControlSlider01::valueChanged), CCControlEventValueChanged);

CCControlSlider *restrictSlider = CCControlSlider::create("extensions/sliderTrack.png","extensions/sliderProgress.png" ,"extensions/sliderThumb.png");
restrictSlider->setAnchorPoint(ccp(0.5f, 1.0f));
restrictSlider->setMinimumValue(0.0f); // Sets the min value of range
restrictSlider->setMaximumValue(5.0f); // Sets the max value of range
restrictSlider->setMaximumAllowedValue(4.0f);
restrictSlider->setMinimumAllowedValue(1.5f);
restrictSlider->setValue(3.0f);
restrictSlider->setPosition(ccp(screenSize.width / 2.0f, screenSize.height / 2.0f - 24));
restrictSlider->setTag(2);

//same with restricted
restrictSlider->addTargetWithActionForControlEvents(this, cccontrol_selector(ControlSlider01::valueChanged), CCControlEventValueChanged);

addChild(slider);
addChild(restrictSlider);
return true;

}

void ControlSlider01::valueChanged(CCObject* obj, CCControlEvent)
{
CCControlSlider* slider = (CCControlSlider*)obj;
float val = slider->getValue();
CCLOG("%f", val);
}