cocos2d-x tree 控件实现

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闲来无聊码码代码哈哈

使用的是cocos2d-x 3.12

支持无限层，滚动条，可以直接用，可以直接用了，代码在细节上还可以调整调整

上传时TreeNode 头文件有几个没用到的函数，漏删除了，可以自己删除掉

使用如下:

//1

Tree* _tree = Tree::create();
_tree->setPosition(Vec2(100, 100));
this->addChild(_tree);
_tree->setContentSize(Size(150, 100));
_tree->createRoot("root", 120, 22, 0, true);

_tree->addFirstLayerNode("A", 120, 22);
_tree->addFirstLayerNode("B", 120, 22);
_tree->addFirstLayerNode("C", 120, 22);

_tree->addSecondLayerNode(0, "AA", 120, 22);

_tree->addSecondLayerNode(1, "BA", 120, 22);
_tree->addSecondLayerNode(1, "BB", 120, 22);

_tree->addSecondLayerNode(2, "CA", 120, 22);
_tree->addSecondLayerNode(2, "CB", 120, 22);
_tree->addSecondLayerNode(2, "CC", 120, 22);

//2

cocos2d::EventListenerCustom* _listener = EventListenerCustom::create("TreeSelected", CC_CALLBACK_1(HelloWorld::selectedHandler, this));
_tree->getRootNode()->getEventDispatcher()->addEventListenerWithFixedPriority(_listener, 1);

//3

void HelloWorld::selectedHandler(EventCustom* e)
{
static_cast<TreeNode*>(e->getUserData())->getValue();

}

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