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cocos2d-X 节点（LayoutExecutant.h）API

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绑定一个 Layout 到 LayoutExecutant. 初始化并分配一个 LayoutExecutant

///cocos2d-x-3.0alpha0/extensions/CocoStudio/GUI/Layouts
// 绑定一个 Layout 到 LayoutExecutant. 初始化并分配一个 LayoutExecutant

#ifndef __LAYOUTEXECUTANT_H__
#define __LAYOUTEXECUTANT_H__

#include "LayoutParameter.h"

NS_CC_EXT_BEGIN

typedef enum
{
    LAYOUT_DEFAULT,
    LAYOUT_LINEAR_VERTICAL,
    LAYOUT_LINEAR_HORIZONTAL,
    LAYOUT_RELATIVE
}LayoutType;

class Layout;

class LayoutExecutant : public Object
{
public:
    /**
     * Default constructor
     */
    LayoutExecutant() : _layout(NULL){_layoutType = LAYOUT_DEFAULT;};
    
    /**
     * Default destructor
     */
    virtual ~LayoutExecutant(){_layout = NULL;};
    
    /**
     * 为了做布局。需要重写。
     */
    virtual void doLayout()=0;
    
    /**
     * Gets LayoutType.
     *
     * @see LayoutType
     *
     * @return LayoutType
     */
    LayoutType getLayoutType(){return _layoutType;};
    
    /**
     * 绑定一个 Layout 到 LayoutExecutant.
     *
     * @param Layout
     */
    void setLayout(Layout* layout);
    
    /**
     *获取LayoutExecutant的布局。         //执行者布局
     *
     * @return Layout
     */
    Layout* getLayout() const;
protected:
    LayoutType _layoutType;
    Layout* _layout;
};

class LinearVerticalLayoutExecutant : public LayoutExecutant
{
public:
    /**
     * Default constructor
     */
    LinearVerticalLayoutExecutant(){_layoutType = LAYOUT_LINEAR_VERTICAL;};
    
    /**
     * Default destructor
     */
    virtual ~LinearVerticalLayoutExecutant(){};
    
    /**
     * Allocates and initializes.
     * @return 返回一个初始化的被标记为自动释放的 LayoutExecutant
     */
    static LinearVerticalLayoutExecutant* create();
    
    //To do layout.
    virtual void doLayout();
};

class LinearHorizontalLayoutExecutant : public LayoutExecutant
{
public:
    /**
     * Default constructor
     */
    LinearHorizontalLayoutExecutant(){_layoutType = LAYOUT_LINEAR_HORIZONTAL;};
    
    /**
     * Default destructor
     */
    virtual ~LinearHorizontalLayoutExecutant(){};
    
    /**
     * 分配并初始化.
     * @return 返回一个初始化的被标记为自动释放的 LayoutExecutant
     */
    static LinearHorizontalLayoutExecutant* create();
    
    //To do layout.
    virtual void doLayout();
};

class RelativeLayoutExecutant : public LayoutExecutant
{
public:
    /**
     * Default constructor
     */
    RelativeLayoutExecutant(){_layoutType = LAYOUT_RELATIVE;};
    
    /**
     * Default destructor
     */
    virtual ~RelativeLayoutExecutant(){};
    
    /**
     *  分配并初始化
     * @return 返回一个初始化的被标记为自动释放的 LayoutExecutant
     */
    static RelativeLayoutExecutant* create();
    
    //To do layout.
    virtual void doLayout();
};

NS_CC_EXT_END

#endif /* defined(__LayoutExecutant__) */