India/cocos2d-x/cocos/ui/UILayoutComponent.h

/****************************************************************************
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

http://www.cocos2d-x.org

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#ifndef __cocos2d_libs__LayoutComponent__
#define __cocos2d_libs__LayoutComponent__
#include "2d/CCComponent.h"
#include "ui/GUIExport.h"

NS_CC_BEGIN
/**
 * @addtogroup ui
 * @{
 */

namespace ui {
    /**
     *@brief A component class used for layout.
     * The LayoutComponent holds all the data for layouting.
     */
    class CC_GUI_DLL LayoutComponent : public Component
    {
    public:
        /**
         * Default constructor
         *
         * @lua new
         */
        LayoutComponent();

        /**
         * Default destructor
         *
         * @lua NA
         */
        ~LayoutComponent();

        virtual bool init()override;

        /**
         * Create a LayoutComponent instance with default settings.
         */
        CREATE_FUNC(LayoutComponent);

        /**
         * Bind a LayoutComponent to a specified node.
         * If the node has already binded a LayoutComponent named __LAYOUT_COMPONENT_NAME, just return the LayoutComponent.
         * Otherwise, create a new LayoutComponent and bind the LayoutComponent to the node.
         *@param node A Node* instance pointer.
         *@return The binded LayoutComponent instance pointer.
         */
        static LayoutComponent* bindLayoutComponent(Node* node);

        /**
         * Horizontal dock position type.
         */
        enum class HorizontalEdge
        {
            None,
            Left,
            Right,
            Center
        };

        /**
         * Vertical dock position type.
         */
        enum class VerticalEdge
        {
            None,
            Bottom,
            Top,
            Center
        };

        /**
         * Percent content size is used to adapt node's content size based on parent's content size.
         * If set to true then node's content size will be changed based on the value set by @see setPercentContentSize
         *@param isUsed True to enable percent content size, false otherwise.
         */
        void setUsingPercentContentSize(bool isUsed);

        /**
         * Query whether use percent content size or not.
         *@return True if using percent content size, false otherwise.
         */
        bool getUsingPercentContentSize()const;

        /**
         * Set percent content size.
         * The value should be [0-1], 0 means the child's content size will be 0
         * and 1 means the child's content size is the same as its parents.
         *@param percent The percent (x,y) of the node in [0-1] scope.
         */
        void setPercentContentSize(const Vec2 &percent);

        /**
         * Query the percent content size value.
         *@return Percent (x,y) in Vec2.
         */
        Vec2 getPercentContentSize()const;

        /**
         * Query the anchor position.
         *@return Anchor position to it's parent
         */
        const Point& getAnchorPosition()const;

        /**
         * Change the anchor position to it's parent.
         *@param point A value in (x,y) format.
         */
        void setAnchorPosition(const Point& point);

        /**
         * Query the owner's position.
         *@return The owner's position.
         */
        const Point& getPosition()const;

        /**
         * Change the position of component owner.
         * @param position A position in (x,y)
         */ 
        void setPosition(const Point& position);

        /**
         * Whether position percentX is enabled or not. 
         *@return True if position percentX is enable, false otherwise.
         */
        bool isPositionPercentXEnabled()const;
        
        /**
         * Toggle position percentX enabled.
         *@param isUsed  True if enable position percentX, false otherwise.
         */
        void setPositionPercentXEnabled(bool isUsed);

        /**
         * Query the position percent X value.
         *@return Position percent X value in float.
         */
        float getPositionPercentX()const;

        /**
         * Change position percent X value.
         *@param percentMargin Margin in float.
         */
        void setPositionPercentX(float percentMargin);

        /**
         * Whether position percentY is enabled or not.
         *@see `setPositionPercentYEnabled`
         *@return True if position percentY is enabled, false otherwise.
         */
        bool isPositionPercentYEnabled()const;

        /**
         * Toggle position percentY enabled.
         *@param isUsed True if position percentY is enabled, false otherwise.
         */
        void setPositionPercentYEnabled(bool isUsed);

        /**
         * Query the position percentY Y value.
         *@return Position percent Y value in float.
         */
        float getPositionPercentY()const;

        /**
         * Change position percentY value.
         *@param percentMargin Margin in float.
         */
        void setPositionPercentY(float percentMargin);

        /**
         * Query element horizontal dock type.
         *@return Horizontal dock type.
         */
        HorizontalEdge getHorizontalEdge()const;

        /**
         * Change element's horizontal dock type.
         *@param hEage Horizontal dock type @see `HorizontalEdge`
         */
        void setHorizontalEdge(HorizontalEdge hEage);

        /**
         * Query element vertical dock type.
         *@return Vertical dock type.
         */
        VerticalEdge getVerticalEdge()const;

        /**
         * Change element's vertical dock type.
         *@param vEage Vertical dock type @see `VerticalEdge`.
         */
        void setVerticalEdge(VerticalEdge vEage);

        /**
         * Query left margin of owner relative to its parent.
         *@return Left margin in float.
         */
        float getLeftMargin()const;

        /**
         * Change left margin of owner relative to its parent.
         *@param margin Margin in float.
         */
        void setLeftMargin(float margin);

        /**
         * Query the right margin of owner relative to its parent.
         *@return Right margin in float.
         */
        float getRightMargin()const;

        /**
         * Change right margin of owner relative to its parent.
         *@param margin Margin in float.
         */
        void setRightMargin(float margin);

        /**
         * Query the top margin of owner relative to its parent.
         *@return Top margin in float.
         */
        float getTopMargin()const;

        /**
         * Change the top margin of owner relative to its parent.
         *@param margin Margin in float.
         */
        void setTopMargin(float margin);

        /**
         * Query the bottom margin of owner relative to its parent.
         *@return Bottom margin in float.
         */
        float getBottomMargin()const;

        /**
         * Change the bottom margin of owner relative to its parent.
         *@param margin in float.
         */
        void setBottomMargin(float margin);

        /**
         * Query owner's content size.
         *@return Owner's content size.
         */
        const Size& getSize()const;

        /**
         * Change the content size of owner.
         *@param size Content size in @see `Size`.
         */
        void setSize(const Size& size);

        /**
         * Query whether percent width is enabled or not.
         *@return True if percent width is enabled, false, otherwise.
         */
        bool isPercentWidthEnabled()const;

        /**
         * Toggle enable percent width.
         *@param isUsed True if percent width is enabled, false otherwise.
         */
        void setPercentWidthEnabled(bool isUsed);

        /**
         * Query content size width of owner.
         *@return Content size width in float.
         */
        float getSizeWidth()const;

        /**
         * Change content size width of owner.
         *@param width Content size width in float.
         */
        void setSizeWidth(float width);

        /**
         * Query percent width of owner.
         *@return percent width in float.
         */
        float getPercentWidth()const;

        /**
         * Change percent width of owner.
         *@param percentWidth Percent Width in float.
         */
        void setPercentWidth(float percentWidth);

        /**
         * Query whether percent height is enabled or not.
         *@return True if percent height is enabled, false otherwise.
         */
        bool isPercentHeightEnabled()const;

        /**
         * Toggle enable percent height.
         *@param isUsed True if percent height is enabled, false otherwise.
         */
        void setPercentHeightEnabled(bool isUsed);

        /**
         * Query size height of owner.
         *@return Size height in float.
         */
        float getSizeHeight()const;

        /**
         * Change size height of owner.
         *@param height Size height in float.
         */
        void setSizeHeight(float height);

        /**
         * Query percent height of owner.         
         *@return Percent height in float.
         */
        float getPercentHeight()const;

        /**
         * Change percent height value of owner.
         *@param percentHeight Percent height in float.
         */
        void setPercentHeight(float percentHeight);

        /**
         * Query whether stretch width is enabled or not.
         *@return True if stretch width is enabled, false otherwise.
         */
        bool isStretchWidthEnabled()const;

        /**
         * Toggle enable stretch width.
         *@param isUsed True if enable stretch width, false otherwise.
         */
        void setStretchWidthEnabled(bool isUsed);

        /**
         * Query whether stretch height is enabled or not.
         *@return True if stretch height is enabled, false otherwise.
         */
        bool isStretchHeightEnabled()const;

        /**
         * Toggle enable stretch height.
         *@param isUsed True if stretch height is enabled, false otherwise.
         */
        void setStretchHeightEnabled(bool isUsed);
        
        /**
         * Toggle enable percent only.
         *@param enable True if percent only is enabled, false otherwise.
         */
        void setPercentOnlyEnabled(bool enable);

        /**
         * Toggle active enabled of LayoutComponent's owner.
         *@param enable True if active layout component, false otherwise.
         */
        void setActiveEnabled(bool enable);

        /**
         * Refresh layout of the owner.
         */
        void refreshLayout();

    protected:
        Node* getOwnerParent();
        void refreshHorizontalMargin();
        void refreshVerticalMargin();
    protected:
        HorizontalEdge  _horizontalEdge;
        VerticalEdge    _verticalEdge;

        float           _leftMargin;
        float           _rightMargin;
        float           _bottomMargin;
        float           _topMargin;

        bool            _usingPositionPercentX;
        float           _positionPercentX;
        bool            _usingPositionPercentY;
        float           _positionPercentY;

        bool            _usingStretchWidth;
        bool            _usingStretchHeight;

        float           _percentWidth;
        bool            _usingPercentWidth;
        
        float           _percentHeight;
        bool            _usingPercentHeight;

        bool            _actived;
        bool            _isPercentOnly;
    };
}

// end of ui group
/// @}
NS_CC_END
#endif /* defined(__cocos2d_libs__LayoutComponent__) */