RedCore/cocos2d/cocos/ui/UITabControl.h

/****************************************************************************
 Copyright (c) 2015-2017 Chukong Technologies Inc.
 
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 Permission is hereby granted, free of charge, to any person obtaining a copy
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 all copies or substantial portions of the Software.
 
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 THE SOFTWARE.
 ****************************************************************************/


#ifndef __UITABVIEW_H__
#define __UITABVIEW_H__

#include "ui/UIAbstractCheckButton.h"
#include "ui/UIWidget.h"

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

class Label;

namespace ui {
    
    class Layout;
    class TabControl;
    /**
     * the header button in TabControl
     */
    class CC_GUI_DLL TabHeader : public AbstractCheckButton
    {
        friend class TabControl;
        
    public:

        enum class EventType
        {
            SELECTED,
            UNSELECTED
        };
        
        
        /**
         * Create and return a empty TabHeader instance pointer.
         */
        static TabHeader* create();
        
        /**
         * factory method to create a TabHeader instance.
         * This method uses less resource to create a TabHeader.
         * @param titleStr The text on the TabHeader
         * @param backGround The background image name in `std::string`.
         * @param cross The cross image name in `std::string`.
         * @param texType  The texture's resource type in `Widget::TextureResType`.
         * @return A TabHeader instance pointer
         */
        static TabHeader* create(const std::string& titleStr,
                                 const std::string& backGround,
                                 const std::string& cross,
                                 TextureResType texType = TextureResType::LOCAL);
        
        /**
        * Create a TabHeader with various images.
        * @param titleStr The text on the TabHeader
        * @param backGround    backGround texture.
        * @param backGroundSelected    backGround selected state texture.
        * @param cross    cross texture.
        * @param backGroundDisabled    backGround disabled state texture.
        * @param frontCrossDisabled    cross dark state texture.
        * @param texType    @see `Widget::TextureResType`
        *
        * @return A TabHeader instance pointer.
        */
        static TabHeader* create(const std::string& titleStr,
                                 const std::string& backGround,
                                 const std::string& backGroundSelected,
                                 const std::string& cross,
                                 const std::string& backGroundDisabled,
                                 const std::string& frontCrossDisabled,
                                 TextureResType texType = TextureResType::LOCAL);
        /**
         * Return the inner Label renderer of TabHeader.
         * @return The TabHeader Label.
         */
        Label* getTitleRenderer()const;
        
        /**
         * Change the content of Header's text.
         *@param text The Header's text.
         */
        void setTitleText(const std::string& text);
        
        /**
         * get the TabHeader text
         *@return he TabHeader text
         */
        std::string getTitleText() const;
        
        /**
         * Change the color of he TabHeader text
         *@param color The he TabHeader text's color in Color4B.
         */
        void setTitleColor(const Color4B& color);
        
        /**
         * get the TabHeader text color.
         *@return Color4B of TabHeader text.
         */
        const Color4B& getTitleColor() const;
        
        /**
         * Change the font size of TabHeader text
         *@param size TabHeader text's font size in float.
         */
        void setTitleFontSize(float size);
        
        /**
         * get the font size of TabHeader text
         *@return TabHeader text's font size in float.
         */
        float getTitleFontSize() const;
        
        /**
         * Change the font name of TabHeader text
         *@param fontName a font name string.
         */
        void setTitleFontName(const std::string& fontName);
        
        /**
         * get the font name of TabHeader text
         *@return font name in std::string
         */
        std::string getTitleFontName() const;
        
        /**
         * get the index this header in the TabControl
         * @return -1 means not in any TabControl
         */
        int   getIndexInTabControl() const;
        
        
    protected:
        TabHeader();
        ~TabHeader();
        
        virtual void initRenderer() override;
        virtual void onSizeChanged() override;
        
        void updateContentSize();
        
        virtual void releaseUpEvent() override;
        void dispatchSelectChangedEvent(bool select) override;
        
        virtual void copySpecialProperties(Widget* model) override;
        
    private:
        Label*       _tabLabelRender;
        float        _tabLabelFontSize;
        TabControl*  _tabView;
        
        typedef std::function<void(int tabindex, TabHeader::EventType)> ccTabCallback;
        ccTabCallback  _tabSelectedEvent;

        enum class FontType
        {
            SYSTEM,
            TTF,
            BMFONT
        };
        FontType  _fontType;
    };

    /**
    * TabControl, use header button switch container
    */
    class CC_GUI_DLL TabControl : public Widget
    {
    public:
        enum class Dock
        {
            TOP,
            LEFT,
            BOTTOM,
            RIGHT
        };

        enum class EventType
        {
            SELECT_CHANGED,
        };
        
        typedef std::function<void(int tabIndex, EventType)> ccTabControlCallback;
        
        static TabControl* create();
        
        /// @{
        /// @name behaviours
        
        /**
         * remove the tab from this TabControl
         * @param index The index of tab
         */
        void      removeTab(int index);
        
        /**
         * set tab selected, switch the current selected tab and visible container
         * @param index The index of tab
         */
        void      setSelectTab(int index);
        
        /**
         * set tab selected, switch the current selected tab and visible container
         * @param tabHeader The tab instance
         */
        void      setSelectTab(TabHeader* tabHeader);
        
        /**
         * get TabHeader
         * @param index The index of tab
         */
        TabHeader* getTabHeader(int index) const;
        
        /**
         * get Container
         * @param index The index of tab
         */
        Layout*   getTabContainer(int index) const;
        
        /**
         * insert tab, and init the position of header and container
         * @param index The index tab should be
         * @param header The header Button, will be a protected child in TabControl
         * @param container The container, will be a protected child in TabControl
         */
        void      insertTab(int index, TabHeader* header, Layout* container);
        
        /**
        * get the count of tabs in this TabControl
        * @return the count of tabs
        */
        size_t    getTabCount() const;
        
        /**
        * get current selected tab's index
        * @return the current selected tab index
        */
        int getSelectedTabIndex() const;

        /**
        * get the index of tabCell in TabView, return -1 if not exists in.
        * @return the index of tabCell in TabView, `-1` means not exists in.
        */
        int indexOfTabHeader(const TabHeader* tabCell) const;

        /**
        * Add a callback function which would be called when selected tab changed
        *@param callback A std::function with type @see `ccTabControlCallback`
        */
        void setTabChangedEventListener(const ccTabControlCallback& callback);
        /// @}

        /// @{
        /// @ properties

        /**
        * set header width, affect all tab
        * @param headerWidth each tab header's width
        */
        void  setHeaderWidth(float headerWidth);

        /**
        * get tab header's width
        * @return header's width
        */
        float getHeaderWidth() const { return _headerWidth; }

        /**
        * set header height, affect all tab
        * @param headerHeight each tab header's height
        */
        void  setHeaderHeight(float headerHeight);

        /**
        * get tab header's height
        * @return header's height
        */
        int   getHeaderHeight() const { return _headerHeight; }

        /**
        * ignore the textures' size in header, scale them with _headerWidth and _headerHeight
        * @param ignore is `true`, the header's texture scale with _headerWidth and _headerHeight
        *        ignore is `false`, use the texture's size, do not scale them
        */
        void  ignoreHeadersTextureSize(bool ignore);

        /**
        * get whether ignore the textures' size in header, scale them with _headerWidth and _headerHeight
        * @return whether ignore the textures' size in header
        */
        bool  isIgnoreHeadersTextureSize() const { return _ignoreHeaderTextureSize; };

        /**
        * set the delta zoom of selected tab
        * @param zoom The delta zoom
        */
        void  setHeaderSelectedZoom(float zoom);

        /**
        * get the delta zoom of selected tab
        * @return zoom, the delta zoom
        */
        float getHeaderSelectedZoom() const { return _currentHeaderZoom; }

        /**
        * the header dock place of header in TabControl
        * @param dockPlace The strip place
        */
        void         setHeaderDockPlace(TabControl::Dock dockPlace);
        TabControl::Dock getHeaderDockPlace() const { return _headerDockPlace; }

        /// @}
    protected:
        TabControl();
        ~TabControl();

        void onSizeChanged() override;
        void initTabHeadersPos(int startIndex);
        void initContainers();
        virtual void copySpecialProperties(Widget* model) override;

        ccTabControlCallback _tabChangedCallback;
        // dispatch selected changed
        void dispatchSelectedTabChanged(int tabIndex, TabHeader::EventType eventType);
    private:

        typedef struct CellContainer
        {
            TabHeader* header;
            Layout*        container;

            CellContainer(TabHeader* headerCell, Layout* layout)
            {
                header = headerCell;
                container = layout;
            }
        } TabItem;

        // format tab header and container after insert
        void initAfterInsert(int index);
        void activeTabItem(TabItem* item);
        void deactiveTabItem(TabItem* item);
        Vec2 getHeaderAnchorWithDock() const;

        TabItem*    _selectedItem;

        int         _headerHeight;
        int         _headerWidth;
        Dock        _headerDockPlace;
        Vec2        _containerPosition;
        Size        _containerSize;
        float       _currentHeaderZoom;
        bool        _ignoreHeaderTextureSize;

        // for index the cells and containers
        std::vector<TabItem*> _tabItems;
    };
}
// end group
/// @}
NS_CC_END

#endif // __UITABVIEW_H__