axmol/cocos/ui/UIHelper.h

/****************************************************************************
Copyright (c) 2013-2014 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#ifndef __UIHELPER_H__
#define __UIHELPER_H__

#include <string>
#include "platform/CCPlatformMacros.h"
#include "ui/GUIExport.h"
#include "2d/CCNode.h"

NS_CC_BEGIN

namespace ui {
    
    class Widget;

/**
*   @js NA
*   @lua NA
*/
class CC_GUI_DLL Helper
{
public:
    /**
     * Finds a widget whose tag equals to param tag from root widget.
     *
     * @param root      widget which will be seeked.
     *
     * @tag             tag value.
     *
     * @return finded result.
     */
    static Widget* seekWidgetByTag(Widget* root, int tag);
    
    /**
     * Finds a widget whose name equals to param name from root widget.
     *
     * @param root      widget which will be seeked.
     *
     * @name             name value.
     *
     * @return finded result.
     */
    static Widget* seekWidgetByName(Widget* root, const std::string& name);
    
    /*temp action*/
    static Widget* seekActionWidgetByActionTag(Widget* root, int tag);
    
    /**
     * @brief Get a UTF8 substring from a std::string with a given start position and length
     *  Sample:  std::string str = "中国中国中国";  substr = getSubStringOfUTF8String(str,0,2) will = "中国"
     * @param start The start position of the substring.
     * @param length The length of the substring in UTF8 count
     * @return a UTF8 substring
     */
    static std::string getSubStringOfUTF8String(const std::string& str,
                                   std::string::size_type start,
                                   std::string::size_type length);
    
    /**
     * Refresh object and it's children layout state
     *
     *@param rootNode   object which will be changed
     *
     */
    static void doLayout(Node *rootNode);

    static void changeLayoutSystemActiveState(bool bActive);
    
    /**
     *@brief  restrict capInsetSize, when the capInsets's width is larger than the textureSize, it will restrict to 0,
     *        the height goes the same way as width.
     *@param  capInsets A user defined capInsets.
     *@param  textureSize  The size of a scale9enabled texture
     *@return a restricted capInset.
     */
    static Rect restrictCapInsetRect(const Rect& capInsets, const Size& textureSize);
};
}

NS_CC_END

#endif /* defined(__CocoGUI__UISystem__) */