mirror of https://github.com/axmolengine/axmol.git
133 lines
4.4 KiB
C++
133 lines
4.4 KiB
C++
/****************************************************************************
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Copyright (c) 2013-2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#ifndef __UIHELPER_H__
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#define __UIHELPER_H__
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#include <string>
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#include "platform/CCPlatformMacros.h"
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#include "ui/GUIExport.h"
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#include "2d/CCNode.h"
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NS_CC_BEGIN
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/**
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* @addtogroup ui
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* @{
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*/
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namespace ui
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{
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class Widget;
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/**
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* Helper class for traversing children in widget tree.
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* It also provides some helper functions for layout.
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*/
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class CC_GUI_DLL Helper
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{
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public:
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/**
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* Find a widget with a specific tag from root widget.
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* This search will be recursive through all child widgets.
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* @param root The be searched root widget.
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* @param tag The widget tag.
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* @return Widget instance pointer.
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*/
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static Widget* seekWidgetByTag(Widget* root, int tag);
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/**
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* Find a widget with a specific name from root widget.
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* This search will be recursive through all child widgets.
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*
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* @param root The be searched root widget.
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* @param name The widget name.
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* @return Widget instance pointer.
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*/
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static Widget* seekWidgetByName(Widget* root, const std::string& name);
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/**
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* Find a widget with a specific action tag from root widget
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* This search will be recursive through all child widgets.
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*@param root The be searched root widget.
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*@param tag The widget action's tag.
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*@return Widget instance pointer.
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*/
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static Widget* seekActionWidgetByActionTag(Widget* root, int tag);
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/**
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* @brief Get a UTF8 substring from a std::string with a given start position and length
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* Sample: std::string str = "中国中国中国"; substr = getSubStringOfUTF8String(str,0,2) will = "中国"
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*
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* @param str The source string.
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* @param start The start position of the substring.
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* @param length The length of the substring in UTF8 count
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* @return a UTF8 substring
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* @js NA
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*/
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static std::string getSubStringOfUTF8String(const std::string& str,
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std::string::size_type start,
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std::string::size_type length);
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/**
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* Refresh object and it's children layout state
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*
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*@param rootNode A Node* or Node* descendant instance pointer.
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*
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*/
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static void doLayout(Node* rootNode);
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/**
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* Change the active property of Layout's @see `LayoutComponent`
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*@param active A boolean value.
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*/
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static void changeLayoutSystemActiveState(bool active);
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/**
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*@brief restrict capInsetSize, when the capInsets's width is larger than the textureSize, it will restrict to 0,
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* the height goes the same way as width.
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*@param capInsets A user defined capInsets.
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*@param textureSize The size of a scale9enabled texture
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*@return a restricted capInset.
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*/
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static Rect restrictCapInsetRect(const Rect& capInsets, const Vec2& textureSize);
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/**
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*@brief Convert a node's boundingBox rect into screen coordinates.
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*
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* @param node Any node pointer.
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*
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* @return A Rect in screen coordinates.
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*/
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static Rect convertBoundingBoxToScreen(Node* node);
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};
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} // namespace ui
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// end of ui group
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/// @}
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NS_CC_END
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#endif /* defined(__CocoGUI__UISystem__) */
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