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Apache-2.0

GuiLite 揭示UI原理,打造你自己的UI(框架)- 开发者qq群:527251257

超轻量UI框架 - GuiLite是由6千行左右的C/C++代码编写而成,它像MFC,QT一样为开发者提供界面支持。

GuiLite可以嵌入到其他平台中,与Android、Linux、Windows、Mac、MFC、QT、 VR单片机 一起玩耍,相互支持。开发者可以用GuiLite开发界面的跨平台部分,同时也充分使用MFC,QT,Android,Linux,Windows,Mac的界面特性,让自己的界面集百家之长,又不失个性。具体实现方法请见GuiliteSamples库。

相比其他强大的UI框架,GuiLite只聚焦界面开发(特别是手机风格的滑动界面),只使用最基础的C++特性,直达绘制底层。希望通过减少代码,调用层次,让UI框架的体积最小,效率更高,使之流畅运行在:手机,电脑,单片机等硬件环境上。

注意:

为什么开发GuiLite?如何使用?

任何UI框架都不是为你我而生的,只有掌握核心原理,对其深度定制,才能真正掌握自己的命运!因此,我们开发了GuiLite,希望用这6千行代码揭示UI的核心原理和定制方法。

我们不推荐开发者全盘使用GuiLite;鼓励开发者在吃透代码后,根据自身业务特点,修改出更加丰富、个性的界面;或者发展出适合自己的UI框架。

为了聚焦UI核心原理,GuiLite会一直保持单片机的代码体量。

代码简介

gui: 1)实现了各种常规控件(例如:按钮,标签,键盘)及容器(例如:视窗,对话框,滑动页面),开发者可以根据自己的需要,直接在相应的代码上进行修改或重绘,开发出有自己风格,特色的界面;2)实现了用户输入(例如:手指按下/释放)的消息传递,将用户的输入信息传递到整个UI体系树中,并调用相应的响应回调函数;开发者可以根据自己的需要添加/修改响应回调函数。

core: 实现了各个平台(例如:Windows, Linux)的封装,这些封装包括了基本的操作系统接口,底层绘制,图层管理和消息传递。由于开发者面对的应用场景有所不同,所需的操作系统接口也有区别,core中只提供了最基础的接口形式,开发者可以根据自己的需要,直接在api.h/api.cpp中添加新的操作系统接口或单片机接口

最后,代码的更新/发布,不会作具体通知,请开发者随时更新代码库。

GuiLite的基本原理

GuiLite只作两个工作:界面元素管理和图形绘制。

界面元素管理

界面元素管理包括:对所有控件(button,spinbox, lable, keyboard),容器(dialog, view)管理;具体的管理方法是为所有的界面元素建造一棵树,利用这棵树实现对所有界面元素的遍历,查询,状态更改。

比如:当你按下一个dialog的button时,手指的位置信息(x,y)会被传入树的根部(root),然后从root开始寻找,哪个dialog被点中,dialog的哪个button被点中,并调用buton被点中的回调函数,用于作相应处理(一般会进行button的状态修改及重绘工作)

界面元素如何创建

所有界面元素都继承自c_wnd类的对象,对象被实例化时,也就完成了界面元素的创建;但此时的界面元素是孤独的,与其他界面元素没有形成联系(没有父母,没有兄弟姐妹)

界面元素如何被管理(纳入tree中)

新创建的界面元素纳入管理的过程,就是为其添加父母,兄弟姐妹的过程。使用的函数接口为connect();从此该界面元素会跟其他界面元素一样,纳入一棵树中,并随之响应用户可能的点击操作。

当需要删掉该界面元素时,使用disconnect();从此该界面元素会断绝所有的父子关系,从树上摘下来,不再响应用户的触控操作;但对象本身不会被销毁。典型应用场景:软键盘的创建/退出。

图形绘制

图形绘制包括: 绘制方法和图层管理。其中点绘制是线/面/位图绘制的基础,若干个点的绘制,形成点面及位图;图层管理,则是管理多个界面元素的遮挡关系,系统默认支持3层遮挡关系,这3个层次可以为:视图背景层,对话框层,keyboard/spinbox控件层。

绘制方法

请参看文件bitmap.cpp和surface.cpp中的draw_xxx()函数。

图层管理

GuiLite的所有图层,如下图所示: Graphic layer

display层: 该层对应了物理显存,display层决定了一个显示终端的最终显示效果;通常系统中至少有一个display层。

surface层: 该层属于display层的一个部分;它为左右滑动而存在,每一张滑动页面均对应了一个surface层;surface层决定了一个滑动页面的最终显示效果;通常1个display层会对应多个display层。

frame层: 该层属于surface层的一个部分;它现实叠加界面元素而存在,

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6千行的跨平台UI框架,酷炫的超乎想象。 展开 收起
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