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[[Category:Developing_with_Qt::Qt 5]] | [[Category:Developing_with_Qt::Qt 5]] | ||
= Qt 平台抽象 = | |||
* 简体中文| [[Qt Platform Abstraction|English]] | * 简体中文| [[Qt Platform Abstraction|English]] | ||
Latest revision as of 16:03, 16 March 2015
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Qt 平台抽象
- 简体中文| English
QPA (Qt Platform Abstraction) 即Qt平台抽象层， 移植自Qt4， 在Qt5中替代QWS(Qt Window System)。 你可以从这个视频演示中了解它：
QPA - The Qt Platform Abstraction by Thomas Senyk.
目前只有很少的QPA的文档。开发一个新平台插件最好的方式是 看其他的插件. 理解它们的API是怎样实现的。 minimal 插件是最好的切入点。 xcb，windows，cocoa和qnx插件也在开发和更新中。
QPA插件通过子类化不同的QPlatform*类来实现。QPA中有两个基类：QPlatformIntergration窗口系统集成和QPlatformTheme 深入平台主题和集成。 QStyle 不是QPA的一部分。
QPlatformIntergration 此时(Qt 5 Alpha)提供的API大部分已经稳定。 QPlatformTheme 仍在开发中。QPA类并没有代码和二进制的兼容性保证，意思是一个平台插件只保证在它开发依赖的Qt版本中工作。 但是API的改变只在次发行版中。（5.1， 5.2 等等。）
类概览
QPlatformIntegration
QPlatformWindow
QPlatformBackingStore
QPlatformOpenGLContext
QPlatformSharedGraphicsCache
QPlatformFontDatabase
QPlatformClipboard
QPlatformDrag
QAbstractEventDispatcher
QPlatformInputContext
QPlatformAccessibility
QPlatformNativeInterface
QPlatformServices
QPlatformTheme
QPlatformMenu
QPlatformMenuBar
QPlatformDialogHelper
platform palettes
platform fonts
theme hints
src/platformsupport 包含了几个在类unix(unix-like)系统中实现平台插件有帮助的类。