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=Qt Platform Abstraction=
{{LangSwitch}}
[[Category:Developing_with_Qt::Qt 5]]
QPA is the platform abstraction layer for [[Qt 5]] and replaces QWS and the platform ports from Qt 4. You can learn about it at this video presentation:


'''English''' | [[Qt Platform Abstraction SimplifiedChinese|中文]]
* [https://www.youtube.com/watch?v=qCWWxBf6vko QPA - The Qt Platform Abstraction] by Thomas Senyk.


<span class="caps">QPA</span> is the platform abstraction layer for [[Qt-5|Qt 5]] and replaces <span class="caps">QWS</span> and the platform ports from Qt 4. You can learn about it at this video presentation:
There is currently little documentation for QPA. The best approach for developing a new platform plugin is to [http://code.qt.io/cgit/qt/qtbase.git/tree/src/plugins/platforms look at the other plugins] and see how they implement the APIs in question. The [http://code.qt.io/cgit/qt/qtbase.git/tree/src/plugins/platforms/minimal minimal] plugin is a good starting point. The xcb, windows, cocoa, and qnx plugins are also actively developed and up to date.


* [http://qt.io/videos/watch/qpa-the-qt-platform-abstraction <span class="caps">QPA</span> – The Qt Platform Abstraction] ''[qt.io]'' by Thomas Senyk.
QPA plugins are implemented by subclassing various QPlatform* classes. There are two "root" classes: QPlatformIntegration for window system integration and QPlatformTheme for deeper platform theming and integration. QStyle is not a part of QPA.


There is currently little documentation for <span class="caps">QPA</span>. The best approach for developing a new platform plugin is to [http://qt.gitorious.net/qt/qtbase/trees/master/src/plugins/platforms look at the other plugins] ''[qt.gitorious.net]'' and see how they implement the <span class="caps">API</span>s in question. The [http://qt.gitorious.net/qt/qtbase/trees/master/src/plugins/platforms/minimal minimal] ''[qt.gitorious.net]'' plugin is a good starting point. The xcb, windows, cocoa, and qnx plugins are also actively developed and up to date.
The APIs provided by QPlatformIntegration are at this point ([[Qt 5 Alpha]]) mostly stable. QPlatformTheme still has ongoing development. There
are no source or binary compatibility guarantees for the QPA classes, meaning that a platform plugin is only guaranteed to work with the Qt version it was developed against. API changes will however only be made in minor releases. (5.1, 5.2, and so on.)


<span class="caps">QPA</span> plugins are implemented by subclassing various QPlatform* classes. There are two “root” classes: QPlatformIntegration for window system integration and QPlatformTheme for deeper platform theming and integration. QStyle is not a part of <span class="caps">QPA</span>.
== Class Overview ==


The <span class="caps">API</span>s provided by QPlatformIntegration are at this point ([[Qt-5-Alpha|Qt 5 Alpha]]) mostly stable. QPlatformTheme still has ongoing development. There<br /> are no source or binary compatibility guarantees for the <span class="caps">QPA</span> classes, meaning that a platform plugin is only guaranteed to work with the Qt version it was developed against. <span class="caps">API</span> changes will however only be made in minor releases. (5.1, 5.2, and so on.)
<code>QPlatformIntegration
QPlatformWindow
QPlatformBackingStore
QPlatformOpenGLContext
QPlatformSharedGraphicsCache
QPlatformFontDatabase
QPlatformClipboard
QPlatformDrag
QAbstractEventDispatcher
QPlatformInputContext
QPlatformAccessibility
QPlatformNativeInterface
QPlatformServices


==Class Overview==
QPlatformTheme
QPlatformMenu
QPlatformMenuBar
QPlatformDialogHelper
platform palettes
platform fonts
theme hints</code>


[http://qt.gitorious.net/qt/qtbase/trees/master/src/platformsupport src/platformsupport] ''[qt.gitorious.net]'' contains several helper classes for implementing platform plugins on unix-like systems.
[http://code.qt.io/cgit/qt/qtbase.git/tree/src/platformsupport src/platformsupport] contains several helper classes for implementing platform plugins on unix-like systems.
 
A basic introduction to various <span class="caps">QPA</span> classes can be on this blog [http://qforever.wordpress.com/2012/04/10/qt-platform-abstraction-starter-guide/ post] ''[qforever.wordpress.com]'' .
 
===Categories:===
 
* [[:Category:Developing with Qt|Developing_with_Qt]]
** [[:Category:Developing with Qt::Qt-5|Qt 5]]

Latest revision as of 15:20, 21 December 2016

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QPA is the platform abstraction layer for Qt 5 and replaces QWS and the platform ports from Qt 4. You can learn about it at this video presentation:

There is currently little documentation for QPA. The best approach for developing a new platform plugin is to look at the other plugins and see how they implement the APIs in question. The minimal plugin is a good starting point. The xcb, windows, cocoa, and qnx plugins are also actively developed and up to date.

QPA plugins are implemented by subclassing various QPlatform* classes. There are two "root" classes: QPlatformIntegration for window system integration and QPlatformTheme for deeper platform theming and integration. QStyle is not a part of QPA.

The APIs provided by QPlatformIntegration are at this point (Qt 5 Alpha) mostly stable. QPlatformTheme still has ongoing development. There are no source or binary compatibility guarantees for the QPA classes, meaning that a platform plugin is only guaranteed to work with the Qt version it was developed against. API changes will however only be made in minor releases. (5.1, 5.2, and so on.)

Class Overview

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 contains several helper classes for implementing platform plugins on unix-like systems.

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