The QScriptExtensionPlugin class provides an abstract base for custom QScript extension plugins. 更多...
| 头： | #include <QScriptExtensionPlugin> |
| qmake: | QT += script |
| Since: | Qt 4.3 |
| 继承： | QObject and QScriptExtensionInterface |
该类在 Qt 4.3 引入。
| QScriptExtensionPlugin (QObject * parent = nullptr) | |
| virtual | ~QScriptExtensionPlugin () |
| QScriptValue | setupPackage (const QString & key , QScriptEngine * engine ) const |
| virtual void | initialize (const QString & key , QScriptEngine * engine ) override = 0 |
| virtual QStringList | keys () const override = 0 |
QScriptExtensionPlugin is a plugin interface that makes it possible to offer extensions that can be loaded dynamically into applications using the QScriptEngine 类。
Writing a script extension plugin is achieved by subclassing this base class, reimplementing the pure virtual keys () 和 initialize () functions, and exporting the class using the Q_PLUGIN_METADATA () macro. See 如何创建 Qt 插件 了解细节。
另请参阅 QScriptEngine::importExtension () 和 Creating Qt Script Extensions .
Constructs a script extension plugin with the given parent .
Note that this constructor is invoked automatically by the Q_PLUGIN_METADATA () macro, so there is no need for calling it explicitly.
[虚拟]
QScriptExtensionPlugin::
~QScriptExtensionPlugin
()
Destroys the script extension plugin.
Note that Qt destroys a plugin automatically when it is no longer used, so there is no need for calling the destructor explicitly.
[override pure virtual]
void
QScriptExtensionPlugin::
initialize
(const
QString
&
key
,
QScriptEngine
*
engine
)
Initializes the extension specified by key 以给定 engine . The key must come from the set of keys ().
另请参阅 keys ().
[override pure virtual]
QStringList
QScriptExtensionPlugin::
keys
() const
Returns the list of keys this plugin supports.
These keys are usually the names of the "modules" or "packages" that are implemented in the plugin (e.g.
com.mycompany.MyProduct
).
另请参阅 initialize ().
This function is provided for convenience when reimplementing
initialize
(). It splits the given
key
on
'.'
(dot), and ensures that there's a corresponding path of objects in the environment of the given
engine
, creating new objects to complete the path if necessary. E.g. if the key is "com.trolltech", after the call to setupPackage() the script expression
com.trolltech
will evaluate to an object. More specifically, the engine's Global Object will have a property called "com", which in turn has a property called "trolltech".
Use this function to avoid global namespace pollution when installing your extensions in the engine.
另请参阅 initialize ().