QAxWidget 类是 QWidget 用于包裹 ActiveX 控件。 更多...
| 头： | #include <QAxWidget> |
| CMake: |
find_package(Qt6 COMPONENTS AxContainer REQUIRED)
target_link_libraries(mytarget PRIVATE Qt6::AxContainer) |
| qmake: | QT += axcontainer |
| 继承： | QAxBaseWidget and QAxBase |
| QAxWidget (IUnknown * iface , QWidget * parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags()) | |
| QAxWidget (const QString & c , QWidget * parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags()) | |
| QAxWidget (QWidget * parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags()) | |
| virtual | ~QAxWidget () override |
| void | clear () |
| virtual QAxAggregated * | createAggregate () |
| bool | doVerb (const QString & verb ) |
| virtual QSize | minimumSizeHint () const override |
| virtual void | resetControl () override |
| virtual QSize | sizeHint () const override |
| virtual bool | createHostWindow (bool initialized ) |
| bool | createHostWindow (bool initialized , const QByteArray & data ) |
| virtual bool | translateKeyEvent (int message , int keycode ) const |
| virtual void | changeEvent (QEvent * e ) override |
| virtual void | connectNotify (const QMetaMethod & signal ) override |
| virtual bool | initialize (IUnknown ** ptr ) override |
| virtual void | resizeEvent (QResizeEvent *) override |
A QAxWidget can be instantiated as an empty object, with the name of the ActiveX control it should wrap, or with an existing interface pointer to the ActiveX control. The ActiveX control's properties, methods and events which only use
QAxBase
支持数据类型，变为可用的 Qt 特性、槽及信号。基类
QAxBase
提供 API 以直接访问 ActiveX 透过
IUnknown
指针。
QAxWidget is a QWidget 且主要可以这样使用，如，可以按 Widget 层次结构和布局组织它，或充当事件过滤器。标准 Widget 特性，如 enabled are supported, but it depends on the ActiveX control to implement support for ambient properties like e.g. palette or font. QAxWidget tries to provide the necessary hints.
However, you cannot reimplement Qt-specific event handlers like mousePressEvent or keyPressEvent and expect them to be called reliably. The embedded control covers the QAxWidget completely, and usually handles the user interface itself. Use control-specific APIs (i.e. listen to the signals of the control), or use standard COM techniques like window procedure subclassing.
QAxWidget also inherits most of its ActiveX-related functionality from QAxBase ，尤其 dynamicCall () 和 querySubObject ().
警告：
可以子类 QAxWidget，但不可以使用
Q_OBJECT
macro in the subclass (the generated moc-file will not compile), so you cannot add further signals, slots or properties. This limitation is due to the metaobject information generated in runtime. To work around this problem, aggregate the QAxWidget as a member of the
QObject
子类。
另请参阅 QAxBase , QAxObject , QAxScript ，和 ActiveQt 框架 .
Creates a QAxWidget that wraps the COM object referenced by iface . parent and f 被传播给 QWidget 构造函数。
创建 QAxWidget 小部件并初始化 ActiveX 控件 c . parent and f 被传播给 QWidget 构造函数。
另请参阅 setControl ().
Creates an empty QAxWidget widget and propagates parent and f 到 QWidget 构造函数。要初始化控件，调用 setControl ().
[override virtual]
QAxWidget::
~QAxWidget
()
关闭 ActiveX 控件并销毁 QAxWidget 小部件，清理所有分配资源。
另请参阅 clear ().
[override virtual protected]
void
QAxWidget::
changeEvent
(
QEvent
*
e
)
重实现： QWidget::changeEvent (QEvent *event).
关闭 ActiveX 控件。
另请参阅 resetControl ().
[override virtual protected]
void
QAxWidget::
connectNotify
(const
QMetaMethod
&
signal
)
重实现： QObject::connectNotify (const QMetaMethod &signal).
[virtual]
QAxAggregated
*QAxWidget::
createAggregate
()
Reimplement this function when you want to implement additional COM interfaces for the client site of the ActiveX control, or when you want to provide alternative implementations of COM interfaces. Return a new object of a QAxAggregated 子类。
默认实现返回 null 指针。
[virtual protected]
bool
QAxWidget::
createHostWindow
(
bool
initialized
)
Creates the client site for the ActiveX control, and returns true if the control could be embedded successfully, otherwise returns false. If initialized is true the control has already been initialized.
此函数被调用通过 initialize (). If you reimplement initialize to customize the actual control instantiation, call this function in your reimplementation to have the control embedded by the default client side. Creates the client site for the ActiveX control, and returns true if the control could be embedded successfully, otherwise returns false.
[protected]
bool
QAxWidget::
createHostWindow
(
bool
initialized
, const
QByteArray
&
data
)
Creates the client site for the ActiveX control, and returns true if the control could be embedded successfully, otherwise returns false. If initialized is false the control will be initialized using the data . The control will be initialized through either IPersistStreamInit or IPersistStorage interface.
If the control needs to be initialized using custom data, call this function in your reimplementation of initialize (). This function is not called by the default implementation of initialize ().
Requests the ActiveX control to perform the action verb . The possible verbs are returned by verbs ().
The function returns true if the object could perform the action, otherwise returns false.
[override virtual protected]
bool
QAxWidget::
initialize
(
IUnknown
**
ptr
)
重实现： QAxBase::initialize (IUnknown **ptr).
调用 QAxBase::initialize ( ptr ), and embeds the control in this widget by calling createHostWindow (false) if successful.
To initialize the control before it is activated, reimplement this function and add your initialization code before you call createHostWindow (true)。
返回
true
当成功时，
false
否则。
[override virtual]
QSize
QAxWidget::
minimumSizeHint
() const
重实现访问函数为特性： QWidget::minimumSizeHint .
[override virtual]
void
QAxWidget::
resetControl
()
重实现： QAxObjectInterface::resetControl ().
关闭 ActiveX 控件。
[override virtual protected]
void
QAxWidget::
resizeEvent
(
QResizeEvent
*)
重实现： QWidget::resizeEvent (QResizeEvent *event).
[override virtual]
QSize
QAxWidget::
sizeHint
() const
重实现访问函数为特性： QWidget::sizeHint .
[virtual protected]
bool
QAxWidget::
translateKeyEvent
(
int
message
,
int
keycode
) const
Reimplement this function to pass certain key events to the ActiveX control. message is the Window message identifier specifying the message type (ie. WM_KEYDOWN), and keycode is the virtual keycode (ie. VK_TAB).
If the function returns true the key event is passed on to the ActiveX control, which then either processes the event or passes the event on to Qt.
If the function returns false the processing of the key event is ignored by ActiveQt, ie. the ActiveX control might handle it or not.
The default implementation returns true for the following cases:
| WM_SYSKEYDOWN | WM_SYSKEYUP | WM_KEYDOWN |
|---|---|---|
| All keycodes | VK_MENU | VK_TAB, VK_DELETE and all non-arrow-keys in combination with VK_SHIFT, VK_CONTROL or VK_MENU |
This table is the result of experimenting with popular ActiveX controls, ie. Internet Explorer and Microsoft Office applications, but for some controls it might require modification.