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# QAxWidget Class Reference
[QAxContainer module]

The QAxWidget class is a QWidget that wraps an ActiveX control. More...

Inherits QWidget and QAxBase.

### Methods

- __init__ (self, QWidget parent = None, Qt.WindowFlags flags = 0)
- __init__ (self, QString, QWidget parent = None, Qt.WindowFlags flags = 0)
- changeEvent (self, QEvent)
- clear (self)
- connectNotify (self, str)
- bool createHostWindow (self, bool)
- bool doVerb (self, QString)
- QSize minimumSizeHint (self)
- resizeEvent (self, QResizeEvent)
- QSize sizeHint (self)
- bool translateKeyEvent (self, int, int)

## Detailed Description

The QAxWidget class is a QWidget that wraps an ActiveX control.

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 supported data types, become available as Qt properties, slots and signals. The base class QAxBase provides an API to access the ActiveX directly through the `IUnknown` pointer.

QAxWidget is a QWidget and can mostly be used as such, e.g. it can be organized in a widget hierarchy and layouts or act as an event filter. Standard widget properties, e.g. 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, notably dynamicCall() and querySubObject().

Warning: You can subclass QAxWidget, but you cannot use the `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 subclass.

## Method Documentation

### QAxWidget.__init__ (self, QWidget parent = None, Qt.WindowFlags flags = 0)

The parent argument, if not None, causes self to be owned by Qt instead of PyQt.

Creates an empty QAxWidget widget and propagates parent and f to the QWidget constructor. To initialize a control, call setControl().

### QAxWidget.__init__ (self, QString, QWidget parent = None, Qt.WindowFlags flags = 0)

The parent argument, if not None, causes self to be owned by Qt instead of PyQt.

Creates an QAxWidget widget and initializes the ActiveX control c. parent and f are propagated to the QWidget contructor.

See also setControl().

### QAxWidget.changeEvent (self, QEvent)

Reimplemented from QWidget.changeEvent().

### QAxWidget.clear (self)

Reimplemented from QAxBase.clear().

Shuts down the ActiveX control.

### QAxWidget.connectNotify (self, str)

Reimplemented from QObject.connectNotify().

### bool QAxWidget.createHostWindow (self, bool)

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.

This function is called by 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.

### bool QAxWidget.doVerb (self, QString)

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.

This function was introduced in Qt 4.1.

### QSize QAxWidget.minimumSizeHint (self)

Reimplemented from QWidget.minimumSizeHint().

### QAxWidget.resizeEvent (self, QResizeEvent)

Reimplemented from QWidget.resizeEvent().

### QSize QAxWidget.sizeHint (self)

Reimplemented from QWidget.sizeHint().

### bool QAxWidget.translateKeyEvent (self, int, int)

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.