简单范例 (ActiveQt)

简单范例演示使用 QAxBindable and QAxFactory .

简单范例演示使用 QAxBindable::requestPropertyChange () 和 QAxBindable::propertyChanged ()，和使用 QAxFactory 透过 QAXFACTORY_BEGIN() , QAXCLASS() and QAXFACTORY_END() 宏。

此范例中的 ActiveX 控件布置为 QWidget 采用 QSlider ， QLCDNumber 和 QLineEdit 。它提供信号/槽/特性接口以更改滑块和行编辑的值，并获得任何特性改变的通知。

此范例是 ActiveX 的 Qt 实现

class QSimpleAX : public QWidget, public QAxBindable
{
    Q_OBJECT
    Q_CLASSINFO("ClassID",     "{DF16845C-92CD-4AAB-A982-EB9840E74669}")
    Q_CLASSINFO("InterfaceID", "{616F620B-91C5-4410-A74E-6B81C76FFFE0}")
    Q_CLASSINFO("EventsID",    "{E1816BBA-BF5D-4A31-9855-D6BA432055FF}")
    Q_PROPERTY(QString text READ text WRITE setText)
    Q_PROPERTY(int value READ value WRITE setValue)
public:
    explicit QSimpleAX(QWidget *parent = nullptr)
    : QWidget(parent)
    {
        QVBoxLayout *vbox = new QVBoxLayout(this);
        m_slider = new QSlider(Qt::Horizontal, this);
        m_LCD = new QLCDNumber(3, this);
        m_edit = new QLineEdit(this);
        connect(m_slider, &QAbstractSlider::valueChanged, this, &QSimpleAX::setValue);
        connect(m_edit, &QLineEdit::textChanged, this, &QSimpleAX::setText);
        vbox->addWidget(m_slider);
        vbox->addWidget(m_LCD);
        vbox->addWidget(m_edit);
    }
    QString text() const
    {
        return m_edit->text();
    }
    int value() const
    {
        return m_slider->value();
    }
signals:
    void someSignal();
    void valueChanged(int);
    void textChanged(const QString&);
public slots:
    void setText(const QString &string)
    {
        if (!requestPropertyChange("text"))
            return;
        QSignalBlocker blocker(m_edit);
        m_edit->setText(string);
        emit someSignal();
        emit textChanged(string);
        propertyChanged("text");
    }
    void about()
    {
        QMessageBox::information( this, "About QSimpleAX", "This is a Qt widget, and this slot has been\n"
                                                          "called through ActiveX/OLE automation!" );
    }
    void setValue(int i)
    {
        if (!requestPropertyChange("value"))
            return;
        QSignalBlocker blocker(m_slider);
        m_slider->setValue(i);
        m_LCD->display(i);
        emit valueChanged(i);
        propertyChanged("value");
    }
private:
    QSlider *m_slider;
    QLCDNumber *m_LCD;
    QLineEdit *m_edit;
};
					

控件的导出是使用默认 QAxFactory

QAXFACTORY_BEGIN(
    "{EC08F8FC-2754-47AB-8EFE-56A54057F34E}", // type library ID
    "{A095BA0C-224F-4933-A458-2DD7F6B85D8F}") // application ID
    QAXCLASS(QSimpleAX)
QAXFACTORY_END()
					

要构建范例必须先构建 QAxServer 库。然后运行 qmake 和 make 工具在 examples/activeqt/simple .

The demonstration 要求 WebBrowser 支持 ActiveX 控件，并启用脚本。

简单 ActiveX 控件的嵌入是使用 <object> 标签。

<object ID="QSimpleAX" CLASSID="CLSID:DF16845C-92CD-4AAB-A982-EB9840E74669"
CODEBASE="http://qt.nokia.com/demos/simpleax.cab">
    <PARAM NAME="text" VALUE="A simple control" />
    <PARAM NAME="value" VALUE="1" />
[Object not available! Did you forget to build and register the server?]
</object>
					

A simple HTML button is connected to the ActiveQt's about() slot.

<FORM>
    <INPUT TYPE="BUTTON" VALUE="About..." onClick="QSimpleAX.about()" />
</FORM>
					

第 2 ActiveX 控件 - 标准日历控件 - 是实例化

<object ID="Calendar" CLASSID="CLSID:8E27C92B-1264-101C-8A2F-040224009C02">
[Standard Calendar control not available!]
    <PARAM NAME="day" VALUE="1" />
</object>
					

来自 ActiveX 控件的事件的处理是使用 Visual Basic 脚本和 JavaScript 两者。

<SCRIPT LANGUAGE="VBScript">
Sub Calendar_Click()
    MsgBox( "Calendar Clicked!" )
End Sub
Sub QSimpleAX_TextChanged( str )
    document.title = str
End Sub
</SCRIPT>
<SCRIPT LANGUAGE="JavaScript">
function QSimpleAX::ValueChanged( Newvalue )
{
    Calendar.Day = Newvalue;
}
</SCRIPT>
					

范例工程 @ code.qt.io