Wrapper Example (ActiveQt)

The Wrapper example demonstrates how to export existing QWidget classes as ActiveX controls, and the use of QAxFactory together with the QAXFACTORY_EXPORT() macro. ActiveX controls in this example are the standard button classes QPushButton, QCheckBox and QRadioButton as provided by Qt.


  class ActiveQtFactory : public QAxFactory
  {
  public:
      ActiveQtFactory(const QUuid &lib, const QUuid &app)
          : QAxFactory(lib, app)
      {}

      QStringList featureList() const
      {
          return m_activeElements.keys();
      }

      QObject *createObject(const QString &key)
      {
          auto it = m_activeElements.find(key);
          if (it != m_activeElements.end())
              return it->create();
          return nullptr;
      }

      const QMetaObject *metaObject(const QString &key) const
      {
          auto it = m_activeElements.find(key);
          if (it != m_activeElements.end())
              return it->metaObject;
          return nullptr;
      }

      QUuid classID(const QString &key) const
      {
          auto it = m_activeElements.find(key);
          if (it != m_activeElements.end())
              return it->classID;
          return QUuid();
      }

      QUuid interfaceID(const QString &key) const
      {
          auto it = m_activeElements.find(key);
          if (it != m_activeElements.end())
              return it->interfaceID;
          return QUuid();
      }

      QUuid eventsID(const QString &key) const
      {
          auto it = m_activeElements.find(key);
          if (it != m_activeElements.end())
              return it->eventsID;
          return QUuid();
      }

  private:

      struct ActiveElement {
         QUuid classID;
         QUuid interfaceID;
         QUuid eventsID;
         const QMetaObject *metaObject;
         std::function<QObject *()> create;
      };

      const QHash<QString, ActiveElement> m_activeElements {
          {
              QStringLiteral("QCheckBox"), {
                  QUuid("{6E795DE9-872D-43CF-A831-496EF9D86C68}"),
                  QUuid("{4FD39DD7-2DE0-43C1-A8C2-27C51A052810}"),
                  QUuid("{FDB6FFBE-56A3-4E90-8F4D-198488418B3A}"),
                  &QCheckBox::staticMetaObject,
                  []() { return new QCheckBox; }
              }
          },
          {
              QStringLiteral("QRadioButton"), {
                  QUuid("{AFCF78C8-446C-409A-93B3-BA2959039189}"),
                  QUuid("{7CC8AE30-206C-48A3-A009-B0A088026C2F}"),
                  QUuid("{73EE4860-684C-4A66-BF63-9B9EFFA0CBE5}"),
                  &QRadioButton::staticMetaObject,
                  []() { return new QRadioButton; }
              }
          },
          {
              QStringLiteral("QPushButton"), {
                  QUuid("{2B262458-A4B6-468B-B7D4-CF5FEE0A7092}"),
                  QUuid("{06831CC9-59B6-436A-9578-6D53E5AD03D3}"),
                  QUuid("{3CC3F17F-EA59-4B58-BBD3-842D467131DD}"),
                  &QPushButton::staticMetaObject,
                  []() { return new QPushButton; }
              }
          },
          {
              QStringLiteral("QToolButton"), {
                  QUuid("{7c0ffe7a-60c3-4666-bde2-5cf2b54390a1}"),
                  QUuid("{6726080f-d63d-4950-a366-9bf33e5cdf84}"),
                  QUuid("{f4d421fd-4ead-4fd9-8a25-440766939639}"),
                  &QToolButton::staticMetaObject,
                  []() { return new QToolButton; }
              }
          },
      };

  };

The factory implementation returns the list of supported controls, creates controls on request and provides information about the unique IDs of the COM classes and interfaces for each control.


  QAXFACTORY_EXPORT(ActiveQtFactory, "{3B756301-0075-4E40-8BE8-5A81DE2426B7}", "{AB068077-4924-406a-BBAF-42D91C8727DD}")

The factory is exported using the QAXFACTORY_EXPORT macro.

To build the example you must first build the QAxServer library. Then run qmake and your make tool in examples/activeqt/wrapper.

The demonstration requires a web browser that supports ActiveX controls, and scripting to be enabled.


  <SCRIPT LANGUAGE="VBScript">
  Sub ToolButton_Clicked()
      RadioButton.text = InputBox( "Enter something", "Wrapper Demo" )
  End Sub

  Sub PushButton_clicked()
      MsgBox( "Thank you!" )
  End Sub

  Sub CheckBox_toggled( state )
      if state = 0 then
          CheckBox.text = "Check me!"
      else
          CheckBox.text = "Uncheck me!"
      end if
  End Sub
  </SCRIPT>
  <p />
  A QPushButton:<br />
  <object ID="PushButton" CLASSID="CLSID:2B262458-A4B6-468B-B7D4-CF5FEE0A7092"
  CODEBASE="http://qt.nokia.com/demos/wrapperax.cab">
      <PARAM NAME="text" VALUE="Click me!" />
  [Object not available! Did you forget to build and register the server?]
  </object><br />

  <p />
  A QCheckBox:<br />
  <object ID="CheckBox" CLASSID="CLSID:6E795de9-872d-43cf-a831-496ef9d86c68"
  CODEBASE="http://qt.nokia.com/demos/wrapperax.cab">
      <PARAM NAME="text" VALUE="Check me!" />
  [Object not available! Did you forget to build and register the server?]
  </object><br />

  <p />
  A QToolButton:<br />
  <object ID="ToolButton" CLASSID="CLSID:7c0ffe7a-60c3-4666-bde2-5cf2b54390a1"
  CODEBASE="http://qt.nokia.com/demos/wrapperax.cab">
  [Object not available! Did you forget to build and register the server?]
  </object><br />

  <p />
  A QRadioButton:<br />
  <object ID="RadioButton" CLASSID="CLSID:afcf78c8-446c-409a-93b3-ba2959039189"
  CODEBASE="http://qt.nokia.com/demos/wrapperax.cab">
      <PARAM NAME="text" VALUE="Tune me!" />
  [Object not available! Did you forget to build and register the server?]
  </object><br />

Files: