give a few references in QgisInterface API docs

Author: 3nids

python/gui/auto_generated/qgisinterface.sip.in

@@ -969,6 +969,8 @@ Register a new tab in the vector layer properties dialog.
    Ownership of the factory is not transferred, and the factory must
    be unregistered when plugin is unloaded.
 
+.. seealso:: :py:class:`QgsMapLayerConfigWidgetFactory`
+
 .. seealso:: :py:func:`unregisterMapLayerConfigWidgetFactory`
 
 .. versionadded:: 2.16
@@ -978,6 +980,8 @@ Register a new tab in the vector layer properties dialog.
 %Docstring
 Unregister a previously registered tab in the vector layer properties dialog.
 
+.. seealso:: :py:class:`QgsMapLayerConfigWidgetFactory`
+
 .. seealso:: :py:func:`registerMapLayerConfigWidgetFactory`
 
 .. versionadded:: 2.16
@@ -992,6 +996,8 @@ Register a new tab in the options dialog.
    Ownership of the factory is not transferred, and the factory must
    be unregistered when plugin is unloaded.
 
+.. seealso:: :py:class:`QgsOptionsWidgetFactory`
+
 .. seealso:: :py:func:`unregisterOptionsWidgetFactory`
 
 .. versionadded:: 3.0
@@ -1001,6 +1007,8 @@ Register a new tab in the options dialog.
 %Docstring
 Unregister a previously registered tab in the options dialog.
 
+.. seealso:: :py:class:`QgsOptionsWidgetFactory`
+
 .. seealso:: :py:func:`registerOptionsWidgetFactory`
 
 .. versionadded:: 3.0
@@ -1015,6 +1023,8 @@ Register a new custom drop handler.
    Ownership of the factory is not transferred, and the factory must
    be unregistered when plugin is unloaded.
 
+.. seealso:: :py:class:`QgsCustomDropHandler`
+
 .. seealso:: :py:func:`unregisterCustomDropHandler`
 
 .. versionadded:: 3.0
@@ -1024,6 +1034,8 @@ Register a new custom drop handler.
 %Docstring
 Unregister a previously registered custom drop handler.
 
+.. seealso:: :py:class:`QgsCustomDropHandler`
+
 .. seealso:: :py:func:`registerCustomDropHandler`
 
 .. versionadded:: 3.0
@@ -1038,6 +1050,8 @@ Register a new custom drop ``handler`` for layout windows.
    Ownership of the factory is not transferred, and the factory must
    be unregistered when plugin is unloaded.
 
+.. seealso:: :py:class:`QgsLayoutCustomDropHandler`
+
 .. seealso:: :py:func:`unregisterCustomLayoutDropHandler`
 
 .. versionadded:: 3.0
@@ -1047,6 +1061,8 @@ Register a new custom drop ``handler`` for layout windows.
 %Docstring
 Unregister a previously registered custom drop ``handler`` for layout windows.
 
+.. seealso:: :py:class:`QgsLayoutCustomDropHandler`
+
 .. seealso:: :py:func:`registerCustomLayoutDropHandler`
 
 .. versionadded:: 3.0

src/gui/qgisinterface.h

@@ -816,13 +816,15 @@ class GUI_EXPORT QgisInterface : public QObject
      * Register a new tab in the vector layer properties dialog.
      * \note Ownership of the factory is not transferred, and the factory must
      *       be unregistered when plugin is unloaded.
+     * \see QgsMapLayerConfigWidgetFactory
      * \see unregisterMapLayerConfigWidgetFactory()
      * \since QGIS 2.16
      */
     virtual void registerMapLayerConfigWidgetFactory( QgsMapLayerConfigWidgetFactory *factory ) = 0;
 
     /**
      * Unregister a previously registered tab in the vector layer properties dialog.
+     * \see QgsMapLayerConfigWidgetFactory
      * \see registerMapLayerConfigWidgetFactory()
      * \since QGIS 2.16
     */
@@ -832,13 +834,15 @@ class GUI_EXPORT QgisInterface : public QObject
      * Register a new tab in the options dialog.
      * \note Ownership of the factory is not transferred, and the factory must
      *       be unregistered when plugin is unloaded.
+     * \see QgsOptionsWidgetFactory
      * \see unregisterOptionsWidgetFactory()
      * \since QGIS 3.0
      */
     virtual void registerOptionsWidgetFactory( QgsOptionsWidgetFactory *factory ) = 0;
 
     /**
      * Unregister a previously registered tab in the options dialog.
+     * \see QgsOptionsWidgetFactory
      * \see registerOptionsWidgetFactory()
      * \since QGIS 3.0
     */
@@ -848,13 +852,15 @@ class GUI_EXPORT QgisInterface : public QObject
      * Register a new custom drop handler.
      * \note Ownership of the factory is not transferred, and the factory must
      *       be unregistered when plugin is unloaded.
+     * \see QgsCustomDropHandler
      * \see unregisterCustomDropHandler()
      * \since QGIS 3.0
      */
     virtual void registerCustomDropHandler( QgsCustomDropHandler *handler ) = 0;
 
     /**
      * Unregister a previously registered custom drop handler.
+     * \see QgsCustomDropHandler
      * \see registerCustomDropHandler()
      * \since QGIS 3.0
      */
@@ -864,13 +870,15 @@ class GUI_EXPORT QgisInterface : public QObject
      * Register a new custom drop \a handler for layout windows.
      * \note Ownership of the factory is not transferred, and the factory must
      *       be unregistered when plugin is unloaded.
+     * \see QgsLayoutCustomDropHandler
      * \see unregisterCustomLayoutDropHandler()
      * \since QGIS 3.0
      */
     virtual void registerCustomLayoutDropHandler( QgsLayoutCustomDropHandler *handler ) = 0;
 
     /**
      * Unregister a previously registered custom drop \a handler for layout windows.
+     * \see QgsLayoutCustomDropHandler
      * \see registerCustomLayoutDropHandler()
      * \since QGIS 3.0
      */