# Source: kxmlguiclient.h |
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    /* This file is part of the KDE libraries
       Copyright (C) 2000 Simon Hausmann <hausmann@kde.org>
       Copyright (C) 2000 Kurt Granroth <granroth@kde.org>

       This library is free software; you can redistribute it and/or
       modify it under the terms of the GNU Library General Public
       License version 2 as published by the Free Software Foundation.

       This library is distributed in the hope that it will be useful,
       but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       Library General Public License for more details.

       You should have received a copy of the GNU Library General Public License
       along with this library; see the file COPYING.LIB.  If not, write to
       the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
       Boston, MA 02111-1307, USA.
    */
    #ifndef _KXMLGUICLIENT_H
    #define _KXMLGUICLIENT_H

    #include <qdom.h>
    #include <qlist.h>
    #include <qmap.h>

    class KAction;
    class KActionCollection;
    class KInstance;
    class KXMLGUIClientPrivate;
    class KXMLGUIFactory;
    class KXMLGUIBuilder;

    class KXMLGUIClient
    {
    public:
      /**
       * Constructs a KXMLGUIClient which can be used with a
       * @ref KXMLGUIFactory to create a GUI from actions and an XML document, and
       * which can be dynamically merged with other KXMLGUIClients.
       */
      KXMLGUIClient();

      /**
       * Constructs a KXMLGUIClient which can be used with a @ref KXMLGUIFactory
       * to create a GUI from actions and an XML document,
       * and which can be dynamically merged with other KXMLGUIClients.
       *
       * This constructor takes an additional @p parent argument, which makes
       * the client a child client of the parent.
       *
       * Child clients are automatically added to the GUI if the parent is added.
       *
       */
      KXMLGUIClient( KXMLGUIClient *parent );

      /**
       * Destructor
       */
      virtual ~KXMLGUIClient();

      /**
       * Retrieve an action of the client by name.
       * This method is provided for convenience, as it uses @ref #actionCollection()
       * to get the action object.
       */
      KAction* action( const char* name ) const;

      /**
       * Retrieve an action for a given @ref QDomElement. The default
       * implementation uses the "name" attribute to query the action
       * object via the other action() method.
       */
      virtual KAction *action( const QDomElement &element ) const;

      /**
       * Retrieve the entire action collection for the GUI client
       */
      virtual KActionCollection* actionCollection() const;

      /**
       * @return The instance (@ref KInstance) for this part.
       */
      virtual KInstance *instance() const;

      /**
       * @return The parsed XML in a @ref QDomDocument, set by @ref
       * setXMLFile() or @ref setXML().
       * This document describes the layout of the GUI.
       */
      virtual QDomDocument domDocument() const;

      /**
       * This will return the name of the XML file as set by @ref #setXMLFile().
       * If @ref #setXML() is used directly, then this will return NULL.
       *
       * The filename that this returns is obvious for components as each
       * component has exactly one XML file.  In non-components, however,
       * there are usually two: the global file and the local file.  This
       * function doesn't really care about that, though.  It will always
       * return the last XML file set.  This, in almost all cases, will
       * be the local XML file.
       *
       * @return The name of the XML file or QString::null
       */
      virtual QString xmlFile() const;

      virtual QString localXMLFile() const;

      /**
       * @internal
       */
      void setXMLGUIBuildDocument( const QDomDocument &doc );
      /**
       * @internal
       */
      QDomDocument xmlguiBuildDocument() const;

      /**
       * This method is called by the @ref KXMLGUIFactory as soon as the client
       * is added to the KXMLGUIFactory's GUI.
       */
      void setFactory( KXMLGUIFactory *factory );
      /**
       * Retrieve a pointer to the @ref KXMLGUIFactory this client is
       * associated with (will return 0L if the client's GUI has not been built
       * by a KXMLGUIFactory.
       */
      KXMLGUIFactory *factory() const;

      /**
       * KXMLGUIClients can form a simple child/parent object tree. This
       * method returns a pointer to the parent client or 0L if it has no
       * parent client assigned.
       */
      KXMLGUIClient *parentClient() const;

      /**
       * Use this method to make a client a child client of another client.
       * Usually you don't need to call this method, as it is called
       * automatically when using the second constructor, which takes a
       * arent argument.
       */
      void insertChildClient( KXMLGUIClient *child );

      /**
       * Remove the given @p child from the client's children list.
       */
      void removeChildClient( KXMLGUIClient *child );

      /**
       * Retrieve a list of all child clients.
       */
      const QList<KXMLGUIClient> *childClients();

      /**
       * A client can have an own @ref KXMLGUIBuilder.
       * Use this method to assign your builder instance to the client (so that the
       * @ref KXMLGUIFactory can use it when building the client's GUI)
       *
       * Client specific guibuilders are useful if you want to create
       * custom container widgets for your GUI.
       */
      void setClientBuilder( KXMLGUIBuilder *builder );

      /**
       * Retrieve the client's GUI builder or 0L if no client specific
       * uilder has been assigned via @ref #setClientBuilder()
       */
      KXMLGUIBuilder *clientBuilder() const;

      /**
       * Force this client to re-read its XML resource file.  This is
       * intended to be used when you know that the resource file has
       * changed and you will soon be rebuilding the GUI.  It has no
       * useful effect with non-KParts GUIs, so don't bother using it
       * unless your app is component based.
       */
      void reloadXML();

      void plugActionList( const QString &name, const QList<KAction> &actionList );
      void unplugActionList( const QString &name );

      static QString findMostRecentXMLFile( const QStringList &files, QString &doc );

    protected:
      /**
       * Set the instance (@ref KInstance) for this part.
       *
       * Call this first in the inherited class constructor.
       * (At least before @ref setXMLFile().)
       */
      virtual void setInstance( KInstance *instance );

      /**
       * Set the name of the rc file containing the XML for the part.
       *
       * Call this in the Part-inherited class constructor.
       *
       * @param file Either an absolute path for the file, or simply the
       *             filename, which will then be assumed to be installed
       *             in the "data" resource, under a directory named like
       *             the instance.
       * @param setXML Specify whether to call setXML. Default is true.
       *               and the DOM document at once.
       **/
      virtual void setXMLFile( const QString& file, bool merge = false, bool setXMLDoc = true );

      virtual void setLocalXMLFile( const QString &file );

      /**
       * Set the XML for the part.
       *
       * Call this in the Part-inherited class constructor if you
       *  don't call @ref setXMLFile().
       **/
      virtual void setXML( const QString &document, bool merge = false );

      /**
       * Set the Document for the part, describing the layout of the GUI.
       *
       * Call this in the Part-inherited class constructor if you don't call
       * @ref setXMLFile or @ref setXML .
       */
      virtual void setDOMDocument( const QDomDocument &document, bool merge = false );

      /**
       * This function will attempt to give up some memory after the GUI
       * is built.  It should never be used in apps where the GUI may be
       * rebuilt at some later time (components, for instance).
       */
      virtual void conserveMemory();

    private:
      bool mergeXML( QDomElement &base, const QDomElement &additive,
                     KActionCollection *actionCollection );
      QDomElement findMatchingElement( const QDomElement &base,
                                       const QDomElement &additive );

      static QString findVersionNumber( const QString &_xml );

      KXMLGUIClientPrivate *d;
    };

    #endif

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