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diff --git a/parts/fileview/filetreeviewwidgetimpl.h b/parts/fileview/filetreeviewwidgetimpl.h
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+/***************************************************************************
+ *   Copyright (C) 2003 by Mario Scalas                                    *
+ *   mario.scalas@libero.it                                                *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef FILETREEVIEWWIDGETIMPL_H
+#define FILETREEVIEWWIDGETIMPL_H
+
+#include <qobject.h>
+#include <qvaluelist.h>
+#include <kfiletreeview.h>
+#include <qdom.h>
+
+#include "fileitemfactory.h"
+
+class FileTreeWidget;
+namespace filetreeview
+{
+    class FileTreeViewItem;
+    class FileTreeBranchItem;
+    class BranchItemFactory;
+}
+class FileViewPart;
+class QHeader;
+class KToggleAction;
+class QPopupMenu;
+
+/**
+* @author Mario Scalas
+* A base class for providing additional features to the standard KFileTreeViewItem-based widget we
+* use for listing files in project directory.
+*/
+class FileTreeViewWidgetImpl : public QObject
+{
+    Q_OBJECT
+public:
+    FileTreeViewWidgetImpl( FileTreeWidget *parent, const char *name );
+    virtual ~FileTreeViewWidgetImpl();
+
+    //! return a list containing the filenames of the currently selected items.
+    KURL::List selectedPathUrls();
+    // shortcuts
+    FileTreeWidget *fileTree() const;
+    QDomDocument &projectDom() const;
+    QHeader *header() const { return fileTree()->header(); }
+    void setColumnWidth( int column, int w ) { fileTree()->setColumnWidth( column, w ); }
+    int contentsWidth() const { return fileTree()->contentsWidth(); }
+    void triggerUpdate() { fileTree()->triggerUpdate(); }
+    FileViewPart *part() const { return m_part; }
+    filetreeview::FileTreeViewItem *currentItem() const { return  static_cast<filetreeview::FileTreeViewItem*>( fileTree()->currentItem() ); }
+    /**
+    * @return a reference to a new filetreeview::BranchItemFactory object which can be used for filling
+    * the tree view.
+    */
+    filetreeview::BranchItemFactory *branchItemFactory() const { return m_branchItemFactory; }
+    /**
+    * Costraints that must be satisfied to start a reload of the the tree.
+    * @return
+    */
+    virtual bool canReloadTree() const = 0;
+    /**
+    * Here the popup menu is filled: by standard only the "reload tree" (only if the above function
+    * returns true) and "show project files" options are added
+    * @param popupMenu the menu to fill
+    * @param item the QListViewItem which this menu has been requested upon
+    */
+    virtual void fillPopupMenu( QPopupMenu *popupMenu, QListViewItem *item ) const;
+    /**
+    * @return true if non project files are to be shown, false otherwise
+    */
+    bool showNonProjectFiles() const;
+
+signals:
+    /**
+    * Emitted when the current implementation "recognizes" it cannot work anymore: for example the VCS impl.
+    * can ask to be relieved from work when the VCS plug-in it uses has been unloaded!
+    */
+    void implementationInvalidated();
+
+private slots:
+    void slotReloadTree();
+    void slotToggleShowNonProjectFiles();
+
+protected:
+    void setBranchItemFactory( filetreeview::BranchItemFactory *aFactory ) { m_branchItemFactory = aFactory; }
+    QString projectDirectory() const;
+
+private:
+	QValueList<QListViewItem*> allSelectedItems( QListViewItem * item ) const;
+    filetreeview::BranchItemFactory *m_branchItemFactory;
+
+    FileViewPart *m_part;
+
+    bool m_isReloadingTree;
+
+    KToggleAction *m_actionToggleShowNonProjectFiles;
+};
+
+#endif