/**
 This file is part of Kig, a KDE program for Interactive Geometry...
 Copyright (C) 2002  Dominique Devriese <devriese@kde.org>

 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.

 This program 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 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
 USA
**/

#ifndef KIG_MODES_POPUP_H
#define KIG_MODES_POPUP_H

#include <kmenu.h>

#include <vector>

class QAction;
class KigPart;
class KigWidget;
class NormalMode;
class PopupActionProvider;
class ObjectHolder;

/**
 * This is the popup menu that appears when you click on selected
 * objects in NormalMode..  It's quite complex, since it has to fetch
 * a lot of information from various places, and dispatch it again
 * when the user selects something.
 * Update: I'm also using it for when you clicked on an empty space in
 * the document, because the difference between the two cases is not
 * that important, and this class is generic enough to handle both
 * cases..  When this is the case, mobjs is empty, some
 * PopupActionProviders are disabled, and some others enabled..
 */
class NormalModePopupObjects
  : public KMenu
{
  Q_OBJECT

public:
  NormalModePopupObjects( KigPart& part, KigWidget& view,
                          NormalMode& mode, 
                          const std::vector<ObjectHolder*>& objs, const QPoint& p );
  ~NormalModePopupObjects();

  // the different "menu's", the toplevel is considered as just
  // another menu..
  enum { TransformMenu = 0, TestMenu, ConstructMenu, StartMenu, ShowMenu,
         SetColorMenu, SetSizeMenu, SetStyleMenu, ToplevelMenu,
         SetCoordinateSystemMenu, NumberOfMenus };

  // used by the PopupActionProvider's to add actions to us..
  QAction* addInternalAction( int menu, const QString& name, int id );
  QAction* addInternalAction( int menu, const QIcon& icon, const QString& name, int id );
  QAction* addInternalAction( int menu, const QIcon& pix, int id );
  QAction* addInternalAction( int menu, QAction* act );

  std::vector<ObjectHolder*> objects() const { return mobjs; }
  KigPart& part() { return mpart; }
  KigWidget& widget() { return mview; }
  QPoint plc() { return mplc; }

  bool onlyLabels() const { return monlylabels; }

protected:
  void activateAction( int menu, int action );

private slots:
  void toplevelMenuSlot( QAction* );

protected:
  QPoint mplc;
  KigPart& mpart;
  KigWidget& mview;
  std::vector<ObjectHolder*> mobjs;
  NormalMode& mmode;

  std::vector<PopupActionProvider*> mproviders;

  QMenu* mmenus[NumberOfMenus];
  QMenu* mmenuslast[NumberOfMenus];
  /* mp: usually mmenus[i] = mmenuslast[i], however, if there are too many entries
   * in the submenu, new subsubmenus are added and mmenuslast[i] points to
   * the last of these (where new actions can be inserted)
   * presently this happens only in the "start" menu for a point
   */

private:
  bool monlylabels;
};

/**
 * This class is useful to choose one object from a list of some, by
 * querying the user via popup menu.
 *
 * You can't use this class directly, but these's a convenience method.
 */
class ObjectChooserPopup
  : public KMenu
{
  Q_OBJECT

public:
  /**
   * Get the index of the chosen object from a list of objects.
   *
   * \param p is the point where execute the popup
   * \param w is the pointer to a KigWidget
   * \param objs is the vector with the objects to chose from
   * \param givepopup true means that we have to show a popup to the user
   *
   * \return the index of the chosen element ( starting from 0 ), or -1
   *         if none was selected.
   */
  static int getObjectFromList( const QPoint& p, KigWidget* w,
                                const std::vector<ObjectHolder*>& objs,
                                bool givepopup = true );

protected:
  ObjectChooserPopup( const QPoint& p, KigWidget& view,
                      const std::vector<ObjectHolder*>& objs );
  ~ObjectChooserPopup();

protected slots:
  void actionActivatedSlot( QAction* );

protected:
  QPoint mplc;
  KigWidget& mview;
  std::vector<ObjectHolder*> mobjs;

  int mselected;
};

#endif