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PopUpWidget.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2004 The ScummVM project
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/gui/PopUpWidget.h,v 1.12 2004/04/09 15:10:23 fingolfin Exp $
 */

#ifndef POPUPWIDGET_H
#define POPUPWIDGET_H

#include "gui/widget.h"
#include "common/str.h"
#include "common/array.h"

namespace GUI {

enum {
      kPopUpItemSelectedCmd   = 'POPs'
};

/**
 * Popup or dropdown widget which, when clicked, "pop up" a list of items and
 * lets the user pick on of them.
 *
 * Implementation wise, when the user selects an item, then a kPopUpItemSelectedCmd 
 * is broadcast, with data being equal to the tag value of the selected entry.
 */
00041 class PopUpWidget : public Widget, public CommandSender {
      friend class PopUpDialog;
      typedef Common::String String;

      struct Entry {
            String      name;
            uint32      tag;
      };
      typedef Common::Array<Entry> EntryList;
protected:
      EntryList         _entries;
      int                     _selectedItem;

      String                  _label;
      uint              _labelWidth;

public:
      PopUpWidget(GuiObject *boss, int x, int y, int w, int h, const String &label, uint labelWidth = 0);

      void handleMouseDown(int x, int y, int button, int clickCount);

      void appendEntry(const String &entry, uint32 tag = (uint32)-1);
      void clearEntries();

      /** Select the entry at the given index. */
      void setSelected(int item);
      
      /** Select the first entry matching the given tag. */
      void setSelectedTag(uint32 tag);

      int getSelected() const                               { return _selectedItem; }
      uint32 getSelectedTag() const                   { return (_selectedItem >= 0) ? _entries[_selectedItem].tag : (uint32)-1; }
      const String& getSelectedString() const         { return (_selectedItem >= 0) ? _entries[_selectedItem].name : String::emptyString; }

protected:
      void drawWidget(bool hilite);
};

} // End of namespace GUI

#endif

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