/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            widget.h
 *
 *  Tue Jul 17 12:15:59 CEST 2007
 *  Copyright 2007 Bent Bisballe Nyeng and Lars Bisballe Jensen
 *  deva@aasimon.org and elsenator@gmail.com
 ****************************************************************************/

/*
 *  This file is part of Pracro.
 *
 *  Pracro 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.
 *
 *  Pracro 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 Pracro; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#ifndef __PRACRO_WIDGET_H__
#define __PRACRO_WIDGET_H__

#include <QString>
#include <QDomNode>
#include <QRegExp>
#include <QObject>
#include <QVector>

#include "lua.h"

class QLayout;
class MacroWindow;
class LUA;
class Widget;
class Widget : public QObject {
Q_OBJECT
public:
  Widget(QDomNode &node, MacroWindow *macrowindow);
  virtual ~Widget();

  QString name();
  QString type();
  bool local();

  virtual QString value() = 0;
  virtual void setValue(QString value, QString source) = 0;

  // Set deep to true to validate inner widgets.
  bool valid(bool deep = false);
  void setValid(bool valid, bool deep = false);

  // Implement in subclasses to contribute to the validation.
  virtual bool preValid() { return true; }

  // Implement in subclasses to change widget according to validation status.
  virtual void setWdgValid(bool valid) = 0;

  virtual void setEnabled(bool enabled);
  virtual bool enabled();

  virtual void setVisible(bool visible);
  virtual bool visible();

  virtual bool setKeyboardFocus();

  QWidget *qwidget() { return widget; }
  
  // Set deep to true to search through inner widgets.
  Widget *findWidget(QString name, bool deep = false);
  QVector< Widget* > widgetList(bool deep = false);
  void addChild(Widget *widget);
  void setValues();

signals:
  void wasChanged();

  /*
   * LUA scripting events:
   */
  void eventOnChange(bool deep = false);
  void eventOnInit(bool deep = false);

public slots:
  void childWasChanged();
  void runEventOnChange(bool deep = false);
  void runEventOnInit(bool deep = false);

protected:
  QWidget *widget;
  bool hideChildren;

  void addChildren(QDomNode &xml_node, QLayout *layout);

  LUA *lua;

  void createWidget(QDomNode &xml_node, QLayout *layout);
  QVector< Widget* > children;

  void setWdgValidRecursive(bool valid);

  // Store value in constructor to be set later.
  bool has_lazy;
  QString lazy_value;
  QString lazy_source;

  bool is_valid;
  QString widget_name;
  QString widget_type;
  bool widget_local;

  MacroWindow *macrowindow;

  bool hasOnChangeEvent;
  QString onChangeEventScript;

  bool hasOnInitEvent;
  QString onInitEventScript;
};

int wdg_name(lua_State *L);
int wdg_type(lua_State *L);
int wdg_value(lua_State *L);
int wdg_set_value(lua_State *L);
int wdg_enabled(lua_State *L);
int wdg_set_enabled(lua_State *L);
int wdg_visible(lua_State *L);
int wdg_set_visible(lua_State *L);
int wdg_valid(lua_State *L);
int wdg_set_valid(lua_State *L);

#define WDG_METHS \
  {"name", wdg_name},\
  {"type", wdg_type},\
  {"value", wdg_value},\
  {"setValue", wdg_set_value},\
  {"enabled", wdg_enabled},\
  {"setEnabled", wdg_set_enabled},\
  {"visible", wdg_visible},\
  {"setVisible", wdg_set_visible},\
  {"valid", wdg_valid},\
  {"setValid", wdg_set_valid}

const struct luaL_Reg wdg_meths[] =
  { WDG_METHS, {NULL, NULL} };

inline void register_widget(lua_State *L)
{
  luaL_newmetatable(L, "Widget");
  lua_pushliteral(L, "__index");
  lua_pushvalue(L, -2);
  lua_rawset(L, -3);
  luaL_register(L, NULL, wdg_meths);
}

#endif/*__PRACRO_WIDGET_H__*/