/***************************************************************************
                          locationdialog.h  -  Trinity Desktop Planetarium
                             -------------------
    begin                : Sun Feb 11 2001
    copyright            : (C) 2001 by Jason Harris
    email                : jharris@30doradus.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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef LOCATIONDIALOG_H
#define LOCATIONDIALOG_H

/**@class LocationDialog
	*Dialog for changing the geographic location of the observer.  The
	*dialog is divided into two sections.
	*
	*The top section allows the location to be selected from a database
	*of 2000 cities.  It contains a MapCanvas (showing map of the globe
	*with cities overlaid, with a handler for mouse clicks), a TQListBox
	*containing the names of cities in the database, and three KLineEdit
	*widgets, which allow the user to filter the List by the name of the
	*City, Province, and Country.  In addition, the List
	*can be filtered by location, by clicking anywhere in the MapCanvas.
	*Doing so will display cities within 2 degrees of the clicked position.
	*
	*The bottom section allows the location to be specified manually.
	*The Longitude, Latitude, City name, Province/State name, and Country name
	*are entered into KLineEdits.  There is also a TQPushButton for adding the
	*location to the custom Cities database.  If the user selects "Add" without
	*filling in all of the manual entry fields, an error message is displayed.
	*@short Geographic Location dialog
	*@author Jason Harris
	*@version 1.0
	*/
#include <kdialogbase.h>
#include "geolocation.h"

class TQVBoxLayout;
class TQHBoxLayout;
class TQGridLayout;
class TQGroupBox;
class TQLabel;
class TQListBox;
class TQListBoxItem;
class TQPushButton;
class TQComboBox;
class KLineEdit;
class MapCanvas;
class dmsBox;

class LocationDialog : public KDialogBase {
	Q_OBJECT
  

public: 
/**
	*Constructor.  Create all widgets, and pack them into TQLayouts.
	*Connect Signals to Slots.  Run initCityList().
	*/
	LocationDialog( TQWidget* parent = 0 );
/**
	*Destructor (empty)
	*/
	~LocationDialog();

/**
	*Initialize list of cities.  Note that the database is not read in here,
	*that is done in the KStars constructor.  This simply loads the local TQListBox
	*with the names of the cities from the kstarsData object.
	*/
  void initCityList( void );

/**@return pointer to the highlighted city in the List.
	*/
	GeoLocation* selectedCity() const { return SelectedCity; }
	
/**@return pointer to the List of filtered city pointers.
 */
	TQPtrList<GeoLocation>* filteredList() { return &filteredCityList; }
	
/**@short Show only cities within 3 degrees of point specified by arguments
	*@param longitude the longitude of the search point (int)
	*@param latitude the latitude of the search point (int)
	*/
	void findCitiesNear( int longitude, int latitude );

/**@return the city name of the selected location.
	*/
	TQString selectedCityName( void ) const { return SelectedCity->translatedName(); }

/**@return the province name of the selected location.
	*/
	TQString selectedProvinceName( void ) const { return SelectedCity->translatedProvince(); }

/**@return the country name of the selected location.
	*/
	TQString selectedCountryName( void ) const { return SelectedCity->translatedCountry(); }

/**@return true if the AddCityBUtton is enabled
	*/
	bool addCityEnabled();

public slots:
/**
	*When text is entered in the City/Province/Country Filter KLineEdits,
	*the List of cities is trimmed to show only cities beginning with the entered text.
	*Also, the TQMemArray of ID numbers is kept in sync with the filtered list.
	*/
  void filterCity( void );

/**
	*When the selected city in the TQListBox changes, repaint the MapCanvas
	*so that the crosshairs icon appears on the newly selected city.
	*/
	void changeCity( void );

/**
	*When the "Add new city" TQPushButton is clicked, add the manually-entered
	*city information to the user's custom city database.
	*/
	void addCity( void );

	void clearFields( void );
	void showTZRules( void );
	void nameChanged( void );
	void dataChanged( void );
//	void prepareToAccept( void );
	void slotOk();

private:
/**
	*Make sure Longitude and Latitude values are valid.
	*/
	bool checkLongLat( void );
	
	bool dataModified, nameModified, bCityAdded;
	TQGridLayout *glay, *glay2;
	TQHBoxLayout *hlay, *hlayCoord, *hlayTZ, *hlayButtons, *hlay3;
	TQVBoxLayout *RootLay, *CityLay, *CoordLay, *vlay;
	TQGroupBox *CityBox, *CoordBox;
	TQLabel *CityFiltLabel, *ProvinceFiltLabel, *CountryFiltLabel;
	TQLabel *NewCityLabel, *NewProvinceLabel, *NewCountryLabel;
	TQLabel *LongLabel, *LatLabel, *CountLabel;
	TQLabel *TZLabel, *TZRuleLabel;
	KLineEdit *NewCityName, *NewProvinceName, *NewCountryName;
	KLineEdit *CityFilter, *ProvinceFilter, *CountryFilter;
	dmsBox *NewLong, *NewLat;
	TQComboBox *TZBox, *TZRuleBox;
	TQPushButton *AddCityButton, *ClearFields, *ShowTZRules;
	MapCanvas *MapView;
	TQListBox *GeoBox;

	GeoLocation *SelectedCity;
	TQPtrList<GeoLocation> filteredCityList;
};

#endif
