/* This file is part of the KDE project
   Copyright (C) 2004 Cedric Pasteur <cedric.pasteur@free.fr>
   Copyright (C) 2004 Jaroslaw Staniek <js@iidea.pl>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

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

#ifndef FORMCONNECTIONDIALOG_H
#define FORMCONNECTIONDIALOG_H

#include <tqintdict.h>
#include <kdialogbase.h>

namespace KexiDB {
	class ResultInfo;
}

class TQLabel;
class TQButton;
class KexiTableView;
class KexiTableViewData;
class KexiTableItem;

namespace KFormDesigner {

class Form;
class ConnectionBuffer;
class Connection;


/*! This dialog is used to edit the connections of a form. It uses KexiTableView for this. There is also a details widget (icon + text)) that shows correctness
  of current connection.  */
class KFORMEDITOR_EXPORT ConnectionDialog : public KDialogBase
{
	Q_OBJECT
  

	public:
		ConnectionDialog(TQWidget *parent);
		~ConnectionDialog() {;}

		/*! Displays as modal dialog, to edit connections in Form::connectionBuffer(). */
		void exec(Form *form);

	protected:
		/*! Used when connection is ok. Displays a message in details widget and changes icon in 'OK?' column. */
		void setStatusOk(KexiTableItem *item = 0);
		/*! Used when connection is wrong. Displays a message in details widget and changes icon in 'OK?' column. \a msg is
		  the message explaining what's wrong. */
		void setStatusError(const TQString &msg, KexiTableItem *item = 0);
		//! Inits table data, columns, etc.
		void initTable();
		/*! Updates the widget list (shown in receiver and sender columns). Then fill in the table with the connections in m_buffer. */
		void updateTableData();
		/*! Updates the slot list, according to the receiver name, and only shows those who are compatible with signal args. */
		void updateSlotList(KexiTableItem *item);
		//! Updates the signal list, according to the sender name.
		void updateSignalList(KexiTableItem *item);

	protected slots:
		/*! Slot called when the user modifies a cell. Signal and/or slot cells are cleared if necessary (not valid anymore). */
		void slotCellChanged(KexiTableItem*, int, TQVariant&, KexiDB::ResultInfo*);
		/*! This function checks if the connection represented by KexiTableItem \a item is valid. It checks if all args (sender, receiver, signal and slot)
		 are given, and then if signal/slot args are compatible (should be always true, as we don't show non-compatible slots). It calls \ref setStatusOk()
		 or \ref setStatusError() following the result of checks. */
		void checkConnection(KexiTableItem *item);

		/*! Hides the dialog and allow the user to create the Connection by drag-and-drop in the Form itself. Currently disabled in the GUI.
		 \sa FormManager::startCreatingConnection()  */
		void newItemByDragnDrop();
		/*! Creates a new item. It just moves the cursor to the last empty row. */
		void newItem();
		void removeItem();

		/*! This slot is called when the user ends connection creation (when in drag-and-drop mode). The dialog is restored,
		  and the created connection is added to the list. */
		void slotConnectionCreated(KFormDesigner::Form *form, KFormDesigner::Connection &connection);
		/*! This slot is called when the user aborts connection creation (when in drag-and-drop mode). The dialog is restored,
		  and an empty connection is created. */
		void slotConnectionAborted(KFormDesigner::Form *form);

		void slotCellSelected(int col, int row);
		void slotRowInserted(KexiTableItem*,bool);

		/*! Slot called when the user presses 'Ok' button. The Form::connectionBuffer() is deleted, created again and filled with Connection.
		 If the user presses 'Cancel', nothing happens. */
		virtual void slotOk();

	protected:
		enum {BAdd = 10, BRemove};
		Form    *m_form;
		ConnectionBuffer *m_buffer;
		KexiTableView  *m_table;
		KexiTableViewData  *m_data;
		KexiTableViewData *m_widgetsColumnData, *m_slotsColumnData, *m_signalsColumnData;
		TQLabel  *m_pixmapLabel, *m_textLabel;
		TQIntDict<TQButton>  m_buttons;  //! dict of button (for disabling them)
};

}

#endif