Differential D8117 Diff 20378 src/KDbTableSchemaChangeListener.h

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src/KDbTableSchemaChangeListener.h

1	/* This file is part of the KDE project	1		/* This file is part of the KDE project
2	Copyright (C) 2003-2016 Jarosław Staniek <staniek@kde.org>	2		Copyright (C) 2003-2017 Jarosław Staniek <staniek@kde.org>
3		3
4	This program is free software; you can redistribute it and/or	4		This program is free software; you can redistribute it and/or
5	modify it under the terms of the GNU Library General Public	5		modify it under the terms of the GNU Library General Public
6	License as published by the Free Software Foundation; either	6		License as published by the Free Software Foundation; either
7	version 2 of the License, or (at your option) any later version.	7		version 2 of the License, or (at your option) any later version.
8		8
9	This program is distributed in the hope that it will be useful,	9		This program is distributed in the hope that it will be useful,
10	but WITHOUT ANY WARRANTY; without even the implied warranty of	10		but WITHOUT ANY WARRANTY; without even the implied warranty of
11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU	11		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	Library General Public License for more details.	12		Library General Public License for more details.
13		13
14	You should have received a copy of the GNU Library General Public License	14		You should have received a copy of the GNU Library General Public License
15	along with this program; see the file COPYING. If not, write to	15		along with this program; see the file COPYING. If not, write to
16	the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,	16		the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17	* Boston, MA 02110-1301, USA.	17		* Boston, MA 02110-1301, USA.
18	*/	18		*/
19		19
20	#ifndef KDB_KDBTABLESCHEMACHANGELISTENER_H	20		#ifndef KDB_KDBTABLESCHEMACHANGELISTENER_H
21		21
22	#include <kdb_export.h>	22		#include <kdb_export.h>
23	#include <KDbTristate>	23		#include <KDbTristate>
24		24
25	class KDbConnection;	25		class KDbConnection;
		26		class KDbQuerySchema;
26	class KDbTableSchema;	27		class KDbTableSchema;
		28		class KDbTableSchemaChangeListenerPrivate;
27		29
28	//! @short An interface allowing to listen for table schema changes	30		//! @short An interface allowing to listen for table schema changes
29	/**	31		/**
30	* The KDbTableSchemaChangeListener class can be used to listen for changes in table schema.	32		* The KDbTableSchemaChangeListener class can be used to listen for changes in table schema.
31	* For example query designer window that uses given table schema can be informed about	33		* For example query designer window that uses given table schema can be informed about
32	* planned changes and it can be decided about closing the window prior to changes in the schema.	34		* planned changes and it can be decided about closing the window prior to changes in the schema.
33	*/	35		*/
34	class KDB_EXPORT KDbTableSchemaChangeListener	36		class KDB_EXPORT KDbTableSchemaChangeListener
Show All 27 Lines		38	public:
62	/**	64		/**
63	* @return translated string that clearly identifies object that listens for changes	65		* @return translated string that clearly identifies object that listens for changes
64	* in a given table schema.	66		* in a given table schema.
65	*	67		*
66	* @see name()	68		* @see name()
67	*/	69		*/
68	void setName(const QString &name);	70		void setName(const QString &name);
69		71
70	//! @todo will be more generic	72		/** Registers @a listener for receiving (listening) information about changes in table schema
71	/** Registers @a listener for receiving (listening) information about changes	73		* @a table and all tables related to lookup fields. Changes can be related to altering and
72	in table schema @a table. Changes could be related to altering and removing. */	74		* removing.
		75		*/
73	static void registerForChanges(KDbConnection *conn,	76		static void registerForChanges(KDbConnection *conn,
74	KDbTableSchemaChangeListener* listener,	77		KDbTableSchemaChangeListener* listener,
75	const KDbTableSchema* table);	78		const KDbTableSchema* table);
76		79
77	/**	80		/**
		81		* Registers @a listener for receiving (listening) information about changes in query schema
		82		* @a query and all tables that the query uses.
		83		*
		84		* All tables related to lookup fields of these tables are also checked.
		85		* Changes can be related to table altering and removing.
		86		*/
		87		static void registerForChanges(KDbConnection *conn,
		88		KDbTableSchemaChangeListener* listener,
		89		const KDbQuerySchema* query);
		90
		91		/**
78	* Unregisters @a listener for receiving (listening) information about changes	92		* Unregisters @a listener for receiving (listening) information about changes
79	* in table schema @a table.	93		* in table schema @a table.
80	*/	94		*/
81	static void unregisterForChanges(KDbConnection *conn,	95		static void unregisterForChanges(KDbConnection *conn,
82	KDbTableSchemaChangeListener* listener,	96		KDbTableSchemaChangeListener* listener,
83	const KDbTableSchema* table);	97		const KDbTableSchema* table);
84		98
85	/**	99		/**
		100		* Unregisters all listeners for receiving (listening) information about changes
		101		* in table schema @a table.
		102		*/
		103		static void unregisterForChanges(KDbConnection *conn,
		104		const KDbTableSchema* table);
		105
		106		/**
86	* Unregisters @a listener for receiving (listening) information about changes	107		* Unregisters @a listener for receiving (listening) information about changes
87	* in any table schema.	108		* in any table or query schema.
88	*/	109		*/
89	static void unregisterForChanges(KDbConnection *conn,	110		static void unregisterForChanges(KDbConnection *conn,
90	KDbTableSchemaChangeListener* listener);	111		KDbTableSchemaChangeListener* listener);
91		112
92	/**	113		/**
		114		* Unregisters @a listener for receiving (listening) information about changes
		115		* in query schema @a query.
		116		*/
		117		static void unregisterForChanges(KDbConnection *conn,
		118		KDbTableSchemaChangeListener* listener,
		119		const KDbQuerySchema* query);
		120
		121		/**
		122		* Unregisters all listeners for receiving (listening) information about changes
		123		* in query schema @a query.
		124		*/
		125		static void unregisterForChanges(KDbConnection *conn,
		126		const KDbQuerySchema* query);
		127
		128		/**
		129		* @return list of all table schema listeners registered for receiving (listening)
		130		* information about changes in table schema @a table and other tables or queries depending
		131		* on @a table.
		132		*/
		133		static QList<KDbTableSchemaChangeListener > listeners(KDbConnection conn,
		134		const KDbTableSchema *table);
		135
		136		/**
93	* @return list of all table schema listeners registered for receiving (listening)	137		* @return list of all table schema listeners registered for receiving (listening)
94	* information about changes in table schema @a table.	138		* information about changes in query @a query and other tables or queries depending on @a query.
95	*/	139		*/
96	static QList<KDbTableSchemaChangeListener*> listeners(	140		static QList<KDbTableSchemaChangeListener > listeners(KDbConnection conn,
97	const KDbConnection conn, const KDbTableSchema table);	141		const KDbQuerySchema *query);
98		142
99	/**	143		/**
100	* Closes all table schema listeners for table schema @a table.	144		* Closes all table schema listeners for table schema @a table except for the ones from
101	* See KDbTableSchemaChangeListener::closeListener() for explanation	145		* the @a except list.
102	* of the operation of closing listener.	146		*
		147		* See KDbTableSchemaChangeListener::closeListener() for explanation of the operation
		148		* of closing listener.
		149		*
		150		* @return true if all listenters for the table schema @a table have been successfully closed
		151		* (returned true) or @c false or @c cancelled if at least one listener returned
		152		* @c false or @c cancelled, respectively.
		153		* Regardless of returned value, closeListener() is called on all listeners for @a table.
		154		*/
		155		static tristate closeListeners(KDbConnection conn, const KDbTableSchema table,
		156		const QList<KDbTableSchemaChangeListener*> &except
		157		= QList<KDbTableSchemaChangeListener*>());
		158
		159		/**
		160		* Closes all table schema listeners for query schema @a query except for the ones from
		161		* the @a except list.
		162		*
		163		* See KDbTableSchemaChangeListener::closeListener() for explanation of the operation
		164		* of closing listener.
		165		*
103	* @return true if all listenters for the table schema @a table have been successfully closed	166		* @return true if all listenters for the table schema @a table have been successfully closed
104	* (returned true) or @c false or @c cancelled if at least one listener returned	167		* (returned true) or @c false or @c cancelled if at least one listener returned
105	* @c false or @c cancelled, respectively.	168		* @c false or @c cancelled, respectively.
106	* Regardless of returned value, closeListener() is called on all listeners for @a table.	169		* Regardless of returned value, closeListener() is called on all listeners for @a table.
107	*/	170		*/
108	static tristate closeListeners(KDbConnection conn, const KDbTableSchema table);	171		static tristate closeListeners(KDbConnection conn, const KDbQuerySchema query,
		172		const QList<KDbTableSchemaChangeListener*> &except
		173		= QList<KDbTableSchemaChangeListener*>());
109		174
110	private:	175		private:
111	Q_DISABLE_COPY(KDbTableSchemaChangeListener)	176		Q_DISABLE_COPY(KDbTableSchemaChangeListener)
112	class Private;	177		KDbTableSchemaChangeListenerPrivate * const d;
113	Private * const d;
114	};	178		};
115		179
116	#endif	180		#endif