Class QWatcherDB

QWatcher is a helper class that allows controls and forms to watch database tables and automatically redraw when changes are detected. It works together with the codegened model classes, the controls, and the QForm class to draw or refresh when needed.

Static functions handle the database updating, while member variables store the current state of a control's watched tables.

This Base class is a template on which to build watchers that use specific caching mechanisms. See QWatcher to select the caching mechanism you would like to use.

QBaseClass

QWatcherBase

QWatcherDB

Located at includes/watchers/QWatcherDB.class.php

Methods summary
`public`	# `MakeCurrent( )` Override Override
`public boolean`	# `IsCurrent( )` Returns true if the watcher is up to date, and false if something has changed. Caches the results so it only hits the database minimally for each read. Returns true if the watcher is up to date, and false if something has changed. Caches the results so it only hits the database minimally for each read. Returns boolean
`public static`	# `MarkTableModified( string $strDbName, $strTableName )` Override Override Parameters `$strDbName` $strTableName `$strTableName` Throws `QCallerException` Overrides `QWatcherBase::MarkTableModified()`

Methods inherited from QWatcherBase
`GetKey(), RegisterTable(), Watch(), WatchersChanged()`

Methods inherited from QBaseClass
`OverrideAttributes(), __call(), __get(), __set()`

Properties summary
`public static`	`$intDbIndex` The table name which will keep info about changed tables. It must have the following columns: 1. table_key: varchar(largest key size) 2. time: varchar(30) The table name which will keep info about changed tables. It must have the following columns: 1. table_key: varchar(largest key size) 2. time: varchar(30)	# `__WATCHER_DB_INDEX__`
`public static`	`$strTableName`	# `__WATCHER_TABLE_NAME__`

Properties inherited from QWatcherBase
`$blnWatcherChanged, $strAppKey, $strWatchedKeys`

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Class QWatcherDB

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