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authormickeyl <mickeyl>2004-04-21 16:54:01 (UTC)
committer mickeyl <mickeyl>2004-04-21 16:54:01 (UTC)
commit8d6f6d769e945eac05c7089964d1e2c764f0ee7a (patch) (side-by-side diff)
treec1b2ead6471f6f5d625b02e56c036e99186c655b /libopie2
parent7dc2ed4e55acf69b0edf01ded81f00b61c472312 (diff)
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add API documentation for OFileNotification
Diffstat (limited to 'libopie2') (more/less context) (ignore whitespace changes)
-rw-r--r--libopie2/opiecore/ofilenotify.h90
1 files changed, 87 insertions, 3 deletions
diff --git a/libopie2/opiecore/ofilenotify.h b/libopie2/opiecore/ofilenotify.h
index 13b5a6b..bd2f9d0 100644
--- a/libopie2/opiecore/ofilenotify.h
+++ b/libopie2/opiecore/ofilenotify.h
@@ -44,6 +44,26 @@ _;:,     .>    :=|. This program is free software; you can
namespace Opie {
namespace Core {
+/*======================================================================================
+ * OFileNotificationType
+ *======================================================================================*/
+
+/**
+ * @brief An enumerate for the different types of file notifications
+ *
+ * This enumerate provides a means to specify the type of events that you are interest in.
+ * Valid values are:
+ * <ul>
+ * <li>Access: The file was accessed (read)
+ * <li>Modify The file was modified (write,truncate)
+ * <li>Create = The file was created in the directory
+ * <li>Delete = The file was unlinked from directory
+ * <li>Rename = The file was renamed
+ * <li>Attrib = The file had its attributes changed (chmod,chown,chgrp)
+ * </ul>
+ *
+ **/
+
enum OFileNotificationType { Single = 0x0000000,
Multi = DN_MULTISHOT,
Access = DN_ACCESS,
@@ -53,6 +73,22 @@ enum OFileNotificationType { Single = 0x0000000,
Rename = DN_RENAME,
Attrib = DN_ATTRIB };
+/*======================================================================================
+ * OFileNotification
+ *======================================================================================*/
+
+/**
+ * @brief Represents a file notification
+ *
+ * This class allows to watch for events happening to files.
+ * It uses the dnotify kernel interface which is a very efficient signalling interface.
+ *
+ * @see <file:///usr/src/linux/Documentation/dnotify.txt>
+ *
+ * @author Michael 'Mickey' Lauer <mickey@vanille.de>
+ *
+ **/
+
class OFileNotification : public QObject
{
Q_OBJECT
@@ -60,18 +96,63 @@ class OFileNotification : public QObject
public:
OFileNotification( QObject* parent = 0, const char* name = 0 );
~OFileNotification();
-
+ /**
+ * This static function calls a slot when an event with @a type happens to file @a path.
+ *
+ * It is very convenient to use this function because you do not need to
+ * bother with a timerEvent or to create a local QTimer object.
+ *
+ * Example:
+ * <pre>
+ *
+ * #include <opie2/oapplication.h>
+ * #include <opie2/onitify.h>
+ * using namespace Opie::Core;
+ *
+ * int main( int argc, char **argv )
+ * {
+ * OApplication a( argc, argv, "File Notification Example" );
+ * OFileNotification::singleShot( "/tmp/quit", &a, SLOT(quit()), Create );
+ * ... // create and show your widgets
+ * return a.exec();
+ * }
+ *
+ * This sample program automatically terminates when the file "/tmp/quite" has been created.
+ *
+ *
+ * The @a receiver is the receiving object and the @a member is the slot.
+ **/
static void singleShot( const QString& path, QObject* receiver, const char* member, OFileNotificationType type = Modify );
-
+ /**
+ * Starts to watch for @a type changes to @a path. Set @a sshot to True if you want to be notified only once.
+ * Note that in that case it may be more convenient to use @ref OFileNotification::singleShot() then.
+ **/
int start( const QString& path, bool sshot = false, OFileNotificationType type = Modify );
+ /**
+ * Stop watching for file events.
+ **/
void stop();
-
+ /**
+ * @returns the notification type as set by @ref start().
+ **/
OFileNotificationType type() const;
+ /**
+ * @returns the path to the file being watched by this instance.
+ **/
QString path() const;
+ /**
+ * @returns the UNIX file descriptor for the file being watched.
+ **/
int fileno() const;
+ /**
+ * @returns if a file is currently being watched.
+ **/
bool isActive() const;
signals:
+ /**
+ * This signal is emitted if an event happens of the specified type happens to the file being watched.
+ **/
void triggered();
protected:
@@ -90,13 +171,16 @@ class OFileNotification : public QObject
struct stat _stat;
};
+#if 0
class ODirectoryNotification : public OFileNotification
{
+
public:
virtual bool hasChanged() { return true; };
};
+#endif
}
}