--- a/src/corelib/global/qnamespace.qdoc Tue Feb 02 00:43:10 2010 +0200
+++ b/src/corelib/global/qnamespace.qdoc Fri Feb 19 23:40:16 2010 +0200
@@ -1,6 +1,6 @@
/****************************************************************************
**
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
@@ -134,7 +134,6 @@
\value AA_DontShowIconsInMenus Actions with the Icon property won't be
shown in any menus unless specifically set by the
QAction::iconVisibleInMenu property.
-
Menus that are currently open or menus already created in the native
Mac OS X menubar \e{may not} pick up a change in this attribute. Changes
in the QAction::iconVisibleInMenu property will always be picked up.
@@ -164,6 +163,12 @@
Command+C on the keyboard regardless of the value set, though what is output for
QKeySequence::toString(QKeySequence::PortableText) will be different).
+ \value AA_S60DontConstructApplicationPanes Stops Qt from initializing the S60 status
+ pane and softkey pane on Symbian. This is useful to save memory and reduce
+ startup time for applications that will run in fullscreen mode during their
+ whole lifetime. This attribute must be set before QApplication is
+ constructed.
+
\omitvalue AA_AttributeCount
*/
@@ -509,45 +514,58 @@
/*!
\enum Qt::ConnectionType
- This enum describes the types of connection that can be used between signals and
- slots. In particular, it determines whether a particular signal is delivered to a
- slot immediately or queued for delivery at a later time.
-
- \value DirectConnection When emitted, the signal is immediately delivered to the slot.
- \value QueuedConnection When emitted, the signal is queued until the event loop is
- able to deliver it to the slot.
+ This enum describes the types of connection that can be used
+ between signals and slots. In particular, it determines whether a
+ particular signal is delivered to a slot immediately or queued for
+ delivery at a later time.
+
+ \value AutoConnection
+ (default) Same as DirectConnection, if the emitter and
+ receiver are in the same thread. Same as QueuedConnection,
+ if the emitter and receiver are in different threads.
+
+ \value DirectConnection
+ The slot is invoked immediately, when the signal is
+ emitted.
+
+ \value QueuedConnection
+ The slot is invoked when control returns to the event loop
+ of the receiver's thread. The slot is executed in the
+ receiver's thread.
+
\value BlockingQueuedConnection
- Same as QueuedConnection, except that the current thread blocks
- until the slot has been delivered. This connection type should
- only be used for receivers in a different thread. Note that misuse
- of this type can lead to deadlocks in your application.
- \value AutoConnection If the signal is emitted from the thread
- in which the receiving object lives, the
- slot is invoked directly, as with
- Qt::DirectConnection; otherwise the
- signal is queued, as with
- Qt::QueuedConnection.
- \value UniqueConnection Same as AutoConnection, but there will be a check that the signal is
- not already connected to the same slot before connecting, otherwise,
- the connection will fail.
- This value was introduced in Qt 4.6.
+ Same as QueuedConnection, except the current thread blocks
+ until the slot returns. This connection type should only be
+ used where the emitter and receiver are in different
+ threads. \note Violating this rule can cause your
+ application to deadlock.
+
+ \value UniqueConnection
+ Same as AutoConnection, but the connection is made only if
+ it does not duplicate an existing connection. i.e., if the
+ same signal is already connected to the same slot for the
+ same pair of objects, then the connection will fail. This
+ connection type was introduced in Qt 4.6.
+
\value AutoCompatConnection
- The default connection type for signals and slots when Qt 3 support
- is enabled. Equivalent to AutoConnection for connections but will cause warnings
- to be output under certain circumstances. See
- \l{Porting to Qt 4#Compatibility Signals and Slots}{Compatibility Signals and Slots}
- for further information.
-
- With queued connections, the parameters must be of types that are known to
- Qt's meta-object system, because Qt needs to copy the arguments to store them
- in an event behind the scenes. If you try to use a queued connection and
- get the error message
+ The default type when Qt 3 support is enabled. Same as
+ AutoConnection but will also cause warnings to be output in
+ certain situations. See \l{Porting to Qt 4#Compatibility
+ Signals and Slots}{Compatibility Signals and Slots} for
+ further information.
+
+ With queued connections, the parameters must be of types that are
+ known to Qt's meta-object system, because Qt needs to copy the
+ arguments to store them in an event behind the scenes. If you try
+ to use a queued connection and get the error message:
\snippet doc/src/snippets/code/doc_src_qnamespace.qdoc 0
- call qRegisterMetaType() to register the data type before you
+ Call qRegisterMetaType() to register the data type before you
establish the connection.
+ When using signals and slots with multiple threads, see \l{Signals and Slots Across Threads}.
+
\sa {Thread Support in Qt}, QObject::connect(), qRegisterMetaType()
*/