com.trolltech.qt.core
Class Qt.ConnectionType

java.lang.Object
  extended by java.lang.Enum
      extended by com.trolltech.qt.core.Qt.ConnectionType
All Implemented Interfaces:
QtEnumerator, java.io.Serializable, java.lang.Comparable
Enclosing interface:
Qt

public static final class Qt.ConnectionType
extends java.lang.Enum
implements QtEnumerator

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. 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

QObject::connect: Cannot queue arguments of type 'MyType'
call qRegisterMetaType() to register the data type before you establish the connection.

See also:
Thread Support in Qt, QObject::connect(), and qRegisterMetaType().

See Also:
Serialized Form

Field Summary
static Qt.ConnectionType AutoCompatConnection
           
static Qt.ConnectionType 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 .
static Qt.ConnectionType BlockingQueuedConnection
          Same as QueuedConnection , except that the current thread blocks until the slot has been delivered.
static Qt.ConnectionType DirectConnection
          When emitted, the signal is immediately delivered to the slot.
static Qt.ConnectionType QueuedConnection
          When emitted, the signal is queued until the event loop is able to deliver it to the slot.
 
Method Summary
static Qt.ConnectionType resolve(int value)
          Returns the Qt$ConnectionType constant with the specified int.
 int value()
          This function should return an integer value for the enum values of the enumeration that implements this interface.
static Qt.ConnectionType valueOf(java.lang.String name)
           
static Qt.ConnectionType[] values()
           
 
Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 

Field Detail

AutoConnection

public static final Qt.ConnectionType 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 .


DirectConnection

public static final Qt.ConnectionType DirectConnection
When emitted, the signal is immediately delivered to the slot.


QueuedConnection

public static final Qt.ConnectionType QueuedConnection
When emitted, the signal is queued until the event loop is able to deliver it to the slot.


AutoCompatConnection

public static final Qt.ConnectionType AutoCompatConnection

BlockingQueuedConnection

public static final Qt.ConnectionType 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 dead locks in your application.

Method Detail

values

public static Qt.ConnectionType[] values()

valueOf

public static Qt.ConnectionType valueOf(java.lang.String name)

value

public int value()
This function should return an integer value for the enum values of the enumeration that implements this interface.

Specified by:
value in interface QtEnumerator

resolve

public static Qt.ConnectionType resolve(int value)
Returns the Qt$ConnectionType constant with the specified int.