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com.trolltech.qt.core
Enum Qt.ConnectionType

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

public static enum Qt.ConnectionType
extends java.lang.Enum<Qt.ConnectionType>
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, qRegisterMetaType

Enum Constant Summary
AutoCompatConnection
          Internal.
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.
BlockingQueuedConnection
          Same as QueuedConnection, except that the current thread blocks until the slot has been delivered.
DirectConnection
          When emitted, the signal is immediately delivered to the slot.
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)
           
 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)
          Returns the enum constant of this type with the specified name.
static Qt.ConnectionType[] values()
          Returns an array containing the constants of this enum type, in the order they're declared.
 
Methods inherited from class java.lang.Enum
clone, compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 

Enum Constant 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
Internal.


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 final Qt.ConnectionType[] values()
Returns an array containing the constants of this enum type, in the order they're declared. This method may be used to iterate over the constants as follows:
for(Qt.ConnectionType c : Qt.ConnectionType.values())
        System.out.println(c);

Returns:
an array containing the constants of this enum type, in the order they're declared

valueOf

public static Qt.ConnectionType valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:
name - the name of the enum constant to be returned.
Returns:
the enum constant with the specified name
Throws:
java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

value

public int value()
Description copied from interface: QtEnumerator
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)

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