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Internal/Contributor docs for the Qt SDK. Note: These are NOT official API docs; those are found at https://doc.qt.io/
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QPropertyBindingError Class Reference

\inmodule QtCore More...

#include <qproperty.h>

Collaboration diagram for QPropertyBindingError:

Public Types

enum  Type { NoError , BindingLoop , EvaluationError , UnknownError }
 This enum specifies which error occurred. More...

Public Member Functions

 QPropertyBindingError ()
 Default constructs QPropertyBindingError.
 QPropertyBindingError (Type type, const QString &description=QString())
 Constructs a QPropertyBindingError of type type with description as its description.
 QPropertyBindingError (const QPropertyBindingError &other)
 Copy-constructs QPropertyBindingError from other.
QPropertyBindingError & operator= (const QPropertyBindingError &other)
 Copies other to this QPropertyBindingError.
 QPropertyBindingError (QPropertyBindingError &&other)
 Move-constructs QPropertyBindingError from other.
QPropertyBindingError & operator= (QPropertyBindingError &&other)
 Move-assigns other to this QPropertyBindingError.
 ~QPropertyBindingError ()
 Destroys the QPropertyBindingError.
bool hasError () const
Type type () const
 Returns the type of the QPropertyBindingError.
QString description () const
 Returns a descriptive error message for the QPropertyBindingError if it has been set.

Detailed Description

\inmodule QtCore

Since
6.0

QPropertyBindingError is used by \l{The Property System}{the property system} to report errors that occurred when a binding was evaluated. Use \l type() to query which error occurred, and \l description() to extract an error message which might contain more details. If there is no error, QPropertyBindingError has type QPropertyBindingError::NoError and hasError() returns false.

extern QProperty<int> prop;
QPropertyBindingError error = prop.binding().error();
if (error.hasError())
qDebug() << error.description();
QPropertyBindingError::QPropertyBindingError
QPropertyBindingError()
Default constructs QPropertyBindingError.
Definition qproperty.cpp:931
QProperty
\inmodule QtCore
Definition qproperty.h:352
QProperty::binding
QPropertyBinding< T > binding() const
Returns the binding expression that is associated with this property.
Definition qproperty.h:505
error
DBusConnection const char DBusError * error
Definition qdbus_symbols_p.h:166
qDebug
#define qDebug
Definition qlogging.h:168

Definition at line 131 of file qproperty.h.

Member Enumeration Documentation

◆ Type

enum QPropertyBindingError::Type

This enum specifies which error occurred.

\value NoError No error occurred while evaluating the binding. \value BindingLoop Binding evaluation was stopped because a property depended on its own value. \value EvaluationError Binding evaluation was stopped for any other reason than a binding loop. For example, this value is used in the QML engine when an exception occurs while a binding is evaluated. \value UnknownError A generic error type used when neither of the other values is suitable. Calling \l description() might provide details.

Enumerator
NoError 
BindingLoop 
EvaluationError 
UnknownError 

Definition at line 134 of file qproperty.h.

Constructor & Destructor Documentation

◆ QPropertyBindingError() [1/4]

QPropertyBindingError::QPropertyBindingError ( )

Default constructs QPropertyBindingError.

hasError() will return false, type will return NoError and \l description() will return an empty string.

Definition at line 931 of file qproperty.cpp.

◆ QPropertyBindingError() [2/4]

QPropertyBindingError::QPropertyBindingError ( Type type,
const QString & description = QString() )

Constructs a QPropertyBindingError of type type with description as its description.

Definition at line 939 of file qproperty.cpp.

◆ QPropertyBindingError() [3/4]

QPropertyBindingError::QPropertyBindingError ( const QPropertyBindingError & other)

Copy-constructs QPropertyBindingError from other.

Definition at line 951 of file qproperty.cpp.

◆ QPropertyBindingError() [4/4]

QPropertyBindingError::QPropertyBindingError ( QPropertyBindingError && other)

Move-constructs QPropertyBindingError from other.

other will be left in its default state.

Definition at line 969 of file qproperty.cpp.

◆ ~QPropertyBindingError()

QPropertyBindingError::~QPropertyBindingError ( )

Destroys the QPropertyBindingError.

Definition at line 987 of file qproperty.cpp.

Member Function Documentation

◆ description()

QString QPropertyBindingError::description ( ) const

Returns a descriptive error message for the QPropertyBindingError if it has been set.

Definition at line 1007 of file qproperty.cpp.

◆ hasError()

bool QPropertyBindingError::hasError ( ) const
inline

Definition at line 150 of file qproperty.h.

◆ operator=() [1/2]

QPropertyBindingError & QPropertyBindingError::operator= ( const QPropertyBindingError & other)

Copies other to this QPropertyBindingError.

Definition at line 959 of file qproperty.cpp.

◆ operator=() [2/2]

QPropertyBindingError & QPropertyBindingError::operator= ( QPropertyBindingError && other)

Move-assigns other to this QPropertyBindingError.

other will be left in its default state.

Definition at line 978 of file qproperty.cpp.

◆ type()

QPropertyBindingError::Type QPropertyBindingError::type ( ) const

Returns the type of the QPropertyBindingError.

See also
QPropertyBindingError::Type

Definition at line 996 of file qproperty.cpp.

The documentation for this class was generated from the following files: