Extending Qt Creator Manual | QmlError

Extending Qt Creator Manual 4.10.1

# QmlError Class

The QmlError class encapsulates a QML error. More...

Header: | #include <QmlError>
Since: | Qt 5.0

This class was introduced in Qt 5.0.

- List of all members, including inherited members

## Public Functions

| QmlError(const QmlError &other)
| QmlError()
QmlError & | operator=(const QmlError &other)
int | column() const
QString | description() const
bool | isValid() const
int | line() const
int | messageType() const
QObject * | object() const
void | setColumn(int column)
void | setDescription(const QString &description)
void | setLine(int line)
void | setMessageType(int messageType)
void | setObject(QObject *object)
QString | toString() const
int | url() const

## Related Non-Members

QDebug | operator<<(QDebug debug, const QmlError &error)

## Detailed Description

QmlError includes a textual description of the error, as well as location information (the file, line, and column). The toString() method creates a single-line, human-readable string containing all of this information, for example:

      file:///home/user/test.qml:7:8: Invalid property assignment: double expected

You can use qDebug(), qInfo(), or qWarning() to output errors to the console. This method will attempt to open the file indicated by the error and include additional contextual information.

      file:///home/user/test.qml:7:8: Invalid property assignment: double expected
              y: "hello"
                 ^

Note that the Qt Quick 1 version is named QDeclarativeError

See also QQuickView::errors() and QmlComponent::errors().

## Member Function Documentation

### QmlError::QmlError(const QmlError &other)

Creates a copy of other.

### QmlError::QmlError()

Creates an empty error object.

### QmlError &QmlError::operator=(const QmlError &other)

Assigns other to this error object.

### int QmlError::column() const

Returns the error column number.

See also setColumn().

### QString QmlError::description() const

Returns the error description.

See also setDescription().

### bool QmlError::isValid() const

Returns true if this error is valid, otherwise false.

### int QmlError::line() const

Returns the error line number.

See also setLine().

### int QmlError::messageType() const

Returns the message type.

This function was introduced in Qt 5.9.

See also setMessageType().

### QObject *QmlError::object() const

Returns the nearest object where this error occurred. Exceptions in bound property expressions set this to the object to which the property belongs. It will be 0 for all other exceptions.

See also setObject().

### void QmlError::setColumn(int column)

Sets the error column number.

See also column().

### void QmlError::setDescription(const QString &description)

Sets the error description.

See also description().

### void QmlError::setLine(int line)

Sets the error line number.

See also line().

### void QmlError::setMessageType(int messageType)

Sets the messageType for this message. The message type determines which QDebug handlers are responsible for receiving the message.

This function was introduced in Qt 5.9.

See also messageType().

### void QmlError::setObject(QObject *object)

Sets the nearest object where this error occurred.

See also object().

### QString QmlError::toString() const

Returns the error as a human readable string.

### int QmlError::url() const

Returns the url for the file that caused this error.

## Related Non-Members

### QDebug QmlError::operator<<(QDebug debug, const QmlError &error)

Outputs a human readable version of error to debug.