QPlaceReply Class
The QPlaceReply class manages an operation started by an instance of QPlaceManager and serves as a base class for more specialized replies. More...
| Header: | #include <QPlaceReply> |
| qmake: | QT += location |
| Since: | Qt 5.6 |
| Inherits: | QObject |
| Inherited By: | QPlaceContentReply, QPlaceDetailsReply, QPlaceIdReply, QPlaceMatchReply, QPlaceSearchReply, and QPlaceSearchSuggestionReply |
This class was introduced in Qt 5.6.
Public Types
| enum | Error { NoError, PlaceDoesNotExistError, CategoryDoesNotExistError, CommunicationError, ParseError, …, UnknownError } |
| enum | Type { Reply, DetailsReply, SearchReply, SearchSuggestionReply, ContentReply, …, MatchReply } |
Public Functions
| QPlaceReply(QObject *parent = nullptr) | |
| virtual | ~QPlaceReply() |
| QPlaceReply::Error | error() const |
| QString | errorString() const |
| bool | isFinished() const |
| virtual Type | type() const |
Public Slots
| virtual void | abort() |
Signals
| void | aborted() |
| void | contentUpdated() |
| void | error(QPlaceReply::Error error, const QString &errorString = QString()) |
| void | finished() |
Protected Functions
| void | setError(QPlaceReply::Error error, const QString &errorString) |
| void | setFinished(bool finished) |
Detailed Description
The QPlaceReply and each of its specialized subclasses manage the state and results of their corresponding operations. The QPlaceReply itself is used for operations that have no results, that is, it only necessary to know if the operation succeeded or failed.
The finished() signal can be used to monitor the progress of an operation. Once an operation is complete, the error() and errorString() methods provide information on whether the operation completed successfully. If successful, the reply will contain the results for that operation, that is, each subclass will have appropriate functions to retrieve the results of an operation.
See also QPlaceManager.
Member Type Documentation
enum QPlaceReply::Error
Describes an error which occurred during an operation.
| Constant | Value | Description |
|---|---|---|
QPlaceReply::NoError | 0 | No error has occurred |
QPlaceReply::PlaceDoesNotExistError | 1 | A specified place could not be found |
QPlaceReply::CategoryDoesNotExistError | 2 | A specified category could not be found |
QPlaceReply::CommunicationError | 3 | An error occurred communicating with the service provider. |
QPlaceReply::ParseError | 4 | The response from the service provider or an import file was in an unrecognizable format |
QPlaceReply::PermissionsError | 5 | The operation failed because of insufficient permissions. |
QPlaceReply::UnsupportedError | 6 | The operation was not supported by the service provider. |
QPlaceReply::BadArgumentError | 7 | . A parameter that was provided was invalid. |
QPlaceReply::CancelError | 8 | The operation was canceled. |
QPlaceReply::UnknownError | 9 | An error occurred which does not fit into any of the other categories. |
enum QPlaceReply::Type
Describes the reply's type.
| Constant | Value | Description |
|---|---|---|
QPlaceReply::Reply | 0 | This is a generic reply. |
QPlaceReply::DetailsReply | 1 | This is a reply for the retrieval of place details |
QPlaceReply::SearchReply | 2 | This is a reply for the place search operation. |
QPlaceReply::SearchSuggestionReply | 3 | This is a reply for a search suggestion operation. |
QPlaceReply::ContentReply | 4 | This is a reply for content associated with a place. |
QPlaceReply::IdReply | 5 | This is a reply that returns an identifier of a place or category. Typically used for place or category save and remove operations. |
QPlaceReply::MatchReply | 6 | This is a reply that returns places that match those from another provider. |
Member Function Documentation
QPlaceReply::QPlaceReply(QObject *parent = nullptr)
Constructs a reply object with a given parent.
[virtual slot] void QPlaceReply::abort()
Cancels the operation immediately.
See also aborted().
[signal] void QPlaceReply::aborted()
This signal is emitted when the operation has been cancelled.
This function was introduced in Qt 5.9.
See also abort().
[signal] void QPlaceReply::contentUpdated()
This signal is emitted when this reply has updated content available. Depending on the plugin, this signal may never be emitted or emitted multiple times before QPlaceReply::finished() is emitted, as some backends are able to return the requested content asynchronously and incrementally.
Note: Do not delete or deleteLater this reply object in the slot connected to this signal. Do it only upon QPlaceReply::finished.
[signal] void QPlaceReply::error(QPlaceReply::Error error, const QString &errorString = QString())
This signal is emitted when an error has been detected in the processing of this reply. The finished() signal will probably follow.
The error will be described by the error code error. If errorString is not empty it will contain a textual description of the error meant for developers and not end users.
This signal and QPlaceManager::error() will be emitted at the same time.
Note: Do not delete this reply object in the slot connected to this signal. Use deleteLater() instead.
Note: Signal error is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:
connect(placeReply, QOverload<QPlaceReply::Error, const QString &>::of(&QPlaceReply::error), [=](QPlaceReply::Error error, const QString &errorString){ /* ... */ });
[signal] void QPlaceReply::finished()
This signal is emitted when this reply has finished processing.
If error() equals QPlaceReply::NoError then the processing finished successfully.
This signal and QPlaceManager::finished() will be emitted at the same time.
Note: Do not delete this reply object in the slot connected to this signal. Use deleteLater() instead.
See also setFinished().
[virtual] QPlaceReply::~QPlaceReply()
Destroys the reply object.
QPlaceReply::Error QPlaceReply::error() const
Returns the error code.
See also setError().
QString QPlaceReply::errorString() const
Returns the error string of the reply. The error string is intended to be used by developers only and is not fit to be displayed to an end user.
If no error has occurred, the string is empty.
bool QPlaceReply::isFinished() const
Return true if the reply has completed.
[protected] void QPlaceReply::setError(QPlaceReply::Error error, const QString &errorString)
Sets the error and errorString of the reply. This function does not cause the QPlaceReply::error(QPlaceReply::Error, const QString &errorString) signal to be emitted.
See also error().
[protected] void QPlaceReply::setFinished(bool finished)
Sets the status of whether the reply is finished or not. This function does not cause the finished() signal to be emitted.
See also finished().
[virtual] Type QPlaceReply::type() const
Returns the type of the reply.