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Wt
3.3.8
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A resource that serializes data from a data model. More...
#include <Wt/Ext/DataStore>
Public Member Functions | |
| DataStore (WAbstractItemModel *model, DataLocation dataLocation, WObject *parent=0) | |
| Create a new data store. More... | |
| ~DataStore () | |
| Destructor. | |
| void | addColumn (int columnIndex, const std::string &jsonName) |
| Add a column to the list of columns to be serialized. More... | |
| void | setFilterColumn (int columnIndex) |
| Set the column which is used to handle filter requests. More... | |
 Public Member Functions inherited from Wt::WResource | |
| WResource (WObject *parent=0) | |
| Creates a new resource. | |
| ~WResource () | |
| Destroys the resource. More... | |
| void | suggestFileName (const Wt::WString &name, DispositionType dispositionType=Attachment) |
| Suggests a filename to the user for the data streamed by this resource. More... | |
| const Wt::WString & | suggestedFileName () const |
| Returns the suggested file name. More... | |
| void | setDispositionType (DispositionType cd) |
| Configures the Content-Disposition header. More... | |
| DispositionType | dispositionType () const |
| Returns the currently configured content disposition. More... | |
| void | setChanged () |
| Generates a new URL for this resource and emits the changed signal. More... | |
| void | setInternalPath (const std::string &path) |
| Sets an internal path for this resource. More... | |
| std::string | internalPath () const |
| Returns the internal path. More... | |
| const std::string & | generateUrl () |
| Generates an URL for this resource. More... | |
| const std::string & | url () const |
| Returns the current URL for this resource. More... | |
| Signal & | dataChanged () |
| Signal emitted when the data presented in this resource has changed. More... | |
| void | setUploadProgress (bool enabled) |
| Indicate interest in upload progress. More... | |
| Signal< ::uint64_t,::uint64_t > & | dataReceived () |
| Signal emitted when data has been received for this resource. More... | |
| void | write (std::ostream &out, const Http::ParameterMap ¶meters=Http::ParameterMap(), const Http::UploadedFileMap &files=Http::UploadedFileMap()) |
| Stream the resource to a stream. More... | |
| virtual void | handleAbort (const Http::Request &request) |
| Handles a continued request being aborted. More... | |
| void | haveMoreData () |
| Indicate that more data is available. More... | |
| Public Member Functions inherited from Wt::WObject | |
| WObject (WObject *parent=0) | |
| Create a WObject with a given parent object. More... | |
| virtual | ~WObject () |
| Destructor. More... | |
| virtual const std::string | id () const |
| Returns the (unique) identifier for this object. More... | |
| virtual void | setObjectName (const std::string &name) |
| Sets an object name. More... | |
| virtual std::string | objectName () const |
| Returns the object name. More... | |
| void | resetLearnedSlots () |
| Resets learned stateless slot implementations. More... | |
| template<class T > | |
| void | resetLearnedSlot (void(T::*method)()) |
| Resets a learned stateless slot implementation. More... | |
| template<class T > | |
| WStatelessSlot * | implementStateless (void(T::*method)()) |
| Declares a slot to be stateless and learn client-side behaviour on first invocation. More... | |
| template<class T > | |
| WStatelessSlot * | implementStateless (void(T::*method)(), void(T::*undoMethod)()) |
| Declares a slot to be stateless and learn client-side behaviour in advance. More... | |
| void | isNotStateless () |
| Marks the current function as not stateless. More... | |
| template<class T > | |
| WStatelessSlot * | implementJavaScript (void(T::*method)(), const std::string &jsCode) |
| Provides a JavaScript implementation for a method. More... | |
| void | addChild (WObject *child) |
| Adds a child object. More... | |
| virtual void | removeChild (WObject *child) |
| Removes a child object. More... | |
| const std::vector< WObject * > & | children () const |
| Returns the children. | |
| WObject * | parent () const |
| Returns the parent object. | |
Protected Member Functions | |
| virtual void | handleRequest (const Http::Request &request, Http::Response &response) |
| Handles a request. More... | |
| Protected Member Functions inherited from Wt::WResource | |
| void | beingDeleted () |
| Prepares the resource for deletion. More... | |
| Protected Member Functions inherited from Wt::WObject | |
| virtual WStatelessSlot * | getStateless (Method method) |
| On-demand stateless slot implementation. More... | |
Additional Inherited Members | |
| Public Types inherited from Wt::WResource | |
| Public Types inherited from Wt::WObject | |
| typedef void(WObject::* | Method) () |
| Typedef for a WObject method without arguments. | |
| Static Protected Member Functions inherited from Wt::WObject | |
| static WObject * | sender () |
| Returns the sender of the current slot call. More... | |
A resource that serializes data from a data model.
An instance of this class is used by ComboBox and TableView widgets to serialize data from a WAbstractItemModel. The data store can serialize data both for a ClientSide or ServerSide location of the data. When the location is ServerSide, the model supports transmission of certain data pages, and filtering of the model.
To use the data store, you need to specify which columns from the model need to be serialized.
| Wt::Ext::DataStore::DataStore | ( | WAbstractItemModel * | model, |
| DataLocation | dataLocation, | ||
| WObject * | parent = 0 |
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| ) |
Create a new data store.
Data will be fecthed from model.
| void Wt::Ext::DataStore::addColumn | ( | int | columnIndex, |
| const std::string & | jsonName | ||
| ) |
Add a column to the list of columns to be serialized.
The column columnIndex of the model is added to the current list of columns that are serialized. The jsonName provides the column label that is transmitted.
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protectedvirtual |
Handles a request.
Reimplement this method so that a proper response is generated for the given request. From the request object you can access request parameters and whether the request is a continuation request. In the response object, you should set the mime type and stream the output data.
A request may also concern a continuation, indicated in Http::Request::continuation(), in which case the next part for a previously created continuation should be served.
While handling a request, which may happen at any time together with event handling, the library makes sure that the resource is not being concurrently deleted, but multiple requests may happend simultaneously for a single resource.
Implements Wt::WResource.
| void Wt::Ext::DataStore::setFilterColumn | ( | int | columnIndex | ) |
Set the column which is used to handle filter requests.
A request for filtering data will be done by matching the given filter against data in the model at column columnIndex.
1.8.11
