/////////////////////////////////////////////////////////////////////////////
// Name: event.h
-// Purpose: interface of wxEventHandler, wxEventBlocker and many
+// Purpose: interface of wxEvtHandler, wxEventBlocker and many
// wxEvent-derived classes
// Author: wxWidgets team
// RCS-ID: $Id$
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
+/**
+ The predefined constants for the number of times we propagate event
+ upwards window child-parent chain.
+*/
+enum wxEventPropagation
+{
+ /// don't propagate it at all
+ wxEVENT_PROPAGATE_NONE = 0,
+ /// propagate it until it is processed
+ wxEVENT_PROPAGATE_MAX = INT_MAX
+};
+
+/**
+ The different categories for a wxEvent; see wxEvent::GetEventCategory.
+
+ @note They are used as OR-combinable flags by wxEventLoopBase::YieldFor.
+*/
+enum wxEventCategory
+{
+ /**
+ This is the category for those events which are generated to update
+ the appearance of the GUI but which (usually) do not comport data
+ processing, i.e. which do not provide input or output data
+ (e.g. size events, scroll events, etc).
+ They are events NOT directly generated by the user's input devices.
+ */
+ wxEVT_CATEGORY_UI = 1,
+
+ /**
+ This category groups those events which are generated directly from the
+ user through input devices like mouse and keyboard and usually result in
+ data to be processed from the application
+ (e.g. mouse clicks, key presses, etc).
+ */
+ wxEVT_CATEGORY_USER_INPUT = 2,
+
+ /// This category is for wxSocketEvent
+ wxEVT_CATEGORY_SOCKET = 4,
+
+ /// This category is for wxTimerEvent
+ wxEVT_CATEGORY_TIMER = 8,
+
+ /**
+ This category is for any event used to send notifications from the
+ secondary threads to the main one or in general for notifications among
+ different threads (which may or may not be user-generated).
+ See e.g. wxThreadEvent.
+ */
+ wxEVT_CATEGORY_THREAD = 16,
+
+ /**
+ This mask is used in wxEventLoopBase::YieldFor to specify that all event
+ categories should be processed.
+ */
+ wxEVT_CATEGORY_ALL =
+ wxEVT_CATEGORY_UI|wxEVT_CATEGORY_USER_INPUT|wxEVT_CATEGORY_SOCKET| \
+ wxEVT_CATEGORY_TIMER|wxEVT_CATEGORY_THREAD
+};
/**
@class wxEvent
- @wxheader{event.h}
An event is a structure holding information about an event passed to a
callback or member function.
wxEvent used to be a multipurpose event object, and is an abstract base class
for other event classes (see below).
- For more information about events, see the @ref overview_eventhandling overview.
+ For more information about events, see the @ref overview_events overview.
@beginWxPerlOnly
In wxPerl custom event classes should be derived from
{
public:
/**
- Constructor. Should not need to be used directly by an application.
+ Constructor.
+
+ Notice that events are usually created by wxWidgets itself and creating
+ e.g. a wxPaintEvent in your code and sending it to e.g. a wxTextCtrl
+ will not usually affect it at all as native controls have no specific
+ knowledge about wxWidgets events. However you may construct objects of
+ specific types and pass them to wxEvtHandler::ProcessEvent() if you
+ want to create your own custom control and want to process its events
+ in the same manner as the standard ones.
+
+ Also please notice that the order of parameters in this constructor is
+ different from almost all the derived classes which specify the event
+ type as the first argument.
+
+ @param id
+ The identifier of the object (window, timer, ...) which generated
+ this event.
+ @param eventType
+ The unique type of event, e.g. wxEVT_PAINT, wxEVT_SIZE or
+ wxEVT_COMMAND_BUTTON_CLICKED.
*/
wxEvent(int id = 0, wxEventType eventType = wxEVT_NULL);
Returns a copy of the event.
Any event that is posted to the wxWidgets event system for later action
- (via wxEvtHandler::AddPendingEvent or wxPostEvent()) must implement
- this method.
+ (via wxEvtHandler::AddPendingEvent, wxEvtHandler::QueueEvent or wxPostEvent())
+ must implement this method.
All wxWidgets events fully implement this method, but any derived events
implemented by the user should also implement this method just in case they
*/
wxEventType GetEventType() const;
+ /**
+ Returns a generic category for this event.
+ wxEvent implementation returns @c wxEVT_CATEGORY_UI by default.
+
+ This function is used to selectively process events in wxEventLoopBase::YieldFor.
+ */
+ virtual wxEventCategory GetEventCategory() const;
+
/**
Returns the identifier associated with this event, such as a button command id.
*/
Gets the timestamp for the event. The timestamp is the time in milliseconds
since some fixed moment (not necessarily the standard Unix Epoch, so only
differences between the timestamps and not their absolute values usually make sense).
+
+ @warning
+ wxWidgets returns a non-NULL timestamp only for mouse and key events
+ (see wxMouseEvent and wxKeyEvent).
*/
long GetTimestamp() const;
/**
Sets the timestamp for the event.
*/
- void SetTimestamp(long = 0);
+ void SetTimestamp(long timeStamp = 0);
/**
Test if this event should be propagated or not, i.e. if the propagation level
/**
@class wxEventBlocker
- @wxheader{event.h}
This class is a special event handler which allows to discard
any event (or a set of event types) directed to a specific window.
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling, wxEvtHandler
+ @see @ref overview_events_processing, wxEvtHandler
*/
class wxEventBlocker : public wxEvtHandler
{
Note that the @a win window @b must remain alive until the
wxEventBlocker object destruction.
*/
- wxEventBlocker(wxWindow* win, wxEventType = wxEVT_ANY);
+ wxEventBlocker(wxWindow* win, wxEventType type = -1);
/**
Destructor. The blocker will remove itself from the chain of event handlers for
/**
@class wxEvtHandler
- @wxheader{event.h}
A class that can handle events from the windowing system.
- wxWindow (and therefore all window classes) are derived from this class.
+ wxWindow is (and therefore all window classes are) derived from this class.
When events are received, wxEvtHandler invokes the method listed in the
- event table using itself as the object. When using multiple inheritance
- it is imperative that the wxEvtHandler(-derived) class be the first
- class inherited such that the "this" pointer for the overall object
- will be identical to the "this" pointer for the wxEvtHandler portion.
+ event table using itself as the object. When using multiple inheritance
+ <b>it is imperative that the wxEvtHandler(-derived) class is the first
+ class inherited</b> such that the @c this pointer for the overall object
+ will be identical to the @c this pointer of the wxEvtHandler portion.
@library{wxbase}
@category{events}
- @see @ref overview_eventhandling
+ @see @ref overview_events_processing, wxEventBlocker, wxEventLoopBase
*/
-class wxEvtHandler : public wxObject
+class wxEvtHandler : public wxObject, public wxTrackable
{
public:
/**
/**
Destructor.
- If the handler is part of a chain, the destructor will unlink itself and
- restore the previous and next handlers so that they point to each other.
+ If the handler is part of a chain, the destructor will unlink itself
+ (see Unlink()).
*/
virtual ~wxEvtHandler();
+
+ /**
+ @name Event queuing and processing
+ */
+ //@{
+
/**
Queue event for a later processing.
fields of this object are used by it, notably any wxString members of
the event object must not be shallow copies of another wxString object
as this would result in them still using the same string buffer behind
- the scenes. For example
+ the scenes. For example:
@code
void FunctionInAWorkerThread(const wxString& str)
{
}
@endcode
+ Note that you can use wxThreadEvent instead of wxCommandEvent
+ to avoid this problem:
+ @code
+ void FunctionInAWorkerThread(const wxString& str)
+ {
+ wxThreadEvent evt;
+ evt->SetString(str);
+
+ // wxThreadEvent::Clone() makes sure that the internal wxString
+ // member is not shared by other wxString instances:
+ wxTheApp->QueueEvent( evt.Clone() );
+ }
+ @endcode
+
Finally notice that this method automatically wakes up the event loop
if it is currently idle by calling ::wxWakeUpIdle() so there is no need
to do it manually when using it.
wxString object which happens because the wxString field in the
original @a event object and its copy made internally by this function
share the same string buffer internally. Use QueueEvent() to avoid
- this.
+ this.
- A copy of event is made by the function, so the original can be deleted
+ A copy of @a event is made by the function, so the original can be deleted
as soon as function returns (it is common that the original is created
on the stack). This requires that the wxEvent::Clone() method be
implemented by event so that it can be duplicated and stored until it
virtual void AddPendingEvent(const wxEvent& event);
/**
- Connects the given function dynamically with the event handler, id and event type.
- This is an alternative to the use of static event tables.
+ Processes an event, searching event tables and calling zero or more suitable
+ event handler function(s).
+
+ Normally, your application would not call this function: it is called in the
+ wxWidgets implementation to dispatch incoming user interface events to the
+ framework (and application).
+
+ However, you might need to call it if implementing new functionality
+ (such as a new control) where you define new event types, as opposed to
+ allowing the user to override virtual functions.
- See the @ref page_samples_event sample for usage.
+ Notice that you don't usually need to override ProcessEvent() to
+ customize the event handling, overriding the specially provided
+ TryBefore() and TryAfter() functions is usually enough. For example,
+ wxMDIParentFrame may override TryBefore() to ensure that the menu
+ events are processed in the active child frame before being processed
+ in the parent frame itself.
+
+ The normal order of event table searching is as follows:
+ -# wxApp::FilterEvent() is called. If it returns anything but @c -1
+ (default) the processing stops here.
+ -# If the object is disabled (via a call to wxEvtHandler::SetEvtHandlerEnabled)
+ the function skips to step (7).
+ -# TryBefore() is called (this is where wxValidator are taken into
+ account for wxWindow objects). If this returns @true, the function exits.
+ -# Dynamic event table of the handlers binded using Bind<>() is
+ searched. If a handler is found, it is executed and the function
+ returns @true unless the handler used wxEvent::Skip() to indicate
+ that it didn't handle the event in which case the search continues.
+ -# Static events table of the handlers binded using event table
+ macros is searched for this event handler. If this fails, the base
+ class event table table is tried, and so on until no more tables
+ exist or an appropriate function was found. If a handler is found,
+ the same logic as in the previous step applies.
+ -# The search is applied down the entire chain of event handlers (usually the
+ chain has a length of one). This chain can be formed using wxEvtHandler::SetNextHandler():
+ @image html overview_events_chain.png
+ (referring to the image, if @c A->ProcessEvent is called and it doesn't handle
+ the event, @c B->ProcessEvent will be called and so on...).
+ Note that in the case of wxWindow you can build a stack of event handlers
+ (see wxWindow::PushEventHandler() for more info).
+ If any of the handlers of the chain return @true, the function exits.
+ -# TryAfter() is called: for the wxWindow object this may propagate the
+ event to the window parent (recursively). If the event is still not
+ processed, ProcessEvent() on wxTheApp object is called as the last
+ step.
+
+ Notice that steps (2)-(6) are performed in ProcessEventHere() which is
+ called by this function.
+
+ @param event
+ Event to process.
+ @return
+ @true if a suitable event handler function was found and executed,
+ and the function did not call wxEvent::Skip.
+
+ @see SearchEventTable()
+ */
+ virtual bool ProcessEvent(wxEvent& event);
+
+ /**
+ Try to process the event in this event handler.
+
+ This method is called from ProcessEvent(), please see the detailed
+ description of the event processing logic there.
+
+ It is @em not virtual and so may not be overridden but it does call
+ virtual TryBefore() which may be overridden.
+
+ @param event
+ Event to process.
+ @return
+ @true if this object itself defines a handler for this event and
+ the handler didn't skip the event.
+ */
+ bool ProcessEventHere(wxEvent& event);
+
+ /**
+ Processes an event by calling ProcessEvent() and handles any exceptions
+ that occur in the process.
+ If an exception is thrown in event handler, wxApp::OnExceptionInMainLoop is called.
+
+ @param event
+ Event to process.
+
+ @return @true if the event was processed, @false if no handler was found
+ or an exception was thrown.
+
+ @see wxWindow::HandleWindowEvent
+ */
+ bool SafelyProcessEvent(wxEvent& event);
+
+ /**
+ Processes the pending events previously queued using QueueEvent() or
+ AddPendingEvent(); you must call this function only if you are sure
+ there are pending events for this handler, otherwise a @c wxCHECK
+ will fail.
+
+ The real processing still happens in ProcessEvent() which is called by this
+ function.
+
+ Note that this function needs a valid application object (see
+ wxAppConsole::GetInstance()) because wxApp holds the list of the event
+ handlers with pending events and this function manipulates that list.
+ */
+ void ProcessPendingEvents();
+
+ /**
+ Deletes all events queued on this event handler using QueueEvent() or
+ AddPendingEvent().
+
+ Use with care because the events which are deleted are (obviously) not
+ processed and this may have unwanted consequences (e.g. user actions events
+ will be lost).
+ */
+ void DeletePendingEvents();
+
+ /**
+ Searches the event table, executing an event handler function if an appropriate
+ one is found.
+
+ @param table
+ Event table to be searched.
+ @param event
+ Event to be matched against an event table entry.
+
+ @return @true if a suitable event handler function was found and
+ executed, and the function did not call wxEvent::Skip.
+
+ @remarks This function looks through the object's event table and tries
+ to find an entry that will match the event.
+ An entry will match if:
+ @li The event type matches, and
+ @li the identifier or identifier range matches, or the event table
+ entry's identifier is zero.
+
+ If a suitable function is called but calls wxEvent::Skip, this
+ function will fail, and searching will continue.
+
+ @todo this function in the header is listed as an "implementation only" function;
+ are we sure we want to document it?
+
+ @see ProcessEvent()
+ */
+ virtual bool SearchEventTable(wxEventTable& table,
+ wxEvent& event);
+
+ //@}
+
+
+ /**
+ @name Connecting and disconnecting
+ */
+ //@{
+
+ /**
+ Connects the given function dynamically with the event handler, id and
+ event type.
+
+ Notice that Bind() provides a more flexible and safer way to do the
+ same thing as Connect(), please use it in any new code -- while
+ Connect() is not formally deprecated due to its existing widespread
+ usage, it has no advantages compared to Bind().
+
+ This is an alternative to the use of static event tables. It is more
+ flexible as it allows to connect events generated by some object to an
+ event handler defined in a different object of a different class (which
+ is impossible to do directly with the event tables -- the events can be
+ only handled in another object if they are propagated upwards to it).
+ Do make sure to specify the correct @a eventSink when connecting to an
+ event of a different object.
+
+ See @ref overview_events_bind for more detailed explanation
+ of this function and the @ref page_samples_event sample for usage
+ examples.
This specific overload allows you to connect an event handler to a @e range
of @e source IDs.
@param userData
Data to be associated with the event table entry.
@param eventSink
- Object whose member function should be called.
- If this is @NULL, @c *this will be used.
+ Object whose member function should be called. It must be specified
+ when connecting an event generated by one object to a member
+ function of a different object. If it is omitted, @c this is used.
+
+ @see Bind<>()
*/
void Connect(int id, int lastId, wxEventType eventType,
wxObjectEventFunction function,
@param eventSink
Object whose member function should be called.
*/
- bool Disconnect(wxEventType eventType = wxEVT_NULL,
- wxObjectEventFunction function = NULL,
+ bool Disconnect(wxEventType eventType,
+ wxObjectEventFunction function,
wxObject* userData = NULL,
wxEvtHandler* eventSink = NULL);
This overload takes an additional range of source IDs.
*/
- bool Disconnect(int id, int lastId = wxID_ANY,
- wxEventType eventType = wxEVT_NULL,
+ bool Disconnect(int id, int lastId,
+ wxEventType eventType,
wxObjectEventFunction function = NULL,
wxObject* userData = NULL,
wxEvtHandler* eventSink = NULL);
+ //@}
- /**
- Returns user-supplied client data.
- @remarks Normally, any extra data the programmer wishes to associate with
- the object should be made available by deriving a new class with
- new data members.
-
- @see SetClientData()
+ /**
+ @name Binding and Unbinding
*/
- void* GetClientData() const;
+ //@{
/**
- Returns a pointer to the user-supplied client data object.
+ Binds the given function, functor or method dynamically with the event.
- @see SetClientObject(), wxClientData
- */
- wxClientData* GetClientObject() const;
+ This offers basically the same functionality as Connect(), but it is
+ more flexible as it also allows you to use ordinary functions and
+ arbitrary functors as event handlers. It is also less restrictive then
+ Connect() because you can use an arbitrary method as an event handler,
+ where as Connect() requires a wxEvtHandler derived handler.
- /**
- Returns @true if the event handler is enabled, @false otherwise.
+ See @ref overview_events_bind for more detailed explanation
+ of this function and the @ref page_samples_event sample for usage
+ examples.
- @see SetEvtHandlerEnabled()
+ @param eventType
+ The event type to be associated with this event handler.
+ @param functor
+ The event handler functor. This can be an ordinary function but also
+ an arbitrary functor like boost::function<>.
+ @param id
+ The first ID of the identifier range to be associated with the event
+ handler.
+ @param lastId
+ The last ID of the identifier range to be associated with the event
+ handler.
+ @param userData
+ Data to be associated with the event table entry.
+
+ @since 2.9.0
*/
- bool GetEvtHandlerEnabled() const;
+ template <typename EventTag, typename Functor>
+ void Bind(const EventTag& eventType,
+ Functor functor,
+ int id = wxID_ANY,
+ int lastId = wxID_ANY,
+ wxObject *userData = NULL);
/**
- Returns the pointer to the next handler in the chain.
+ See the Bind<>(const EventTag&, Functor, int, int, wxObject*) overload for
+ more info.
- @see SetNextHandler(), GetPreviousHandler(), SetPreviousHandler(),
- wxWindow::PushEventHandler, wxWindow::PopEventHandler
- */
- wxEvtHandler* GetNextHandler() const;
+ This overload will bind the given method as the event handler.
+ @param eventType
+ The event type to be associated with this event handler.
+ @param method
+ The event handler method. This can be an arbitrary method (doesn't need
+ to be from a wxEvtHandler derived class).
+ @param handler
+ Object whose method should be called. It must always be specified
+ so it can be checked at compile time whether the given method is an
+ actual member of the given handler.
+ @param id
+ The first ID of the identifier range to be associated with the event
+ handler.
+ @param lastId
+ The last ID of the identifier range to be associated with the event
+ handler.
+ @param userData
+ Data to be associated with the event table entry.
+
+ @since 2.9.0
+ */
+ template <typename EventTag, typename Class, typename EventArg, typename EventHandler>
+ void Bind(const EventTag &eventType,
+ void (Class::*method)(EventArg &),
+ EventHandler *handler,
+ int id = wxID_ANY,
+ int lastId = wxID_ANY,
+ wxObject *userData = NULL);
/**
- Returns the pointer to the previous handler in the chain.
+ Unbinds the given function, functor or method dynamically from the
+ event handler, using the specified parameters as search criteria and
+ returning @true if a matching function has been found and removed.
- @see SetPreviousHandler(), GetNextHandler(), SetNextHandler(),
- wxWindow::PushEventHandler, wxWindow::PopEventHandler
+ This method can only unbind functions, functors or methods which have
+ been added using the Bind<>() method. There is no way to unbind
+ functions binded using the (static) event tables.
+
+ @param eventType
+ The event type associated with this event handler.
+ @param functor
+ The event handler functor. This can be an ordinary function but also
+ an arbitrary functor like boost::function<>.
+ @param id
+ The first ID of the identifier range associated with the event
+ handler.
+ @param lastId
+ The last ID of the identifier range associated with the event
+ handler.
+ @param userData
+ Data associated with the event table entry.
+
+ @since 2.9.0
*/
- wxEvtHandler* GetPreviousHandler() const;
+ template <typename EventTag, typename Functor>
+ bool Unbind(const EventTag& eventType,
+ Functor functor,
+ int id = wxID_ANY,
+ int lastId = wxID_ANY,
+ wxObject *userData = NULL);
/**
- Processes an event, searching event tables and calling zero or more suitable
- event handler function(s).
+ See the Unbind<>(const EventTag&, Functor, int, int, wxObject*)
+ overload for more info.
- Normally, your application would not call this function: it is called in the
- wxWidgets implementation to dispatch incoming user interface events to the
- framework (and application).
+ This overload unbinds the given method from the event..
- However, you might need to call it if implementing new functionality
- (such as a new control) where you define new event types, as opposed to
- allowing the user to override virtual functions.
+ @param eventType
+ The event type associated with this event handler.
+ @param method
+ The event handler method associated with this event.
+ @param handler
+ Object whose method was called.
+ @param id
+ The first ID of the identifier range associated with the event
+ handler.
+ @param lastId
+ The last ID of the identifier range associated with the event
+ handler.
+ @param userData
+ Data associated with the event table entry.
+
+ @since 2.9.0
+ */
+ template <typename EventTag, typename Class, typename EventArg, typename EventHandler>
+ bool Unbind(const EventTag &eventType,
+ void (Class::*method)(EventArg&),
+ EventHandler *handler,
+ int id = wxID_ANY,
+ int lastId = wxID_ANY,
+ wxObject *userData = NULL );
+ //@}
+ /**
+ @name User-supplied data
+ */
+ //@{
- An instance where you might actually override the ProcessEvent function is where
- you want to direct event processing to event handlers not normally noticed by
- wxWidgets. For example, in the document/view architecture, documents and views
- are potential event handlers. When an event reaches a frame, ProcessEvent will
- need to be called on the associated document and view in case event handler functions
- are associated with these objects. The property classes library (wxProperty) also
- overrides ProcessEvent for similar reasons.
+ /**
+ Returns user-supplied client data.
- The normal order of event table searching is as follows:
- -# If the object is disabled (via a call to wxEvtHandler::SetEvtHandlerEnabled)
- the function skips to step (6).
- -# If the object is a wxWindow, ProcessEvent() is recursively called on the
- window's wxValidator. If this returns @true, the function exits.
- -# SearchEventTable() is called for this event handler. If this fails, the base
- class table is tried, and so on until no more tables exist or an appropriate
- function was found, in which case the function exits.
- -# The search is applied down the entire chain of event handlers (usually the
- chain has a length of one). If this succeeds, the function exits.
- -# If the object is a wxWindow and the event is a wxCommandEvent, ProcessEvent()
- is recursively applied to the parent window's event handler.
- If this returns true, the function exits.
- -# Finally, ProcessEvent() is called on the wxApp object.
+ @remarks Normally, any extra data the programmer wishes to associate with
+ the object should be made available by deriving a new class with
+ new data members.
- @param event
- Event to process.
+ @see SetClientData()
+ */
+ void* GetClientData() const;
- @return @true if a suitable event handler function was found and
- executed, and the function did not call wxEvent::Skip.
+ /**
+ Returns a pointer to the user-supplied client data object.
- @see SearchEventTable()
+ @see SetClientObject(), wxClientData
*/
- virtual bool ProcessEvent(wxEvent& event);
+ wxClientData* GetClientObject() const;
/**
- Processes an event by calling ProcessEvent() and handles any exceptions
- that occur in the process.
- If an exception is thrown in event handler, wxApp::OnExceptionInMainLoop is called.
+ Sets user-supplied client data.
- @param event
- Event to process.
+ @param data
+ Data to be associated with the event handler.
- @return @true if the event was processed, @false if no handler was found
- or an exception was thrown.
+ @remarks Normally, any extra data the programmer wishes to associate
+ with the object should be made available by deriving a new
+ class with new data members. You must not call this method
+ and SetClientObject on the same class - only one of them.
- @see wxWindow::HandleWindowEvent
+ @see GetClientData()
*/
- bool SafelyProcessEvent(wxEvent& event);
+ void SetClientData(void* data);
/**
- Searches the event table, executing an event handler function if an appropriate
- one is found.
+ Set the client data object. Any previous object will be deleted.
- @param table
- Event table to be searched.
- @param event
- Event to be matched against an event table entry.
+ @see GetClientObject(), wxClientData
+ */
+ void SetClientObject(wxClientData* data);
- @return @true if a suitable event handler function was found and
- executed, and the function did not call wxEvent::Skip.
+ //@}
- @remarks This function looks through the object's event table and tries
- to find an entry that will match the event.
- An entry will match if:
- @li The event type matches, and
- @li the identifier or identifier range matches, or the event table
- entry's identifier is zero.
- If a suitable function is called but calls wxEvent::Skip, this
- function will fail, and searching will continue.
- @see ProcessEvent()
+ /**
+ @name Event handler chaining
+
+ wxEvtHandler can be arranged in a double-linked list of handlers
+ which is automatically iterated by ProcessEvent() if needed.
*/
- virtual bool SearchEventTable(wxEventTable& table,
- wxEvent& event);
+ //@{
/**
- Sets user-supplied client data.
+ Returns @true if the event handler is enabled, @false otherwise.
- @param data
- Data to be associated with the event handler.
+ @see SetEvtHandlerEnabled()
+ */
+ bool GetEvtHandlerEnabled() const;
- @remarks Normally, any extra data the programmer wishes to associate
- with the object should be made available by deriving a new
- class with new data members. You must not call this method
- and SetClientObject on the same class - only one of them.
+ /**
+ Returns the pointer to the next handler in the chain.
- @see GetClientData()
+ @see SetNextHandler(), GetPreviousHandler(), SetPreviousHandler(),
+ wxWindow::PushEventHandler, wxWindow::PopEventHandler
*/
- void SetClientData(void* data);
+ wxEvtHandler* GetNextHandler() const;
/**
- Set the client data object. Any previous object will be deleted.
+ Returns the pointer to the previous handler in the chain.
- @see GetClientObject(), wxClientData
+ @see SetPreviousHandler(), GetNextHandler(), SetNextHandler(),
+ wxWindow::PushEventHandler, wxWindow::PopEventHandler
*/
- void SetClientObject(wxClientData* data);
+ wxEvtHandler* GetPreviousHandler() const;
/**
Enables or disables the event handler.
/**
Sets the pointer to the next handler.
+ @remarks
+ See ProcessEvent() for more info about how the chains of event handlers
+ are internally used.
+ Also remember that wxEvtHandler uses double-linked lists and thus if you
+ use this function, you should also call SetPreviousHandler() on the
+ argument passed to this function:
+ @code
+ handlerA->SetNextHandler(handlerB);
+ handlerB->SetPreviousHandler(handlerA);
+ @endcode
+
@param handler
- Event handler to be set as the next handler.
+ The event handler to be set as the next handler.
+ Cannot be @NULL.
- @see GetNextHandler(), SetPreviousHandler(), GetPreviousHandler(),
- wxWindow::PushEventHandler, wxWindow::PopEventHandler
+ @see @ref overview_events_processing
*/
- void SetNextHandler(wxEvtHandler* handler);
+ virtual void SetNextHandler(wxEvtHandler* handler);
/**
Sets the pointer to the previous handler.
+ All remarks about SetNextHandler() apply to this function as well.
@param handler
- Event handler to be set as the previous handler.
+ The event handler to be set as the previous handler.
+ Cannot be @NULL.
+
+ @see @ref overview_events_processing
+ */
+ virtual void SetPreviousHandler(wxEvtHandler* handler);
+
+ /**
+ Unlinks this event handler from the chain it's part of (if any);
+ then links the "previous" event handler to the "next" one
+ (so that the chain won't be interrupted).
+
+ E.g. if before calling Unlink() you have the following chain:
+ @image html evthandler_unlink_before.png
+ then after calling @c B->Unlink() you'll have:
+ @image html evthandler_unlink_after.png
+
+ @since 2.9.0
+ */
+ void Unlink();
+
+ /**
+ Returns @true if the next and the previous handler pointers of this
+ event handler instance are @NULL.
+
+ @since 2.9.0
+
+ @see SetPreviousHandler(), SetNextHandler()
*/
- void SetPreviousHandler(wxEvtHandler* handler);
+ bool IsUnlinked() const;
+
+ //@}
+
+protected:
+ /**
+ Method called by ProcessEvent() before examining this object event
+ tables.
+
+ This method can be overridden to hook into the event processing logic
+ as early as possible. You should usually call the base class version
+ when overriding this method, even if wxEvtHandler itself does nothing
+ here, some derived classes do use this method, e.g. wxWindow implements
+ support for wxValidator in it.
+
+ Example:
+ @code
+ class MyClass : public BaseClass // inheriting from wxEvtHandler
+ {
+ ...
+ protected:
+ virtual bool TryBefore(wxEvent& event)
+ {
+ if ( MyPreProcess(event) )
+ return true;
+
+ return BaseClass::TryBefore(event);
+ }
+ };
+ @endcode
+
+ @see ProcessEvent(), ProcessEventHere()
+ */
+ virtual bool TryBefore(wxEvent& event);
+
+ /**
+ Method called by ProcessEvent() as last resort.
+
+ This method can be overridden to implement post-processing for the
+ events which were not processed anywhere else.
+
+ The base class version handles forwarding the unprocessed events to
+ wxApp at wxEvtHandler level and propagating them upwards the window
+ child-parent chain at wxWindow level and so should usually be called
+ when overriding this method:
+ @code
+ class MyClass : public BaseClass // inheriting from wxEvtHandler
+ {
+ ...
+ protected:
+ virtual bool TryAfter(wxEvent& event)
+ {
+ if ( BaseClass::TryAfter(event) )
+ return true;
+
+ return MyPostProcess(event);
+ }
+ };
+ @endcode
+
+ @see ProcessEvent(), ProcessEventHere()
+ */
+ virtual bool TryAfter(wxEvent& event);
};
/**
@class wxKeyEvent
- @wxheader{event.h}
This event class contains information about keypress (character) events.
Both key events provide untranslated key codes while the char event carries
the translated one. The untranslated code for alphanumeric keys is always
an upper case value. For the other keys it is one of @c WXK_XXX values
- from the @ref page_keycodes.
+ from the ::wxKeyCode enumeration.
The translated key is, in general, the character the user expects to appear
as the result of the key combination when typing the text into a text entry
zone, for example.
@beginEventTable{wxKeyEvent}
@event{EVT_KEY_DOWN(func)}
- Process a wxEVT_KEY_DOWN event (any key has been pressed).
+ Process a @c wxEVT_KEY_DOWN event (any key has been pressed).
@event{EVT_KEY_UP(func)}
- Process a wxEVT_KEY_UP event (any key has been released).
+ Process a @c wxEVT_KEY_UP event (any key has been released).
@event{EVT_CHAR(func)}
- Process a wxEVT_CHAR event.
+ Process a @c wxEVT_CHAR event.
@endEventTable
+ @see wxKeyboardState
+
@library{wxcore}
@category{events}
*/
-class wxKeyEvent : public wxEvent
+class wxKeyEvent : public wxEvent,
+ public wxKeyboardState
{
public:
/**
*/
wxKeyEvent(wxEventType keyEventType = wxEVT_NULL);
- /**
- Returns @true if the Alt key was down at the time of the key event.
-
- Notice that GetModifiers() is easier to use correctly than this function
- so you should consider using it in new code.
- */
- bool AltDown() const;
-
- /**
- CMD is a pseudo key which is the same as Control for PC and Unix
- platforms but the special APPLE (a.k.a as COMMAND) key under Macs:
- it makes often sense to use it instead of, say, ControlDown() because Cmd
- key is used for the same thing under Mac as Ctrl elsewhere (but Ctrl still
- exists, just not used for this purpose under Mac). So for non-Mac platforms
- this is the same as ControlDown() and under Mac this is the same as MetaDown().
- */
- bool CmdDown() const;
-
- /**
- Returns @true if the control key was down at the time of the key event.
-
- Notice that GetModifiers() is easier to use correctly than this function
- so you should consider using it in new code.
- */
- bool ControlDown() const;
-
/**
Returns the virtual key code. ASCII events return normal ASCII values,
while non-ASCII events return values such as @b WXK_LEFT for the left cursor
- key. See @ref page_keycodes for a full list of the virtual key codes.
+ key. See ::wxKeyCode for a full list of the virtual key codes.
Note that in Unicode build, the returned value is meaningful only if the
user entered a character that can be represented in current locale's default
*/
int GetKeyCode() const;
- /**
- Return the bitmask of modifier keys which were pressed when this event
- happened. See @ref page_keymodifiers for the full list of modifiers.
-
- Notice that this function is easier to use correctly than, for example,
- ControlDown() because when using the latter you also have to remember to
- test that none of the other modifiers is pressed:
-
- @code
- if ( ControlDown() && !AltDown() && !ShiftDown() && !MetaDown() )
- ... handle Ctrl-XXX ...
- @endcode
-
- and forgetting to do it can result in serious program bugs (e.g. program
- not working with European keyboard layout where ALTGR key which is seen by
- the program as combination of CTRL and ALT is used). On the other hand,
- you can simply write:
-
- @code
- if ( GetModifiers() == wxMOD_CONTROL )
- ... handle Ctrl-XXX ...
- @endcode
-
- with this function.
- */
- int GetModifiers() const;
-
//@{
/**
Obtains the position (in client coordinates) at which the key was pressed.
Returns the Y position (in client coordinates) of the event.
*/
wxCoord GetY() const;
-
- /**
- Returns @true if either CTRL or ALT keys was down at the time of the
- key event.
-
- Note that this function does not take into account neither SHIFT nor
- META key states (the reason for ignoring the latter is that it is
- common for NUMLOCK key to be configured as META under X but the key
- presses even while NUMLOCK is on should be still processed normally).
- */
- bool HasModifiers() const;
-
- /**
- Returns @true if the Meta key was down at the time of the key event.
-
- Notice that GetModifiers() is easier to use correctly than this function
- so you should consider using it in new code.
- */
- bool MetaDown() const;
-
- /**
- Returns @true if the shift key was down at the time of the key event.
-
- Notice that GetModifiers() is easier to use correctly than this function
- so you should consider using it in new code.
- */
- bool ShiftDown() const;
};
/**
@class wxJoystickEvent
- @wxheader{event.h}
This event class contains information about joystick events, particularly
events received by windows.
@beginEventTable{wxJoystickEvent}
- @style{EVT_JOY_BUTTON_DOWN(func)}
- Process a wxEVT_JOY_BUTTON_DOWN event.
- @style{EVT_JOY_BUTTON_UP(func)}
- Process a wxEVT_JOY_BUTTON_UP event.
- @style{EVT_JOY_MOVE(func)}
- Process a wxEVT_JOY_MOVE event.
- @style{EVT_JOY_ZMOVE(func)}
- Process a wxEVT_JOY_ZMOVE event.
- @style{EVT_JOYSTICK_EVENTS(func)}
+ @event{EVT_JOY_BUTTON_DOWN(func)}
+ Process a @c wxEVT_JOY_BUTTON_DOWN event.
+ @event{EVT_JOY_BUTTON_UP(func)}
+ Process a @c wxEVT_JOY_BUTTON_UP event.
+ @event{EVT_JOY_MOVE(func)}
+ Process a @c wxEVT_JOY_MOVE event.
+ @event{EVT_JOY_ZMOVE(func)}
+ Process a @c wxEVT_JOY_ZMOVE event.
+ @event{EVT_JOYSTICK_EVENTS(func)}
Processes all joystick events.
@endEventTable
/**
@class wxScrollWinEvent
- @wxheader{event.h}
A scroll event holds information about events sent from scrolling windows.
+ Note that you can use the EVT_SCROLLWIN* macros for intercepting scroll window events
+ from the receiving window.
@beginEventTable{wxScrollWinEvent}
- You can use the EVT_SCROLLWIN* macros for intercepting scroll window events
- from the receiving window.
@event{EVT_SCROLLWIN(func)}
Process all scroll events.
@event{EVT_SCROLLWIN_TOP(func)}
@library{wxcore}
@category{events}
- @see wxScrollEvent, @ref overview_eventhandling
+ @see wxScrollEvent, @ref overview_events
*/
class wxScrollWinEvent : public wxEvent
{
/**
@class wxSysColourChangedEvent
- @wxheader{event.h}
This class is used for system colour change events, which are generated
when the user changes the colour settings using the control panel.
@beginEventTable{wxSysColourChangedEvent}
@event{EVT_SYS_COLOUR_CHANGED(func)}
- Process a wxEVT_SYS_COLOUR_CHANGED event.
+ Process a @c wxEVT_SYS_COLOUR_CHANGED event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling
+ @see @ref overview_events
*/
class wxSysColourChangedEvent : public wxEvent
{
/**
@class wxWindowCreateEvent
- @wxheader{event.h}
This event is sent just after the actual window associated with a wxWindow
object has been created.
@beginEventTable{wxWindowCreateEvent}
@event{EVT_WINDOW_CREATE(func)}
- Process a wxEVT_CREATE event.
+ Process a @c wxEVT_CREATE event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling, wxWindowDestroyEvent
+ @see @ref overview_events, wxWindowDestroyEvent
*/
class wxWindowCreateEvent : public wxCommandEvent
{
Constructor.
*/
wxWindowCreateEvent(wxWindow* win = NULL);
+
+ /// Retutn the window being created.
+ wxWindow *GetWindow() const;
};
/**
@class wxPaintEvent
- @wxheader{event.h}
A paint event is sent when a window's contents needs to be repainted.
@beginEventTable{wxPaintEvent}
@event{EVT_PAINT(func)}
- Process a wxEVT_PAINT event.
+ Process a @c wxEVT_PAINT event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling
+ @see @ref overview_events
*/
class wxPaintEvent : public wxEvent
{
/**
@class wxMaximizeEvent
- @wxheader{event.h}
An event being sent when a top level window is maximized. Notice that it is
not sent when the window is restored to its original size after it had been
@beginEventTable{wxMaximizeEvent}
@event{EVT_MAXIMIZE(func)}
- Process a wxEVT_MAXIMIZE event.
+ Process a @c wxEVT_MAXIMIZE event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling, wxTopLevelWindow::Maximize,
+ @see @ref overview_events, wxTopLevelWindow::Maximize,
wxTopLevelWindow::IsMaximized
*/
class wxMaximizeEvent : public wxEvent
/**
@class wxUpdateUIEvent
- @wxheader{event.h}
This class is used for pseudo-events which are called by wxWidgets
to give an application the chance to update various user interface elements.
@beginEventTable{wxUpdateUIEvent}
@event{EVT_UPDATE_UI(id, func)}
- Process a wxEVT_UPDATE_UI event for the command with the given id.
+ Process a @c wxEVT_UPDATE_UI event for the command with the given id.
@event{EVT_UPDATE_UI_RANGE(id1, id2, func)}
- Process a wxEVT_UPDATE_UI event for any command with id included in the given range.
+ Process a @c wxEVT_UPDATE_UI event for any command with id included in the given range.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling
+ @see @ref overview_events
*/
class wxUpdateUIEvent : public wxCommandEvent
{
/**
@class wxClipboardTextEvent
- @wxheader{event.h}
This class represents the events generated by a control (typically a
wxTextCtrl but other windows can generate these events as well) when its
/**
@class wxMouseEvent
- @wxheader{event.h}
This event class contains information about the events generated by the mouse:
they include mouse buttons press and release events and mouse move events.
parent window receives @c wxEVT_LEAVE_WINDOW event not only when the
mouse leaves the window entirely but also when it enters one of its children.
+ The position associated with a mouse event is expressed in the window
+ coordinates of the window which generated the event, you can use
+ wxWindow::ClientToScreen() to convert it to screen coordinates and possibly
+ call wxWindow::ScreenToClient() next to convert it to window coordinates of
+ another window.
+
@note Note that under Windows CE mouse enter and leave events are not natively
supported by the system but are generated by wxWidgets itself. This has several
drawbacks: the LEAVE_WINDOW event might be received some time after the mouse
@beginEventTable{wxMouseEvent}
@event{EVT_LEFT_DOWN(func)}
- Process a wxEVT_LEFT_DOWN event. The handler of this event should normally
+ Process a @c wxEVT_LEFT_DOWN event. The handler of this event should normally
call event.Skip() to allow the default processing to take place as otherwise
the window under mouse wouldn't get the focus.
@event{EVT_LEFT_UP(func)}
- Process a wxEVT_LEFT_UP event.
+ Process a @c wxEVT_LEFT_UP event.
@event{EVT_LEFT_DCLICK(func)}
- Process a wxEVT_LEFT_DCLICK event.
+ Process a @c wxEVT_LEFT_DCLICK event.
@event{EVT_MIDDLE_DOWN(func)}
- Process a wxEVT_MIDDLE_DOWN event.
+ Process a @c wxEVT_MIDDLE_DOWN event.
@event{EVT_MIDDLE_UP(func)}
- Process a wxEVT_MIDDLE_UP event.
+ Process a @c wxEVT_MIDDLE_UP event.
@event{EVT_MIDDLE_DCLICK(func)}
- Process a wxEVT_MIDDLE_DCLICK event.
+ Process a @c wxEVT_MIDDLE_DCLICK event.
@event{EVT_RIGHT_DOWN(func)}
- Process a wxEVT_RIGHT_DOWN event.
+ Process a @c wxEVT_RIGHT_DOWN event.
@event{EVT_RIGHT_UP(func)}
- Process a wxEVT_RIGHT_UP event.
+ Process a @c wxEVT_RIGHT_UP event.
@event{EVT_RIGHT_DCLICK(func)}
- Process a wxEVT_RIGHT_DCLICK event.
+ Process a @c wxEVT_RIGHT_DCLICK event.
@event{EVT_MOUSE_AUX1_DOWN(func)}
- Process a wxEVT_MOUSE_AUX1_DOWN event.
+ Process a @c wxEVT_MOUSE_AUX1_DOWN event.
@event{EVT_MOUSE_AUX1_UP(func)}
- Process a wxEVT_MOUSE_AUX1_UP event.
+ Process a @c wxEVT_MOUSE_AUX1_UP event.
@event{EVT_MOUSE_AUX1_DCLICK(func)}
- Process a wxEVT_MOUSE_AUX1_DCLICK event.
+ Process a @c wxEVT_MOUSE_AUX1_DCLICK event.
@event{EVT_MOUSE_AUX2_DOWN(func)}
- Process a wxEVT_MOUSE_AUX2_DOWN event.
+ Process a @c wxEVT_MOUSE_AUX2_DOWN event.
@event{EVT_MOUSE_AUX2_UP(func)}
- Process a wxEVT_MOUSE_AUX2_UP event.
+ Process a @c wxEVT_MOUSE_AUX2_UP event.
@event{EVT_MOUSE_AUX2_DCLICK(func)}
- Process a wxEVT_MOUSE_AUX2_DCLICK event.
+ Process a @c wxEVT_MOUSE_AUX2_DCLICK event.
@event{EVT_MOTION(func)}
- Process a wxEVT_MOTION event.
+ Process a @c wxEVT_MOTION event.
@event{EVT_ENTER_WINDOW(func)}
- Process a wxEVT_ENTER_WINDOW event.
+ Process a @c wxEVT_ENTER_WINDOW event.
@event{EVT_LEAVE_WINDOW(func)}
- Process a wxEVT_LEAVE_WINDOW event.
+ Process a @c wxEVT_LEAVE_WINDOW event.
@event{EVT_MOUSEWHEEL(func)}
- Process a wxEVT_MOUSEWHEEL event.
+ Process a @c wxEVT_MOUSEWHEEL event.
@event{EVT_MOUSE_EVENTS(func)}
Process all mouse events.
@endEventTable
@library{wxcore}
@category{events}
- @see wxKeyEvent::CmdDown
+ @see wxKeyEvent
*/
-class wxMouseEvent : public wxEvent
+class wxMouseEvent : public wxEvent,
+ public wxMouseState
{
public:
/**
*/
wxMouseEvent(wxEventType mouseEventType = wxEVT_NULL);
- /**
- Returns @true if the Alt key was down at the time of the event.
- */
- bool AltDown() const;
-
/**
Returns @true if the event was a first extra button double click.
*/
*/
bool ButtonUp(int = wxMOUSE_BTN_ANY) const;
- /**
- Same as MetaDown() under Mac, same as ControlDown() elsewhere.
-
- @see wxKeyEvent::CmdDown
- */
- bool CmdDown() const;
-
- /**
- Returns @true if the control key was down at the time of the event.
- */
- bool ControlDown() const;
-
/**
Returns @true if this was a dragging event (motion while a button is depressed).
*/
int GetWheelRotation() const;
+ /**
+ Gets the axis the wheel operation concerns; @c 0 is the Y axis as on
+ most mouse wheels, @c 1 is the X axis.
+
+ Note that only some models of mouse have horizontal wheel axis.
+ */
+ int GetWheelAxis() const;
+
/**
Returns X coordinate of the physical mouse event position.
*/
Returns @true if the right mouse button changed to up.
*/
bool RightUp() const;
-
- /**
- Returns @true if the shift key was down at the time of the event.
- */
- bool ShiftDown() const;
};
/**
@class wxDropFilesEvent
- @wxheader{event.h}
This class is used for drop files events, that is, when files have been dropped
onto the window. This functionality is currently only available under Windows.
@beginEventTable{wxDropFilesEvent}
@event{EVT_DROP_FILES(func)}
- Process a wxEVT_DROP_FILES event.
+ Process a @c wxEVT_DROP_FILES event.
@endEventTable
@onlyfor{wxmsw}
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling
+ @see @ref overview_events
*/
class wxDropFilesEvent : public wxEvent
{
/**
@class wxCommandEvent
- @wxheader{event.h}
This event class contains information about command events, which originate
from a variety of simple controls.
+ Note that wxCommandEvents and wxCommandEvent-derived event classes by default
+ and unlike other wxEvent-derived classes propagate upward from the source
+ window (the window which emits the event) up to the first parent which processes
+ the event. Be sure to read @ref overview_events_propagation.
+
More complex controls, such as wxTreeCtrl, have separate command event classes.
@beginEventTable{wxCommandEvent}
Process a command for a range of window identifiers, supplying the minimum and
maximum window identifiers, command event identifier, and member function.
@event{EVT_BUTTON(id, func)}
- Process a wxEVT_COMMAND_BUTTON_CLICKED command, which is generated by a wxButton control.
+ Process a @c wxEVT_COMMAND_BUTTON_CLICKED command, which is generated by a wxButton control.
@event{EVT_CHECKBOX(id, func)}
- Process a wxEVT_COMMAND_CHECKBOX_CLICKED command, which is generated by a wxCheckBox control.
+ Process a @c wxEVT_COMMAND_CHECKBOX_CLICKED command, which is generated by a wxCheckBox control.
@event{EVT_CHOICE(id, func)}
- Process a wxEVT_COMMAND_CHOICE_SELECTED command, which is generated by a wxChoice control.
+ Process a @c wxEVT_COMMAND_CHOICE_SELECTED command, which is generated by a wxChoice control.
@event{EVT_COMBOBOX(id, func)}
- Process a wxEVT_COMMAND_COMBOBOX_SELECTED command, which is generated by a wxComboBox control.
+ Process a @c wxEVT_COMMAND_COMBOBOX_SELECTED command, which is generated by a wxComboBox control.
@event{EVT_LISTBOX(id, func)}
- Process a wxEVT_COMMAND_LISTBOX_SELECTED command, which is generated by a wxListBox control.
+ Process a @c wxEVT_COMMAND_LISTBOX_SELECTED command, which is generated by a wxListBox control.
@event{EVT_LISTBOX_DCLICK(id, func)}
- Process a wxEVT_COMMAND_LISTBOX_DOUBLECLICKED command, which is generated by a wxListBox control.
+ Process a @c wxEVT_COMMAND_LISTBOX_DOUBLECLICKED command, which is generated by a wxListBox control.
+ @event{EVT_CHECKLISTBOX(id, func)}
+ Process a @c wxEVT_COMMAND_CHECKLISTBOX_TOGGLED command, which is generated by a wxCheckListBox control.
@event{EVT_MENU(id, func)}
- Process a wxEVT_COMMAND_MENU_SELECTED command, which is generated by a menu item.
+ Process a @c wxEVT_COMMAND_MENU_SELECTED command, which is generated by a menu item.
@event{EVT_MENU_RANGE(id1, id2, func)}
- Process a wxEVT_COMMAND_MENU_RANGE command, which is generated by a range of menu items.
+ Process a @c wxEVT_COMMAND_MENU_RANGE command, which is generated by a range of menu items.
@event{EVT_CONTEXT_MENU(func)}
Process the event generated when the user has requested a popup menu to appear by
pressing a special keyboard key (under Windows) or by right clicking the mouse.
@event{EVT_RADIOBOX(id, func)}
- Process a wxEVT_COMMAND_RADIOBOX_SELECTED command, which is generated by a wxRadioBox control.
+ Process a @c wxEVT_COMMAND_RADIOBOX_SELECTED command, which is generated by a wxRadioBox control.
@event{EVT_RADIOBUTTON(id, func)}
- Process a wxEVT_COMMAND_RADIOBUTTON_SELECTED command, which is generated by a wxRadioButton control.
+ Process a @c wxEVT_COMMAND_RADIOBUTTON_SELECTED command, which is generated by a wxRadioButton control.
@event{EVT_SCROLLBAR(id, func)}
- Process a wxEVT_COMMAND_SCROLLBAR_UPDATED command, which is generated by a wxScrollBar
+ Process a @c wxEVT_COMMAND_SCROLLBAR_UPDATED command, which is generated by a wxScrollBar
control. This is provided for compatibility only; more specific scrollbar event macros
should be used instead (see wxScrollEvent).
@event{EVT_SLIDER(id, func)}
- Process a wxEVT_COMMAND_SLIDER_UPDATED command, which is generated by a wxSlider control.
+ Process a @c wxEVT_COMMAND_SLIDER_UPDATED command, which is generated by a wxSlider control.
@event{EVT_TEXT(id, func)}
- Process a wxEVT_COMMAND_TEXT_UPDATED command, which is generated by a wxTextCtrl control.
+ Process a @c wxEVT_COMMAND_TEXT_UPDATED command, which is generated by a wxTextCtrl control.
@event{EVT_TEXT_ENTER(id, func)}
- Process a wxEVT_COMMAND_TEXT_ENTER command, which is generated by a wxTextCtrl control.
+ Process a @c wxEVT_COMMAND_TEXT_ENTER command, which is generated by a wxTextCtrl control.
Note that you must use wxTE_PROCESS_ENTER flag when creating the control if you want it
to generate such events.
@event{EVT_TEXT_MAXLEN(id, func)}
- Process a wxEVT_COMMAND_TEXT_MAXLEN command, which is generated by a wxTextCtrl control
+ Process a @c wxEVT_COMMAND_TEXT_MAXLEN command, which is generated by a wxTextCtrl control
when the user tries to enter more characters into it than the limit previously set
with SetMaxLength().
@event{EVT_TOGGLEBUTTON(id, func)}
- Process a wxEVT_COMMAND_TOGGLEBUTTON_CLICKED event.
+ Process a @c wxEVT_COMMAND_TOGGLEBUTTON_CLICKED event.
@event{EVT_TOOL(id, func)}
- Process a wxEVT_COMMAND_TOOL_CLICKED event (a synonym for wxEVT_COMMAND_MENU_SELECTED).
+ Process a @c wxEVT_COMMAND_TOOL_CLICKED event (a synonym for @c wxEVT_COMMAND_MENU_SELECTED).
Pass the id of the tool.
@event{EVT_TOOL_RANGE(id1, id2, func)}
- Process a wxEVT_COMMAND_TOOL_CLICKED event for a range of identifiers. Pass the ids of the tools.
+ Process a @c wxEVT_COMMAND_TOOL_CLICKED event for a range of identifiers. Pass the ids of the tools.
@event{EVT_TOOL_RCLICKED(id, func)}
- Process a wxEVT_COMMAND_TOOL_RCLICKED event. Pass the id of the tool.
+ Process a @c wxEVT_COMMAND_TOOL_RCLICKED event. Pass the id of the tool.
@event{EVT_TOOL_RCLICKED_RANGE(id1, id2, func)}
- Process a wxEVT_COMMAND_TOOL_RCLICKED event for a range of ids. Pass the ids of the tools.
+ Process a @c wxEVT_COMMAND_TOOL_RCLICKED event for a range of ids. Pass the ids of the tools.
@event{EVT_TOOL_ENTER(id, func)}
- Process a wxEVT_COMMAND_TOOL_ENTER event. Pass the id of the toolbar itself.
+ Process a @c wxEVT_COMMAND_TOOL_ENTER event. Pass the id of the toolbar itself.
The value of wxCommandEvent::GetSelection() is the tool id, or -1 if the mouse cursor
has moved off a tool.
@event{EVT_COMMAND_LEFT_CLICK(id, func)}
- Process a wxEVT_COMMAND_LEFT_CLICK command, which is generated by a control (Windows 95 and NT only).
+ Process a @c wxEVT_COMMAND_LEFT_CLICK command, which is generated by a control (wxMSW only).
@event{EVT_COMMAND_LEFT_DCLICK(id, func)}
- Process a wxEVT_COMMAND_LEFT_DCLICK command, which is generated by a control (Windows 95 and NT only).
+ Process a @c wxEVT_COMMAND_LEFT_DCLICK command, which is generated by a control (wxMSW only).
@event{EVT_COMMAND_RIGHT_CLICK(id, func)}
- Process a wxEVT_COMMAND_RIGHT_CLICK command, which is generated by a control (Windows 95 and NT only).
+ Process a @c wxEVT_COMMAND_RIGHT_CLICK command, which is generated by a control (wxMSW only).
@event{EVT_COMMAND_SET_FOCUS(id, func)}
- Process a wxEVT_COMMAND_SET_FOCUS command, which is generated by a control (Windows 95 and NT only).
+ Process a @c wxEVT_COMMAND_SET_FOCUS command, which is generated by a control (wxMSW only).
@event{EVT_COMMAND_KILL_FOCUS(id, func)}
- Process a wxEVT_COMMAND_KILL_FOCUS command, which is generated by a control (Windows 95 and NT only).
+ Process a @c wxEVT_COMMAND_KILL_FOCUS command, which is generated by a control (wxMSW only).
@event{EVT_COMMAND_ENTER(id, func)}
- Process a wxEVT_COMMAND_ENTER command, which is generated by a control.
+ Process a @c wxEVT_COMMAND_ENTER command, which is generated by a control.
@endEventTable
@library{wxcore}
/**
Constructor.
*/
- wxCommandEvent(wxEventType commandEventType = 0, int id = 0);
+ wxCommandEvent(wxEventType commandEventType = wxEVT_NULL, int id = 0);
/**
Returns client data pointer for a listbox or choice selection event
/**
@class wxActivateEvent
- @wxheader{event.h}
An activate event is sent when a window or application is being activated
or deactivated.
@beginEventTable{wxActivateEvent}
@event{EVT_ACTIVATE(func)}
- Process a wxEVT_ACTIVATE event.
+ Process a @c wxEVT_ACTIVATE event.
@event{EVT_ACTIVATE_APP(func)}
- Process a wxEVT_ACTIVATE_APP event.
+ Process a @c wxEVT_ACTIVATE_APP event.
+ This event is received by the wxApp-derived instance only.
@event{EVT_HIBERNATE(func)}
Process a hibernate event, supplying the member function. This event applies
to wxApp only, and only on Windows SmartPhone and PocketPC.
a wxEVT_ACTIVATE or wxEVT_ACTIVATE_APP event.
@endEventTable
-
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling, wxApp::IsActive
+ @see @ref overview_events, wxApp::IsActive
*/
class wxActivateEvent : public wxEvent
{
/**
@class wxContextMenuEvent
- @wxheader{event.h}
This class is used for context menu events, sent to give
- the application a chance to show a context (popup) menu.
+ the application a chance to show a context (popup) menu for a wxWindow.
Note that if wxContextMenuEvent::GetPosition returns wxDefaultPosition, this
means that the event originated from a keyboard context button event, and you
@library{wxcore}
@category{events}
- @see wxCommandEvent, @ref overview_eventhandling
+ @see wxCommandEvent, @ref overview_events
*/
class wxContextMenuEvent : public wxCommandEvent
{
/**
@class wxEraseEvent
- @wxheader{event.h}
An erase event is sent when a window's background needs to be repainted.
@beginEventTable{wxEraseEvent}
@event{EVT_ERASE_BACKGROUND(func)}
- Process a wxEVT_ERASE_BACKGROUND event.
+ Process a @c wxEVT_ERASE_BACKGROUND event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling
+ @see @ref overview_events
*/
class wxEraseEvent : public wxEvent
{
/**
@class wxFocusEvent
- @wxheader{event.h}
A focus event is sent when a window's focus changes. The window losing focus
receives a "kill focus" event while the window gaining it gets a "set focus" one.
@beginEventTable{wxFocusEvent}
@event{EVT_SET_FOCUS(func)}
- Process a wxEVT_SET_FOCUS event.
+ Process a @c wxEVT_SET_FOCUS event.
@event{EVT_KILL_FOCUS(func)}
- Process a wxEVT_KILL_FOCUS event.
+ Process a @c wxEVT_KILL_FOCUS event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling
+ @see @ref overview_events
*/
class wxFocusEvent : public wxEvent
{
/**
@class wxChildFocusEvent
- @wxheader{event.h}
A child focus event is sent to a (parent-)window when one of its child windows
gains focus, so that the window could restore the focus back to its corresponding
@beginEventTable{wxChildFocusEvent}
@event{EVT_CHILD_FOCUS(func)}
- Process a wxEVT_CHILD_FOCUS event.
+ Process a @c wxEVT_CHILD_FOCUS event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling
+ @see @ref overview_events
*/
class wxChildFocusEvent : public wxCommandEvent
{
/**
@class wxMouseCaptureLostEvent
- @wxheader{event.h}
An mouse capture lost event is sent to a window that obtained mouse capture,
which was subsequently loss due to "external" event, for example when a dialog
@beginEventTable{wxMouseCaptureLostEvent}
@event{EVT_MOUSE_CAPTURE_LOST(func)}
- Process a wxEVT_MOUSE_CAPTURE_LOST event.
+ Process a @c wxEVT_MOUSE_CAPTURE_LOST event.
@endEventTable
@onlyfor{wxmsw}
@library{wxcore}
@category{events}
- @see wxMouseCaptureChangedEvent, @ref overview_eventhandling,
- wxWindow::CaptureMouse, wxWindow::ReleaseMouse, wxWindow::GetCapture
+ @see wxMouseCaptureChangedEvent, @ref overview_events,
+ wxWindow::CaptureMouse, wxWindow::ReleaseMouse, wxWindow::GetCapture
*/
class wxMouseCaptureLostEvent : public wxEvent
{
/**
@class wxNotifyEvent
- @wxheader{event.h}
This class is not used by the event handlers by itself, but is a base class
- for other event classes (such as wxNotebookEvent).
+ for other event classes (such as wxBookCtrlEvent).
It (or an object of a derived class) is sent when the controls state is being
changed and allows the program to wxNotifyEvent::Veto() this change if it wants
@library{wxcore}
@category{events}
- @see wxNotebookEvent
+ @see wxBookCtrlEvent
*/
class wxNotifyEvent : public wxCommandEvent
{
};
+/**
+ @class wxThreadEvent
+
+ This class adds some simple functionalities to wxCommandEvent coinceived
+ for inter-threads communications.
+ This event is not natively emitted by any control/class: this is just
+ an helper class for the user.
+ Its most important feature is the GetEventCategory() implementation which
+ allows thread events to @b NOT be processed by wxEventLoopBase::YieldFor calls
+ (unless the @c wxEVT_CATEGORY_THREAD is specified - which is never in wx code).
-/**
- Indicates how a wxHelpEvent was generated.
+ @library{wxcore}
+ @category{events,threading}
+
+ @see @ref overview_thread, wxEventLoopBase::YieldFor
*/
-enum wxHelpEventOrigin
+class wxThreadEvent : public wxCommandEvent
{
- wxHE_ORIGIN_UNKNOWN = -1, /**< unrecognized event source. */
- wxHE_ORIGIN_KEYBOARD, /**< event generated from F1 key press. */
+public:
+ /**
+ Constructor.
+ */
+ wxThreadEvent(wxEventType eventType = wxEVT_COMMAND_THREAD, int id = wxID_ANY);
+
+ /**
+ Clones this event making sure that all internal members which use
+ COW (only @c m_commandString for now; see @ref overview_refcount)
+ are unshared (see wxObject::UnShare).
+ */
+ virtual wxEvent *Clone() const;
+
+ /**
+ Returns @c wxEVT_CATEGORY_THREAD.
- /** event generated by wxContextHelp or from the [?] button on
- the title bar (Windows). */
- wxHE_ORIGIN_HELPBUTTON
+ This is important to avoid unwanted processing of thread events
+ when calling wxEventLoopBase::YieldFor().
+ */
+ virtual wxEventCategory GetEventCategory() const;
};
+
/**
@class wxHelpEvent
- @wxheader{event.h}
A help event is sent when the user has requested context-sensitive help.
This can either be caused by the application requesting context-sensitive help mode
@beginEventTable{wxHelpEvent}
@event{EVT_HELP(id, func)}
- Process a wxEVT_HELP event.
+ Process a @c wxEVT_HELP event.
@event{EVT_HELP_RANGE(id1, id2, func)}
- Process a wxEVT_HELP event for a range of ids.
+ Process a @c wxEVT_HELP event for a range of ids.
@endEventTable
@library{wxcore}
@category{events}
- @see wxContextHelp, wxDialog, @ref overview_eventhandling
+ @see wxContextHelp, wxDialog, @ref overview_events
*/
class wxHelpEvent : public wxCommandEvent
{
public:
+ /**
+ Indicates how a wxHelpEvent was generated.
+ */
+ enum Origin
+ {
+ Origin_Unknown, /**< unrecognized event source. */
+ Origin_Keyboard, /**< event generated from F1 key press. */
+
+ /** event generated by wxContextHelp or from the [?] button on
+ the title bar (Windows). */
+ Origin_HelpButton
+ };
+
/**
Constructor.
*/
wxHelpEvent(wxEventType type = wxEVT_NULL,
wxWindowID winid = 0,
const wxPoint& pt = wxDefaultPosition,
- wxHelpEventOrigin origin = wxHE_ORIGIN_UNKNOWN);
+ wxHelpEvent::Origin origin = Origin_Unknown);
/**
Returns the origin of the help event which is one of the ::wxHelpEventOrigin
@see SetOrigin()
*/
- wxHelpEventOrigin GetOrigin() const;
+ wxHelpEvent::Origin GetOrigin() const;
/**
Returns the left-click position of the mouse, in screen coordinates.
@see GetOrigin()
*/
- void SetOrigin(wxHelpEventOrigin);
+ void SetOrigin(wxHelpEvent::Origin origin);
/**
Sets the left-click position of the mouse, in screen coordinates.
/**
@class wxScrollEvent
- @wxheader{event.h}
A scroll event holds information about events sent from stand-alone
scrollbars (see wxScrollBar) and sliders (see wxSlider).
events and use the event table macros mentioned below only for the scrollbar-like
controls.
- @section wxscrollevent_diff The difference between EVT_SCROLL_THUMBRELEASE and EVT_SCROLL_CHANGED
+ @section scrollevent_diff The difference between EVT_SCROLL_THUMBRELEASE and EVT_SCROLL_CHANGED
The EVT_SCROLL_THUMBRELEASE event is only emitted when actually dragging the thumb
using the mouse and releasing it (This EVT_SCROLL_THUMBRELEASE event is also followed
@library{wxcore}
@category{events}
- @see wxScrollBar, wxSlider, wxSpinButton, wxScrollWinEvent, @ref overview_eventhandling
+ @see wxScrollBar, wxSlider, wxSpinButton, wxScrollWinEvent, @ref overview_events
*/
class wxScrollEvent : public wxCommandEvent
{
/**
@class wxIdleEvent
- @wxheader{event.h}
This class is used for idle events, which are generated when the system becomes
idle. Note that, unless you do something specifically, the idle events are not
@beginEventTable{wxIdleEvent}
@event{EVT_IDLE(func)}
- Process a wxEVT_IDLE event.
+ Process a @c wxEVT_IDLE event.
@endEventTable
@library{wxbase}
@category{events}
- @see @ref overview_eventhandling, wxUpdateUIEvent, wxWindow::OnInternalIdle
+ @see @ref overview_events, wxUpdateUIEvent, wxWindow::OnInternalIdle
*/
class wxIdleEvent : public wxEvent
{
/**
@class wxInitDialogEvent
- @wxheader{event.h}
A wxInitDialogEvent is sent as a dialog or panel is being initialised.
Handlers for this event can transfer data to the window.
@beginEventTable{wxInitDialogEvent}
@event{EVT_INIT_DIALOG(func)}
- Process a wxEVT_INIT_DIALOG event.
+ Process a @c wxEVT_INIT_DIALOG event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling
+ @see @ref overview_events
*/
class wxInitDialogEvent : public wxEvent
{
/**
@class wxWindowDestroyEvent
- @wxheader{event.h}
- This event is sent from the wxWindow destructor wxWindow::~wxWindow() when a
- window is destroyed.
+ This event is sent as early as possible during the window destruction
+ process.
- When a class derived from wxWindow is destroyed its destructor will have
- already run by the time this event is sent. Therefore this event will not
- usually be received at all.
+ For the top level windows, as early as possible means that this is done by
+ wxFrame or wxDialog destructor, i.e. after the destructor of the derived
+ class was executed and so any methods specific to the derived class can't
+ be called any more from this event handler. If you need to do this, you
+ must call wxWindow::SendDestroyEvent() from your derived class destructor.
- To receive this event wxEvtHandler::Connect() must be used (using an event
- table macro will not work). Since it is received after the destructor has run,
- an object should not handle its own wxWindowDestroyEvent, but it can be used
- to get notification of the destruction of another window.
+ For the child windows, this event is generated just before deleting the
+ window from wxWindow::Destroy() (which is also called when the parent
+ window is deleted) or from the window destructor if operator @c delete was
+ used directly (which is not recommended for this very reason).
+
+ It is usually pointless to handle this event in the window itself but it ca
+ be very useful to receive notifications about the window destruction in the
+ parent window or in any other object interested in this window.
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling, wxWindowCreateEvent
+ @see @ref overview_events, wxWindowCreateEvent
*/
class wxWindowDestroyEvent : public wxCommandEvent
{
Constructor.
*/
wxWindowDestroyEvent(wxWindow* win = NULL);
-};
-
-/**
- The possible flag values for a wxNavigationKeyEvent.
-*/
-enum wxNavigationKeyEventFlags
-{
- wxNKEF_IS_BACKWARD = 0x0000,
- wxNKEF_IS_FORWARD = 0x0001,
- wxNKEF_WINCHANGE = 0x0002,
- wxNKEF_FROMTAB = 0x0004
+ /// Retutn the window being destroyed.
+ wxWindow *GetWindow() const;
};
/**
@class wxNavigationKeyEvent
- @wxheader{event.h}
This event class contains information about navigation events,
generated by navigation keys such as tab and page down.
class wxNavigationKeyEvent : public wxEvent
{
public:
+ /**
+ Flags which can be used with wxNavigationKeyEvent.
+ */
+ enum wxNavigationKeyEventFlags
+ {
+ IsBackward = 0x0000,
+ IsForward = 0x0001,
+ WinChange = 0x0002,
+ FromTab = 0x0004
+ };
+
wxNavigationKeyEvent();
wxNavigationKeyEvent(const wxNavigationKeyEvent& event);
/**
@class wxMouseCaptureChangedEvent
- @wxheader{event.h}
An mouse capture changed event is sent to a window that loses its
- mouse capture. This is called even if wxWindow::ReleaseCapture
+ mouse capture. This is called even if wxWindow::ReleaseMouse
was called by the application code. Handling this event allows
an application to cater for unexpected capture releases which
might otherwise confuse mouse handling code.
@beginEventTable{wxMouseCaptureChangedEvent}
@event{EVT_MOUSE_CAPTURE_CHANGED(func)}
- Process a wxEVT_MOUSE_CAPTURE_CHANGED event.
+ Process a @c wxEVT_MOUSE_CAPTURE_CHANGED event.
@endEventTable
@library{wxcore}
@category{events}
- @see wxMouseCaptureLostEvent, @ref overview_eventhandling,
- wxWindow::CaptureMouse, wxWindow::ReleaseMouse, wxWindow::GetCapture
+ @see wxMouseCaptureLostEvent, @ref overview_events,
+ wxWindow::CaptureMouse, wxWindow::ReleaseMouse, wxWindow::GetCapture
*/
class wxMouseCaptureChangedEvent : public wxEvent
{
/**
@class wxCloseEvent
- @wxheader{event.h}
This event class contains information about window and session close events.
This allows the wxWindow::Close function to return @true or @false depending
on whether the close instruction was honoured or not.
+ Example of a wxCloseEvent handler:
+
+ @code
+ void MyFrame::OnClose(wxCloseEvent& event)
+ {
+ if ( event.CanVeto() && m_bFileNotSaved )
+ {
+ if ( wxMessageBox("The file has not been saved... continue closing?",
+ "Please confirm",
+ wxICON_QUESTION | wxYES_NO) != wxYES )
+ {
+ event.Veto();
+ return;
+ }
+ }
+
+ Destroy(); // you may also do: event.Skip();
+ // since the default event handler does call Destroy(), too
+ }
+ @endcode
+
The EVT_END_SESSION event is slightly different as it is sent by the system
when the user session is ending (e.g. because of log out or shutdown) and
so all windows are being forcefully closed. At least under MSW, after the
*/
void SetCanVeto(bool canVeto);
- /**
- Sets the 'force' flag.
- */
- void SetForce(bool force) const;
-
/**
Sets the 'logging off' flag.
*/
/**
@class wxMenuEvent
- @wxheader{event.h}
This class is used for a variety of menu-related events. Note that
these do not include menu command events, which are
handled using wxCommandEvent objects.
- The default handler for wxEVT_MENU_HIGHLIGHT displays help
+ The default handler for @c wxEVT_MENU_HIGHLIGHT displays help
text in the first field of the status bar.
@beginEventTable{wxMenuEvent}
@library{wxcore}
@category{events}
- @see wxCommandEvent, @ref overview_eventhandling
+ @see wxCommandEvent, @ref overview_events
*/
class wxMenuEvent : public wxEvent
{
/**
@class wxShowEvent
- @wxheader{event.h}
An event being sent when the window is shown or hidden.
@beginEventTable{wxShowEvent}
@event{EVT_SHOW(func)}
- Process a wxEVT_SHOW event.
+ Process a @c wxEVT_SHOW event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling, wxWindow::Show,
+ @see @ref overview_events, wxWindow::Show,
wxWindow::IsShown
*/
/**
@class wxIconizeEvent
- @wxheader{event.h}
An event being sent when the frame is iconized (minimized) or restored.
@beginEventTable{wxIconizeEvent}
@event{EVT_ICONIZE(func)}
- Process a wxEVT_ICONIZE event.
+ Process a @c wxEVT_ICONIZE event.
@endEventTable
@library{wxcore}
@category{events}
- @see @ref overview_eventhandling, wxTopLevelWindow::Iconize,
+ @see @ref overview_events, wxTopLevelWindow::Iconize,
wxTopLevelWindow::IsIconized
*/
class wxIconizeEvent : public wxEvent
/**
@class wxMoveEvent
- @wxheader{event.h}
- A move event holds information about move change events.
+ A move event holds information about wxTopLevelWindow move change events.
@beginEventTable{wxMoveEvent}
@event{EVT_MOVE(func)}
- Process a wxEVT_MOVE event, which is generated when a window is moved.
+ Process a @c wxEVT_MOVE event, which is generated when a window is moved.
@event{EVT_MOVE_START(func)}
- Process a wxEVT_MOVE_START event, which is generated when the user starts
+ Process a @c wxEVT_MOVE_START event, which is generated when the user starts
to move or size a window. wxMSW only.
@event{EVT_MOVE_END(func)}
- Process a wxEVT_MOVE_END event, which is generated when the user stops
+ Process a @c wxEVT_MOVE_END event, which is generated when the user stops
moving or sizing a window. wxMSW only.
@endEventTable
@library{wxcore}
@category{events}
- @see wxPoint, @ref overview_eventhandling
+ @see wxPoint, @ref overview_events
*/
class wxMoveEvent : public wxEvent
{
/**
@class wxSizeEvent
- @wxheader{event.h}
- A size event holds information about size change events.
+ A size event holds information about size change events of wxWindow.
The EVT_SIZE handler function will be called when the window has been resized.
@beginEventTable{wxSizeEvent}
@event{EVT_SIZE(func)}
- Process a wxEVT_SIZE event.
+ Process a @c wxEVT_SIZE event.
@endEventTable
@library{wxcore}
@category{events}
- @see wxSize, @ref overview_eventhandling
+ @see wxSize, @ref overview_events
*/
class wxSizeEvent : public wxEvent
{
/**
@class wxSetCursorEvent
- @wxheader{event.h}
- A SetCursorEvent is generated when the mouse cursor is about to be set as a
- result of mouse motion.
+ A wxSetCursorEvent is generated from wxWindow when the mouse cursor is about
+ to be set as a result of mouse motion.
This event gives the application the chance to perform specific mouse cursor
processing based on the current position of the mouse within the window.
@beginEventTable{wxSetCursorEvent}
@event{EVT_SET_CURSOR(func)}
- Process a wxEVT_SET_CURSOR event.
+ Process a @c wxEVT_SET_CURSOR event.
@endEventTable
@library{wxcore}
// Global functions/macros
// ============================================================================
-/** @ingroup group_funcmacro_misc */
+/** @addtogroup group_funcmacro_events */
//@{
+/**
+ A value uniquely identifying the type of the event.
+
+ The values of this type should only be created using wxNewEventType().
+
+ See the macro DEFINE_EVENT_TYPE() for more info.
+
+ @see @ref overview_events_introduction
+*/
+typedef int wxEventType;
+
+/**
+ A special event type usually used to indicate that some wxEvent has yet
+ no type assigned.
+*/
+wxEventType wxEVT_NULL;
+
+/**
+ Initializes a new event type using wxNewEventType().
+
+ @deprecated Use wxDEFINE_EVENT() instead
+*/
+#define DEFINE_EVENT_TYPE(name) const wxEventType name = wxNewEventType();
+
+/**
+ Generates a new unique event type.
+
+ Usually this function is only used by wxDEFINE_EVENT() and not called
+ directly.
+*/
+wxEventType wxNewEventType();
+
+/**
+ Define a new event type associated with the specified event class.
+
+ This macro defines a new unique event type @a name associated with the
+ event class @a cls.
+
+ For example:
+ @code
+ wxDEFINE_EVENT(MY_COMMAND_EVENT, wxCommandEvent);
+
+ class MyCustomEvent : public wxEvent { ... };
+ wxDEFINE_EVENT(MY_CUSTOM_EVENT, MyCustomEvent);
+ @endcode
+
+ @see wxDECLARE_EVENT(), @ref overview_events_custom
+ */
+#define wxDEFINE_EVENT(name, cls) \
+ const wxEventTypeTag< cls > name(wxNewEventType())
+
+/**
+ Declares a custom event type.
+
+ This macro declares a variable called @a name which must be defined
+ elsewhere using wxDEFINE_EVENT().
+
+ The class @a cls must be the wxEvent-derived class associated with the
+ events of this type and its full declaration must be visible from the point
+ of use of this macro.
+
+ For example:
+ @code
+ wxDECLARE_EVENT(MY_COMMAND_EVENT, wxCommandEvent);
+
+ class MyCustomEvent : public wxEvent { ... };
+ wxDECLARE_EVENT(MY_CUSTOM_EVENT, MyCustomEvent);
+ @endcode
+ */
+#define wxDECLARE_EVENT(name, cls) \
+ wxDECLARE_EXPORTED_EVENT(wxEMPTY_PARAMETER_VALUE, name, cls)
+
+/**
+ Variant of wxDECLARE_EVENT() used for event types defined inside a shared
+ library.
+
+ This is mostly used by wxWidgets internally, e.g.
+ @code
+ wxDECLARE_EXPORTED_EVENT(WXDLLIMPEXP_CORE, wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEvent)
+ @endcode
+ */
+#define wxDECLARE_EXPORTED_EVENT( expdecl, name, cls ) \
+ extern const expdecl wxEventTypeTag< cls > name;
+
+/**
+ Helper macro for definition of custom event table macros.
+
+ This macro must only be used if wxEVENTS_COMPATIBILITY_2_8 is 1, otherwise
+ it is better and more clear to just use the address of the function
+ directly as this is all this macro does in this case. However it needs to
+ explicitly cast @a func to @a functype, which is the type of wxEvtHandler
+ member function taking the custom event argument when
+ wxEVENTS_COMPATIBILITY_2_8 is 0.
+
+ See wx__DECLARE_EVT0 for an example of use.
+
+ @see @ref overview_events_custom_ownclass
+ */
+#define wxEVENT_HANDLER_CAST(functype, func) (&func)
+
+/**
+ This macro is used to define event table macros for handling custom
+ events.
+
+ Example of use:
+ @code
+ class MyEvent : public wxEvent { ... };
+
+ // note that this is not necessary unless using old compilers: for the
+ // reasonably new ones just use &func instead of MyEventHandler(func)
+ typedef void (wxEvtHandler::*MyEventFunction)(MyEvent&);
+ #define MyEventHandler(func) wxEVENT_HANDLER_CAST(MyEventFunction, func)
+
+ wxDEFINE_EVENT(MY_EVENT_TYPE, MyEvent);
+
+ #define EVT_MY(id, func) \
+ wx__DECLARE_EVT1(MY_EVENT_TYPE, id, MyEventHandler(func))
+
+ ...
+
+ BEGIN_EVENT_TABLE(MyFrame, wxFrame)
+ EVT_MY(wxID_ANY, MyFrame::OnMyEvent)
+ END_EVENT_TABLE()
+ @endcode
+
+ @param evt
+ The event type to handle.
+ @param id
+ The identifier of events to handle.
+ @param fn
+ The event handler method.
+ */
+#define wx__DECLARE_EVT1(evt, id, fn) \
+ wx__DECLARE_EVT2(evt, id, wxID_ANY, fn)
+
+/**
+ Generalized version of the wx__DECLARE_EVT1() macro taking a range of
+ IDs instead of a single one.
+ Argument @a id1 is the first identifier of the range, @a id2 is the
+ second identifier of the range.
+*/
+#define wx__DECLARE_EVT2(evt, id1, id2, fn) \
+ DECLARE_EVENT_TABLE_ENTRY(evt, id1, id2, fn, NULL),
+
+/**
+ Simplified version of the wx__DECLARE_EVT1() macro, to be used when the
+ event type must be handled regardless of the ID associated with the
+ specific event instances.
+*/
+#define wx__DECLARE_EVT0(evt, fn) \
+ wx__DECLARE_EVT1(evt, wxID_ANY, fn)
+
+
+/**
+ Use this macro inside a class declaration to declare a @e static event table
+ for that class.
+
+ In the implementation file you'll need to use the BEGIN_EVENT_TABLE()
+ and the END_EVENT_TABLE() macros, plus some additional @c EVT_xxx macro
+ to capture events.
+
+ @see @ref overview_events_eventtables
+*/
+#define DECLARE_EVENT_TABLE()
+
+/**
+ Use this macro in a source file to start listing @e static event handlers
+ for a specific class.
+
+ Use END_EVENT_TABLE() to terminate the event-declaration block.
+
+ @see @ref overview_events_eventtables
+*/
+#define BEGIN_EVENT_TABLE(theClass, baseClass)
+
+/**
+ Use this macro in a source file to end listing @e static event handlers
+ for a specific class.
+
+ Use BEGIN_EVENT_TABLE() to start the event-declaration block.
+
+ @see @ref overview_events_eventtables
+*/
+#define END_EVENT_TABLE()
+
/**
In a GUI application, this function posts @a event to the specified @e dest
object using wxEvtHandler::AddPendingEvent().
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