wxTaskBarIcon Class Reference

#include <wx/taskbar.h>

Inheritance diagram for wxTaskBarIcon:

Detailed Description

This class represents a taskbar icon.

A taskbar icon is an icon that appears in the 'system tray' and responds to mouse clicks, optionally with a tooltip above it to help provide information.

X Window System Note

Under X Window System, the window manager must support either the "System Tray Protocol" (see http://freedesktop.org/wiki/Specifications/systemtray-spec) by freedesktop.org (WMs used by modern desktop environments such as GNOME >= 2, KDE >= 3 and XFCE >= 4 all do) or the older methods used in GNOME 1.2 and KDE 1 and 2.

If it doesn't, the icon will appear as a toplevel window on user's desktop. Because not all window managers have system tray, there's no guarantee that wxTaskBarIcon will work correctly under X Window System and so the applications should use it only as an optional component of their user interface. The user should be required to explicitly enable the taskbar icon on Unix, it shouldn't be on by default.

Events emitted by this class

The following event handler macros redirect the events to member function handlers 'func' with prototypes like:

void handlerFuncName(wxTaskBarIconEvent& event)

Event macros for events emitted by this class:

Note that not all ports are required to send these events and so it's better to override wxTaskBarIcon::CreatePopupMenu() if all that the application does is that it shows a popup menu in reaction to mouse click.

• EVT_TASKBAR_MOVE(func):
  Process a wxEVT_TASKBAR_MOVE event.
• EVT_TASKBAR_LEFT_DOWN(func):
  Process a wxEVT_TASKBAR_LEFT_DOWN event.
• EVT_TASKBAR_LEFT_UP(func):
  Process a wxEVT_TASKBAR_LEFT_UP event.
• EVT_TASKBAR_RIGHT_DOWN(func):
  Process a wxEVT_TASKBAR_RIGHT_DOWN event.
• EVT_TASKBAR_RIGHT_UP(func):
  Process a wxEVT_TASKBAR_RIGHT_UP event.
• EVT_TASKBAR_LEFT_DCLICK(func):
  Process a wxEVT_TASKBAR_LEFT_DCLICK event.
• EVT_TASKBAR_RIGHT_DCLICK(func):
  Process a wxEVT_TASKBAR_RIGHT_DCLICK event.
• EVT_TASKBAR_CLICK(func):
  This is a synonym for either EVT_TASKBAR_RIGHT_DOWN or UP depending on the platform, use this event macro to catch the event which should result in the menu being displayed on the current platform.

Library:  wxAdvanced

Category:  Miscellaneous

Public Member Functions
	wxTaskBarIcon (wxTaskBarIconType iconType=wxTBI_DEFAULT_TYPE)
	Default constructor.
virtual	~wxTaskBarIcon ()
	Destroys the wxTaskBarIcon object, removing the icon if not already removed.
void	Destroy ()
	This method is similar to wxWindow::Destroy and can be used to schedule the task bar icon object for the delayed destruction: it will be deleted during the next event loop iteration, which allows the task bar icon to process any pending events for it before being destroyed.
bool	IsIconInstalled () const
	Returns true if SetIcon() was called with no subsequent RemoveIcon().
bool	IsOk () const
	Returns true if the object initialized successfully.
virtual bool	PopupMenu (wxMenu *menu)
	Pops up a menu at the current mouse position.
virtual bool	RemoveIcon ()
	Removes the icon previously set with SetIcon().
virtual bool	SetIcon (const wxIcon &icon, const wxString &tooltip=wxEmptyString)
	Sets the icon, and optional tooltip text.
Public Member Functions inherited from wxEvtHandler
	wxEvtHandler ()
	Constructor.
virtual	~wxEvtHandler ()
	Destructor.
virtual void	QueueEvent (wxEvent *event)
	Queue event for a later processing.
virtual void	AddPendingEvent (const wxEvent &event)
	Post an event to be processed later.
template<typename T , typename T1 , ... >
void	CallAfter (void(T::*method)(T1,...), T1 x1,...)
	Asynchronously call the given method.
template<typename T >
void	CallAfter (const T &functor)
	Asynchronously call the given functor.
virtual bool	ProcessEvent (wxEvent &event)
	Processes an event, searching event tables and calling zero or more suitable event handler function(s).
bool	ProcessEventLocally (wxEvent &event)
	Try to process the event in this handler and all those chained to it.
bool	SafelyProcessEvent (wxEvent &event)
	Processes an event by calling ProcessEvent() and handles any exceptions that occur in the process.
void	ProcessPendingEvents ()
	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 wxCHECK will fail.
void	DeletePendingEvents ()
	Deletes all events queued on this event handler using QueueEvent() or AddPendingEvent().
virtual bool	SearchEventTable (wxEventTable &table, wxEvent &event)
	Searches the event table, executing an event handler function if an appropriate one is found.
void	Connect (int id, int lastId, wxEventType eventType, wxObjectEventFunction function, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	Connects the given function dynamically with the event handler, id and event type.
void	Connect (int id, wxEventType eventType, wxObjectEventFunction function, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	See the Connect(int, int, wxEventType, wxObjectEventFunction, wxObject*, wxEvtHandler*) overload for more info.
void	Connect (wxEventType eventType, wxObjectEventFunction function, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	See the Connect(int, int, wxEventType, wxObjectEventFunction, wxObject*, wxEvtHandler*) overload for more info.
bool	Disconnect (wxEventType eventType, wxObjectEventFunction function, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	Disconnects the given function dynamically from the event handler, using the specified parameters as search criteria and returning true if a matching function has been found and removed.
bool	Disconnect (int id=wxID_ANY, wxEventType eventType=wxEVT_NULL, wxObjectEventFunction function=NULL, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	See the Disconnect(wxEventType, wxObjectEventFunction, wxObject*, wxEvtHandler*) overload for more info.
bool	Disconnect (int id, int lastId, wxEventType eventType, wxObjectEventFunction function=NULL, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	See the Disconnect(wxEventType, wxObjectEventFunction, wxObject*, wxEvtHandler*) overload for more info.
template<typename EventTag , typename Functor >
void	Bind (const EventTag &eventType, Functor functor, int id=wxID_ANY, int lastId=wxID_ANY, wxObject *userData=NULL)
	Binds the given function, functor or method dynamically with the event.
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)
	See the Bind<>(const EventTag&, Functor, int, int, wxObject*) overload for more info.
template<typename EventTag , typename Functor >
bool	Unbind (const EventTag &eventType, Functor functor, int id=wxID_ANY, int lastId=wxID_ANY, wxObject *userData=NULL)
	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.
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)
	See the Unbind<>(const EventTag&, Functor, int, int, wxObject*) overload for more info.
void *	GetClientData () const
	Returns user-supplied client data.
wxClientData *	GetClientObject () const
	Returns a pointer to the user-supplied client data object.
void	SetClientData (void *data)
	Sets user-supplied client data.
void	SetClientObject (wxClientData *data)
	Set the client data object.
bool	GetEvtHandlerEnabled () const
	Returns true if the event handler is enabled, false otherwise.
wxEvtHandler *	GetNextHandler () const
	Returns the pointer to the next handler in the chain.
wxEvtHandler *	GetPreviousHandler () const
	Returns the pointer to the previous handler in the chain.
void	SetEvtHandlerEnabled (bool enabled)
	Enables or disables the event handler.
virtual void	SetNextHandler (wxEvtHandler *handler)
	Sets the pointer to the next handler.
virtual void	SetPreviousHandler (wxEvtHandler *handler)
	Sets the pointer to the previous handler.
void	Unlink ()
	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).
bool	IsUnlinked () const
	Returns true if the next and the previous handler pointers of this event handler instance are NULL.
Public Member Functions inherited from wxObject
	wxObject ()
	Default ctor; initializes to NULL the internal reference data.
	wxObject (const wxObject &other)
	Copy ctor.
virtual	~wxObject ()
	Destructor.
virtual wxClassInfo *	GetClassInfo () const
	This virtual function is redefined for every class that requires run-time type information, when using the wxDECLARE_CLASS macro (or similar).
wxObjectRefData *	GetRefData () const
	Returns the wxObject::m_refData pointer, i.e. the data referenced by this object.
bool	IsKindOf (const wxClassInfo *info) const
	Determines whether this class is a subclass of (or the same class as) the given class.
bool	IsSameAs (const wxObject &obj) const
	Returns true if this object has the same data pointer as obj.
void	Ref (const wxObject &clone)
	Makes this object refer to the data in clone.
void	SetRefData (wxObjectRefData *data)
	Sets the wxObject::m_refData pointer.
void	UnRef ()
	Decrements the reference count in the associated data, and if it is zero, deletes the data.
void	UnShare ()
	This is the same of AllocExclusive() but this method is public.
void	operator delete (void *buf)
	The delete operator is defined for debugging versions of the library only, when the identifier WXDEBUG is defined.
void *	operator new (size_t size, const wxString &filename=NULL, int lineNum=0)
	The new operator is defined for debugging versions of the library only, when the identifier WXDEBUG is defined.

Static Public Member Functions
static bool	IsAvailable ()
	Returns true if system tray is available in the desktop environment the app runs under.
Static Public Member Functions inherited from wxEvtHandler
static void	AddFilter (wxEventFilter *filter)
	Add an event filter whose FilterEvent() method will be called for each and every event processed by wxWidgets.
static void	RemoveFilter (wxEventFilter *filter)
	Remove a filter previously installed with AddFilter().

Protected Member Functions
virtual wxMenu *	CreatePopupMenu ()
	This method is called by the library when the user requests popup menu (on Windows and Unix platforms, this is when the user right-clicks the icon).
Protected Member Functions inherited from wxEvtHandler
virtual bool	TryBefore (wxEvent &event)
	Method called by ProcessEvent() before examining this object event tables.
virtual bool	TryAfter (wxEvent &event)
	Method called by ProcessEvent() as last resort.
Protected Member Functions inherited from wxObject
void	AllocExclusive ()
	Ensure that this object's data is not shared with any other object.
virtual wxObjectRefData *	CreateRefData () const
	Creates a new instance of the wxObjectRefData-derived class specific to this object and returns it.
virtual wxObjectRefData *	CloneRefData (const wxObjectRefData *data) const
	Creates a new instance of the wxObjectRefData-derived class specific to this object and initializes it copying data.

Additional Inherited Members
Protected Attributes inherited from wxObject
wxObjectRefData *	m_refData
	Pointer to an object which is the object's reference-counted data.

Constructor & Destructor Documentation

wxTaskBarIcon::wxTaskBarIcon

(

wxTaskBarIconType

iconType = wxTBI_DEFAULT_TYPE

)

Default constructor.

The iconType is only applicable on wxOSX_Cocoa.

virtual wxTaskBarIcon::~wxTaskBarIcon ( )

virtual

Destroys the wxTaskBarIcon object, removing the icon if not already removed.

Member Function Documentation

virtual wxMenu* wxTaskBarIcon::CreatePopupMenu ( )

protectedvirtual

This method is called by the library when the user requests popup menu (on Windows and Unix platforms, this is when the user right-clicks the icon).

Override this function in order to provide popup menu associated with the icon. If CreatePopupMenu() returns NULL (this happens by default), no menu is shown, otherwise the menu is displayed and then deleted by the library as soon as the user dismisses it.

The events can be handled by a class derived from wxTaskBarIcon.

void wxTaskBarIcon::Destroy

(

)

This method is similar to wxWindow::Destroy and can be used to schedule the task bar icon object for the delayed destruction: it will be deleted during the next event loop iteration, which allows the task bar icon to process any pending events for it before being destroyed.

static bool wxTaskBarIcon::IsAvailable ( )

static

Returns true if system tray is available in the desktop environment the app runs under.

On Windows and Mac OS X, the tray is always available and this function simply returns true.

On Unix, X11 environment may or may not provide the tray, depending on user's desktop environment. Most modern desktops support the tray via the System Tray Protocol by freedesktop.org (http://freedesktop.org/wiki/Specifications/systemtray-spec).

Note

Tray availability may change during application's lifetime under X11 and so applications shouldn't cache the result.

wxTaskBarIcon supports older GNOME 1.2 and KDE 1/2 methods of adding icons to tray, but they are unreliable and this method doesn't detect them.

Since

2.9.0

bool wxTaskBarIcon::IsIconInstalled

(

)

const

Returns true if SetIcon() was called with no subsequent RemoveIcon().

bool wxTaskBarIcon::IsOk

(

)

const

Returns true if the object initialized successfully.

virtual bool wxTaskBarIcon::PopupMenu ( wxMenu *  menu )

virtual

Pops up a menu at the current mouse position.

The events can be handled by a class derived from wxTaskBarIcon.

Note

It is recommended to override CreatePopupMenu() callback instead of calling this method from event handler, because some ports (e.g. wxCocoa) may not implement PopupMenu() and mouse click events at all.

virtual bool wxTaskBarIcon::RemoveIcon ( )

virtual

Removes the icon previously set with SetIcon().

virtual bool wxTaskBarIcon::SetIcon ( const wxIcon &  icon, const wxString &  tooltip = wxEmptyString  )

virtual

Sets the icon, and optional tooltip text.