interface/wx/taskbar.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        taskbar.h
   3 // Purpose:     interface of wxTaskBarIcon
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9
  10 /**
  11     @class wxTaskBarIconEvent
  12
  13     The event class used by wxTaskBarIcon.
  14     For a list of the event macros meant to be used with wxTaskBarIconEvent,
  15     please look at wxTaskBarIcon description.
  16
  17     @library{wxadv}
  18     @category{events}
  19 */
  20 class wxTaskBarIconEvent : public wxEvent
  21 {
  22 public:
  23     /**
  24         Constructor.
  25     */
  26     wxTaskBarIconEvent(wxEventType evtType, wxTaskBarIcon *tbIcon);
  27 };
  28
  29 /**
  30     @class wxTaskBarIcon
  31
  32     This class represents a taskbar icon.
  33     A taskbar icon is an icon that appears in the 'system tray' and responds to
  34     mouse clicks, optionally with a tooltip above it to help provide information.
  35
  36
  37     @section taskbaricon_xnote X Window System Note
  38
  39     Under X Window System, the window manager must support either the
  40     "System Tray Protocol" (see http://freedesktop.org/wiki/Specifications/systemtray-spec)
  41     by freedesktop.org (WMs used by modern desktop environments such as GNOME >= 2,
  42     KDE >= 3 and XFCE >= 4 all do) or the older methods used in GNOME 1.2 and KDE 1 and 2.
  43
  44     If it doesn't, the icon will appear as a toplevel window on user's desktop.
  45     Because not all window managers have system tray, there's no guarantee that
  46     wxTaskBarIcon will work correctly under X Window System and so the applications
  47     should use it only as an optional component of their user interface.
  48     The user should be required to explicitly enable the taskbar icon on Unix,
  49     it shouldn't be on by default.
  50
  51     @beginEventEmissionTable{wxTaskBarIconEvent}
  52     Note that not all ports are required to send these events and so it's better
  53     to override wxTaskBarIcon::CreatePopupMenu() if all that the application does
  54     is that it shows a popup menu in reaction to mouse click.
  55     @event{EVT_TASKBAR_MOVE(func)}
  56         Process a wxEVT_TASKBAR_MOVE event.
  57     @event{EVT_TASKBAR_LEFT_DOWN(func)}
  58         Process a wxEVT_TASKBAR_LEFT_DOWN event.
  59     @event{EVT_TASKBAR_LEFT_UP(func)}
  60         Process a wxEVT_TASKBAR_LEFT_UP event.
  61     @event{EVT_TASKBAR_RIGHT_DOWN(func)}
  62         Process a wxEVT_TASKBAR_RIGHT_DOWN event.
  63     @event{EVT_TASKBAR_RIGHT_UP(func)}
  64         Process a wxEVT_TASKBAR_RIGHT_UP event.
  65     @event{EVT_TASKBAR_LEFT_DCLICK(func)}
  66         Process a wxEVT_TASKBAR_LEFT_DCLICK event.
  67     @event{EVT_TASKBAR_RIGHT_DCLICK(func)}
  68         Process a wxEVT_TASKBAR_RIGHT_DCLICK event.
  69     @event{EVT_TASKBAR_CLICK(func)}
  70         This is a synonym for either EVT_TASKBAR_RIGHT_DOWN or UP depending on
  71         the platform, use this event macro to catch the event which should result
  72         in the menu being displayed on the current platform.
  73     @endEventTable
  74
  75     @library{wxadv}
  76     @category{misc}
  77 */
  78 class wxTaskBarIcon : public wxEvtHandler
  79 {
  80 public:
  81     /**
  82         Default constructor.
  83     */
  84     wxTaskBarIcon();
  85
  86     /**
  87         Destroys the wxTaskBarIcon object, removing the icon if not already removed.
  88     */
  89     virtual ~wxTaskBarIcon();
  90
  91     /**
  92         This method is similar to wxWindow::Destroy and can be used to schedule
  93         the task bar icon object for the delayed destruction: it will be deleted
  94         during the next event loop iteration, which allows the task bar
  95         icon to process any pending events for it before being destroyed.
  96     */
  97     void Destroy();
  98
  99     /**
 100         Returns @true if SetIcon() was called with no subsequent RemoveIcon().
 101     */
 102     bool IsIconInstalled() const;
 103
 104     /**
 105         Returns @true if the object initialized successfully.
 106     */
 107     bool IsOk() const;
 108
 109     /**
 110         Pops up a menu at the current mouse position.
 111         The events can be handled by a class derived from wxTaskBarIcon.
 112
 113         @note
 114         It is recommended to override CreatePopupMenu() callback instead of
 115         calling this method from event handler, because some ports (e.g. wxCocoa)
 116         may not implement PopupMenu() and mouse click events at all.
 117     */
 118     virtual bool PopupMenu(wxMenu* menu);
 119
 120     /**
 121         Removes the icon previously set with SetIcon().
 122     */
 123     virtual bool RemoveIcon();
 124
 125     /**
 126         Sets the icon, and optional tooltip text.
 127     */
 128     virtual bool SetIcon(const wxIcon& icon,
 129                          const wxString& tooltip = wxEmptyString);
 130
 131     /**
 132         Returns true if system tray is available in the desktop environment the
 133         app runs under.
 134
 135         On Windows and Mac OS X, the tray is always available and this function
 136         simply returns true.
 137
 138         On Unix, X11 environment may or may not provide the tray, depending on
 139         user's desktop environment. Most modern desktops support the tray via
 140         the System Tray Protocol by freedesktop.org
 141         (http://freedesktop.org/wiki/Specifications/systemtray-spec).
 142
 143         @note Tray availability may change during application's lifetime
 144               under X11 and so applications shouldn't cache the result.
 145
 146         @note wxTaskBarIcon supports older GNOME 1.2 and KDE 1/2 methods of
 147               adding icons to tray, but they are unreliable and this method
 148               doesn't detect them.
 149
 150         @since 2.9.0
 151     */
 152     static bool IsAvailable();
 153
 154 protected:
 155
 156     /**
 157         This method is called by the library when the user requests popup menu
 158         (on Windows and Unix platforms, this is when the user right-clicks the icon).
 159
 160         Override this function in order to provide popup menu associated with the icon.
 161         If CreatePopupMenu() returns @NULL (this happens by default), no menu is shown,
 162         otherwise the menu is displayed and then deleted by the library as soon as the
 163         user dismisses it.
 164
 165         The events can be handled by a class derived from wxTaskBarIcon.
 166     */
 167     virtual wxMenu* CreatePopupMenu();
 168 };
 169