src/mac/carbon/taskbar.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/taskbar.cpp
   3 // Purpose:     wxTaskBarIcon
   4 // Author:      Ryan Norton
   5 // Modified by:
   6 // Created:     09/25/2004
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2004 Ryan Norton
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_TASKBARICON
  15
  16 #include "wx/taskbar.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/dcmemory.h"
  20     #include "wx/menu.h"
  21     #include "wx/toplevel.h"
  22     #include "wx/icon.h"
  23 #endif
  24
  25 #include "wx/mac/private.h"
  26
  27 class wxTaskBarIconImpl
  28 {
  29 public:
  30     wxTaskBarIconImpl(wxTaskBarIcon* parent);
  31     virtual ~wxTaskBarIconImpl();
  32
  33     virtual bool IsIconInstalled() const = 0;
  34     virtual bool SetIcon(const wxIcon& icon, const wxString& tooltip) = 0;
  35     virtual bool RemoveIcon() = 0;
  36     virtual bool PopupMenu(wxMenu *menu) = 0;
  37
  38     wxMenu * CreatePopupMenu()
  39     { return m_parent->CreatePopupMenu(); }
  40
  41     wxTaskBarIcon *m_parent;
  42     class wxTaskBarIconWindow *m_menuEventWindow;
  43
  44     DECLARE_NO_COPY_CLASS(wxTaskBarIconImpl)
  45 };
  46
  47 //-----------------------------------------------------------------------------
  48 //
  49 //  wxTaskBarIconWindow
  50 //
  51 //  Event handler for menus
  52 //  NB: Since wxWindows in Mac HAVE to have parents we need this to be
  53 //  a top level window...
  54 //-----------------------------------------------------------------------------
  55
  56 class wxTaskBarIconWindow : public wxTopLevelWindow
  57 {
  58 public:
  59     wxTaskBarIconWindow(wxTaskBarIconImpl *impl)
  60         : wxTopLevelWindow(NULL, wxID_ANY, wxEmptyString), m_impl(impl)
  61     {
  62         Connect(
  63             -1, wxEVT_COMMAND_MENU_SELECTED,
  64             wxCommandEventHandler(wxTaskBarIconWindow::OnMenuEvent) );
  65     }
  66
  67     void OnMenuEvent(wxCommandEvent& event)
  68     {
  69         m_impl->m_parent->ProcessEvent(event);
  70     }
  71
  72 private:
  73     wxTaskBarIconImpl *m_impl;
  74 };
  75
  76 class wxDockTaskBarIcon : public wxTaskBarIconImpl
  77 {
  78 public:
  79     wxDockTaskBarIcon(wxTaskBarIcon* parent);
  80     virtual ~wxDockTaskBarIcon();
  81
  82     virtual bool IsIconInstalled() const;
  83     virtual bool SetIcon(const wxIcon& icon, const wxString& tooltip);
  84     virtual bool RemoveIcon();
  85     virtual bool PopupMenu(wxMenu *menu);
  86
  87     wxMenu* DoCreatePopupMenu();
  88
  89     EventHandlerRef     m_eventHandlerRef;
  90     EventHandlerUPP     m_eventupp;
  91     wxWindow           *m_eventWindow;
  92     wxMenu             *m_pMenu;
  93     MenuRef             m_theLastMenu;
  94     bool                m_iconAdded;
  95 };
  96
  97 // Forward declarations for utility functions for dock implementation
  98 pascal OSStatus wxDockEventHandler(
  99     EventHandlerCallRef inHandlerCallRef,
 100     EventRef inEvent, void* pData );
 101 wxMenu * wxDeepCopyMenu( wxMenu *menu );
 102
 103
 104 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 105 //
 106 //  wxTaskBarIconImpl
 107 //
 108 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 109
 110 wxTaskBarIconImpl::wxTaskBarIconImpl(wxTaskBarIcon* parent)
 111     : m_parent(parent), m_menuEventWindow(new wxTaskBarIconWindow(this))
 112 {
 113 }
 114
 115 wxTaskBarIconImpl::~wxTaskBarIconImpl()
 116 {
 117     delete m_menuEventWindow;
 118 }
 119
 120 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 121 //
 122 //  wxDockTaskBarIcon
 123 //
 124 //  OS X Dock implementation of wxTaskBarIcon using Carbon
 125 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 126
 127 //-----------------------------------------------------------------------------
 128 // wxDockEventHandler
 129 //
 130 // This is the global Mac/Carbon event handler for the dock.
 131 // We need this for two reasons:
 132 // 1) To handle wxTaskBarIcon menu events (see below for why)
 133 // 2) To handle events from the dock when it requests a menu
 134 //-----------------------------------------------------------------------------
 135 pascal OSStatus wxDockEventHandler( EventHandlerCallRef inHandlerCallRef,
 136                                     EventRef inEvent, void *pData )
 137 {
 138     // Get the parameters we want from the event
 139     wxDockTaskBarIcon* pTB = (wxDockTaskBarIcon*) pData;
 140     const UInt32 eventClass = GetEventClass(inEvent);
 141     const UInt32 eventKind = GetEventKind(inEvent);
 142
 143     // Handle wxTaskBar menu events (note that this is a global event handler
 144     // so it will actually get called by all commands/menus)
 145     if ((eventClass == kEventClassCommand) && (eventKind == kEventCommandProcess))
 146     {
 147         // if we have no taskbar menu quickly pass it back to wxApp
 148         if (pTB->m_pMenu == NULL)
 149             return eventNotHandledErr;
 150
 151         // This is the real reason why we need this. Normally menus
 152         // get handled in wxMacAppEventHandler
 153         //
 154         // pascal OSStatus wxMacAppEventHandler(EventHandlerCallRef handler,
 155         //                                      EventRef event, void *data)
 156         //
 157         // However, in the case of a taskbar menu call
 158         // command.menu.menuRef IS NULL!
 159         // Which causes the wxApp handler just to skip it.
 160         MenuRef taskbarMenuRef = MAC_WXHMENU(pTB->m_pMenu->GetHMenu());
 161         OSStatus err;
 162
 163         // get the HICommand from the event
 164         HICommand command;
 165         err = GetEventParameter(
 166             inEvent, kEventParamDirectObject,
 167             typeHICommand, NULL,
 168             sizeof(HICommand), NULL, &command );
 169         if (err == noErr)
 170         {
 171             // Obtain the REAL menuRef and the menuItemIndex in the real menuRef
 172             //
 173             // NOTE: menuRef is generally used here for submenus, as
 174             // GetMenuItemRefCon could give an incorrect wxMenuItem if we pass
 175             // just the top level wxTaskBar menu
 176             MenuItemIndex menuItemIndex;
 177             MenuRef menuRef;
 178
 179             err = GetIndMenuItemWithCommandID(
 180                 taskbarMenuRef,
 181                 command.commandID,
 182                 1, &menuRef, &menuItemIndex );
 183             if (err == noErr)
 184             {
 185                 MenuCommand id = command.commandID;
 186                 wxMenuItem *item = NULL;
 187
 188                 if (id != 0) // get the wxMenuItem reference from the MenuRef
 189                     GetMenuItemRefCon( menuRef, menuItemIndex, (URefCon*) &item );
 190
 191                 if (item)
 192                 {
 193                     // Handle items that are checkable
 194                     // FIXME: Doesn't work (at least on 10.2)!
 195                     if (item->IsCheckable())
 196                         item->Check( !item->IsChecked() );
 197
 198                     // send the wxEvent to the wxMenu
 199                     item->GetMenu()->SendEvent( id, item->IsCheckable() ? item->IsChecked() : -1 );
 200
 201                     // successfully handled the event
 202                     err = noErr;
 203                 }
 204             }
 205         } //end if noErr on getting HICommand from event
 206
 207         // return whether we handled the event or not
 208         return err;
 209     }
 210
 211     // We better have a kEventClassApplication/kEventAppGetDockTileMenu combo here,
 212     // otherwise something is truly funky
 213     wxASSERT(eventClass == kEventClassApplication &&
 214              eventKind == kEventAppGetDockTileMenu);
 215
 216     // process the right click events
 217     // NB: This may result in double or even triple-creation of the menus
 218     // We need to do this for 2.4 compat, however
 219     wxTaskBarIconEvent downevt(wxEVT_TASKBAR_RIGHT_DOWN, NULL);
 220     pTB->m_parent->ProcessEvent(downevt);
 221
 222     wxTaskBarIconEvent upevt(wxEVT_TASKBAR_RIGHT_UP, NULL);
 223     pTB->m_parent->ProcessEvent(upevt);
 224
 225     // create popup menu
 226     wxMenu* menu = pTB->DoCreatePopupMenu();
 227
 228     OSStatus err = eventNotHandledErr;
 229
 230     if (menu != NULL)
 231     {
 232         // note to self - a MenuRef *is* a MenuHandle
 233         MenuRef hMenu = MAC_WXHMENU(menu->GetHMenu());
 234
 235         // When SetEventParameter is called it will decrement
 236         // the reference count of the menu - we need to make
 237         // sure it stays around in the wxMenu class here
 238         CFRetain(hMenu);
 239
 240         // set the actual dock menu
 241         err = SetEventParameter(
 242             inEvent, kEventParamMenuRef,
 243             typeMenuRef, sizeof(MenuRef), &hMenu );
 244         verify_noerr( err );
 245     }
 246
 247     return err;
 248 }
 249
 250 //-----------------------------------------------------------------------------
 251 // wxDeepCopyMenu
 252 //
 253 // Performs a top-to-bottom copy of the input menu and all of its
 254 // submenus.
 255 //
 256 // This is mostly needed for 2.4 compatability. However wxPython and others
 257 // still use this way of setting the taskbarmenu.
 258 //-----------------------------------------------------------------------------
 259 wxMenu * wxDeepCopyMenu( wxMenu *menu )
 260 {
 261     if (menu == NULL)
 262         return NULL;
 263
 264     // NB:  Here we have to perform a deep copy of the menu,
 265     // copying each and every menu item from menu to m_pMenu.
 266     // Other implementations use wxWindow::PopupMenu here,
 267     // which idle execution until the user selects something,
 268     // but since the Mac handles this internally, we can't -
 269     // and have no way at all to idle it while the dock menu
 270     // is being shown before menu goes out of scope (it may
 271     // not be on the heap, and may expire right after this function
 272     // is done - we need it to last until the carbon event is triggered -
 273     // that's when the user right clicks).
 274     //
 275     // Also, since there is no equal (assignment) operator
 276     // on either wxMenu or wxMenuItem, we have to do all the
 277     // dirty work ourselves.
 278
 279     // perform a deep copy of the menu
 280     wxMenuItemList& theList = menu->GetMenuItems();
 281     wxMenuItemList::compatibility_iterator theNode = theList.GetFirst();
 282
 283     // create the main menu
 284     wxMenu *m_pMenu = new wxMenu(menu->GetTitle());
 285
 286     while (theNode != NULL)
 287     {
 288         wxMenuItem* theItem = theNode->GetData();
 289         m_pMenu->Append(
 290             new wxMenuItem(
 291                 m_pMenu, // parent menu
 292                 theItem->GetId(), // id
 293                 theItem->GetText(), // text label
 294                 theItem->GetHelp(), // status bar help string
 295                 theItem->GetKind(), // menu flags - checkable, separator, etc.
 296                 wxDeepCopyMenu(theItem->GetSubMenu()) )); // submenu
 297
 298         theNode = theNode->GetNext();
 299     }
 300
 301     return m_pMenu;
 302 }
 303
 304 //-----------------------------------------------------------------------------
 305 // wxDockTaskBarIcon ctor
 306 //
 307 // Initializes the dock implementation of wxTaskBarIcon.
 308 //
 309 // Here we create some Mac-specific event handlers and UPPs.
 310 //-----------------------------------------------------------------------------
 311 wxDockTaskBarIcon::wxDockTaskBarIcon(wxTaskBarIcon* parent)
 312     :   wxTaskBarIconImpl(parent),
 313         m_eventHandlerRef(NULL), m_pMenu(NULL),
 314         m_theLastMenu(GetApplicationDockTileMenu()), m_iconAdded(false)
 315 {
 316     // register the events that will return the dock menu
 317     EventTypeSpec tbEventList[] =
 318     {
 319         { kEventClassCommand, kEventProcessCommand },
 320         { kEventClassApplication, kEventAppGetDockTileMenu }
 321     };
 322
 323     m_eventupp = NewEventHandlerUPP(wxDockEventHandler);
 324     wxASSERT(m_eventupp != NULL);
 325
 326     OSStatus err = InstallApplicationEventHandler(
 327             m_eventupp,
 328             GetEventTypeCount(tbEventList), tbEventList,
 329             this, &m_eventHandlerRef);
 330     verify_noerr( err );
 331 }
 332
 333 //-----------------------------------------------------------------------------
 334 // wxDockTaskBarIcon Destructor
 335 //
 336 // Cleans up mac events and restores the old icon to the dock
 337 //-----------------------------------------------------------------------------
 338 wxDockTaskBarIcon::~wxDockTaskBarIcon()
 339 {
 340     // clean up event handler and event UPP
 341     RemoveEventHandler(m_eventHandlerRef);
 342     DisposeEventHandlerUPP(m_eventupp);
 343
 344     // restore old icon and menu to the dock
 345     RemoveIcon();
 346 }
 347
 348 //-----------------------------------------------------------------------------
 349 // wxDockTaskBarIcon::DoCreatePopupMenu
 350 //
 351 // Helper function that handles a request from the dock event handler
 352 // to get the menu for the dock
 353 //-----------------------------------------------------------------------------
 354 wxMenu * wxDockTaskBarIcon::DoCreatePopupMenu()
 355 {
 356     // get the menu from the parent
 357     wxMenu* theNewMenu = CreatePopupMenu();
 358
 359     if (theNewMenu)
 360     {
 361         if (m_pMenu)
 362             delete m_pMenu;
 363         m_pMenu = theNewMenu;
 364         m_pMenu->SetInvokingWindow(m_menuEventWindow);
 365     }
 366
 367     // the return here can be one of three things
 368     // (in order of priority):
 369     // 1) User passed a menu from CreatePopupMenu override
 370     // 2) menu sent to and copied from PopupMenu
 371     // 3) If neither (1) or (2), then NULL
 372     //
 373     return m_pMenu;
 374 }
 375
 376 //-----------------------------------------------------------------------------
 377 // wxDockTaskBarIcon::IsIconInstalled
 378 //
 379 // Returns whether or not the dock is not using the default image
 380 //-----------------------------------------------------------------------------
 381 bool wxDockTaskBarIcon::IsIconInstalled() const
 382 {
 383     return m_iconAdded;
 384 }
 385
 386 //-----------------------------------------------------------------------------
 387 // wxDockTaskBarIcon::SetIcon
 388 //
 389 // Sets the icon for the dock CGImage functions and SetApplicationDockTileImage
 390 //-----------------------------------------------------------------------------
 391 bool wxDockTaskBarIcon::SetIcon(const wxIcon& icon, const wxString& tooltip)
 392 {
 393     // convert the wxIcon into a wxBitmap so we can perform some
 394     // wxBitmap operations with it
 395     wxBitmap bmp( icon );
 396     wxASSERT( bmp.Ok() );
 397
 398     // get the CGImageRef for the wxBitmap:
 399     // OSX builds only, but then the dock only exists in OSX
 400     CGImageRef pImage = (CGImageRef) bmp.CGImageCreate();
 401     wxASSERT( pImage != NULL );
 402
 403     // actually set the dock image
 404     OSStatus err = SetApplicationDockTileImage( pImage );
 405     verify_noerr( err );
 406
 407     // free the CGImage, now that it's referenced by the dock
 408     if (pImage != NULL)
 409         CGImageRelease( pImage );
 410
 411     bool success = (err == noErr);
 412     m_iconAdded = success;
 413
 414     return success;
 415 }
 416
 417 //-----------------------------------------------------------------------------
 418 // wxDockTaskBarIcon::RemoveIcon
 419 //
 420 // Restores the old image for the dock via RestoreApplicationDockTileImage
 421 //-----------------------------------------------------------------------------
 422 bool wxDockTaskBarIcon::RemoveIcon()
 423 {
 424     if (m_pMenu)
 425     {
 426         delete m_pMenu;
 427         m_pMenu = NULL;
 428     }
 429
 430     // restore old icon to the dock
 431     OSStatus err = RestoreApplicationDockTileImage();
 432     verify_noerr( err );
 433
 434     // restore the old menu to the dock
 435     SetApplicationDockTileMenu( m_theLastMenu );
 436
 437     bool success = (err == noErr);
 438     m_iconAdded = !success;
 439
 440     return success;
 441 }
 442
 443 //-----------------------------------------------------------------------------
 444 // wxDockTaskBarIcon::PopupMenu
 445 //
 446 // 2.4 and wxPython method that "pops of the menu in the taskbar".
 447 //
 448 // In reality because of the way the dock menu works in carbon
 449 // we just save the menu, and if the user didn't override CreatePopupMenu
 450 // return the menu passed here, thus sort of getting the same effect.
 451 //-----------------------------------------------------------------------------
 452 bool wxDockTaskBarIcon::PopupMenu(wxMenu *menu)
 453 {
 454     wxASSERT(menu != NULL);
 455
 456     if (m_pMenu)
 457         delete m_pMenu;
 458
 459     // start copy of menu
 460     m_pMenu = wxDeepCopyMenu(menu);
 461
 462     // finish up
 463     m_pMenu->SetInvokingWindow(m_menuEventWindow);
 464
 465     return true;
 466 }
 467
 468 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 469 //
 470 //  wxTaskBarIcon
 471 //
 472 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 473
 474 IMPLEMENT_DYNAMIC_CLASS(wxTaskBarIcon, wxEvtHandler)
 475
 476 //-----------------------------------------------------------------------------
 477 // wxTaskBarIcon Constructor
 478 //
 479 // Creates the backend
 480 //
 481 // Note that we only support DOCK currently as others require cocoa and
 482 // also some require hacks and other such things. (MenuExtras are
 483 // actually seperate programs that also require a special undocumented id
 484 // hack and other such fun stuff).
 485 //-----------------------------------------------------------------------------
 486 wxTaskBarIcon::wxTaskBarIcon(wxTaskBarIconType nType)
 487 {
 488     wxASSERT_MSG(
 489         nType == DOCK,
 490         wxT("Only the DOCK implementation of wxTaskBarIcon on Mac-Carbon is currently supported!") );
 491
 492     m_impl = new wxDockTaskBarIcon(this);
 493 }
 494
 495 //-----------------------------------------------------------------------------
 496 // wxTaskBarIcon Destructor
 497 //
 498 // Destroys the backend
 499 //-----------------------------------------------------------------------------
 500 wxTaskBarIcon::~wxTaskBarIcon()
 501 {
 502     delete m_impl;
 503 }
 504
 505 //-----------------------------------------------------------------------------
 506 // wxTaskBarIcon::SetIcon
 507 // wxTaskBarIcon::RemoveIcon
 508 // wxTaskBarIcon::PopupMenu
 509 //
 510 // Just calls the backend version of the said function.
 511 //-----------------------------------------------------------------------------
 512 bool wxTaskBarIcon::IsIconInstalled() const
 513 { return m_impl->IsIconInstalled(); }
 514
 515 bool wxTaskBarIcon::SetIcon(const wxIcon& icon, const wxString& tooltip)
 516 { return m_impl->SetIcon(icon, tooltip); }
 517
 518 bool wxTaskBarIcon::RemoveIcon()
 519 { return m_impl->RemoveIcon(); }
 520
 521 bool wxTaskBarIcon::PopupMenu(wxMenu *menu)
 522 { return m_impl->PopupMenu(menu); }
 523
 524 #endif // wxUSE_TASKBARICON