src/osx/cocoa/evtloop.mm

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/cocoa/evtloop.mm
   3 // Purpose:     implementation of wxEventLoop for OS X
   4 // Author:      Vadim Zeitlin, Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-01-12
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2006 Vadim Zeitlin <vadim@wxwindows.org>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // for compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/evtloop.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/app.h"
  31     #include "wx/nonownedwnd.h"
  32 #endif // WX_PRECOMP
  33
  34 #include "wx/log.h"
  35
  36 #include "wx/osx/private.h"
  37
  38 // ============================================================================
  39 // wxEventLoop implementation
  40 // ============================================================================
  41
  42 #if 0
  43
  44 // in case we want to integrate this
  45
  46 static NSUInteger CalculateNSEventMaskFromEventCategory(wxEventCategory cat)
  47 {
  48     // the masking system doesn't really help, as only the lowlevel UI events
  49     // are split in a useful way, all others are way to broad
  50
  51     if ( (cat | wxEVT_CATEGORY_USER_INPUT) && (cat | (~wxEVT_CATEGORY_USER_INPUT) ) )
  52         return NSAnyEventMask;
  53
  54     NSUInteger mask = 0;
  55
  56     if ( cat | wxEVT_CATEGORY_USER_INPUT )
  57     {
  58         mask |=
  59             NSLeftMouseDownMask |
  60             NSLeftMouseUpMask |
  61             NSRightMouseDownMask |
  62             NSRightMouseUpMask |
  63             NSMouseMovedMask |
  64             NSLeftMouseDraggedMask |
  65             NSRightMouseDraggedMask |
  66             NSMouseEnteredMask |
  67             NSMouseExitedMask |
  68             NSScrollWheelMask |
  69 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
  70             NSTabletPointMask |
  71             NSTabletProximityMask |
  72 #endif
  73             NSOtherMouseDownMask |
  74             NSOtherMouseUpMask |
  75             NSOtherMouseDraggedMask |
  76
  77             NSKeyDownMask |
  78             NSKeyUpMask |
  79             NSFlagsChangedMask |
  80 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
  81             NSEventMaskGesture |
  82             NSEventMaskMagnify |
  83             NSEventMaskSwipe |
  84             NSEventMaskRotate |
  85             NSEventMaskBeginGesture |
  86             NSEventMaskEndGesture |
  87 #endif
  88             0;
  89     }
  90
  91     if ( cat | (~wxEVT_CATEGORY_USER_INPUT) )
  92     {
  93         mask |=
  94             NSAppKitDefinedMask |
  95             NSSystemDefinedMask |
  96             NSApplicationDefinedMask |
  97             NSPeriodicMask |
  98             NSCursorUpdateMask;
  99     }
 100
 101     return mask;
 102 }
 103
 104 #endif
 105
 106 wxGUIEventLoop::wxGUIEventLoop()
 107 {
 108     m_modalSession = nil;
 109     m_dummyWindow = nil;
 110     m_modalNestedLevel = 0;
 111     m_modalWindow = NULL;
 112     m_osxLowLevelWakeUp = false;
 113 }
 114
 115 wxGUIEventLoop::~wxGUIEventLoop()
 116 {
 117     wxASSERT( m_modalSession == nil );
 118     wxASSERT( m_dummyWindow == nil );
 119     wxASSERT( m_modalNestedLevel == 0 );
 120 }
 121
 122 //-----------------------------------------------------------------------------
 123 // events dispatch and loop handling
 124 //-----------------------------------------------------------------------------
 125
 126 #if 0
 127
 128 bool wxGUIEventLoop::Pending() const
 129 {
 130 #if 0
 131     // this code doesn't reliably detect pending events
 132     // so better return true and have the dispatch deal with it
 133     // as otherwise we end up in a tight loop when idle events are responded
 134     // to by RequestMore(true)
 135     wxMacAutoreleasePool autoreleasepool;
 136
 137     return [[NSApplication sharedApplication]
 138             nextEventMatchingMask: NSAnyEventMask
 139             untilDate: nil
 140             inMode: NSDefaultRunLoopMode
 141             dequeue: NO] != nil;
 142 #else
 143     return true;
 144 #endif
 145 }
 146
 147
 148 bool wxGUIEventLoop::Dispatch()
 149 {
 150     if ( !wxTheApp )
 151         return false;
 152
 153     wxMacAutoreleasePool autoreleasepool;
 154
 155     if(NSEvent *event = [NSApp
 156                 nextEventMatchingMask:NSAnyEventMask
 157                 untilDate:[NSDate dateWithTimeIntervalSinceNow: m_sleepTime]
 158                 inMode:NSDefaultRunLoopMode
 159                 dequeue: YES])
 160     {
 161         WXEVENTREF formerEvent = wxTheApp == NULL ? NULL : wxTheApp->MacGetCurrentEvent();
 162         WXEVENTHANDLERCALLREF formerHandler = wxTheApp == NULL ? NULL : wxTheApp->MacGetCurrentEventHandlerCallRef();
 163
 164         if (wxTheApp)
 165             wxTheApp->MacSetCurrentEvent(event, NULL);
 166         m_sleepTime = 0.0;
 167         [NSApp sendEvent: event];
 168
 169         if (wxTheApp)
 170             wxTheApp->MacSetCurrentEvent(formerEvent , formerHandler);
 171     }
 172     else
 173     {
 174         if (wxTheApp)
 175             wxTheApp->ProcessPendingEvents();
 176
 177         if ( wxTheApp->ProcessIdle() )
 178             m_sleepTime = 0.0 ;
 179         else
 180         {
 181             m_sleepTime = 1.0;
 182 #if wxUSE_THREADS
 183             wxMutexGuiLeave();
 184             wxMilliSleep(20);
 185             wxMutexGuiEnter();
 186 #endif
 187         }
 188     }
 189
 190     return true;
 191 }
 192
 193 #endif
 194
 195 int wxGUIEventLoop::DoDispatchTimeout(unsigned long timeout)
 196 {
 197     wxMacAutoreleasePool autoreleasepool;
 198
 199     if ( m_modalSession )
 200     {
 201         NSInteger response = [NSApp runModalSession:(NSModalSession)m_modalSession];
 202
 203         switch (response)
 204         {
 205             case NSRunContinuesResponse:
 206             {
 207                 if ( [[NSApplication sharedApplication]
 208                         nextEventMatchingMask: NSAnyEventMask
 209                         untilDate: nil
 210                         inMode: NSDefaultRunLoopMode
 211                         dequeue: NO] != nil )
 212                     return 1;
 213
 214                 return -1;
 215             }
 216
 217             case NSRunStoppedResponse:
 218             case NSRunAbortedResponse:
 219                 return -1;
 220             default:
 221                 wxFAIL_MSG("unknown response code");
 222                 break;
 223         }
 224         return -1;
 225     }
 226     else
 227     {
 228         NSEvent *event = [NSApp
 229                     nextEventMatchingMask:NSAnyEventMask
 230                     untilDate:[NSDate dateWithTimeIntervalSinceNow: timeout/1000]
 231                     inMode:NSDefaultRunLoopMode
 232                     dequeue: YES];
 233
 234         if ( event == nil )
 235             return -1;
 236
 237         [NSApp sendEvent: event];
 238
 239         return 1;
 240     }
 241 }
 242
 243 void wxGUIEventLoop::DoRun()
 244 {
 245     wxMacAutoreleasePool autoreleasepool;
 246     [NSApp run];
 247 }
 248
 249 void wxGUIEventLoop::DoStop()
 250 {
 251     // only calling stop: is not enough when called from a runloop-observer,
 252     // therefore add a dummy event, to make sure the runloop gets another round
 253     [NSApp stop:0];
 254     WakeUp();
 255 }
 256
 257 void wxGUIEventLoop::WakeUp()
 258 {
 259     // NSEvent* cevent = [NSApp currentEvent];
 260     // NSString* mode = [[NSRunLoop mainRunLoop] currentMode];
 261
 262     // when already in a mouse event handler, don't add higher level event
 263     // if ( cevent != nil && [cevent type] <= NSMouseMoved && )
 264     if ( m_osxLowLevelWakeUp /* [NSEventTrackingRunLoopMode isEqualToString:mode] */ )
 265     {
 266         // NSLog(@"event for wakeup %@ in mode %@",cevent,mode);
 267         wxCFEventLoop::WakeUp();
 268     }
 269     else
 270     {
 271         wxMacAutoreleasePool autoreleasepool;
 272         NSEvent *event = [NSEvent otherEventWithType:NSApplicationDefined
 273                                         location:NSMakePoint(0.0, 0.0)
 274                                    modifierFlags:0
 275                                        timestamp:0
 276                                     windowNumber:0
 277                                          context:nil
 278                                          subtype:0 data1:0 data2:0];
 279         [NSApp postEvent:event atStart:FALSE];
 280     }
 281 }
 282
 283 CFRunLoopRef wxGUIEventLoop::CFGetCurrentRunLoop() const
 284 {
 285     NSRunLoop* nsloop = [NSRunLoop currentRunLoop];
 286     return [nsloop getCFRunLoop];
 287 }
 288
 289
 290 // TODO move into a evtloop_osx.cpp
 291
 292 wxModalEventLoop::wxModalEventLoop(wxWindow *modalWindow)
 293 {
 294     m_modalWindow = dynamic_cast<wxNonOwnedWindow*> (modalWindow);
 295     wxASSERT_MSG( m_modalWindow != NULL, "must pass in a toplevel window for modal event loop" );
 296     m_modalNativeWindow = m_modalWindow->GetWXWindow();
 297 }
 298
 299 wxModalEventLoop::wxModalEventLoop(WXWindow modalNativeWindow)
 300 {
 301     m_modalWindow = NULL;
 302     wxASSERT_MSG( modalNativeWindow != NULL, "must pass in a toplevel window for modal event loop" );
 303     m_modalNativeWindow = modalNativeWindow;
 304 }
 305
 306 // END move into a evtloop_osx.cpp
 307
 308 void wxModalEventLoop::DoRun()
 309 {
 310     wxMacAutoreleasePool pool;
 311
 312     // If the app hasn't started, flush the event queue
 313     // If we don't do this, the Dock doesn't get the message that
 314     // the app has started so will refuse to activate it.
 315     [NSApplication sharedApplication];
 316     if (![NSApp isRunning])
 317     {
 318         while(NSEvent *event = [NSApp nextEventMatchingMask:NSAnyEventMask untilDate:nil inMode:NSDefaultRunLoopMode dequeue:YES])
 319         {
 320             [NSApp sendEvent:event];
 321         }
 322     }
 323
 324     [NSApp runModalForWindow:m_modalNativeWindow];
 325 }
 326
 327 void wxModalEventLoop::DoStop()
 328 {
 329     [NSApp abortModal];
 330 }
 331
 332 void wxGUIEventLoop::BeginModalSession( wxWindow* modalWindow )
 333 {
 334     WXWindow nsnow = nil;
 335
 336     if ( m_modalNestedLevel > 0 )
 337     {
 338         wxASSERT_MSG( m_modalWindow == modalWindow, "Nested Modal Sessions must be based on same window");
 339         m_modalNestedLevel++;
 340         return;
 341     }
 342
 343     m_modalWindow = modalWindow;
 344     m_modalNestedLevel = 1;
 345
 346     if ( modalWindow )
 347     {
 348         // we must show now, otherwise beginModalSessionForWindow does it but it
 349         // also would do a centering of the window before overriding all our position
 350         if ( !modalWindow->IsShownOnScreen() )
 351             modalWindow->Show();
 352
 353         wxNonOwnedWindow* now = dynamic_cast<wxNonOwnedWindow*> (modalWindow);
 354         wxASSERT_MSG( now != NULL, "must pass in a toplevel window for modal event loop" );
 355         nsnow = now ? now->GetWXWindow() : nil;
 356     }
 357     else
 358     {
 359         NSRect r = NSMakeRect(10, 10, 0, 0);
 360         nsnow = [NSPanel alloc];
 361         [nsnow initWithContentRect:r
 362                                styleMask:NSBorderlessWindowMask
 363                                  backing:NSBackingStoreBuffered
 364                                    defer:YES
 365          ];
 366         [nsnow orderOut:nil];
 367         m_dummyWindow = nsnow;
 368     }
 369     m_modalSession = [NSApp beginModalSessionForWindow:nsnow];
 370     wxASSERT_MSG(m_modalSession != NULL, "modal session couldn't be started");
 371 }
 372
 373 void wxGUIEventLoop::EndModalSession()
 374 {
 375     wxASSERT_MSG(m_modalSession != NULL, "no modal session active");
 376
 377     wxASSERT_MSG(m_modalNestedLevel > 0, "incorrect modal nesting level");
 378
 379     if ( --m_modalNestedLevel == 0 )
 380     {
 381         [NSApp endModalSession:(NSModalSession)m_modalSession];
 382         m_modalSession = nil;
 383         if ( m_dummyWindow )
 384         {
 385             [m_dummyWindow release];
 386             m_dummyWindow = nil;
 387         }
 388     }
 389 }
 390
 391 //
 392 //
 393 //
 394
 395 wxWindowDisabler::wxWindowDisabler(bool disable)
 396 {
 397     m_modalEventLoop = NULL;
 398     m_disabled = disable;
 399     if ( disable )
 400         DoDisable();
 401 }
 402
 403 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
 404 {
 405     m_disabled = true;
 406     DoDisable(winToSkip);
 407 }
 408
 409 void wxWindowDisabler::DoDisable(wxWindow *winToSkip)
 410 {
 411     // remember the top level windows which were already disabled, so that we
 412     // don't reenable them later
 413     m_winDisabled = NULL;
 414
 415     wxWindowList::compatibility_iterator node;
 416     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 417     {
 418         wxWindow *winTop = node->GetData();
 419         if ( winTop == winToSkip )
 420             continue;
 421
 422         // we don't need to disable the hidden or already disabled windows
 423         if ( winTop->IsEnabled() && winTop->IsShown() )
 424         {
 425             winTop->Disable();
 426         }
 427         else
 428         {
 429             if ( !m_winDisabled )
 430             {
 431                 m_winDisabled = new wxWindowList;
 432             }
 433
 434             m_winDisabled->Append(winTop);
 435         }
 436     }
 437
 438     m_modalEventLoop = (wxEventLoop*)wxEventLoopBase::GetActive();
 439     if (m_modalEventLoop)
 440         m_modalEventLoop->BeginModalSession(winToSkip);
 441 }
 442
 443 wxWindowDisabler::~wxWindowDisabler()
 444 {
 445     if ( !m_disabled )
 446         return;
 447
 448     if (m_modalEventLoop)
 449         m_modalEventLoop->EndModalSession();
 450
 451     wxWindowList::compatibility_iterator node;
 452     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 453     {
 454         wxWindow *winTop = node->GetData();
 455         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
 456         {
 457             winTop->Enable();
 458         }
 459         //else: had been already disabled, don't reenable
 460     }
 461
 462     delete m_winDisabled;
 463 }