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 }
 113
 114 wxGUIEventLoop::~wxGUIEventLoop()
 115 {
 116     wxASSERT( m_modalSession == nil );
 117     wxASSERT( m_dummyWindow == nil );
 118     wxASSERT( m_modalNestedLevel == 0 );
 119 }
 120
 121 //-----------------------------------------------------------------------------
 122 // events dispatch and loop handling
 123 //-----------------------------------------------------------------------------
 124
 125 #if 0
 126
 127 bool wxGUIEventLoop::Pending() const
 128 {
 129 #if 0
 130     // this code doesn't reliably detect pending events
 131     // so better return true and have the dispatch deal with it
 132     // as otherwise we end up in a tight loop when idle events are responded
 133     // to by RequestMore(true)
 134     wxMacAutoreleasePool autoreleasepool;
 135
 136     return [[NSApplication sharedApplication]
 137             nextEventMatchingMask: NSAnyEventMask
 138             untilDate: nil
 139             inMode: NSDefaultRunLoopMode
 140             dequeue: NO] != nil;
 141 #else
 142     return true;
 143 #endif
 144 }
 145
 146 bool wxGUIEventLoop::Dispatch()
 147 {
 148     if ( !wxTheApp )
 149         return false;
 150
 151     wxMacAutoreleasePool autoreleasepool;
 152
 153     if(NSEvent *event = [NSApp
 154                 nextEventMatchingMask:NSAnyEventMask
 155                 untilDate:[NSDate dateWithTimeIntervalSinceNow: m_sleepTime]
 156                 inMode:NSDefaultRunLoopMode
 157                 dequeue: YES])
 158     {
 159         WXEVENTREF formerEvent = wxTheApp == NULL ? NULL : wxTheApp->MacGetCurrentEvent();
 160         WXEVENTHANDLERCALLREF formerHandler = wxTheApp == NULL ? NULL : wxTheApp->MacGetCurrentEventHandlerCallRef();
 161
 162         if (wxTheApp)
 163             wxTheApp->MacSetCurrentEvent(event, NULL);
 164         m_sleepTime = 0.0;
 165         [NSApp sendEvent: event];
 166
 167         if (wxTheApp)
 168             wxTheApp->MacSetCurrentEvent(formerEvent , formerHandler);
 169     }
 170     else
 171     {
 172         if (wxTheApp)
 173             wxTheApp->ProcessPendingEvents();
 174
 175         if ( wxTheApp->ProcessIdle() )
 176             m_sleepTime = 0.0 ;
 177         else
 178         {
 179             m_sleepTime = 1.0;
 180 #if wxUSE_THREADS
 181             wxMutexGuiLeave();
 182             wxMilliSleep(20);
 183             wxMutexGuiEnter();
 184 #endif
 185         }
 186     }
 187
 188     return true;
 189 }
 190
 191 #endif
 192
 193 int wxGUIEventLoop::DoDispatchTimeout(unsigned long timeout)
 194 {
 195     wxMacAutoreleasePool autoreleasepool;
 196
 197     if ( m_modalSession )
 198     {
 199         NSInteger response = [NSApp runModalSession:(NSModalSession)m_modalSession];
 200
 201         switch (response)
 202         {
 203             case NSRunContinuesResponse:
 204             {
 205                 if ( [[NSApplication sharedApplication]
 206                         nextEventMatchingMask: NSAnyEventMask
 207                         untilDate: nil
 208                         inMode: NSDefaultRunLoopMode
 209                         dequeue: NO] != nil )
 210                     return 1;
 211
 212                 return -1;
 213             }
 214
 215             case NSRunStoppedResponse:
 216             case NSRunAbortedResponse:
 217                 return -1;
 218             default:
 219                 wxFAIL_MSG("unknown response code");
 220                 break;
 221         }
 222         return -1;
 223     }
 224     else
 225     {
 226         NSEvent *event = [NSApp
 227                     nextEventMatchingMask:NSAnyEventMask
 228                     untilDate:[NSDate dateWithTimeIntervalSinceNow: timeout/1000]
 229                     inMode:NSDefaultRunLoopMode
 230                     dequeue: YES];
 231
 232         if ( event == nil )
 233             return -1;
 234
 235         [NSApp sendEvent: event];
 236
 237         return 1;
 238     }
 239 }
 240
 241 void wxGUIEventLoop::DoRun()
 242 {
 243     wxMacAutoreleasePool autoreleasepool;
 244     [NSApp run];
 245 }
 246
 247 void wxGUIEventLoop::DoStop()
 248 {
 249     [NSApp stop:0];
 250     // only calling stop: is not enough when called from a runloop-observer,
 251     // therefore add a dummy event, to make sure the runloop gets another round
 252     NSEvent *event = [NSEvent otherEventWithType:NSApplicationDefined
 253                                         location:NSMakePoint(0.0, 0.0)
 254                                    modifierFlags:0
 255                                        timestamp:0
 256                                     windowNumber:0
 257                                          context:nil
 258                                          subtype:0 data1:0 data2:0];
 259     [NSApp postEvent:event atStart:FALSE];
 260 }
 261
 262 CFRunLoopRef wxGUIEventLoop::CFGetCurrentRunLoop() const
 263 {
 264     NSRunLoop* nsloop = [NSRunLoop currentRunLoop];
 265     return [nsloop getCFRunLoop];
 266 }
 267
 268
 269 // TODO move into a evtloop_osx.cpp
 270
 271 wxModalEventLoop::wxModalEventLoop(wxWindow *modalWindow)
 272 {
 273     m_modalWindow = dynamic_cast<wxNonOwnedWindow*> (modalWindow);
 274     wxASSERT_MSG( m_modalWindow != NULL, "must pass in a toplevel window for modal event loop" );
 275     m_modalNativeWindow = m_modalWindow->GetWXWindow();
 276 }
 277
 278 wxModalEventLoop::wxModalEventLoop(WXWindow modalNativeWindow)
 279 {
 280     m_modalWindow = NULL;
 281     wxASSERT_MSG( modalNativeWindow != NULL, "must pass in a toplevel window for modal event loop" );
 282     m_modalNativeWindow = modalNativeWindow;
 283 }
 284
 285 // END move into a evtloop_osx.cpp
 286
 287 void wxModalEventLoop::DoRun()
 288 {
 289     wxMacAutoreleasePool pool;
 290
 291     // If the app hasn't started, flush the event queue
 292     // If we don't do this, the Dock doesn't get the message that
 293     // the app has started so will refuse to activate it.
 294     [NSApplication sharedApplication];
 295     if (![NSApp isRunning])
 296     {
 297         while(NSEvent *event = [NSApp nextEventMatchingMask:NSAnyEventMask untilDate:nil inMode:NSDefaultRunLoopMode dequeue:YES])
 298         {
 299             [NSApp sendEvent:event];
 300         }
 301     }
 302
 303     [NSApp runModalForWindow:m_modalNativeWindow];
 304 }
 305
 306 void wxModalEventLoop::DoStop()
 307 {
 308     [NSApp stopModal];
 309 }
 310
 311 void wxGUIEventLoop::BeginModalSession( wxWindow* modalWindow )
 312 {
 313     WXWindow nsnow = nil;
 314
 315     if ( m_modalNestedLevel > 0 )
 316     {
 317         wxASSERT_MSG( m_modalWindow == modalWindow, "Nested Modal Sessions must be based on same window");
 318         m_modalNestedLevel++;
 319         return;
 320     }
 321
 322     m_modalWindow = modalWindow;
 323     m_modalNestedLevel = 1;
 324
 325     if ( modalWindow )
 326     {
 327         // we must show now, otherwise beginModalSessionForWindow does it but it
 328         // also would do a centering of the window before overriding all our position
 329         if ( !modalWindow->IsShownOnScreen() )
 330             modalWindow->Show();
 331
 332         wxNonOwnedWindow* now = dynamic_cast<wxNonOwnedWindow*> (modalWindow);
 333         wxASSERT_MSG( now != NULL, "must pass in a toplevel window for modal event loop" );
 334         nsnow = now ? now->GetWXWindow() : nil;
 335     }
 336     else
 337     {
 338         NSRect r = NSMakeRect(10, 10, 0, 0);
 339         nsnow = [NSPanel alloc];
 340         [nsnow initWithContentRect:r
 341                                styleMask:NSBorderlessWindowMask
 342                                  backing:NSBackingStoreBuffered
 343                                    defer:YES
 344          ];
 345         [nsnow orderOut:nil];
 346         m_dummyWindow = nsnow;
 347     }
 348     m_modalSession = [NSApp beginModalSessionForWindow:nsnow];
 349     wxASSERT_MSG(m_modalSession != NULL, "modal session couldn't be started");
 350 }
 351
 352 void wxGUIEventLoop::EndModalSession()
 353 {
 354     wxASSERT_MSG(m_modalSession != NULL, "no modal session active");
 355
 356     wxASSERT_MSG(m_modalNestedLevel > 0, "incorrect modal nesting level");
 357
 358     if ( --m_modalNestedLevel == 0 )
 359     {
 360         [NSApp endModalSession:(NSModalSession)m_modalSession];
 361         m_modalSession = nil;
 362         if ( m_dummyWindow )
 363         {
 364             [m_dummyWindow release];
 365             m_dummyWindow = nil;
 366         }
 367     }
 368 }
 369
 370 //
 371 //
 372 //
 373
 374 wxWindowDisabler::wxWindowDisabler(bool disable)
 375 {
 376     m_modalEventLoop = NULL;
 377     m_disabled = disable;
 378     if ( disable )
 379         DoDisable();
 380 }
 381
 382 wxWindowDisabler::wxWindowDisabler(wxWindow *winToSkip)
 383 {
 384     m_disabled = true;
 385     DoDisable(winToSkip);
 386 }
 387
 388 void wxWindowDisabler::DoDisable(wxWindow *winToSkip)
 389 {
 390     // remember the top level windows which were already disabled, so that we
 391     // don't reenable them later
 392     m_winDisabled = NULL;
 393
 394     wxWindowList::compatibility_iterator node;
 395     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 396     {
 397         wxWindow *winTop = node->GetData();
 398         if ( winTop == winToSkip )
 399             continue;
 400
 401         // we don't need to disable the hidden or already disabled windows
 402         if ( winTop->IsEnabled() && winTop->IsShown() )
 403         {
 404             winTop->Disable();
 405         }
 406         else
 407         {
 408             if ( !m_winDisabled )
 409             {
 410                 m_winDisabled = new wxWindowList;
 411             }
 412
 413             m_winDisabled->Append(winTop);
 414         }
 415     }
 416
 417     m_modalEventLoop = (wxEventLoop*)wxEventLoopBase::GetActive();
 418     m_modalEventLoop->BeginModalSession(winToSkip);
 419 }
 420
 421 wxWindowDisabler::~wxWindowDisabler()
 422 {
 423     if ( !m_disabled )
 424         return;
 425
 426     m_modalEventLoop->EndModalSession();
 427
 428     wxWindowList::compatibility_iterator node;
 429     for ( node = wxTopLevelWindows.GetFirst(); node; node = node->GetNext() )
 430     {
 431         wxWindow *winTop = node->GetData();
 432         if ( !m_winDisabled || !m_winDisabled->Find(winTop) )
 433         {
 434             winTop->Enable();
 435         }
 436         //else: had been already disabled, don't reenable
 437     }
 438
 439     delete m_winDisabled;
 440 }
 441