src/cocoa/evtloop.mm

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        cocoa/evtloop.mm
   3 // Purpose:     implements wxEventLoop for Cocoa
   4 // Author:      David Elliott
   5 // Modified by:
   6 // Created:     2003/10/02
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 David Elliott <dfe@cox.net>
   9 // License:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13 #ifndef WX_PRECOMP
  14     #include "wx/log.h"
  15 #endif //WX_PRECOMP
  16
  17 #include "wx/evtloop.h"
  18
  19 #import <AppKit/NSApplication.h>
  20 #import <AppKit/NSEvent.h>
  21 #import <Foundation/NSRunLoop.h>
  22
  23 // ========================================================================
  24 // wxEventLoopImpl
  25 // ========================================================================
  26
  27 class WXDLLEXPORT wxEventLoopImpl
  28 {
  29 public:
  30     // ctor
  31     wxEventLoopImpl() { SetExitCode(0); }
  32
  33     // set/get the exit code
  34     void SetExitCode(int exitcode) { m_exitcode = exitcode; }
  35     int GetExitCode() const { return m_exitcode; }
  36
  37 private:
  38     // the exit code of the event loop
  39     int m_exitcode;
  40 };
  41
  42 // ========================================================================
  43 // wxEventLoop
  44 // ========================================================================
  45
  46 // ----------------------------------------------------------------------------
  47 // wxEventLoop running and exiting
  48 // ----------------------------------------------------------------------------
  49
  50 wxEventLoop *wxEventLoop::ms_activeLoop = NULL;
  51
  52 wxEventLoop::~wxEventLoop()
  53 {
  54     wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") );
  55 }
  56
  57 bool wxEventLoop::IsRunning() const
  58 {
  59     return m_impl;
  60 }
  61
  62 int wxEventLoop::Run()
  63 {
  64     // event loops are not recursive, you need to create another loop!
  65     wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") );
  66
  67     wxEventLoop *oldLoop = ms_activeLoop;
  68     ms_activeLoop = this;
  69
  70     m_impl = new wxEventLoopImpl;
  71
  72     [[NSApplication sharedApplication] run];
  73
  74     int exitcode = m_impl->GetExitCode();
  75     delete m_impl;
  76     m_impl = NULL;
  77
  78     ms_activeLoop = oldLoop;
  79
  80     return exitcode;
  81 }
  82
  83 void wxEventLoop::Exit(int rc)
  84 {
  85     wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
  86
  87     m_impl->SetExitCode(rc);
  88
  89     NSApplication *cocoaApp = [NSApplication sharedApplication];
  90     wxLogDebug("wxEventLoop::Exit isRunning=%d", (int)[cocoaApp isRunning]);
  91     [cocoaApp stop: cocoaApp];
  92 }
  93
  94 // ----------------------------------------------------------------------------
  95 // wxEventLoop message processing dispatching
  96 // ----------------------------------------------------------------------------
  97
  98 bool wxEventLoop::Pending() const
  99 {
 100     // a pointer to the event is returned if there is one, or nil if not
 101     return [[NSApplication sharedApplication]
 102             nextEventMatchingMask: NSAnyEventMask
 103             untilDate: nil /* Equivalent to [NSDate distantPast] */
 104             inMode: NSDefaultRunLoopMode
 105             dequeue: NO];
 106 }
 107
 108 bool wxEventLoop::Dispatch()
 109 {
 110     // This check is required by wxGTK but probably not really for wxCocoa
 111     // Keep it here to encourage developers to write cross-platform code
 112     wxCHECK_MSG( IsRunning(), false, _T("can't call Dispatch() if not running") );
 113     NSApplication *cocoaApp = [NSApplication sharedApplication];
 114     // Block to retrieve an event then send it
 115     if(NSEvent *event = [cocoaApp
 116                 nextEventMatchingMask:NSAnyEventMask
 117                 untilDate:[NSDate distantFuture]
 118                 inMode:NSDefaultRunLoopMode
 119                 dequeue: YES])
 120     {
 121         [cocoaApp sendEvent: event];
 122         return true;
 123     }
 124     return false;
 125 }
 126