| 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: wxWidgets licence |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #include "wx/wxprec.h" |
| 13 | #ifndef WX_PRECOMP |
| 14 | #include "wx/log.h" |
| 15 | #include "wx/app.h" |
| 16 | #endif //WX_PRECOMP |
| 17 | |
| 18 | #include "wx/evtloop.h" |
| 19 | |
| 20 | #import <AppKit/NSApplication.h> |
| 21 | #import <AppKit/NSEvent.h> |
| 22 | #import <Foundation/NSRunLoop.h> |
| 23 | |
| 24 | // ======================================================================== |
| 25 | // wxEventLoopImpl |
| 26 | // ======================================================================== |
| 27 | |
| 28 | class WXDLLEXPORT wxEventLoopImpl |
| 29 | { |
| 30 | public: |
| 31 | // ctor |
| 32 | wxEventLoopImpl() { SetExitCode(0); } |
| 33 | |
| 34 | // set/get the exit code |
| 35 | void SetExitCode(int exitcode) { m_exitcode = exitcode; } |
| 36 | int GetExitCode() const { return m_exitcode; } |
| 37 | |
| 38 | private: |
| 39 | // the exit code of the event loop |
| 40 | int m_exitcode; |
| 41 | }; |
| 42 | |
| 43 | // ======================================================================== |
| 44 | // wxEventLoop |
| 45 | // ======================================================================== |
| 46 | |
| 47 | // ---------------------------------------------------------------------------- |
| 48 | // wxEventLoop running and exiting |
| 49 | // ---------------------------------------------------------------------------- |
| 50 | |
| 51 | wxEventLoop *wxEventLoopBase::ms_activeLoop = NULL; |
| 52 | |
| 53 | wxEventLoop::~wxEventLoop() |
| 54 | { |
| 55 | wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") ); |
| 56 | } |
| 57 | |
| 58 | int wxEventLoop::Run() |
| 59 | { |
| 60 | // event loops are not recursive, you need to create another loop! |
| 61 | wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") ); |
| 62 | |
| 63 | wxEventLoop *oldLoop = ms_activeLoop; |
| 64 | ms_activeLoop = this; |
| 65 | |
| 66 | m_impl = new wxEventLoopImpl; |
| 67 | |
| 68 | [[NSApplication sharedApplication] run]; |
| 69 | |
| 70 | int exitcode = m_impl->GetExitCode(); |
| 71 | delete m_impl; |
| 72 | m_impl = NULL; |
| 73 | |
| 74 | ms_activeLoop = oldLoop; |
| 75 | |
| 76 | return exitcode; |
| 77 | } |
| 78 | |
| 79 | void wxEventLoop::Exit(int rc) |
| 80 | { |
| 81 | wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") ); |
| 82 | |
| 83 | m_impl->SetExitCode(rc); |
| 84 | |
| 85 | NSApplication *cocoaApp = [NSApplication sharedApplication]; |
| 86 | wxLogTrace(wxTRACE_COCOA,wxT("wxEventLoop::Exit isRunning=%d"), (int)[cocoaApp isRunning]); |
| 87 | wxTheApp->WakeUpIdle(); |
| 88 | /* Notes: |
| 89 | If we're being called from idle time (which occurs while checking the |
| 90 | queue for new events) there may or may not be any events in the queue. |
| 91 | In order to successfully stop the event loop, at least one event must |
| 92 | be processed. To ensure this always happens, WakeUpIdle is called. |
| 93 | |
| 94 | If the application was active when closed then this is unnecessary |
| 95 | because it would receive a deactivate event anyway. However, if the |
| 96 | application was not active when closed, then no events would be |
| 97 | added to the queue by Cocoa and thus the application would wait |
| 98 | indefinitely for the next event. |
| 99 | */ |
| 100 | [cocoaApp stop: cocoaApp]; |
| 101 | } |
| 102 | |
| 103 | // ---------------------------------------------------------------------------- |
| 104 | // wxEventLoop message processing dispatching |
| 105 | // ---------------------------------------------------------------------------- |
| 106 | |
| 107 | bool wxEventLoop::Pending() const |
| 108 | { |
| 109 | // a pointer to the event is returned if there is one, or nil if not |
| 110 | return [[NSApplication sharedApplication] |
| 111 | nextEventMatchingMask: NSAnyEventMask |
| 112 | untilDate: nil /* Equivalent to [NSDate distantPast] */ |
| 113 | inMode: NSDefaultRunLoopMode |
| 114 | dequeue: NO]; |
| 115 | } |
| 116 | |
| 117 | bool wxEventLoop::Dispatch() |
| 118 | { |
| 119 | // This check is required by wxGTK but probably not really for wxCocoa |
| 120 | // Keep it here to encourage developers to write cross-platform code |
| 121 | wxCHECK_MSG( IsRunning(), false, _T("can't call Dispatch() if not running") ); |
| 122 | NSApplication *cocoaApp = [NSApplication sharedApplication]; |
| 123 | // Block to retrieve an event then send it |
| 124 | if(NSEvent *event = [cocoaApp |
| 125 | nextEventMatchingMask:NSAnyEventMask |
| 126 | untilDate:[NSDate distantFuture] |
| 127 | inMode:NSDefaultRunLoopMode |
| 128 | dequeue: YES]) |
| 129 | { |
| 130 | [cocoaApp sendEvent: event]; |
| 131 | return true; |
| 132 | } |
| 133 | return false; |
| 134 | } |
| 135 | |