Add some version checks to help compiling on OSX.

[wxWidgets.git] / src / gtk / evtloop.cpp

diff --git a/src/gtk/evtloop.cpp b/src/gtk/evtloop.cpp
index 74d4132b432737bc1b6be2efa7d14010488fbca2..a35be35ab07617dcf738d3ef060a10686cef7877 100644 (file)
--- a/src/gtk/evtloop.cpp
+++ b/src/gtk/evtloop.cpp
@@ -1,12 +1,12 @@
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////

-// Name:        gtk/evtloop.cpp
+// Name:        src/gtk/evtloop.cpp

 // Purpose:     implements wxEventLoop for GTK+
 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     10.07.01
 // RCS-ID:      $Id$
 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
 // Purpose:     implements wxEventLoop for GTK+
 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     10.07.01
 // RCS-ID:      $Id$
 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>

-// License:     wxWindows licence
+// Licence:     wxWindows licence

 ///////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================
 ///////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================


@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "evtloop.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -28,104 +24,351 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

-#ifndef WX_PRECOMP
-#endif //WX_PRECOMP
-
-#include "wx/app.h"

 #include "wx/evtloop.h"
 #include "wx/evtloop.h"

+#include "wx/evtloopsrc.h"
+
+#ifndef WX_PRECOMP
+    #include "wx/app.h"
+    #include "wx/log.h"
+#endif // WX_PRECOMP

 
 #include <gtk/gtk.h>
 
 #include <gtk/gtk.h>

+#include <glib.h>
+
+// ============================================================================
+// wxEventLoop implementation
+// ============================================================================
+
+extern GtkWidget *wxGetRootWindow();

 
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------

-// wxEventLoopImpl
+// wxEventLoop running and exiting

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-class WXDLLEXPORT wxEventLoopImpl
+wxGUIEventLoop::wxGUIEventLoop()

 {
 {

-public:
-    // ctor
-    wxEventLoopImpl() { SetExitCode(0); }
+    m_exitcode = 0;
+}

 
 

-    // set/get the exit code
-    void SetExitCode(int exitcode) { m_exitcode = exitcode; }
-    int GetExitCode() const { return m_exitcode; }
+int wxGUIEventLoop::Run()
+{
+    // event loops are not recursive, you need to create another loop!
+    wxCHECK_MSG( !IsRunning(), -1, "can't reenter a message loop" );

 
 

-private:
-    // the exit code of the event loop
-    int m_exitcode;
-};
+    wxEventLoopActivator activate(this);

 
 

-// ============================================================================
-// wxEventLoop implementation
-// ============================================================================
+    gtk_main();

 
 

-// ----------------------------------------------------------------------------
-// wxEventLoop running and exiting
-// ----------------------------------------------------------------------------
+    OnExit();

 
 

-wxEventLoop *wxEventLoopBase::ms_activeLoop = NULL;
+    return m_exitcode;
+}

 
 

-wxEventLoop::~wxEventLoop()
+void wxGUIEventLoop::Exit(int rc)

 {
 {

-    wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") );
+    wxCHECK_RET( IsRunning(), "can't call Exit() if not running" );
+
+    m_exitcode = rc;
+
+    gtk_main_quit();

 }
 
 }
 

-int wxEventLoop::Run()
+void wxGUIEventLoop::WakeUp()

 {
 {

-    // event loops are not recursive, you need to create another loop!
-    wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") );
+    // TODO: idle events handling should really be done by wxEventLoop itself
+    //       but for now it's completely in gtk/app.cpp so just call there when
+    //       we have wxTheApp and hope that it doesn't matter that we do
+    //       nothing when we don't...
+    if ( wxTheApp )
+        wxTheApp->WakeUpIdle();
+}

 
 

-    wxEventLoop *oldLoop = ms_activeLoop;
-    ms_activeLoop = this;
+// ----------------------------------------------------------------------------
+// wxEventLoop adding & removing sources
+// ----------------------------------------------------------------------------

 
 

-    m_impl = new wxEventLoopImpl;
+#if wxUSE_EVENTLOOP_SOURCE

 
 

-    gtk_main();
+extern "C"
+{
+static gboolean wx_on_channel_event(GIOChannel *channel,
+                                    GIOCondition condition,
+                                    gpointer data)
+{
+    wxUnusedVar(channel); // Unused if !wxUSE_LOG || !wxDEBUG_LEVEL
+
+    wxLogTrace(wxTRACE_EVT_SOURCE,
+               "wx_on_channel_event, fd=%d, condition=%08x",
+               g_io_channel_unix_get_fd(channel), condition);

 
 

-    int exitcode = m_impl->GetExitCode();
-    delete m_impl;
-    m_impl = NULL;
+    wxEventLoopSourceHandler * const
+        handler = static_cast<wxEventLoopSourceHandler *>(data);

 
 

-    ms_activeLoop = oldLoop;
+    if (condition & G_IO_IN || condition & G_IO_PRI)
+        handler->OnReadWaiting();
+    if (condition & G_IO_OUT)
+        handler->OnWriteWaiting();
+    else if (condition & G_IO_ERR || condition & G_IO_NVAL)
+        handler->OnExceptionWaiting();

 
 

-    return exitcode;
+    // we never want to remove source here, so always return true
+    return TRUE;
+}

 }
 
 }
 

-void wxEventLoop::Exit(int rc)
+wxEventLoopSource *
+wxGUIEventLoop::AddSourceForFD(int fd,
+                               wxEventLoopSourceHandler *handler,
+                               int flags)

 {
 {

-    wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
+    wxCHECK_MSG( fd != -1, NULL, "can't monitor invalid fd" );
+
+    int condition = 0;
+    if (flags & wxEVENT_SOURCE_INPUT)
+        condition |= G_IO_IN | G_IO_PRI;
+    if (flags & wxEVENT_SOURCE_OUTPUT)
+        condition |= G_IO_OUT;
+    if (flags & wxEVENT_SOURCE_EXCEPTION)
+        condition |= G_IO_ERR | G_IO_HUP | G_IO_NVAL;
+
+    GIOChannel* channel = g_io_channel_unix_new(fd);
+    const unsigned sourceId  = g_io_add_watch
+                               (
+                                channel,
+                                (GIOCondition)condition,
+                                &wx_on_channel_event,
+                                handler
+                               );
+    // it was ref'd by g_io_add_watch() so we can unref it here
+    g_io_channel_unref(channel);
+
+    if ( !sourceId )
+        return NULL;
+
+    wxLogTrace(wxTRACE_EVT_SOURCE,
+               "Adding event loop source for fd=%d with GTK id=%u",
+               fd, sourceId);
+
+
+    return new wxGTKEventLoopSource(sourceId, handler, flags);
+}

 
 

-    m_impl->SetExitCode(rc);
+wxGTKEventLoopSource::~wxGTKEventLoopSource()
+{
+    wxLogTrace(wxTRACE_EVT_SOURCE,
+               "Removing event loop source with GTK id=%u", m_sourceId);

 
 

-    gtk_main_quit();
+    g_source_remove(m_sourceId);

 }
 
 }
 

+#endif // wxUSE_EVENTLOOP_SOURCE
+

 // ----------------------------------------------------------------------------
 // wxEventLoop message processing dispatching
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // wxEventLoop message processing dispatching
 // ----------------------------------------------------------------------------
 

-extern bool g_isIdle;
-
-bool wxEventLoop::Pending() const
+bool wxGUIEventLoop::Pending() const

 {
 {

-    if (wxTheApp && !g_isIdle)
+    if ( wxTheApp )

     {
     {

-        // We need to remove idle callbacks or gtk_events_pending will
-        // never return false.
-        gtk_idle_remove( wxTheApp->m_idleTag );
-        wxTheApp->m_idleTag = 0;
-        g_isIdle = TRUE;
+        // this avoids false positives from our idle source
+        return wxTheApp->EventsPending();

     }
 
     }
 

-    return gtk_events_pending();
+    return gtk_events_pending() != 0;
+}
+
+bool wxGUIEventLoop::Dispatch()
+{
+    wxCHECK_MSG( IsRunning(), false, wxT("can't call Dispatch() if not running") );
+
+    // gtk_main_iteration() returns TRUE only if gtk_main_quit() was called
+    return !gtk_main_iteration();

 }
 
 }
 

-bool wxEventLoop::Dispatch()
+extern "C" {
+static gboolean wx_event_loop_timeout(void* data)

 {
 {

-    wxCHECK_MSG( IsRunning(), FALSE, _T("can't call Dispatch() if not running") );
+    bool* expired = static_cast<bool*>(data);
+    *expired = true;

 
 

-    gtk_main_iteration();
+    // return FALSE to remove this timeout
+    return FALSE;
+}
+}

 
 

-    return TRUE;
+int wxGUIEventLoop::DispatchTimeout(unsigned long timeout)
+{
+    bool expired = false;
+    const unsigned id = g_timeout_add(timeout, wx_event_loop_timeout, &expired);
+    bool quit = gtk_main_iteration() != 0;
+
+    if ( expired )
+        return -1;
+
+    g_source_remove(id);
+
+    return !quit;
+}
+
+//-----------------------------------------------------------------------------
+// YieldFor
+//-----------------------------------------------------------------------------
+
+extern "C" {
+static void wxgtk_main_do_event(GdkEvent* event, void* data)
+{
+    // categorize the GDK event according to wxEventCategory.
+    // See http://library.gnome.org/devel/gdk/unstable/gdk-Events.html#GdkEventType
+    // for more info.
+
+    // NOTE: GDK_* constants which were not present in the GDK2.0 can be tested for
+    //       only at compile-time; when running the program (compiled with a recent GDK)
+    //       on a system with an older GDK lib we can be sure there won't be problems
+    //       because event->type will never assume those values corresponding to
+    //       new event types (since new event types are always added in GDK with non
+    //       conflicting values for ABI compatibility).
+
+    wxEventCategory cat = wxEVT_CATEGORY_UNKNOWN;
+    switch (event->type)
+    {
+    case GDK_SELECTION_REQUEST:
+    case GDK_SELECTION_NOTIFY:
+    case GDK_SELECTION_CLEAR:
+#if GTK_CHECK_VERSION(2,6,0)
+    case GDK_OWNER_CHANGE:
+#endif
+        cat = wxEVT_CATEGORY_CLIPBOARD;
+        break;
+
+    case GDK_KEY_PRESS:
+    case GDK_KEY_RELEASE:
+    case GDK_BUTTON_PRESS:
+    case GDK_2BUTTON_PRESS:
+    case GDK_3BUTTON_PRESS:
+    case GDK_BUTTON_RELEASE:
+    case GDK_SCROLL:        // generated from mouse buttons
+    case GDK_CLIENT_EVENT:
+        cat = wxEVT_CATEGORY_USER_INPUT;
+        break;
+
+    case GDK_PROXIMITY_IN:
+    case GDK_PROXIMITY_OUT:
+
+    case GDK_MOTION_NOTIFY:
+    case GDK_ENTER_NOTIFY:
+    case GDK_LEAVE_NOTIFY:
+    case GDK_VISIBILITY_NOTIFY:
+    case GDK_PROPERTY_NOTIFY:
+
+    case GDK_FOCUS_CHANGE:
+    case GDK_CONFIGURE:
+    case GDK_WINDOW_STATE:
+    case GDK_SETTING:
+    case GDK_DELETE:
+    case GDK_DESTROY:
+
+    case GDK_EXPOSE:
+    case GDK_NO_EXPOSE:
+    case GDK_MAP:
+    case GDK_UNMAP:
+
+    case GDK_DRAG_ENTER:
+    case GDK_DRAG_LEAVE:
+    case GDK_DRAG_MOTION:
+    case GDK_DRAG_STATUS:
+    case GDK_DROP_START:
+    case GDK_DROP_FINISHED:
+#if GTK_CHECK_VERSION(2,8,0)
+    case GDK_GRAB_BROKEN:
+#endif
+#if GTK_CHECK_VERSION(2,14,0)
+    case GDK_DAMAGE:
+#endif
+        cat = wxEVT_CATEGORY_UI;
+        break;
+
+    default:
+        cat = wxEVT_CATEGORY_UNKNOWN;
+        break;
+    }
+
+    wxGUIEventLoop* evtloop = static_cast<wxGUIEventLoop*>(data);
+
+    // is this event allowed now?
+    if (evtloop->IsEventAllowedInsideYield(cat))
+        gtk_main_do_event(event);         // process it now
+    else if (event->type != GDK_NOTHING)
+        evtloop->StoreGdkEventForLaterProcessing(gdk_event_copy(event));
+            // process it later (but make a copy; the caller will free the event pointer)
+}

 }
 
 }
 

+bool wxGUIEventLoop::YieldFor(long eventsToProcess)
+{
+#if wxUSE_THREADS
+    if ( !wxThread::IsMain() )
+    {
+        // can't call gtk_main_iteration() from other threads like this
+        return true;
+    }
+#endif // wxUSE_THREADS
+
+    m_isInsideYield = true;
+    m_eventsToProcessInsideYield = eventsToProcess;
+
+#if wxUSE_LOG
+    // disable log flushing from here because a call to wxYield() shouldn't
+    // normally result in message boxes popping up &c
+    wxLog::Suspend();
+#endif
+
+    // temporarily replace the global GDK event handler with our function, which
+    // categorizes the events and using m_eventsToProcessInsideYield decides
+    // if an event should be processed immediately or not
+    // NOTE: this approach is better than using gdk_display_get_event() because
+    //       gtk_main_iteration() does more than just calling gdk_display_get_event()
+    //       and then call gtk_main_do_event()!
+    //       In particular in this way we also process input from sources like
+    //       GIOChannels (this is needed for e.g. wxGUIAppTraits::WaitForChild).
+    gdk_event_handler_set(wxgtk_main_do_event, this, NULL);
+    while (Pending())   // avoid false positives from our idle source
+        gtk_main_iteration();
+    gdk_event_handler_set ((GdkEventFunc)gtk_main_do_event, NULL, NULL);
+
+    if (eventsToProcess != wxEVT_CATEGORY_CLIPBOARD)
+    {
+        // It's necessary to call ProcessIdle() to update the frames sizes which
+        // might have been changed (it also will update other things set from
+        // OnUpdateUI() which is a nice (and desired) side effect). But we
+        // call ProcessIdle() only once since this is not meant for longish
+        // background jobs (controlled by wxIdleEvent::RequestMore() and the
+        // return value of Processidle().
+        ProcessIdle();      // ProcessIdle() also calls ProcessPendingEvents()
+    }
+    //else: if we are inside ~wxClipboardSync() and we call ProcessIdle() and
+    //      the user app contains an UI update handler which calls wxClipboard::IsSupported,
+    //      then we fall into a never-ending loop...
+
+    // put all unprocessed GDK events back in the queue
+    GdkDisplay* disp = gtk_widget_get_display(wxGetRootWindow());
+    for (size_t i=0; i<m_arrGdkEvents.GetCount(); i++)
+    {
+        GdkEvent* ev = (GdkEvent*)m_arrGdkEvents[i];
+
+        // NOTE: gdk_display_put_event makes a copy of the event passed to it
+        gdk_display_put_event(disp, ev);
+        gdk_event_free(ev);
+    }
+
+    m_arrGdkEvents.Clear();
+
+#if wxUSE_LOG
+    // let the logs be flashed again
+    wxLog::Resume();
+#endif
+
+    m_isInsideYield = false;
+
+    return true;
+}