X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/52c9b3490726ee4ad722d7a8fe329e9533ac94fb..a907139aa35261dba1b0377d8e0e138713812c76:/src/common/evtloopcmn.cpp

diff --git a/src/common/evtloopcmn.cpp b/src/common/evtloopcmn.cpp
index 5cdd254975..f0ae34416a 100644
--- a/src/common/evtloopcmn.cpp
+++ b/src/common/evtloopcmn.cpp
@@ -9,14 +9,6 @@
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
-// ============================================================================
-// declarations
-// ============================================================================
-
-// ----------------------------------------------------------------------------
-// headers
-// ----------------------------------------------------------------------------
-
 // for compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -26,14 +18,166 @@
 
 #include "wx/evtloop.h"
 
+#ifndef WX_PRECOMP
+    #include "wx/app.h"
+#endif //WX_PRECOMP
+
 // ----------------------------------------------------------------------------
 // globals
 // ----------------------------------------------------------------------------
 
-wxEventLoop *wxEventLoopBase::ms_activeLoop = NULL;
+wxEventLoopBase *wxEventLoopBase::ms_activeLoop = NULL;
+
+wxEventLoopBase::wxEventLoopBase()
+{
+    m_isInsideYield = false;
+    m_eventsToProcessInsideYield = wxEVT_CATEGORY_ALL;
+}
+
+void wxEventLoopBase::DelayPendingEventHandler(wxEvtHandler* toDelay)
+{
+    wxENTER_CRIT_SECT(m_handlersWithPendingEventsLocker);
+
+    // move the handler from the list of handlers with processable pending events
+    // to the list of handlers with pending events which needs to be processed later
+    m_handlersWithPendingEvents.Remove(toDelay);
+
+    if (m_handlersWithPendingDelayedEvents.Index(toDelay) == wxNOT_FOUND)
+        m_handlersWithPendingDelayedEvents.Add(toDelay);
+
+    wxLEAVE_CRIT_SECT(m_handlersWithPendingEventsLocker);
+}
+
+void wxEventLoopBase::RemovePendingEventHandler(wxEvtHandler* toRemove)
+{
+    wxENTER_CRIT_SECT(m_handlersWithPendingEventsLocker);
+
+    if (m_handlersWithPendingEvents.Index(toRemove) != wxNOT_FOUND)
+    {
+        m_handlersWithPendingEvents.Remove(toRemove);
+
+        // check that the handler was present only once in the list
+        wxASSERT_MSG( m_handlersWithPendingEvents.Index(toRemove) == wxNOT_FOUND,
+                        "Handler occurs twice in the m_handlersWithPendingEvents list!" );
+    }
+    //else: it wasn't in this list at all, it's ok
+
+    if (m_handlersWithPendingDelayedEvents.Index(toRemove) != wxNOT_FOUND)
+    {
+        m_handlersWithPendingDelayedEvents.Remove(toRemove);
+
+        // check that the handler was present only once in the list
+        wxASSERT_MSG( m_handlersWithPendingDelayedEvents.Index(toRemove) == wxNOT_FOUND,
+                        "Handler occurs twice in m_handlersWithPendingDelayedEvents list!" );
+    }
+    //else: it wasn't in this list at all, it's ok
+
+    wxLEAVE_CRIT_SECT(m_handlersWithPendingEventsLocker);
+}
+
+void wxEventLoopBase::AppendPendingEventHandler(wxEvtHandler* toAppend)
+{
+    wxENTER_CRIT_SECT(m_handlersWithPendingEventsLocker);
+
+    if ( m_handlersWithPendingEvents.Index(toAppend) == wxNOT_FOUND )
+        m_handlersWithPendingEvents.Add(toAppend);
+
+    wxLEAVE_CRIT_SECT(m_handlersWithPendingEventsLocker);
+}
+
+bool wxEventLoopBase::HasPendingEvents() const
+{
+    wxENTER_CRIT_SECT(const_cast<wxEventLoopBase*>(this)->m_handlersWithPendingEventsLocker);
+
+    bool has = !m_handlersWithPendingEvents.IsEmpty();
+
+    wxLEAVE_CRIT_SECT(const_cast<wxEventLoopBase*>(this)->m_handlersWithPendingEventsLocker);
+
+    return has;
+}
+
+void wxEventLoopBase::SuspendProcessingOfPendingEvents()
+{
+    wxENTER_CRIT_SECT(m_handlersWithPendingEventsLocker);
+}
+
+void wxEventLoopBase::ResumeProcessingOfPendingEvents()
+{
+    wxLEAVE_CRIT_SECT(m_handlersWithPendingEventsLocker);
+}
+
+void wxEventLoopBase::ProcessPendingEvents()
+{
+    wxENTER_CRIT_SECT(m_handlersWithPendingEventsLocker);
+
+    wxCHECK_RET( m_handlersWithPendingDelayedEvents.IsEmpty(),
+                 "this helper list should be empty" );
+
+    // iterate until the list becomes empty: the handlers remove themselves
+    // from it when they don't have any more pending events
+    while (!m_handlersWithPendingEvents.IsEmpty())
+    {
+        // In ProcessPendingEvents(), new handlers might be added
+        // and we can safely leave the critical section here.
+        wxLEAVE_CRIT_SECT(m_handlersWithPendingEventsLocker);
+
+        // NOTE: we always call ProcessPendingEvents() on the first event handler
+        //       with pending events because handlers auto-remove themselves
+        //       from this list (see RemovePendingEventHandler) if they have no
+        //       more pending events.
+        m_handlersWithPendingEvents[0]->ProcessPendingEvents();
+
+        wxENTER_CRIT_SECT(m_handlersWithPendingEventsLocker);
+    }
+
+    // now the wxHandlersWithPendingEvents is surely empty; however some event
+    // handlers may have moved themselves into wxHandlersWithPendingDelayedEvents
+    // because of a selective wxYield call in progress.
+    // Now we need to move them back to wxHandlersWithPendingEvents so the next
+    // call to this function has the chance of processing them:
+    if (!m_handlersWithPendingDelayedEvents.IsEmpty())
+    {
+        WX_APPEND_ARRAY(m_handlersWithPendingEvents, m_handlersWithPendingDelayedEvents);
+        m_handlersWithPendingDelayedEvents.Clear();
+    }
+
+    wxLEAVE_CRIT_SECT(m_handlersWithPendingEventsLocker);
+}
+
+void wxEventLoopBase::WakeUpIdle()
+{
+    WakeUp();
+}
+
+bool wxEventLoopBase::ProcessIdle()
+{
+    // process pending wx events before sending idle events
+    ProcessPendingEvents();
+
+    wxIdleEvent event;
+
+    event.SetEventObject(wxTheApp);
+    wxTheApp->ProcessEvent(event);
+    return event.MoreRequested();
+}
+
+bool wxEventLoopBase::Yield(bool onlyIfNeeded)
+{
+    if ( m_isInsideYield )
+    {
+        if ( !onlyIfNeeded )
+        {
+            wxFAIL_MSG( wxT("wxYield called recursively" ) );
+        }
+
+        return false;
+    }
+
+    return YieldFor(wxEVT_CATEGORY_ALL);
+}
 
 // wxEventLoopManual is unused in the other ports
-#if defined(__WXMSW__) || defined(__WXMAC__)
+#if defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXDFB__) || (defined(__UNIX__) && wxUSE_BASE)
 
 // ============================================================================
 // wxEventLoopManual implementation
@@ -53,7 +197,7 @@ int wxEventLoopManual::Run()
     // ProcessIdle() and Dispatch() below may throw so the code here should
     // be exception-safe, hence we must use local objects for all actions we
     // should undo
-    wxEventLoopActivator activate(wx_static_cast(wxEventLoop *, this));
+    wxEventLoopActivator activate(this);
 
     // we must ensure that OnExit() is called even if an exception is thrown
     // from inside Dispatch() but we must call it from Exit() in normal
@@ -148,5 +292,5 @@ void wxEventLoopManual::Exit(int rc)
     WakeUp();
 }
 
-#endif // __WXMSW__ || __WXMAC__
+#endif // __WXMSW__ || __WXMAC__ || __WXDFB__