correcting dangling refs / reuse

[wxWidgets.git] / src / common / event.cpp

diff --git a/src/common/event.cpp b/src/common/event.cpp
index 678d31d3cc41388d481264983cbcf3f96ebe272e..55484498bb2926adc534c3a046e795e75e228ead 100644 (file)
--- a/src/common/event.cpp
+++ b/src/common/event.cpp
@@ -120,7 +120,7 @@ wxEventHashTable wxEvtHandler::sm_eventHashTable(wxEvtHandler::sm_eventTable);
 const wxEventTableEntry wxEvtHandler::sm_eventTableEntries[] =
     { DECLARE_EVENT_TABLE_ENTRY(wxEVT_NULL, 0, 0, (wxObjectEventFunction)NULL, NULL) };
 
 const wxEventTableEntry wxEvtHandler::sm_eventTableEntries[] =
     { DECLARE_EVENT_TABLE_ENTRY(wxEVT_NULL, 0, 0, (wxObjectEventFunction)NULL, NULL) };
 

-    
+

 #ifdef __WXDEBUG__
 // Clear up event hash table contents or we can get problems
 // when C++ is cleaning up the static object
 #ifdef __WXDEBUG__
 // Clear up event hash table contents or we can get problems
 // when C++ is cleaning up the static object


@@ -137,7 +137,7 @@ public:
 };
 IMPLEMENT_DYNAMIC_CLASS(wxEventTableEntryModule, wxModule)
 #endif
 };
 IMPLEMENT_DYNAMIC_CLASS(wxEventTableEntryModule, wxModule)
 #endif

-    
+

 // ----------------------------------------------------------------------------
 // global variables
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // global variables
 // ----------------------------------------------------------------------------


@@ -338,7 +338,7 @@ int wxNewEventType()
 // ----------------------------------------------------------------------------
 
 /*
 // ----------------------------------------------------------------------------
 
 /*

- * General wxWindows events, covering
+ * General wxWidgets events, covering

  * all interesting things that might happen (button clicking, resizing,
  * setting text in widgets, etc.).
  *
  * all interesting things that might happen (button clicking, resizing,
  * setting text in widgets, etc.).
  *


@@ -417,23 +417,23 @@ bool wxUpdateUIEvent::CanUpdate(wxWindowBase *win)
 
     if (sm_updateInterval == -1)
         return false;
 
     if (sm_updateInterval == -1)
         return false;

-    else if (sm_updateInterval == 0)
+
+    if (sm_updateInterval == 0)

         return true;
         return true;

-    else
-    {
+

 #if wxUSE_STOPWATCH && wxUSE_LONGLONG
 #if wxUSE_STOPWATCH && wxUSE_LONGLONG

-        wxLongLong now = wxGetLocalTimeMillis();
-        if (now > (sm_lastUpdate + sm_updateInterval))
-        {
-            return true;
-        }
-#else
-        // If we don't have wxStopWatch or wxLongLong, we
-        // should err on the safe side and update now anyway.
+    wxLongLong now = wxGetLocalTimeMillis();
+    if (now > (sm_lastUpdate + sm_updateInterval))
+    {

         return true;
         return true;

-#endif

     }
     }

+

     return false;
     return false;

+#else
+    // If we don't have wxStopWatch or wxLongLong, we
+    // should err on the safe side and update now anyway.
+    return true;
+#endif

 }
 
 // Reset the update time to provide a delay until the next
 }
 
 // Reset the update time to provide a delay until the next


@@ -759,7 +759,7 @@ wxEventHashTable::wxEventHashTable(const wxEventTable &table)
                   m_rebuildHash(true)
 {
     AllocEventTypeTable(EVENT_TYPE_TABLE_INIT_SIZE);
                   m_rebuildHash(true)
 {
     AllocEventTypeTable(EVENT_TYPE_TABLE_INIT_SIZE);

-    
+

     m_next = sm_first;
     if (m_next)
         m_next->m_previous = this;
     m_next = sm_first;
     if (m_next)
         m_next->m_previous = this;


@@ -774,7 +774,7 @@ wxEventHashTable::~wxEventHashTable()
         m_previous->m_next = m_next;
     if (sm_first == this)
         sm_first = m_next;
         m_previous->m_next = m_next;
     if (sm_first == this)
         sm_first = m_next;

-    
+

     Clear();
 }
 
     Clear();
 }
 


@@ -817,9 +817,9 @@ bool wxEventHashTable::HandleEvent(wxEvent &event, wxEvtHandler *self)
         InitHashTable();
         m_rebuildHash = false;
     }
         InitHashTable();
         m_rebuildHash = false;
     }

-    
+

     if (!m_eventTypeTable)
     if (!m_eventTypeTable)

-        return FALSE;
+        return false;

 
     // Find all entries for the given event type.
     wxEventType eventType = event.GetEventType();
 
     // Find all entries for the given event type.
     wxEventType eventType = event.GetEventType();


@@ -881,7 +881,7 @@ void wxEventHashTable::AddEntry(const wxEventTableEntry &entry)
     // This might happen 'accidentally' as the app is exiting
     if (!m_eventTypeTable)
         return;
     // This might happen 'accidentally' as the app is exiting
     if (!m_eventTypeTable)
         return;

-    
+

     EventTypeTablePointer *peTTnode = &m_eventTypeTable[entry.m_eventType % m_size];
     EventTypeTablePointer  eTTnode = *peTTnode;
 
     EventTypeTablePointer *peTTnode = &m_eventTypeTable[entry.m_eventType % m_size];
     EventTypeTablePointer  eTTnode = *peTTnode;
 


@@ -1095,15 +1095,20 @@ void wxEvtHandler::AddPendingEvent(wxEvent& event)
 
 void wxEvtHandler::ProcessPendingEvents()
 {
 
 void wxEvtHandler::ProcessPendingEvents()
 {

-    // DE: It doesn't look like this method was intended to be called unless
-    // pending events have already been created.
-    wxASSERT_MSG(m_pendingEvents,wxT("Please call wxApp::ProcessPendingEvents() instead"));
+    // this method is only called by wxApp if this handler does have pending
+    // events
+    wxCHECK_RET( m_pendingEvents,
+                 wxT("Please call wxApp::ProcessPendingEvents() instead") );
+

 #if defined(__VISAGECPP__)
     wxENTER_CRIT_SECT( m_eventsLocker);
 #else
     wxENTER_CRIT_SECT( *m_eventsLocker);
 #endif
 
 #if defined(__VISAGECPP__)
     wxENTER_CRIT_SECT( m_eventsLocker);
 #else
     wxENTER_CRIT_SECT( *m_eventsLocker);
 #endif
 

+    // remember last event to process during this iteration
+    wxList::compatibility_iterator lastPendingNode = m_pendingEvents->GetLast();
+

     wxList::compatibility_iterator node = m_pendingEvents->GetFirst();
     while ( node )
     {
     wxList::compatibility_iterator node = m_pendingEvents->GetFirst();
     while ( node )
     {


@@ -1125,6 +1130,13 @@ void wxEvtHandler::ProcessPendingEvents()
         wxENTER_CRIT_SECT( *m_eventsLocker);
 #endif
 
         wxENTER_CRIT_SECT( *m_eventsLocker);
 #endif
 

+        // leave the loop once we have processed all events that were present
+        // at the start of ProcessPendingEvents because otherwise we could get
+        // into infinite loop if the pending event handler execution resulted
+        // in another event being posted
+        if ( node == lastPendingNode )
+            break;
+

         node = m_pendingEvents->GetFirst();
     }
 
         node = m_pendingEvents->GetFirst();
     }
 


@@ -1150,9 +1162,9 @@ wxEvtHandler::ProcessEventIfMatches(const wxEventTableEntryBase& entry,
     // the event table (meaning "any") or the event id matches the id
     // specified in the event table either exactly or by falling into
     // range between first and last
     // the event table (meaning "any") or the event id matches the id
     // specified in the event table either exactly or by falling into
     // range between first and last

-    if ((tableId1 == -1) ||
-        (tableId2 == -1 && tableId1 == event.GetId()) ||
-        (tableId2 != -1 &&
+    if ((tableId1 == wxID_ANY) ||
+        (tableId2 == wxID_ANY && tableId1 == event.GetId()) ||
+        (tableId2 != wxID_ANY &&

          (event.GetId() >= tableId1 && event.GetId() <= tableId2)))
     {
         event.Skip(false);
          (event.GetId() >= tableId1 && event.GetId() <= tableId2)))
     {
         event.Skip(false);


@@ -1302,7 +1314,7 @@ bool wxEvtHandler::Disconnect( int id, int lastId, wxEventType eventType,
 #endif // WXWIN_COMPATIBILITY_EVENT_TYPES/!WXWIN_COMPATIBILITY_EVENT_TYPES
 
         if ((entry->m_id == id) &&
 #endif // WXWIN_COMPATIBILITY_EVENT_TYPES/!WXWIN_COMPATIBILITY_EVENT_TYPES
 
         if ((entry->m_id == id) &&

-            ((entry->m_lastId == lastId) || (lastId == -1)) &&
+            ((entry->m_lastId == lastId) || (lastId == wxID_ANY)) &&

             ((entry->m_eventType == eventType) || (eventType == wxEVT_NULL)) &&
             ((entry->m_fn == func) || (func == (wxObjectEventFunction)NULL)) &&
             ((entry->m_eventSink == eventSink) || (eventSink == (wxEvtHandler*)NULL)) &&
             ((entry->m_eventType == eventType) || (eventType == wxEVT_NULL)) &&
             ((entry->m_fn == func) || (func == (wxObjectEventFunction)NULL)) &&
             ((entry->m_eventSink == eventSink) || (eventSink == (wxEvtHandler*)NULL)) &&