Refactor wxEventLoopSource-related code.

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

diff --git a/src/common/evtloopcmn.cpp b/src/common/evtloopcmn.cpp
index 71939e27b224d3db6517a209517d1ca8eb4ab43d..5f9894d12501b99563129bcd4b3a1d8005627106 100644 (file)
--- 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"
 
@@ -26,11 +18,71 @@
 
 #include "wx/evtloop.h"
 
+#ifndef WX_PRECOMP
+    #include "wx/app.h"
+#endif //WX_PRECOMP
+
 // ----------------------------------------------------------------------------
-// globals
+// wxEventLoopBase
 // ----------------------------------------------------------------------------
 
-wxEventLoop *wxEventLoopBase::ms_activeLoop = NULL;
+wxEventLoopBase *wxEventLoopBase::ms_activeLoop = NULL;
+
+wxEventLoopBase::wxEventLoopBase()
+{
+    m_isInsideYield = false;
+    m_eventsToProcessInsideYield = wxEVT_CATEGORY_ALL;
+}
+
+bool wxEventLoopBase::IsMain() const
+{
+    if (wxTheApp)
+        return wxTheApp->GetMainLoop() == this;
+    return false;
+}
+
+/* static */
+void wxEventLoopBase::SetActive(wxEventLoopBase* loop)
+{
+    ms_activeLoop = loop;
+
+    if (wxTheApp)
+        wxTheApp->OnEventLoopEnter(loop);
+}
+
+void wxEventLoopBase::OnExit()
+{
+    if (wxTheApp)
+        wxTheApp->OnEventLoopExit(this);
+}
+
+void wxEventLoopBase::WakeUpIdle()
+{
+    WakeUp();
+}
+
+bool wxEventLoopBase::ProcessIdle()
+{
+    return wxTheApp && wxTheApp->ProcessIdle();
+}
+
+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__) || defined(__WXDFB__) || (defined(__UNIX__) && wxUSE_BASE)
 
 // ============================================================================
 // wxEventLoopManual implementation
@@ -42,18 +94,33 @@ wxEventLoopManual::wxEventLoopManual()
     m_shouldExit = false;
 }
 
+bool wxEventLoopManual::ProcessEvents()
+{
+    // process pending wx events first as they correspond to low-level events
+    // which happened before, i.e. typically pending events were queued by a
+    // previous call to Dispatch() and if we didn't process them now the next
+    // call to it might enqueue them again (as happens with e.g. socket events
+    // which would be generated as long as there is input available on socket
+    // and this input is only removed from it when pending event handlers are
+    // executed)
+    if ( wxTheApp )
+        wxTheApp->ProcessPendingEvents();
+
+    return Dispatch();
+}
+
 int wxEventLoopManual::Run()
 {
     // event loops are not recursive, you need to create another loop!
-    wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") );
+    wxCHECK_MSG( !IsRunning(), -1, wxT("can't reenter a message loop") );
 
-    // ProcessIdle() and Dispatch() below may throw so the code here should
+    // ProcessIdle() and ProcessEvents() 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
+    // from inside ProcessEvents() but we must call it from Exit() in normal
     // situations because it is supposed to be called synchronously,
     // wxModalEventLoop depends on this (so we can't just use ON_BLOCK_EXIT or
     // something similar here)
@@ -72,7 +139,7 @@ int wxEventLoopManual::Run()
 
                 // generate and process idle events for as long as we don't
                 // have anything else to do
-                while ( !Pending() && (wxTheApp && wxTheApp->ProcessIdle()) )
+                while ( !Pending() && ProcessIdle() )
                     ;
 
                 // if the "should exit" flag is set, the loop should terminate
@@ -81,14 +148,15 @@ int wxEventLoopManual::Run()
                 if ( m_shouldExit )
                 {
                     while ( Pending() )
-                        Dispatch();
+                        ProcessEvents();
 
                     break;
                 }
 
-                // a message came or no more idle processing to do, sit in
-                // Dispatch() waiting for the next message
-                if ( !Dispatch() )
+                // a message came or no more idle processing to do, dispatch
+                // all the pending events and call Dispatch() to wait for the
+                // next message
+                if ( !ProcessEvents() )
                 {
                     // we got WM_QUIT
                     break;
@@ -127,7 +195,7 @@ int wxEventLoopManual::Run()
 
 void wxEventLoopManual::Exit(int rc)
 {
-    wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
+    wxCHECK_RET( IsRunning(), wxT("can't call Exit() if not running") );
 
     m_exitcode = rc;
     m_shouldExit = true;
@@ -145,3 +213,5 @@ void wxEventLoopManual::Exit(int rc)
     WakeUp();
 }
 
+#endif // __WXMSW__ || __WXMAC__ || __WXDFB__
+