simplify Refresh() and Update()

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

diff --git a/src/common/event.cpp b/src/common/event.cpp
index 3ee0d136ed3fc7652352054dbaee41f82c2f7304..85951a1b3eb7c32e2681cd44e117f3c053748a0a 100644 (file)
--- a/src/common/event.cpp
+++ b/src/common/event.cpp
@@ -38,6 +38,7 @@
         #include "wx/window.h"
         #include "wx/control.h"
         #include "wx/dc.h"
+        #include "wx/spinbutt.h"
         #include "wx/textctrl.h"
         #include "wx/validate.h"
     #endif // wxUSE_GUI
@@ -232,6 +233,21 @@ wxDEFINE_EVENT( wxEVT_SCROLL_THUMBTRACK, wxScrollEvent )
 wxDEFINE_EVENT( wxEVT_SCROLL_THUMBRELEASE, wxScrollEvent )
 wxDEFINE_EVENT( wxEVT_SCROLL_CHANGED, wxScrollEvent )
 
+// Due to a bug in older wx versions, wxSpinEvents were being sent with type of
+// wxEVT_SCROLL_LINEUP, wxEVT_SCROLL_LINEDOWN and wxEVT_SCROLL_THUMBTRACK. But
+// with the type-safe events in place, these event types are associated with
+// wxScrollEvent. To allow handling of spin events, new event types have been
+// defined in spinbutt.h/spinnbuttcmn.cpp. To maintain backward compatibility
+// the spin event types are being initialized with the scroll event types.
+
+#if wxUSE_SPINBTN
+
+wxDEFINE_EVENT_ALIAS( wxEVT_SPIN_UP,   wxSpinEvent, wxEVT_SCROLL_LINEUP )
+wxDEFINE_EVENT_ALIAS( wxEVT_SPIN_DOWN, wxSpinEvent, wxEVT_SCROLL_LINEDOWN )
+wxDEFINE_EVENT_ALIAS( wxEVT_SPIN,      wxSpinEvent, wxEVT_SCROLL_THUMBTRACK )
+
+#endif // wxUSE_SPINBTN
+
 // Scroll events from wxWindow
 wxDEFINE_EVENT( wxEVT_SCROLLWIN_TOP, wxScrollWinEvent )
 wxDEFINE_EVENT( wxEVT_SCROLLWIN_BOTTOM, wxScrollWinEvent )
@@ -1036,12 +1052,7 @@ wxEvtHandler::wxEvtHandler()
 
 wxEvtHandler::~wxEvtHandler()
 {
-    // Takes itself out of the list of handlers
-    if (m_previousHandler)
-        m_previousHandler->m_nextHandler = m_nextHandler;
-
-    if (m_nextHandler)
-        m_nextHandler->m_previousHandler = m_previousHandler;
+    Unlink();
 
     if (m_dynamicEvents)
     {
@@ -1103,6 +1114,26 @@ wxEvtHandler::~wxEvtHandler()
         delete m_clientObject;
 }
 
+void wxEvtHandler::Unlink()
+{
+    // this event handler must take itself out of the chain of handlers:
+
+    if (m_previousHandler)
+        m_previousHandler->SetNextHandler(m_nextHandler);
+
+    if (m_nextHandler)
+        m_nextHandler->SetPreviousHandler(m_previousHandler);
+
+    m_nextHandler = NULL;
+    m_previousHandler = NULL;
+}
+
+bool wxEvtHandler::IsUnlinked() const
+{
+    return m_previousHandler == NULL &&
+           m_nextHandler == NULL;
+}
+
 #if wxUSE_THREADS
 
 bool wxEvtHandler::ProcessThreadEvent(const wxEvent& event)