Ensure there is valid context for DrawRectangle

[wxWidgets.git] / src / msw / timer.cpp

diff --git a/src/msw/timer.cpp b/src/msw/timer.cpp
index 4193755d71a08b5ddfb032ac226adf277545548b..21f40cfb03c582cd9b9dade9a55a3cfdfe4e1087 100644 (file)
--- a/src/msw/timer.cpp
+++ b/src/msw/timer.cpp
@@ -31,6 +31,7 @@
 #endif
 
 #include "wx/msw/private.h"
+#include "wx/msw/private/hiddenwin.h"
 
 // ----------------------------------------------------------------------------
 // private globals
@@ -76,11 +77,6 @@ UINT_PTR GetNewTimerId(wxMSWTimerImpl *t)
 LRESULT APIENTRY _EXPORT wxTimerWndProc(HWND hWnd, UINT message,
                                         WPARAM wParam, LPARAM lParam);
 
-// implemented in utils.cpp
-extern "C" WXDLLIMPEXP_BASE HWND
-wxCreateHiddenWindow(LPCTSTR *pclassname, LPCTSTR classname, WNDPROC wndproc);
-
-
 // ----------------------------------------------------------------------------
 // wxTimerHiddenWindowModule: used to manage the hidden window used for
 // catching timer messages (we need a module to ensure that the window is
@@ -118,22 +114,12 @@ IMPLEMENT_DYNAMIC_CLASS(wxTimerHiddenWindowModule, wxModule)
 // wxMSWTimerImpl class
 // ----------------------------------------------------------------------------
 
-wxMSWTimerImpl::wxMSWTimerImpl(wxTimer *timer)
-:wxTimerImpl(timer)
-{
-    m_id = GetNewTimerId(this);
-}
-
-wxMSWTimerImpl::~wxMSWTimerImpl()
-{
-    TimerMap().erase(m_id);
-}
-
 bool wxMSWTimerImpl::Start(int milliseconds, bool oneShot)
 {
     if ( !wxTimerImpl::Start(milliseconds, oneShot) )
         return false;
 
+    m_id = GetNewTimerId(this);
     // SetTimer() normally returns just idTimer but this might change in the
     // future so use its return value to be safe
     UINT_PTR ret = ::SetTimer
@@ -157,6 +143,8 @@ bool wxMSWTimerImpl::Start(int milliseconds, bool oneShot)
 void wxMSWTimerImpl::Stop()
 {
     ::KillTimer(wxTimerHiddenWindowModule::GetHWND(), m_id);
+    TimerMap().erase(m_id);
+    m_id = 0;
 }
 
 // ----------------------------------------------------------------------------
@@ -181,15 +169,17 @@ LRESULT APIENTRY _EXPORT wxTimerWndProc(HWND hWnd, UINT message,
     {
         wxTimerMap::iterator node = TimerMap().find(wParam);
 
-        wxCHECK_MSG( node != TimerMap().end(), 0, wxT("bogus timer id in wxTimerProc") );
+        if ( node != TimerMap().end() )
+        {
+            wxProcessTimer(*(node->second));
 
-        wxProcessTimer(*(node->second));
-    }
-    else
-    {
-        return ::DefWindowProc(hWnd, message, wParam, lParam);
+            return 0;
+        }
+        //else: Unknown timer, probably one of our timers that had fired just
+        //      before being removed from the timers map by Stop().
     }
-    return 0;
+
+    return ::DefWindowProc(hWnd, message, wParam, lParam);
 }
 
 // ----------------------------------------------------------------------------