X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/24a21a5f1db94e67594b1dbd001e3696792d5d73..68893d580363f62c7579cade2d9ee8f954eaf309:/src/msw/timer.cpp?ds=sidebyside

diff --git a/src/msw/timer.cpp b/src/msw/timer.cpp
index e5e42f4a6a..725a5f133f 100644
--- a/src/msw/timer.cpp
+++ b/src/msw/timer.cpp
@@ -38,7 +38,7 @@
 
 // define a hash containing all the timers: it is indexed by timer id and
 // contains the corresponding timer
-WX_DECLARE_HASH_MAP(unsigned long, wxMSWTimerImpl *, wxIntegerHash, wxIntegerEqual,
+WX_DECLARE_HASH_MAP(WPARAM, wxMSWTimerImpl *, wxIntegerHash, wxIntegerEqual,
                     wxTimerMap);
 
 // instead of using a global here, wrap it in a static function as otherwise it
@@ -105,12 +105,22 @@ bool wxMSWTimerImpl::Start(int milliseconds, bool oneShot)
     if ( !wxTimerImpl::Start(milliseconds, oneShot) )
         return false;
 
-    m_id = ::SetTimer(
-        wxTimerHiddenWindowModule::GetHWND(),  // window to send the messages to
-        GetId(),                               // timer ID
-        (UINT)m_milli,                         // delay
-        NULL                                   // timer proc.  Not used since we pass hwnd
-        );
+    // SetTimer() doesn't accept 0 timer id so use something else if the timer
+    // id at wx level is 0: as -1 (wxID_ANY) can't be used, we can safely
+    // replace 0 with it at MSW level
+    UINT idTimer = GetId();
+    if ( !idTimer )
+        idTimer = (UINT)-1;
+
+    // SetTimer() normally returns just idTimer but this might change in the
+    // future so use its return value to be safe
+    m_id = ::SetTimer
+             (
+              wxTimerHiddenWindowModule::GetHWND(),  // window for WM_TIMER
+              idTimer,                               // timer ID to create
+              (UINT)m_milli,                         // delay
+              NULL                                   // timer proc (unused)
+             );
 
     if ( !m_id )
     {
@@ -122,6 +132,11 @@ bool wxMSWTimerImpl::Start(int milliseconds, bool oneShot)
     // check that SetTimer() didn't reuse an existing id: according to the MSDN
     // this can happen and this would be catastrophic to us as we rely on ids
     // uniquely identifying the timers because we use them as keys in the hash
+    //
+    // notice that this also happens if the same id is reused for multiple
+    // timers: this used to work in previous versions but was never supported
+    // and absolutely shouldn't be done, use wxID_ANY to assign an id to the
+    // timer automatically or ensure that all your timers have unique ids
     if ( TimerMap().find(m_id) != TimerMap().end() )
     {
         wxLogError(_("Timer creation failed."));
@@ -139,7 +154,7 @@ bool wxMSWTimerImpl::Start(int milliseconds, bool oneShot)
 
 void wxMSWTimerImpl::Stop()
 {
-    wxASSERT_MSG( m_id, _T("should be running") );
+    wxASSERT_MSG( m_id, wxT("should be running") );
 
     ::KillTimer(wxTimerHiddenWindowModule::GetHWND(), m_id);
 
@@ -154,7 +169,7 @@ void wxMSWTimerImpl::Stop()
 
 void wxProcessTimer(wxMSWTimerImpl& timer)
 {
-    wxASSERT_MSG( timer.IsRunning(), _T("bogus timer id") );
+    wxASSERT_MSG( timer.IsRunning(), wxT("bogus timer id") );
 
     if ( timer.IsOneShot() )
         timer.Stop();
@@ -168,7 +183,7 @@ LRESULT APIENTRY _EXPORT wxTimerWndProc(HWND hWnd, UINT message,
 {
     if ( message == WM_TIMER )
     {
-        wxTimerMap::iterator node = TimerMap().find((unsigned long)wParam);
+        wxTimerMap::iterator node = TimerMap().find(wParam);
 
         wxCHECK_MSG( node != TimerMap().end(), 0, wxT("bogus timer id in wxTimerProc") );
 
@@ -206,7 +221,7 @@ void wxTimerHiddenWindowModule::OnExit()
     {
         if ( !::DestroyWindow(ms_hwnd) )
         {
-            wxLogLastError(_T("DestroyWindow(wxTimerHiddenWindow)"));
+            wxLogLastError(wxT("DestroyWindow(wxTimerHiddenWindow)"));
         }
 
         ms_hwnd = NULL;
@@ -216,7 +231,7 @@ void wxTimerHiddenWindowModule::OnExit()
     {
         if ( !::UnregisterClass(ms_className, wxGetInstance()) )
         {
-            wxLogLastError(_T("UnregisterClass(\"wxTimerHiddenWindow\")"));
+            wxLogLastError(wxT("UnregisterClass(\"wxTimerHiddenWindow\")"));
         }
 
         ms_className = NULL;
@@ -226,7 +241,7 @@ void wxTimerHiddenWindowModule::OnExit()
 /* static */
 HWND wxTimerHiddenWindowModule::GetHWND()
 {
-    static const wxChar *HIDDEN_WINDOW_CLASS = _T("wxTimerHiddenWindow");
+    static const wxChar *HIDDEN_WINDOW_CLASS = wxT("wxTimerHiddenWindow");
     if ( !ms_hwnd )
     {
         ms_hwnd = wxCreateHiddenWindow(&ms_className, HIDDEN_WINDOW_CLASS,