extending calculation of visible region

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

diff --git a/src/msw/timer.cpp b/src/msw/timer.cpp
index 1ebd9535cf3877277eab4a062641c8fcbfac3d3d..796db83d7a6c63b073eaf46eb93f46a51f27c24f 100644 (file)
--- a/src/msw/timer.cpp
+++ b/src/msw/timer.cpp
@@ -32,72 +32,37 @@
 #endif
 
 #include "wx/hashmap.h"
-#include "wx/module.h"
 
 #include "wx/timer.h"
 
 #include "wx/msw/private.h"
 
 // from utils.cpp
-extern "C" HWND
+extern "C" WXDLLIMPEXP_BASE HWND
 wxCreateHiddenWindow(LPCTSTR *pclassname, LPCTSTR classname, WNDPROC wndproc);
 
 // ----------------------------------------------------------------------------
-// private functions
+// private globals
 // ----------------------------------------------------------------------------
 
-WX_DECLARE_HASH_MAP( long,
-                     wxTimer *,
-                     wxIntegerHash,
-                     wxIntegerEqual,
-                     wxTimerMap );
-
-wxTimerMap wxTimerList;
+// define a hash containing all the timers: it is indexed by timer id and
+// contains the corresponding timer
+WX_DECLARE_HASH_MAP(unsigned long, wxTimer *, wxIntegerHash, wxIntegerEqual,
+                    wxTimerMap);
 
-void WINAPI wxTimerProc(HWND hwnd, WORD, int idTimer, DWORD);
-
-// ----------------------------------------------------------------------------
-// macros
-// ----------------------------------------------------------------------------
-
-IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxObject)
+static wxTimerMap g_timerMap;
 
 // ----------------------------------------------------------------------------
-// globals
+// private functions
 // ----------------------------------------------------------------------------
 
-// these variables are for timer shared hwnd management
-static const wxChar *wxMSWTIMER_WNDCLASSNAME = wxT("_wxTimer_Internal_Class");
-static LPCTSTR s_classnameTimerWnd = NULL;
-static HWND s_hwndTimer = NULL;
+void WINAPI wxTimerProc(HWND hwnd, WORD, int idTimer, DWORD);
 
 // ----------------------------------------------------------------------------
-// private classes
+// macros
 // ----------------------------------------------------------------------------
 
-class wxTimerModule : public wxModule
-{
-public:
-    virtual bool OnInit() { return true; }
-    virtual void OnExit()
-    {
-        if ( s_hwndTimer )
-        {
-            ::DestroyWindow(s_hwndTimer);
-            s_hwndTimer = NULL;
-
-            if ( !::UnregisterClass(wxMSWTIMER_WNDCLASSNAME, wxGetInstance()) )
-            {
-                wxLogLastError(_T("UnregisterClass(wxTimerClass)"));
-            }
-
-            s_classnameTimerWnd = NULL;
-        }
-    }
-
-private:
-    DECLARE_DYNAMIC_CLASS(wxTimerModule)
-};
+IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxObject)
 
 // ============================================================================
 // implementation
@@ -110,17 +75,11 @@ private:
 void wxTimer::Init()
 {
     m_id = 0;
-    m_hwnd = NULL;
 }
 
 wxTimer::~wxTimer()
 {
-    // save id as Stop() changes it
-    long id = m_id;
-
     wxTimer::Stop();
-
-    wxTimerList.erase(id);
 }
 
 bool wxTimer::Start(int milliseconds, bool oneShot)
@@ -129,50 +88,12 @@ bool wxTimer::Start(int milliseconds, bool oneShot)
 
     wxCHECK_MSG( m_milli > 0, false, wxT("invalid value for timer timeour") );
 
-    // find a window for SetTimer(): it should be a valid HWND owned by this
-    // thread (even if we had a non NULL m_hwnd before, reset it in case the
-    // owner has changed)
-    m_hwnd = NULL;
-
-    // first try the owner window
-    if ( m_owner )
-    {
-        wxWindow *win = wxDynamicCast(m_owner, wxWindow);
-        if ( win )
-        {
-            m_hwnd = win->GetHWND();
-        }
-    }
-
-    // if not, use a shared hidden window
-    if ( !m_hwnd )
-    {
-        if ( !s_hwndTimer )
-        {
-            s_hwndTimer = wxCreateHiddenWindow
-                          (
-                            &s_classnameTimerWnd,
-                            wxMSWTIMER_WNDCLASSNAME,
-                            ::DefWindowProc
-                          );
-
-            if ( !s_hwndTimer )
-            {
-                wxASSERT_MSG( s_hwndTimer, wxT("can't create a HWND for wxTimer") );
-                return false;
-            }
-        }
-
-        m_hwnd = (WXHWND)s_hwndTimer;
-
-    }
-
     m_id = ::SetTimer
              (
-                (HWND)m_hwnd,
-                (UINT)(m_id ? m_id : 1),
-                (UINT)m_milli,
-                (TIMERPROC)wxTimerProc
+                NULL,                       // don't use window
+                1,                          // id ignored with NULL hwnd anyhow
+                (UINT)m_milli,              // delay
+                (TIMERPROC)wxTimerProc      // timer proc to call
              );
 
     if ( !m_id )
@@ -182,7 +103,20 @@ bool wxTimer::Start(int milliseconds, bool oneShot)
         return false;
     }
 
-    wxTimerList[m_id] = this;
+    // 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
+    if ( g_timerMap.find(m_id) != g_timerMap.end() )
+    {
+        wxLogError(_("Timer creation failed."));
+
+        ::KillTimer(NULL, m_id);
+        m_id = 0;
+
+        return false;
+    }
+
+    g_timerMap[m_id] = this;
 
     return true;
 }
@@ -191,10 +125,9 @@ void wxTimer::Stop()
 {
     if ( m_id )
     {
-        ::KillTimer((HWND)m_hwnd, (UINT)m_id);
-        m_hwnd = NULL;
+        ::KillTimer(NULL, m_id);
 
-        wxTimerList.erase(m_id);
+        g_timerMap.erase(m_id);
     }
 
     m_id = 0;
@@ -206,9 +139,7 @@ void wxTimer::Stop()
 
 void wxProcessTimer(wxTimer& timer)
 {
-    // Avoid to process spurious timer events
-    if ( timer.m_id == 0)
-        return;
+    wxASSERT_MSG( timer.m_id != 0, _T("bogus timer id") );
 
     if ( timer.IsOneShot() )
         timer.Stop();
@@ -218,9 +149,9 @@ void wxProcessTimer(wxTimer& timer)
 
 void WINAPI wxTimerProc(HWND WXUNUSED(hwnd), WORD, int idTimer, DWORD)
 {
-    wxTimerMap::iterator node = wxTimerList.find((long)idTimer);
+    wxTimerMap::iterator node = g_timerMap.find(idTimer);
 
-    wxASSERT_MSG( node != wxTimerList.end(), wxT("bogus timer id in wxTimerProc") );
+    wxCHECK_RET( node != g_timerMap.end(), wxT("bogus timer id in wxTimerProc") );
 
     wxProcessTimer(*(node->second));
 }