/////////////////////////////////////////////////////////////////////////////
-// Name: msw/timer.cpp
+// Name: src/msw/timer.cpp
// Purpose: wxTimer implementation
// Author: Julian Smart
// Modified by: Vadim Zeitlin (use hash map instead of list, global rewrite)
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
- #pragma implementation "timer.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#if wxUSE_TIMER
+#include "wx/msw/private/timer.h"
+
#ifndef WX_PRECOMP
- #include "wx/window.h"
#include "wx/list.h"
#include "wx/event.h"
#include "wx/app.h"
#include "wx/intl.h"
#include "wx/log.h"
+ #include "wx/hashmap.h"
+ #include "wx/module.h"
#endif
-#include "wx/hashmap.h"
-
-#include "wx/timer.h"
-
#include "wx/msw/private.h"
// ----------------------------------------------------------------------------
// 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,
+WX_DECLARE_HASH_MAP(WPARAM, wxMSWTimerImpl *, wxIntegerHash, wxIntegerEqual,
wxTimerMap);
-static wxTimerMap g_timerMap;
+// instead of using a global here, wrap it in a static function as otherwise it
+// could have been used before being initialized if a timer object were created
+// globally
+static wxTimerMap& TimerMap()
+{
+ static wxTimerMap s_timerMap;
+
+ return s_timerMap;
+}
+
+// This gets a unique, non-zero timer ID and creates an entry in the TimerMap
+UINT_PTR GetNewTimerId(wxMSWTimerImpl *t)
+{
+ static UINT_PTR lastTimerId = 0;
+
+ while (lastTimerId == 0 ||
+ TimerMap().find(lastTimerId) != TimerMap().end())
+ {
+ lastTimerId = lastTimerId + 1;
+ }
+
+ TimerMap()[lastTimerId] = t;
+
+ return lastTimerId;
+}
+
+
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
-// timer callback used for all timers
-void WINAPI wxTimerProc(HWND hwnd, UINT msg, UINT idTimer, DWORD dwTime);
+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);
+
// ----------------------------------------------------------------------------
-// macros
+// wxTimerHiddenWindowModule: used to manage the hidden window used for
+// catching timer messages (we need a module to ensure that the window is
+// always deleted)
// ----------------------------------------------------------------------------
-IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxEvtHandler)
+class wxTimerHiddenWindowModule : public wxModule
+{
+public:
+ // module init/finalize
+ virtual bool OnInit();
+ virtual void OnExit();
+
+ // get the hidden window (creates on demand)
+ static HWND GetHWND();
+
+private:
+ // the HWND of the hidden window
+ static HWND ms_hwnd;
+
+ // the class used to create it
+ static const wxChar *ms_className;
+
+ DECLARE_DYNAMIC_CLASS(wxTimerHiddenWindowModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxTimerHiddenWindowModule, wxModule)
// ============================================================================
// implementation
// ============================================================================
+
// ----------------------------------------------------------------------------
-// wxTimer class
+// wxMSWTimerImpl class
// ----------------------------------------------------------------------------
-void wxTimer::Init()
+bool wxMSWTimerImpl::Start(int milliseconds, bool oneShot)
{
- m_id = 0;
-}
-
-wxTimer::~wxTimer()
-{
- wxTimer::Stop();
-}
-
-bool wxTimer::Start(int milliseconds, bool oneShot)
-{
- (void)wxTimerBase::Start(milliseconds, oneShot);
-
- wxCHECK_MSG( m_milli > 0, false, wxT("invalid value for timer timeout") );
+ if ( !wxTimerImpl::Start(milliseconds, oneShot) )
+ return false;
- m_id = ::SetTimer
+ 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
(
- NULL, // don't use window
- 1, // id ignored with NULL hwnd anyhow
- (UINT)m_milli, // delay
- wxTimerProc // timer proc to call
+ wxTimerHiddenWindowModule::GetHWND(), // window for WM_TIMER
+ m_id, // timer ID to create
+ (UINT)m_milli, // delay
+ NULL // timer proc (unused)
);
- if ( !m_id )
+ if ( ret == 0 )
{
wxLogSysError(_("Couldn't create a timer"));
return false;
}
- // 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."));
+ return true;
+}
- ::KillTimer(NULL, m_id);
- m_id = 0;
+void wxMSWTimerImpl::Stop()
+{
+ ::KillTimer(wxTimerHiddenWindowModule::GetHWND(), m_id);
+ TimerMap().erase(m_id);
+ m_id = 0;
+}
- return false;
- }
+// ----------------------------------------------------------------------------
+// private functions
+// ----------------------------------------------------------------------------
- g_timerMap[m_id] = this;
+void wxProcessTimer(wxMSWTimerImpl& timer)
+{
+ wxASSERT_MSG( timer.IsRunning(), wxT("bogus timer id") );
- return true;
+ if ( timer.IsOneShot() )
+ timer.Stop();
+
+ timer.Notify();
}
-void wxTimer::Stop()
+
+LRESULT APIENTRY _EXPORT wxTimerWndProc(HWND hWnd, UINT message,
+ WPARAM wParam, LPARAM lParam)
{
- if ( m_id )
+ if ( message == WM_TIMER )
{
- ::KillTimer(NULL, m_id);
+ wxTimerMap::iterator node = TimerMap().find(wParam);
- g_timerMap.erase(m_id);
+ if ( node != TimerMap().end() )
+ {
+ wxProcessTimer(*(node->second));
+
+ return 0;
+ }
+ //else: Unknown timer, probably one of our timers that had fired just
+ // before being removed from the timers map by Stop().
}
- m_id = 0;
+ return ::DefWindowProc(hWnd, message, wParam, lParam);
}
// ----------------------------------------------------------------------------
-// private functions
+// wxTimerHiddenWindowModule functions
// ----------------------------------------------------------------------------
-void wxProcessTimer(wxTimer& timer)
-{
- wxASSERT_MSG( timer.m_id != 0, _T("bogus timer id") );
- if ( timer.IsOneShot() )
- timer.Stop();
+HWND wxTimerHiddenWindowModule::ms_hwnd = NULL;
- timer.Notify();
+const wxChar *wxTimerHiddenWindowModule::ms_className = NULL;
+
+bool wxTimerHiddenWindowModule::OnInit()
+{
+ // do not initialize ms_hwnd to ms_className to NULL here: it may happen
+ // that our GetHWND() is called before the modules are initialized if a
+ // timer is created from wxApp-derived class ctor and in this case we
+ // shouldn't overwrite it
+
+ return true;
}
-void WINAPI
-wxTimerProc(HWND WXUNUSED(hwnd),
- UINT WXUNUSED(msg),
- UINT idTimer,
- DWORD WXUNUSED(dwTime))
+void wxTimerHiddenWindowModule::OnExit()
{
- wxTimerMap::iterator node = g_timerMap.find((unsigned long)idTimer);
+ if ( ms_hwnd )
+ {
+ if ( !::DestroyWindow(ms_hwnd) )
+ {
+ wxLogLastError(wxT("DestroyWindow(wxTimerHiddenWindow)"));
+ }
- wxCHECK_RET( node != g_timerMap.end(), wxT("bogus timer id in wxTimerProc") );
+ ms_hwnd = NULL;
+ }
- wxProcessTimer(*(node->second));
+ if ( ms_className )
+ {
+ if ( !::UnregisterClass(ms_className, wxGetInstance()) )
+ {
+ wxLogLastError(wxT("UnregisterClass(\"wxTimerHiddenWindow\")"));
+ }
+
+ ms_className = NULL;
+ }
}
-#endif // wxUSE_TIMER
+/* static */
+HWND wxTimerHiddenWindowModule::GetHWND()
+{
+ static const wxChar *HIDDEN_WINDOW_CLASS = wxT("wxTimerHiddenWindow");
+ if ( !ms_hwnd )
+ {
+ ms_hwnd = wxCreateHiddenWindow(&ms_className, HIDDEN_WINDOW_CLASS,
+ wxTimerWndProc);
+ }
+
+ return ms_hwnd;
+}
+#endif // wxUSE_TIMER
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