preserve type when loaded image is rescaled, #11543

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

diff --git a/src/msw/timer.cpp b/src/msw/timer.cpp
index d8cc8bd47283a5094e20b2a5d45123f08f742381..0db65998b1052be40bce756513de04237cad3d08 100644 (file)
--- a/src/msw/timer.cpp
+++ b/src/msw/timer.cpp
@@ -1,18 +1,14 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        timer.cpp
+// Name:        src/msw/timer.cpp

 // Purpose:     wxTimer implementation
 // Author:      Julian Smart
 // Purpose:     wxTimer implementation
 // Author:      Julian Smart

-// Modified by:
+// Modified by: Vadim Zeitlin (use hash map instead of list, global rewrite)

 // Created:     04/01/98
 // RCS-ID:      $Id$
 // Created:     04/01/98
 // RCS-ID:      $Id$

-// Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:    wxWindows license
+// Copyright:   (c) Julian Smart
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

-#ifdef __GNUG__
-    #pragma implementation "timer.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -20,132 +16,229 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

-#include "wx/window.h"
-#include "wx/msw/private.h"
+#if wxUSE_TIMER
+
+#include "wx/msw/private/timer.h"

 
 #ifndef WX_PRECOMP
 
 #ifndef WX_PRECOMP

-    #include "wx/setup.h"

     #include "wx/list.h"
     #include "wx/event.h"
     #include "wx/app.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
 
 #endif
 

-#include "wx/intl.h"
-#include "wx/log.h"
+#include "wx/msw/private.h"

 
 

-#include "wx/timer.h"
+// ----------------------------------------------------------------------------
+// private globals
+// ----------------------------------------------------------------------------

 
 

-#include <time.h>
-#include <sys/types.h>
+// define a hash containing all the timers: it is indexed by timer id and
+// contains the corresponding timer
+WX_DECLARE_HASH_MAP(WPARAM, wxMSWTimerImpl *, wxIntegerHash, wxIntegerEqual,
+                    wxTimerMap);

 
 

-#if !defined(__SC__) && !defined(__GNUWIN32__) && !defined(__MWERKS__)
-    #include <sys/timeb.h>
-#endif
+// 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;
+}

 
 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------
 
 
 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------
 

-wxList wxTimerList(wxKEY_INTEGER);
-UINT WINAPI _EXPORT wxTimerProc(HWND hwnd, WORD, int idTimer, DWORD);
+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)

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-#ifdef __WIN32__
-    #define _EXPORT /**/
-#else
-    #define _EXPORT _export
-#endif
+class wxTimerHiddenWindowModule : public wxModule
+{
+public:
+    // module init/finalize
+    virtual bool OnInit();
+    virtual void OnExit();

 
 

-#if !USE_SHARED_LIBRARY
-    IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxObject)
-#endif
+    // 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
 // ============================================================================
 
 
 // ============================================================================
 // implementation
 // ============================================================================
 

+

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-// wxTimer class
+// wxMSWTimerImpl class

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-wxTimer::wxTimer(void)
+
+bool wxMSWTimerImpl::Start(int milliseconds, bool oneShot)

 {
 {

-    milli = 0 ;
-    lastMilli = -1 ;
-    id = 0;
+    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
+        );
+
+    if ( !m_id )
+    {
+        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
+    //
+    // 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."));
+
+        ::KillTimer(wxTimerHiddenWindowModule::GetHWND(), m_id);
+        m_id = 0;
+
+        return false;
+    }
+
+    TimerMap()[m_id] = this;
+
+    return true;

 }
 
 }
 

-wxTimer::~wxTimer(void)
+void wxMSWTimerImpl::Stop()

 {
 {

-    Stop();
+    wxASSERT_MSG( m_id, wxT("should be running") );
+
+    ::KillTimer(wxTimerHiddenWindowModule::GetHWND(), m_id);
+
+    TimerMap().erase(m_id);

 
 

-    wxTimerList.DeleteObject(this);
+    m_id = 0;

 }
 
 }
 

-bool wxTimer::Start(int milliseconds, bool mode)
+// ----------------------------------------------------------------------------
+// private functions
+// ----------------------------------------------------------------------------
+
+void wxProcessTimer(wxMSWTimerImpl& timer)

 {
 {

-    oneShot = mode ;
-    if (milliseconds < 0)
-        milliseconds = lastMilli;
+    wxASSERT_MSG( timer.IsRunning(), wxT("bogus timer id") );

 
 

-    wxCHECK_MSG( milliseconds > 0, FALSE, T("invalid value for timer timeour") );
+    if ( timer.IsOneShot() )
+        timer.Stop();

 
 

-    lastMilli = milli = milliseconds;
+    timer.Notify();
+}

 
 

-    wxTimerList.DeleteObject(this);
-    TIMERPROC wxTimerProcInst = (TIMERPROC)
-        MakeProcInstance((FARPROC)wxTimerProc, wxGetInstance());

 
 

-    id = SetTimer(NULL, (UINT)(id ? id : 1),
-                  (UINT)milliseconds, wxTimerProcInst);
-    if (id > 0)
+LRESULT APIENTRY _EXPORT wxTimerWndProc(HWND hWnd, UINT message,
+                                        WPARAM wParam, LPARAM lParam)
+{
+    if ( message == WM_TIMER )

     {
     {

-        wxTimerList.Append(id, this);
+        wxTimerMap::iterator node = TimerMap().find(wParam);
+
+        wxCHECK_MSG( node != TimerMap().end(), 0, wxT("bogus timer id in wxTimerProc") );

 
 

-        return TRUE;
+        wxProcessTimer(*(node->second));

     }
     else
     {
     }
     else
     {

-        wxLogSysError(_("Couldn't create a timer"));
-
-        return FALSE;
+        return ::DefWindowProc(hWnd, message, wParam, lParam);

     }
     }

-}
-
-void wxTimer::Stop(void)
-{
-    if (id) {
-        KillTimer(NULL, (UINT)id);
-        wxTimerList.DeleteObject(this); /* @@@@ */
-    }
-    id = 0 ;
-    milli = 0 ;
+    return 0;

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------

-// private functions
+// wxTimerHiddenWindowModule functions

 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------

-void wxProcessTimer(wxTimer& timer)
-{
-    // Avoid to process spurious timer events
-    if ( timer.id == 0)
-        return;

 
 

-    if ( timer.oneShot )
-        timer.Stop();

 
 

-    timer.Notify();
+HWND wxTimerHiddenWindowModule::ms_hwnd = NULL;
+
+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;

 }
 
 }
 

-UINT WINAPI _EXPORT wxTimerProc(HWND WXUNUSED(hwnd), WORD, int idTimer, DWORD)
+void wxTimerHiddenWindowModule::OnExit()

 {
 {

-    wxNode *node = wxTimerList.Find((long)idTimer);
+    if ( ms_hwnd )
+    {
+        if ( !::DestroyWindow(ms_hwnd) )
+        {
+            wxLogLastError(wxT("DestroyWindow(wxTimerHiddenWindow)"));
+        }
+
+        ms_hwnd = NULL;
+    }

 
 

-    wxCHECK_MSG( node, 0, T("bogus timer id in wxTimerProc") );
+    if ( ms_className )
+    {
+        if ( !::UnregisterClass(ms_className, wxGetInstance()) )
+        {
+            wxLogLastError(wxT("UnregisterClass(\"wxTimerHiddenWindow\")"));
+        }

 
 

-    wxProcessTimer(*(wxTimer *)node->Data());
+        ms_className = NULL;
+    }
+}

 
 

-    return 0;
+/* 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