Test using wxString::ToCDouble() in wxAny.

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

diff --git a/src/msw/display.cpp b/src/msw/display.cpp
index cd5548c708144c58f7576c582877b32564e6cace..ae087f9cd94683fb6cfc7ba358d783a283ebe2ae 100644 (file)
--- a/src/msw/display.cpp
+++ b/src/msw/display.cpp
@@ -1,11 +1,12 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

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

 // Purpose:     MSW Implementation of wxDisplay class
 // Purpose:     MSW Implementation of wxDisplay class

-// Author:      Royce Mitchell III
-// Modified by:
+// Author:      Royce Mitchell III, Vadim Zeitlin
+// Modified by: Ryan Norton (IsPrimary override)

 // Created:     06/21/02
 // RCS-ID:      $Id$
 // Created:     06/21/02
 // RCS-ID:      $Id$

-// Copyright:   (c) wxWindows team
+// Copyright:   (c) wxWidgets team
+// Copyright:   (c) 2002-2006 wxWidgets team

 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 


@@ -17,10 +18,6 @@
 // headers
 // ---------------------------------------------------------------------------
 
 // headers
 // ---------------------------------------------------------------------------
 

-#ifdef __GNUG__
-    #pragma implementation "display.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"
 


@@ -30,203 +27,615 @@
 
 #if wxUSE_DISPLAY
 
 
 #if wxUSE_DISPLAY
 

+#include "wx/display.h"
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

-   #include "wx/dynarray.h"
+    #include "wx/dynarray.h"
+    #include "wx/app.h"
+    #include "wx/frame.h"

 #endif
 
 #endif
 

-#include "wx/display.h"
+#include "wx/dynlib.h"
+#include "wx/sysopt.h"
+
+#include "wx/display_impl.h"
+#include "wx/msw/wrapwin.h"
+#include "wx/msw/missing.h"
+#include "wx/msw/private.h"
+#include "wx/msw/private/hiddenwin.h"
+
+#ifndef __WXWINCE__
+    // Older versions of windef.h don't define HMONITOR.  Unfortunately, we
+    // can't directly test whether HMONITOR is defined or not in windef.h as
+    // it's not a macro but a typedef, so we test for an unrelated symbol which
+    // is only defined in winuser.h if WINVER >= 0x0500
+    #if !defined(HMONITOR_DECLARED) && !defined(MNS_NOCHECK)
+        DECLARE_HANDLE(HMONITOR);
+        typedef BOOL(CALLBACK * MONITORENUMPROC )(HMONITOR, HDC, LPRECT, LPARAM);
+        typedef struct tagMONITORINFO
+        {
+            DWORD   cbSize;
+            RECT    rcMonitor;
+            RECT    rcWork;
+            DWORD   dwFlags;
+        } MONITORINFO, *LPMONITORINFO;
+        typedef struct tagMONITORINFOEX : public tagMONITORINFO
+        {
+            TCHAR       szDevice[CCHDEVICENAME];
+        } MONITORINFOEX, *LPMONITORINFOEX;
+        #define MONITOR_DEFAULTTONULL       0x00000000
+        #define MONITOR_DEFAULTTOPRIMARY    0x00000001
+        #define MONITOR_DEFAULTTONEAREST    0x00000002
+        #define MONITORINFOF_PRIMARY        0x00000001
+        #define HMONITOR_DECLARED
+    #endif
+#endif // !__WXWINCE__
+
+// display functions are found in different DLLs under WinCE and normal Win32
+#ifdef __WXWINCE__
+static const wxChar displayDllName[] = wxT("coredll.dll");
+#else
+static const wxChar displayDllName[] = wxT("user32.dll");
+#endif

 
 

-// the following define is necessary to access the multi-monitor function
-// declarations in a manner safe to use w/ Windows 95
-// JACS: not used for now until we're clear about the legality
-// of distributing multimon.h. Meanwhile you can download the file
-// yourself from:
-// http://www.microsoft.com/msj/0697/monitor/monitortextfigs.htm#fig4
+// ----------------------------------------------------------------------------
+// typedefs for dynamically loaded Windows functions
+// ----------------------------------------------------------------------------

 
 

-#if 0
-#define COMPILE_MULTIMON_STUBS
-#include "wx/msw/multimon.h"
-#endif
+typedef LONG (WINAPI *ChangeDisplaySettingsEx_t)(LPCTSTR lpszDeviceName,
+                                                 LPDEVMODE lpDevMode,
+                                                 HWND hwnd,
+                                                 DWORD dwFlags,
+                                                 LPVOID lParam);
+
+typedef BOOL (WINAPI *EnumDisplayMonitors_t)(HDC,LPCRECT,MONITORENUMPROC,LPARAM);
+typedef HMONITOR (WINAPI *MonitorFromPoint_t)(POINT,DWORD);
+typedef HMONITOR (WINAPI *MonitorFromWindow_t)(HWND,DWORD);
+typedef BOOL (WINAPI *GetMonitorInfo_t)(HMONITOR,LPMONITORINFO);
+
+#ifndef __WXWINCE__
+// emulation of ChangeDisplaySettingsEx() for Win95
+LONG WINAPI ChangeDisplaySettingsExForWin95(LPCTSTR WXUNUSED(lpszDeviceName),
+                                            LPDEVMODE lpDevMode,
+                                            HWND WXUNUSED(hwnd),
+                                            DWORD dwFlags,
+                                            LPVOID WXUNUSED(lParam))
+{
+    return ::ChangeDisplaySettings(lpDevMode, dwFlags);
+}
+#endif // !__WXWINCE__

 
 

-// ---------------------------------------------------------------------------
-// constants
-// ---------------------------------------------------------------------------

 
 

-// ---------------------------------------------------------------------------
-// private functions
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxDisplayMSW declaration
+// ----------------------------------------------------------------------------
+
+class wxDisplayMSW : public wxDisplayImpl
+{
+public:
+    wxDisplayMSW(unsigned n, HMONITOR hmon)
+        : wxDisplayImpl(n),
+          m_hmon(hmon)
+    {
+    }
+
+    virtual wxRect GetGeometry() const;
+    virtual wxRect GetClientArea() const;
+    virtual wxString GetName() const;
+    virtual bool IsPrimary() const;
+
+    virtual wxVideoMode GetCurrentMode() const;
+    virtual wxArrayVideoModes GetModes(const wxVideoMode& mode) const;
+    virtual bool ChangeMode(const wxVideoMode& mode);
+
+protected:
+    // convert a DEVMODE to our wxVideoMode
+    static wxVideoMode ConvertToVideoMode(const DEVMODE& dm)
+    {
+        // note that dmDisplayFrequency may be 0 or 1 meaning "standard one"
+        // and although 0 is ok for us we don't want to return modes with 1hz
+        // refresh
+        return wxVideoMode(dm.dmPelsWidth,
+                           dm.dmPelsHeight,
+                           dm.dmBitsPerPel,
+                           dm.dmDisplayFrequency > 1 ? dm.dmDisplayFrequency : 0);
+    }
+
+    // Call GetMonitorInfo() and fill in the provided struct and return true if
+    // it succeeded, otherwise return false.
+    bool GetMonInfo(MONITORINFOEX& monInfo) const;
+
+    HMONITOR m_hmon;
+
+private:
+    wxDECLARE_NO_COPY_CLASS(wxDisplayMSW);
+};

 
 

-void wxmswInitDisplayRectArray();

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

-// private classes
+// wxDisplayFactoryMSW declaration

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

-class wxmswDisplayInfo;
+WX_DEFINE_ARRAY(HMONITOR, wxMonitorHandleArray);

 
 

-WX_DECLARE_OBJARRAY(wxmswDisplayInfo, wxmswDisplayInfoArray);
+// functions dynamically bound by wxDisplayFactoryMSW ctor.
+static MonitorFromPoint_t gs_MonitorFromPoint = NULL;
+static MonitorFromWindow_t gs_MonitorFromWindow = NULL;
+static GetMonitorInfo_t gs_GetMonitorInfo = NULL;
+static EnumDisplayMonitors_t gs_EnumDisplayMonitors = NULL;

 
 

-class wxmswDisplayInfo
+class wxDisplayFactoryMSW : public wxDisplayFactory

 {
 public:
 {
 public:

-       HMONITOR m_hmon;
-    DISPLAY_DEVICE m_dd;
-    wxRect m_rect;
-    int m_depth;
+    // ctor checks if the current system supports multimon API and dynamically
+    // bind the functions we need if this is the case and fills the
+    // m_displays array if they're available
+    wxDisplayFactoryMSW();
+
+    // Dtor destroys the hidden window we use for getting WM_SETTINGCHANGE.
+    virtual ~wxDisplayFactoryMSW();
+
+    bool IsOk() const { return !m_displays.empty(); }
+
+    virtual wxDisplayImpl *CreateDisplay(unsigned n);
+    virtual unsigned GetCount() { return unsigned(m_displays.size()); }
+    virtual int GetFromPoint(const wxPoint& pt);
+    virtual int GetFromWindow(const wxWindow *window);
+
+    // Called when we receive WM_SETTINGCHANGE to refresh the list of monitor
+    // handles.
+    static void RefreshMonitors() { ms_factory->DoRefreshMonitors(); }
+
+
+private:
+    // EnumDisplayMonitors() callback
+    static BOOL CALLBACK MultimonEnumProc(HMONITOR hMonitor,
+                                          HDC hdcMonitor,
+                                          LPRECT lprcMonitor,
+                                          LPARAM dwData);
+
+    // find the monitor corresponding to the given handle,
+    // return wxNOT_FOUND if not found
+    int FindDisplayFromHMONITOR(HMONITOR hmon) const;
+
+    // Update m_displays array, used by RefreshMonitors().
+    void DoRefreshMonitors();
+
+
+    // The unique factory being used (as we don't have direct access to the
+    // global factory pointer in the common code so we just duplicate this
+    // variable (also making it of correct type for us) here).
+    static wxDisplayFactoryMSW* ms_factory;
+
+
+    // the array containing information about all available displays, filled by
+    // MultimonEnumProc()
+    wxMonitorHandleArray m_displays;
+
+    // The hidden window we use for receiving WM_SETTINGCHANGE and its class
+    // name.
+    HWND m_hiddenHwnd;
+    const wxChar* m_hiddenClass;
+
+    wxDECLARE_NO_COPY_CLASS(wxDisplayFactoryMSW);

 };
 
 };
 

-wxmswDisplayInfoArray* g_wxmswDisplayInfoArray = 0;
+wxDisplayFactoryMSW* wxDisplayFactoryMSW::ms_factory = NULL;

 
 

-#include <wx/arrimpl.cpp> // this is a magic incantation which must be done!
-WX_DEFINE_OBJARRAY(wxmswDisplayInfoArray);
+// ----------------------------------------------------------------------------
+// wxDisplay implementation
+// ----------------------------------------------------------------------------

 
 

-// ===========================================================================
-// implementation
-// ===========================================================================
+/* static */ wxDisplayFactory *wxDisplay::CreateFactory()
+{
+    wxDisplayFactoryMSW *factoryMM = new wxDisplayFactoryMSW;
+
+    if ( factoryMM->IsOk() )
+        return factoryMM;

 
 

-BOOL CALLBACK wxmswMonitorEnumProc (
-  HMONITOR hMonitor,  // handle to display monitor
-  HDC hdcMonitor,     // handle to monitor-appropriate device context
-  LPRECT lprcMonitor, // pointer to monitor intersection rectangle
-  LPARAM dwData       // data passed from EnumDisplayMonitors
-)
+    delete factoryMM;
+
+    // fall back to a stub implementation if no multimon support (Win95?)
+    return new wxDisplayFactorySingle;
+}
+
+
+// ----------------------------------------------------------------------------
+// wxDisplayMSW implementation
+// ----------------------------------------------------------------------------
+
+bool wxDisplayMSW::GetMonInfo(MONITORINFOEX& monInfo) const

 {
 {

-    wxmswDisplayInfo* info = new wxmswDisplayInfo();
-    info->m_hmon = hMonitor;
-    info->m_rect.SetX ( lprcMonitor->left );
-    info->m_rect.SetY ( lprcMonitor->top );
-    info->m_rect.SetWidth ( lprcMonitor->right - lprcMonitor->left );
-    info->m_rect.SetHeight ( lprcMonitor->bottom - lprcMonitor->top );
-    // now add this monitor to the array
-    g_wxmswDisplayInfoArray->Add ( info );
+    if ( !gs_GetMonitorInfo(m_hmon, &monInfo) )
+    {
+        wxLogLastError(wxT("GetMonitorInfo"));
+        return false;
+    }

 
 

-    return TRUE; // continue the enumeration
+    return true;

 }
 
 }
 

-class wxmswDisplayModule : public wxModule
+wxRect wxDisplayMSW::GetGeometry() const

 {
 {

-    DECLARE_DYNAMIC_CLASS(wxmswDisplayModule)
-public:
-    wxmswDisplayModule() {}
-    bool OnInit();
-    void OnExit();
-};
+    WinStruct<MONITORINFOEX> monInfo;
+
+    wxRect rect;
+    if ( GetMonInfo(monInfo) )
+        wxCopyRECTToRect(monInfo.rcMonitor, rect);
+
+    return rect;
+}
+
+wxRect wxDisplayMSW::GetClientArea() const
+{
+    WinStruct<MONITORINFOEX> monInfo;
+
+    wxRect rectClient;
+    if ( GetMonInfo(monInfo) )
+        wxCopyRECTToRect(monInfo.rcWork, rectClient);
+
+    return rectClient;
+}
+
+wxString wxDisplayMSW::GetName() const
+{
+    WinStruct<MONITORINFOEX> monInfo;
+
+    wxString name;
+    if ( GetMonInfo(monInfo) )
+        name = monInfo.szDevice;
+
+    return name;
+}
+
+bool wxDisplayMSW::IsPrimary() const
+{
+    WinStruct<MONITORINFOEX> monInfo;
+
+    if ( !GetMonInfo(monInfo) )
+        return false;

 
 

-IMPLEMENT_DYNAMIC_CLASS(wxmswDisplayModule, wxModule)
+    return (monInfo.dwFlags & MONITORINFOF_PRIMARY) != 0;
+}

 
 

-bool wxmswDisplayModule::OnInit()
+wxVideoMode wxDisplayMSW::GetCurrentMode() const

 {
 {

-    g_wxmswDisplayInfoArray = new wxmswDisplayInfoArray();
-    if ( !g_wxmswDisplayInfoArray )
+    wxVideoMode mode;
+
+    // The first parameter of EnumDisplaySettings() must be NULL under Win95
+    // according to MSDN.  The version of GetName() we implement for Win95
+    // returns an empty string.
+    const wxString name = GetName();
+    const wxChar * const deviceName = name.empty()
+                                          ? (const wxChar*)NULL
+                                          : (const wxChar*)name.c_str();
+
+    DEVMODE dm;
+    dm.dmSize = sizeof(dm);
+    dm.dmDriverExtra = 0;
+
+    if ( !::EnumDisplaySettings(deviceName, ENUM_CURRENT_SETTINGS, &dm) )
+    {
+        wxLogLastError(wxT("EnumDisplaySettings(ENUM_CURRENT_SETTINGS)"));
+    }
+    else

     {
     {

-        wxFAIL_MSG(wxT("Couldn't allocate array for display information"));
-        return FALSE;
+        mode = ConvertToVideoMode(dm);

     }
 
     }
 

-    // Royce3: I'm assuming that the monitor's are enumerated in the same
-    // order as the calls to EnumDisplayDevices below. We shall soon see
-    // if that assumption is correct.
-    if ( !EnumDisplayMonitors ( NULL, NULL, wxmswMonitorEnumProc, 0 ) )
-        wxLogLastError(wxT("EnumDisplayMonitors"));
+    return mode;
+}

 
 

-    size_t iDevNum = 0, count = g_wxmswDisplayInfoArray->Count();
-    while ( iDevNum < count )
+wxArrayVideoModes wxDisplayMSW::GetModes(const wxVideoMode& modeMatch) const
+{
+    wxArrayVideoModes modes;
+
+    // The first parameter of EnumDisplaySettings() must be NULL under Win95
+    // according to MSDN.  The version of GetName() we implement for Win95
+    // returns an empty string.
+    const wxString name = GetName();
+    const wxChar * const deviceName = name.empty()
+                                            ? (const wxChar*)NULL
+                                            : (const wxChar*)name.c_str();
+
+    DEVMODE dm;
+    dm.dmSize = sizeof(dm);
+    dm.dmDriverExtra = 0;
+
+    for ( int iModeNum = 0;
+          ::EnumDisplaySettings(deviceName, iModeNum, &dm);
+          iModeNum++ )

     {
     {

-        wxmswDisplayInfo& info = (*g_wxmswDisplayInfoArray)[iDevNum];
+        const wxVideoMode mode = ConvertToVideoMode(dm);
+        if ( mode.Matches(modeMatch) )
+        {
+            modes.Add(mode);
+        }
+    }

 
 

-        // MSDN: Before calling EnumDisplayDevices, you must initialize the cb
-        // member of DISPLAY_DEVICE to the size, in bytes, of DISPLAY_DEVICE
-        info.m_dd.cb = sizeof(info.m_dd);
+    return modes;
+}

 
 

-        if ( !EnumDisplayDevices ( NULL, iDevNum, &info.m_dd, 0 ) )
-            wxLogLastError(wxT("EnumDisplayDevices"));
+bool wxDisplayMSW::ChangeMode(const wxVideoMode& mode)
+{
+    // prepare ChangeDisplaySettingsEx() parameters
+    DEVMODE dm;
+    DEVMODE *pDevMode;

 
 

-        // get this display's Depth
-        DEVMODE devmode;
-        memset ( &devmode, 0, sizeof(devmode) );
+    int flags;

 
 

-        // MSDN: Before calling EnumDisplaySettings, set the dmSize member to
-        // sizeof(DEVMODE), and set the dmDriverExtra member to indicate the size,
-        // in bytes, of the additional space available to receive private
-        // driver-data.
-        devmode.dmSize = sizeof(devmode);
-        devmode.dmDriverExtra = 0;
+    if ( mode == wxDefaultVideoMode )
+    {
+        // reset the video mode to default
+        pDevMode = NULL;
+        flags = 0;
+    }
+    else // change to the given mode
+    {
+        wxCHECK_MSG( mode.GetWidth() && mode.GetHeight(), false,
+                        wxT("at least the width and height must be specified") );

 
 

-        if ( !EnumDisplaySettings ( info.m_dd.DeviceName, ENUM_CURRENT_SETTINGS, &devmode ) )
+        wxZeroMemory(dm);
+        dm.dmSize = sizeof(dm);
+        dm.dmDriverExtra = 0;
+        dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
+        dm.dmPelsWidth = mode.GetWidth();
+        dm.dmPelsHeight = mode.GetHeight();
+
+        if ( mode.GetDepth() )

         {
         {

-            wxLogLastError(wxT("EnumDisplaySettings"));
-            devmode.dmFields = 0;
+            dm.dmFields |= DM_BITSPERPEL;
+            dm.dmBitsPerPel = mode.GetDepth();

         }
 
         }
 

-        if ( !(devmode.dmFields&DM_BITSPERPEL) )
-            info.m_depth = -1;
-        else
-            info.m_depth = devmode.dmBitsPerPel;
+        if ( mode.GetRefresh() )
+        {
+            dm.dmFields |= DM_DISPLAYFREQUENCY;
+            dm.dmDisplayFrequency = mode.GetRefresh();
+        }

 
 

+        pDevMode = &dm;

 
 

-        iDevNum++;
+#ifdef __WXWINCE__
+        flags = 0;
+#else // !__WXWINCE__
+        flags = CDS_FULLSCREEN;
+#endif // __WXWINCE__/!__WXWINCE__

     }
     }

-    return TRUE;
+
+
+    // get pointer to the function dynamically
+    //
+    // we're only called from the main thread, so it's ok to use static
+    // variable
+    static ChangeDisplaySettingsEx_t pfnChangeDisplaySettingsEx = NULL;
+    if ( !pfnChangeDisplaySettingsEx )
+    {
+        wxDynamicLibrary dllDisplay(displayDllName, wxDL_VERBATIM | wxDL_QUIET);
+        if ( dllDisplay.IsLoaded() )
+        {
+            wxDL_INIT_FUNC_AW(pfn, ChangeDisplaySettingsEx, dllDisplay);
+        }
+        //else: huh, no this DLL must always be present, what's going on??
+
+#ifndef __WXWINCE__
+        if ( !pfnChangeDisplaySettingsEx )
+        {
+            // we must be under Win95 and so there is no multiple monitors
+            // support anyhow
+            pfnChangeDisplaySettingsEx = ChangeDisplaySettingsExForWin95;
+        }
+#endif // !__WXWINCE__
+    }
+
+    // do change the mode
+    switch ( pfnChangeDisplaySettingsEx
+             (
+                GetName().t_str(),  // display name
+                pDevMode,           // dev mode or NULL to reset
+                NULL,               // reserved
+                flags,
+                NULL                // pointer to video parameters (not used)
+             ) )
+    {
+        case DISP_CHANGE_SUCCESSFUL:
+            // ok
+            {
+                // If we have a top-level, full-screen frame, emulate
+                // the DirectX behaviour and resize it.  This makes this
+                // API quite a bit easier to use.
+                wxWindow *winTop = wxTheApp->GetTopWindow();
+                wxFrame *frameTop = wxDynamicCast(winTop, wxFrame);
+                if (frameTop && frameTop->IsFullScreen())
+                {
+                    wxVideoMode current = GetCurrentMode();
+                    frameTop->SetClientSize(current.GetWidth(), current.GetHeight());
+                }
+            }
+            return true;
+
+        case DISP_CHANGE_BADMODE:
+            // don't complain about this, this is the only "expected" error
+            break;
+
+        default:
+            wxFAIL_MSG( wxT("unexpected ChangeDisplaySettingsEx() return value") );
+    }
+
+    return false;

 }
 
 }
 

-void wxmswDisplayModule::OnExit()
+
+// ----------------------------------------------------------------------------
+// wxDisplayFactoryMSW implementation
+// ----------------------------------------------------------------------------
+
+LRESULT APIENTRY
+wxDisplayWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)

 {
 {

-    size_t count = g_wxmswDisplayInfoArray->Count();
-    while ( count-- )
+    if ( msg == WM_SETTINGCHANGE )

     {
     {

-        wxmswDisplayInfo* info = g_wxmswDisplayInfoArray->Detach ( count );
-        delete info;
+        wxDisplayFactoryMSW::RefreshMonitors();
+
+        return 0;

     }
     }

-    delete g_wxmswDisplayInfoArray;
-    g_wxmswDisplayInfoArray = 0;
-}

 
 

-// ---------------------------------------------------------------------------
-// wxDisplay
-// ---------------------------------------------------------------------------
+    return ::DefWindowProc(hwnd, msg, wParam, lParam);
+}

 
 

-size_t wxDisplayBase::GetCount()
+wxDisplayFactoryMSW::wxDisplayFactoryMSW()

 {
 {

-    return GetSystemMetrics ( SM_CMONITORS );
+    // This is not supposed to happen with the current code, the factory is
+    // implicitly a singleton.
+    wxASSERT_MSG( !ms_factory, wxS("Using more than one factory?") );
+
+    ms_factory = this;
+
+    m_hiddenHwnd = NULL;
+    m_hiddenClass = NULL;
+
+    if ( gs_MonitorFromPoint==NULL || gs_MonitorFromWindow==NULL
+         || gs_GetMonitorInfo==NULL || gs_EnumDisplayMonitors==NULL )
+    {
+        // First initialization, or last initialization failed.
+        wxDynamicLibrary dllDisplay(displayDllName, wxDL_VERBATIM | wxDL_QUIET);
+
+        wxDL_INIT_FUNC(gs_, MonitorFromPoint, dllDisplay);
+        wxDL_INIT_FUNC(gs_, MonitorFromWindow, dllDisplay);
+        wxDL_INIT_FUNC_AW(gs_, GetMonitorInfo, dllDisplay);
+        wxDL_INIT_FUNC(gs_, EnumDisplayMonitors, dllDisplay);
+
+        // we can safely let dllDisplay go out of scope, the DLL itself will
+        // still remain loaded as all programs link to it statically anyhow
+    }
+
+    if ( gs_MonitorFromPoint==NULL || gs_MonitorFromWindow==NULL
+         || gs_GetMonitorInfo==NULL || gs_EnumDisplayMonitors==NULL )
+        return;
+
+    DoRefreshMonitors();
+
+    // Also create a hidden window to listen for WM_SETTINGCHANGE that we
+    // receive when a monitor is added to or removed from the system as we must
+    // refresh our monitor handles information then.
+    m_hiddenHwnd = wxCreateHiddenWindow
+                   (
+                    &m_hiddenClass,
+                    wxT("wxDisplayHiddenWindow"),
+                    wxDisplayWndProc
+                   );

 }
 
 }
 

-int wxDisplayBase::GetFromPoint ( const wxPoint& pt )
+wxDisplayFactoryMSW::~wxDisplayFactoryMSW()

 {
 {

-    POINT pt2;
-    pt2.x = pt.x;
-    pt2.y = pt.y;
+    if ( m_hiddenHwnd )
+    {
+        if ( !::DestroyWindow(m_hiddenHwnd) )
+        {
+            wxLogLastError(wxT("DestroyWindow(wxDisplayHiddenWindow)"));
+        }
+
+        if ( m_hiddenClass )
+        {
+            if ( !::UnregisterClass(m_hiddenClass, wxGetInstance()) )
+            {
+                wxLogLastError(wxT("UnregisterClass(wxDisplayHiddenWindow)"));
+            }
+        }
+    }

 
 

-    HMONITOR hmon = MonitorFromPoint ( pt2, 0 );
-    if ( !hmon )
-        return -1;
-    size_t count = wxDisplayBase::GetCount(), index;
+    ms_factory = NULL;
+}

 
 

-    for ( index = 0; index < count; index++ )
+void wxDisplayFactoryMSW::DoRefreshMonitors()
+{
+    m_displays.Clear();
+
+    if ( !gs_EnumDisplayMonitors(NULL, NULL, MultimonEnumProc, (LPARAM)this) )

     {
     {

-        if ( hmon == (*g_wxmswDisplayInfoArray)[index].m_hmon )
-            return index;
+        wxLogLastError(wxT("EnumDisplayMonitors"));

     }
     }

+}
+
+/* static */
+BOOL CALLBACK
+wxDisplayFactoryMSW::MultimonEnumProc(
+    HMONITOR hMonitor,              // handle to display monitor
+    HDC WXUNUSED(hdcMonitor),       // handle to monitor-appropriate device context
+    LPRECT WXUNUSED(lprcMonitor),   // pointer to monitor intersection rectangle
+    LPARAM dwData)                  // data passed from EnumDisplayMonitors (this)
+{
+    wxDisplayFactoryMSW *const self = (wxDisplayFactoryMSW *)dwData;

 
 

-    return -1;
+    self->m_displays.Add(hMonitor);
+
+    // continue the enumeration
+    return TRUE;

 }
 
 }
 

-wxDisplay::wxDisplay ( size_t index ) : wxDisplayBase ( index )
+wxDisplayImpl *wxDisplayFactoryMSW::CreateDisplay(unsigned n)

 {
 {

+    wxCHECK_MSG( n < m_displays.size(), NULL, wxT("An invalid index was passed to wxDisplay") );
+
+    return new wxDisplayMSW(n, m_displays[n]);

 }
 
 }
 

-wxRect wxDisplay::GetGeometry() const
+// helper for GetFromPoint() and GetFromWindow()
+int wxDisplayFactoryMSW::FindDisplayFromHMONITOR(HMONITOR hmon) const

 {
 {

-    return (*g_wxmswDisplayInfoArray)[m_index].m_rect;
+    if ( hmon )
+    {
+        const size_t count = m_displays.size();
+        for ( size_t n = 0; n < count; n++ )
+        {
+            if ( hmon == m_displays[n] )
+                return n;
+        }
+    }
+
+    return wxNOT_FOUND;

 }
 
 }
 

-int wxDisplay::GetDepth() const
+int wxDisplayFactoryMSW::GetFromPoint(const wxPoint& pt)

 {
 {

-    return (*g_wxmswDisplayInfoArray)[m_index].m_depth;
+    POINT pt2;
+    pt2.x = pt.x;
+    pt2.y = pt.y;
+
+    return FindDisplayFromHMONITOR(gs_MonitorFromPoint(pt2,
+                                                       MONITOR_DEFAULTTONULL));

 }
 
 }
 

-wxString wxDisplay::GetName() const
+int wxDisplayFactoryMSW::GetFromWindow(const wxWindow *window)

 {
 {

-    return wxString ( (*g_wxmswDisplayInfoArray)[m_index].m_dd.DeviceName );
+#ifdef __WXMSW__
+    return FindDisplayFromHMONITOR(gs_MonitorFromWindow(GetHwndOf(window),
+                                                        MONITOR_DEFAULTTONULL));
+#else
+    const wxSize halfsize = window->GetSize() / 2;
+    wxPoint pt = window->GetScreenPosition();
+    pt.x += halfsize.x;
+    pt.y += halfsize.y;
+    return GetFromPoint(pt);
+#endif

 }
 
 }
 

-#endif//wxUSE_DISPLAY
+#endif // wxUSE_DISPLAY
+
+void wxClientDisplayRect(int *x, int *y, int *width, int *height)
+{
+#if defined(__WXMICROWIN__)
+    *x = 0; *y = 0;
+    wxDisplaySize(width, height);
+#else
+    // Determine the desktop dimensions minus the taskbar and any other
+    // special decorations...
+    RECT r;
+
+    SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0);
+    if (x)      *x = r.left;
+    if (y)      *y = r.top;
+    if (width)  *width = r.right - r.left;
+    if (height) *height = r.bottom - r.top;
+#endif
+}