wxDisplayFactoryMSW::wxDisplayFactoryMSW()
{
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;
// enumerate all displays
if ( !gs_EnumDisplayMonitors(NULL, NULL, MultimonEnumProc, (LPARAM)this) )
{
wxLogLastError(wxT("EnumDisplayMonitors"));
}
}
wxDisplayFactoryWin32Base::wxDisplayFactoryWin32Base()
{
if ( ms_supportsMultimon == -1 )
{
ms_supportsMultimon = 0;
wxDynamicLibrary dllDisplay(displayDllName, wxDL_VERBATIM | wxDL_QUIET);
if ( (wxDL_INIT_FUNC(gs_, MonitorFromPoint, dllDisplay)) == NULL ||
(wxDL_INIT_FUNC(gs_, MonitorFromWindow, dllDisplay)) == NULL ||
(wxDL_INIT_FUNC_AW(gs_, GetMonitorInfo, dllDisplay)) == NULL )
return;
ms_supportsMultimon = 1;
// we can safely let dllDisplay go out of scope, the DLL itself will
// still remain loaded as all programs link to it statically anyhow
}
}
wxDisplayFactoryMSW::wxDisplayFactoryMSW()
{
// 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
);
}
wxDisplayFactoryMultimon::wxDisplayFactoryMultimon()
{
if ( !ms_supportsMultimon )
return;
// look up EnumDisplayMonitors() which we don't need with DirectDraw
// implementation
EnumDisplayMonitors_t pfnEnumDisplayMonitors;
{
wxDynamicLibrary dllDisplay(displayDllName, wxDL_VERBATIM | wxDL_QUIET);
if ( (wxDL_INIT_FUNC(pfn, EnumDisplayMonitors, dllDisplay)) == NULL )
return;
}
// enumerate all displays
if ( !pfnEnumDisplayMonitors(NULL, NULL, MultimonEnumProc, (LPARAM)this) )
{
wxLogLastError(wxT("EnumDisplayMonitors"));
}
}
bool wxDisplayImplMultimon::ChangeMode(const wxVideoMode& mode)
{
// prepare ChangeDisplaySettingsEx() parameters
DEVMODE dm;
DEVMODE *pDevMode;
int flags;
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") );
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() )
{
dm.dmFields |= DM_BITSPERPEL;
dm.dmBitsPerPel = mode.GetDepth();
}
if ( mode.GetRefresh() )
{
dm.dmFields |= DM_DISPLAYFREQUENCY;
dm.dmDisplayFrequency = mode.GetRefresh();
}
pDevMode = &dm;
#ifdef __WXWINCE__
flags = 0;
#else // !__WXWINCE__
flags = CDS_FULLSCREEN;
#endif // __WXWINCE__/!__WXWINCE__
}
// 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().wx_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 behavior 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;
}
