Use DPI Aware wxSystemParametersInfo

Require a wxWindow when requesting GetNonClientMetrics.
If no wxWindow is known, use wxTheApp->GetTopWindow().

include/wx/msw/private/metrics.h

@@ -10,6 +10,8 @@
 #ifndef _WX_MSW_PRIVATE_METRICS_H_
 #define _WX_MSW_PRIVATE_METRICS_H_
 
+#include "wx/msw/private.h"
+
 namespace wxMSWImpl
 {
 
@@ -20,10 +22,10 @@ namespace wxMSWImpl
 // in the future
 //
 // MT-safety: this function is only meant to be called from the main thread
-inline const NONCLIENTMETRICS& GetNonClientMetrics()
+inline const NONCLIENTMETRICS& GetNonClientMetrics(const wxWindow* win)
 {
     static WinStruct<NONCLIENTMETRICS> nm;
-    if ( !::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &nm, 0) )
+    if ( !wxSystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &nm, 0 , win) )
     {
 #if WINVER >= 0x0600
         // a new field has been added to NONCLIENTMETRICS under Vista, so
@@ -31,7 +33,7 @@ inline const NONCLIENTMETRICS& GetNonClientMetrics()
         // size incorporating this new value on an older system -- retry
         // without it
         nm.cbSize -= sizeof(int);
-        if ( !::SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &nm, 0) )
+        if ( !wxSystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &nm, 0, win) )
 #endif // WINVER >= 0x0600
         {
             // maybe we should initialize the struct with some defaults?

src/msw/menuitem.cpp

@@ -363,7 +363,7 @@ void MenuDrawData::Init()
     else
 #endif // wxUSE_UXTHEME
     {
-        const NONCLIENTMETRICS& metrics = wxMSWImpl::GetNonClientMetrics();
+        const NONCLIENTMETRICS& metrics = wxMSWImpl::GetNonClientMetrics(window);
 
         CheckMargin.cxLeftWidth =
         CheckMargin.cxRightWidth  = wxGetSystemMetrics(SM_CXEDGE, window);

src/msw/msgdlg.cpp

@@ -396,7 +396,8 @@ void wxMessageDialog::AdjustButtonLabels()
 /* static */
 wxFont wxMessageDialog::GetMessageFont()
 {
-    const NONCLIENTMETRICS& ncm = wxMSWImpl::GetNonClientMetrics();
+    const wxWindow* win = wxTheApp ? wxTheApp->GetTopWindow() : NULL;
+    const NONCLIENTMETRICS& ncm = wxMSWImpl::GetNonClientMetrics(win);
     return wxNativeFontInfo(ncm.lfMessageFont);
 }
 

src/msw/settings.cpp

@@ -26,6 +26,7 @@
 #include "wx/settings.h"
 
 #ifndef WX_PRECOMP
+    #include "wx/app.h"
     #include "wx/utils.h"
     #include "wx/gdicmn.h"
     #include "wx/module.h"
@@ -181,8 +182,9 @@ wxFont wxSystemSettingsNative::GetFont(wxSystemFont index)
             // for most (simple) controls, e.g. buttons and such but other
             // controls may prefer to use lfStatusFont or lfCaptionFont if it
             // is more appropriate for them
+            const wxWindow* win = wxTheApp ? wxTheApp->GetTopWindow() : NULL;
             const wxNativeFontInfo
-                info(wxMSWImpl::GetNonClientMetrics().lfMessageFont);
+                info(wxMSWImpl::GetNonClientMetrics(win).lfMessageFont);
             gs_fontDefault = new wxFont(info);
         }
 
@@ -337,12 +339,14 @@ extern wxFont wxGetCCDefaultFont()
     // font which is also used for the icon titles and not the stock default
     // GUI font
     LOGFONT lf;
-    if ( ::SystemParametersInfo
+    const wxWindow* win = wxTheApp ? wxTheApp->GetTopWindow() : NULL;
+    if ( wxSystemParametersInfo
            (
                 SPI_GETICONTITLELOGFONT,
                 sizeof(lf),
                 &lf,
-                0
+                0,
+                win
            ) )
     {
         return wxFont(lf);