X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d71cc120e315b27466cce577115b9bdf56b1ca55..350a44d9c0b439cfcfb08142403a6d34a069e3f4:/src/msw/display.cpp

diff --git a/src/msw/display.cpp b/src/msw/display.cpp
index ba43859eda..5dd3994788 100644
--- a/src/msw/display.cpp
+++ b/src/msw/display.cpp
@@ -3,6 +3,7 @@
 // Purpose:     MSW Implementation of wxDisplay class
 // Author:      Royce Mitchell III
 // Modified by: VZ (resolutions enumeration/change support, DirectDraw, ...)
+//		    Ryan Norton (IsPrimary override)
 // Created:     06/21/02
 // RCS-ID:      $Id$
 // Copyright:   (c) wxWidgets team
@@ -544,6 +545,30 @@ wxString wxDisplay::GetNameForEnumSettings() const
     return name;
 }
 
+// ----------------------------------------------------------------------------
+// determine if this is the primary display
+// ----------------------------------------------------------------------------
+
+bool wxDisplay::IsPrimary() const
+{
+    wxDisplayInfo& dpyInfo = (*gs_displays)[m_index];
+
+    MONITORINFOEX monInfo;
+    wxZeroMemory(monInfo);
+    monInfo.cbSize = sizeof(monInfo);
+
+    // NB: Cast from MONITORINFOEX* to MONITORINFO* is done because
+    //     Mingw headers - unlike the ones from Microsoft's Platform SDK -
+    //     don't derive the former from the latter in C++ mode and so
+    //     the pointer's type is not converted implicitly.
+    if ( !::GetMonitorInfo(dpyInfo.m_hmon, (LPMONITORINFO)&monInfo) )
+    {
+        wxLogLastError(_T("GetMonitorInfo"));
+    }
+
+    return (monInfo.dwFlags & MONITORINFOF_PRIMARY) == MONITORINFOF_PRIMARY;
+}
+
 // ----------------------------------------------------------------------------
 // video modes enumeration
 // ----------------------------------------------------------------------------