application file-icon and window-icon set on ms-windows

src/qtviewer/resources/qt_res.rc

@@ -0,0 +1,37 @@
+// Microsoft Visual C++ generated resource script.
+//
+#include "resource.h"
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE 
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE 
+BEGIN
+    "\0"
+END
+
+3 TEXTINCLUDE 
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Icon
+//
+
+// Icon with lowest ID value placed first to ensure application icon
+// remains consistent on all systems.
+IDI_ICON1               ICON                    "ifcopenshell_logo.ico"

src/qtviewer/resources/qt_resources.qrc

@@ -1,6 +1,5 @@
 <RCC>
     <qresource prefix="/">
-        <file>ifcopenshell_logo.png</file>
-        <file>ifcopenshell_logo.ico</file>
+        <file alias="icon">ifcopenshell_logo.png</file>
     </qresource>
 </RCC>

src/qtviewer/resources/resource.h

@@ -0,0 +1,16 @@
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by qt_res.rc
+//
+#define IDI_ICON1                       101
+
+// Next default values for new objects
+// 
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        102
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1000
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif