Fixed Windows class name (xclass) setup and caching mechanism. This was

not yet completely converted to UTF-8. Cleaned up related code, removed
old comments.
Tested and confirmed that the xclass() setup works and that different
icons can be set for different window classes (as it was in FLTK 1.1.10).


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7704 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/Fl_win32.cxx

@@ -1400,14 +1400,16 @@ Fl_X* Fl_X::make(Fl_Window* w) {
     first_class_name = class_name;
   }
 
-  const wchar_t* class_namew = L"FLTK";
-  const wchar_t* message_namew = L"FLTK::ThreadWakeup";
+  wchar_t class_namew[100]; // (limited) buffer for Windows class name
+
+  // convert UTF-8 class_name to wchar_t for RegisterClassExW and CreateWindowExW
+
+  fl_utf8toUtf16(class_name,strlen(class_name),		// in
+		 (unsigned short*)class_namew,		// out
+		 sizeof(class_namew)/sizeof(wchar_t));	// max. size
+
   if (!class_name_list.has_name(class_name)) {
-    WNDCLASSEX wc;
     WNDCLASSEXW wcw;
-
-    memset(&wc, 0, sizeof(wc));
-    wc.cbSize = sizeof(WNDCLASSEX);
     memset(&wcw, 0, sizeof(wcw));
     wcw.cbSize = sizeof(WNDCLASSEXW);
 
@@ -1428,13 +1430,11 @@ Fl_X* Fl_X::make(Fl_Window* w) {
     wcw.hbrBackground = NULL;
     wcw.lpszMenuName = NULL;
     wcw.lpszClassName = class_namew;
-    wcw.cbSize = sizeof(WNDCLASSEXW);
     RegisterClassExW(&wcw);
-    class_name_list.add_name((const char *)class_namew);
+    class_name_list.add_name(class_name);
   }
 
-  // const char* message_name = "FLTK::ThreadWakeup";
-  // if (!fl_wake_msg) fl_wake_msg = RegisterWindowMessage(message_name);
+  const wchar_t* message_namew = L"FLTK::ThreadWakeup";
   if (!fl_wake_msg) fl_wake_msg = RegisterWindowMessageW(message_namew);
 
   HWND parent;