Closes #17290: Loading cursor now does not persist when launching GUI scripts.
diff --git a/PC/launcher.c b/PC/launcher.c
index dfad44a..445e96e 100644
--- a/PC/launcher.c
+++ b/PC/launcher.c
@@ -500,6 +500,21 @@
STARTUPINFOW si;
PROCESS_INFORMATION pi;
+#if defined(_WINDOWS)
+ // When explorer launches a Windows (GUI) application, it displays
+ // the "app starting" (the "pointer + hourglass") cursor for a number
+ // of seconds, or until the app does something UI-ish (eg, creating a
+ // window, or fetching a message). As this launcher doesn't do this
+ // directly, that cursor remains even after the child process does these
+ // things. We avoid that by doing a simple post+get message.
+ // See http://bugs.python.org/issue17290 and
+ // https://bitbucket.org/vinay.sajip/pylauncher/issue/20/busy-cursor-for-a-long-time-when-running
+ MSG msg;
+
+ PostMessage(0, 0, 0, 0);
+ GetMessage(&msg, 0, 0, 0);
+#endif
+
debug(L"run_child: about to run '%s'\n", cmdline);
job = CreateJobObject(NULL, NULL);
ok = QueryInformationJobObject(job, JobObjectExtendedLimitInformation,
@@ -1362,4 +1377,4 @@
return process(argc, argv);
}
-#endif
\ No newline at end of file
+#endif