[Python-checkins] cpython (3.3): Closes #17290: Loading cursor now does not persist when launching GUI scripts.

[vinay.sajip]

http://hg.python.org/cpython/rev/5fddaa709d6b
changeset:   82401:5fddaa709d6b
branch:      3.3
parent:      82399:2678fd10f689
user:        Vinay Sajip <vinay_sajip at yahoo.co.uk>
date:        Tue Feb 26 16:29:06 2013 +0000
summary:
  Closes #17290: Loading cursor now does not persist when launching GUI scripts.

files:
  PC/launcher.c |  17 ++++++++++++++++-
  1 files changed, 16 insertions(+), 1 deletions(-)


diff --git a/PC/launcher.c b/PC/launcher.c
--- 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

-- 
Repository URL: http://hg.python.org/cpython