Hello,
from a gtk+ application I execute an external program in Windows 7 (64
bit) with administrator privileges, and I use a callback function when it
exits to elaborate the result. So far, it works.
The problem is that I would like to hide or, at least, to minimize
(iconify) the external program to not bore the user.
I guess that I have to manage the GPid value returned
by g_spawn_async_with_pipes, but how? I didn't find any suitable function
in gtk.
Knowing that GPid is an handle in windows, I used the winapi
functions CloseWindow, ShowWindow, MoveWindow, SetWindowPos. They are
simply and silently ignored during the execution.
Just to check the returned pid, I used TerminateProcess( (HWND)pid , 0) and
the external application correctly terminated: i.e. pid is correct. On the
other side DestroyWindow is ignored.
Do you have any suggestion?
Below you can find a simplified version of my code.
#include <windows.h>
#include <gtk/gtk.h>
// ... snip ... //
gchar *argv[3];
GPid pid;
argv[0]= "external_program.exe";
argv[1]= "external_parameter_file.ini";
argv[2]= NULL;//
g_spawn_async_with_pipes (
NULL, //gchar *working_directory,
argv, //gchar **argv,
NULL, //gchar **envp,
G_SPAWN_DO_NOT_REAP_CHILD | G_SPAWN_SEARCH_PATH,
//GSpawnFlags flags,
NULL, //GSpawnChildSetupFunc child_setup,
NULL, //gpointer user_data,
&pid, //GPid *child_pid,
NULL, //gint *standard_input,
NULL, //gint *standard_output,
NULL, //gint *standard_error,
error); //GError **error);
/* Add watch function to elaborate the result
of external_program.exe. It will clean any remnants of process. */
g_child_watch_add( pid, (GChildWatchFunc)child_watch_cb, data );
CloseWindow((HWND)pid); // ignored during execution!!!
// I tried also the following variants that are "ignored":
// ShowWindow((HWND)pid, SW_FORCEMINIMIZE); // Tested also other
options: SW_HIDE, SW_MINIMIZE, SW_SHOWMINIMIZED, SW_SHOWMINNOACTIVE
// MoveWindow((HWND)pid, 10, 10, 10, 10, TRUE);
// SetWindowPos( (HWND)pid, 0, 0, 0, 0, 0, SWP_HIDEWINDOW |
SWP_NOMOVE | SWP_NOZORDER | SWP_NOSIZE );
// This works and terminates the external application, but this is
not obviously my goal
// TerminateProcess( (HWND)pid , 0);
// ... snip ... //
/Giovanni
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