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Check if running under X11 on launch #8

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Check if running under X11 on launch #8

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19 changes: 19 additions & 0 deletions src/lxrandr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <gdk/gdkx.h>

#include <locale.h>
#include <stdio.h>
Expand Down Expand Up @@ -772,6 +773,24 @@ int main(int argc, char** argv)

gtk_init( &argc, &argv );

#if GTK_CHECK_VERSION(3, 0, 0)
/* check if not running under X11 */
if (!GDK_IS_X11_DISPLAY(gdk_display_get_default()))
{
GtkWidget *dialog = gtk_message_dialog_new(
NULL,
GTK_DIALOG_MODAL,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_OK,
_("This tool can be used only under X11.")
);

gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
return 1;
}
#endif

if( ! get_xrandr_info() )
{
dlg = gtk_message_dialog_new( NULL,
Expand Down