Submitted by YvesLaprie on Tue, 05/11/2010 - 14:07. General Questions
I just changed to Ubuntu 10.4 and the pointer is frozzen when a popup menu should appear.

To replicate this new problem I just used the program simple_popup.c from http://www.ist.co.uk/motif/books/vol6A/ch-19.fm.html.
After clicking the button 3 (the right one) the pointer is locked in the window without any popup menu.

Is there any solution?

/* simple_popup.c -- demonstrate how to use a simple popup menu.
** Create a main window that contains a DrawingArea widget, which
** displays a popup menu when the user presses the third mouse button.
*/

#include
#include
#include

main (int argc, char *argv[])
{
XmString line, square, circle, exit_b, exit_acc;
Widget toplevel, main_w, drawing_a, popup_menu;
void popup_cb(Widget, XtPointer, XtPointer);
XtAppContext app;
Arg args[4];
int n;

XtSetLanguageProc (NULL, NULL, NULL);
toplevel = XtVaOpenApplication (&app, "Demos", NULL, 0, &argc, argv, NULL,
sessionShellWidgetClass, NULL);

/* Create a MainWindow widget that contains a DrawingArea in
** its work window.
*/
n = 0;
XtSetArg (args[n], XmNscrollingPolicy, XmAUTOMATIC); n++;
main_w = XmCreateMainWindow (toplevel, "main_w", args, n);

/* Create a DrawingArea -- no actual drawing will be done. */
n = 0;
XtSetArg (args[n], XmNwidth, 500); n++;
XtSetArg (args[n], XmNheight, 500); n++;
drawing_a = XmCreateDrawingArea (main_w, "drawing_a", args, n);
XtManageChild (drawing_a);

line = XmStringCreateLocalized ("Line");
square = XmStringCreateLocalized ("Square");
circle = XmStringCreateLocalized ("Circle");
exit_b = XmStringCreateLocalized ("Exit");
exit_acc = XmStringCreateLocalized ("Ctrl+C");
popup_menu = XmVaCreateSimplePopupMenu (drawing_a, "popup", popup_cb,
XmNpopupEnabled, XmPOPUP_AUTOMATIC,
XmVaPUSHBUTTON, line, 'L', NULL, NULL,
XmVaPUSHBUTTON, square, 'S', NULL, NULL,
XmVaPUSHBUTTON, circle, 'C', NULL, NULL,
XmVaSEPARATOR,
XmVaPUSHBUTTON, exit_b, 'x', "Ctrlc", exit_acc,
NULL);
XmStringFree (line);
XmStringFree (square);
XmStringFree (circle);
XmStringFree (exit_b);
XmStringFree (exit_acc);

XtManageChild (main_w);
XtRealizeWidget (toplevel);
XtAppMainLoop (app);
}

/* popup_cb() -- invoked when the user selects an item in the popup menu */
void popup_cb (Widget menu_item, XtPointer client_data, XtPointer call_data)
{
int item_no = (int) client_data;

if (item_no == 3) /* Exit was selected -- exit */
exit (0);

/* Otherwise, just print the selection */
puts (XtName (menu_item));
}