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// $Id: grabtest.C,v 1.3 1999/08/19 11:28:37 andreas Exp $
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// Simple grab tester -- debug this with DDD and `checkGrab' enabled.
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// Copyright (C) 1998 Technische Universitaet Braunschweig, Germany.
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// Written by Andreas Zeller <zeller@gnu.org>.
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// This file is part of DDD.
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// DDD is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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// DDD is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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// You should have received a copy of the GNU General Public
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// License along with DDD -- see the file COPYING.
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// If not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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// DDD is the data display debugger.
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// For details, see the DDD World-Wide-Web page,
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// `http://www.gnu.org/software/ddd/',
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// or send a mail to the DDD developers <ddd@gnu.org>.
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#include <unistd.h> // sleep()
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#include <stdlib.h> // atoi()
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#include <sys/types.h>
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int main(int argc, char *argv[])
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Display *display = XOpenDisplay((char *)0);
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cerr << "Cannot open display\n";
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Window window = DefaultRootWindow(display);
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if (argc > 1 && atoi(argv[1]) > 0)
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seconds = atoi(argv[1]);
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cout << "Grabbing...";
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// We pass GrabModeAsync for the keyboard such that it will keep
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int grab_result = XGrabPointer(display, window,
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True, 0, GrabModeSync, GrabModeAsync,
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None, None, CurrentTime);
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// Placing a breakpoint
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// will interrupt this function while the pointer is grabbed.
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// Rely on DDD `checkGrab' to ungrab it.
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cout << "GrabSuccess\n";
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cout << "Sleeping for " << seconds << " seconds...";
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XUngrabPointer(display, CurrentTime);
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cout << "GrabNotViewable\n";
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cout << "AlreadyGrabbed\n";
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cout << "GrabFrozen\n";
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cout << "GrabInvalidTime\n";
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cout << grab_result << "\n";