- added code for Linux mouse check

svn path=/trunk/boinc/; revision=19290

checkin_notes

@@ -8560,3 +8560,9 @@ David  12 Oct 2009
 
     client/
         gui_rpc_server_ops.cpp
+
+David  12 Oct 2009
+    - added code for Linux mouse check
+
+    lib/
+        x_util.cpp

lib/x_util.cpp

@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <X11/Intrinsic.h>
+#include <X11/StringDefs.h>
+#include <X11/Xutil.h>
+#include <X11/Shell.h>
+
+Display *d;
+
+// listen for mouse motion in all windows under the given one
+//
+void listen_for_mouse(Display* display, Window window) {
+    Window parent, *children;
+    unsigned int nchildren;
+    int retval;
+
+    retval = XQueryTree(d, window, &window, &parent, &children, &nchildren);
+    if (retval == FALSE) {
+        fprintf(stderr, "XQueryTree() failed: %d\n", retval);
+        return;
+    }
+
+    if (nchildren == 0) return;
+    XSelectInput(display, window, PointerMotionMask);
+    for (int i=0; i<nchildren; i++) {
+        XSelectInput(d, children[i], PointerMotionMask);
+        listen_for_mouse(display, children[i]);
+    }
+    XFree((char *)children);
+}
+
+// test program for the above.
+//
+#if 1
+int main(int argc, char **argv) {
+    XEvent event;
+    int count = 0;
+    Display* display;
+
+    const char* hostname = argv[1]?argv[1]:":0";
+    display = XOpenDisplay(hostname);
+    if (!display) {
+        fprintf(stderr, "XOpenDisplay(%s) failed\n", hostname);
+        exit(1);
+    }
+    fprintf(stderr, "Sleeping for 10 sec\n");
+    sleep(10);
+    fprintf(stderr, "Checking for mouse movement\n");
+    listen_for_mouse(display, DefaultRootWindow(display));
+    XNextEvent(d, &event);
+    if (event.type == MotionNotify) {
+        fprintf(stderr, "mouse moved, exiting\n");
+        exit(0);
+    }
+}
+#endif