+ *value = PyString_AsString(val);
+ return true;
+}
+
+
+bool python_register(int action, PyObject *callback)
+{
+ if (action < 0 || action >= OBActions::NUM_ACTIONS ||
+ action == OBActions::Action_KeyPress) {
+ PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
+ return false;
+ }
+ if (!PyCallable_Check(callback)) {
+ PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
+ return false;
+ }
+
+ FunctionList::iterator it = std::find(callbacks[action].begin(),
+ callbacks[action].end(),
+ callback);
+ if (it == callbacks[action].end()) { // not already in there
+ Py_XINCREF(callback); // Add a reference to new callback
+ callbacks[action].push_back(callback);
+ }
+ return true;
+}
+
+bool python_preregister(int action, PyObject *callback)
+{
+ if (action < 0 || action >= OBActions::NUM_ACTIONS ||
+ action == OBActions::Action_KeyPress) {
+ PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
+ return false;
+ }
+ if (!PyCallable_Check(callback)) {
+ PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
+ return false;
+ }
+
+ FunctionList::iterator it = std::find(callbacks[action].begin(),
+ callbacks[action].end(),
+ callback);
+ if (it == callbacks[action].end()) { // not already in there
+ Py_XINCREF(callback); // Add a reference to new callback
+ callbacks[action].insert(callbacks[action].begin(), callback);
+ }
+ return true;
+}
+
+bool python_unregister(int action, PyObject *callback)
+{
+ if (action < 0 || action >= OBActions::NUM_ACTIONS ||
+ action == OBActions::Action_KeyPress) {
+ PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
+ return false;
+ }
+ if (!PyCallable_Check(callback)) {
+ PyErr_SetString(PyExc_AssertionError, "Invalid callback function.");
+ return false;
+ }
+
+ FunctionList::iterator it = std::find(callbacks[action].begin(),
+ callbacks[action].end(),
+ callback);
+ if (it != callbacks[action].end()) { // its been registered before
+ Py_XDECREF(*it); // Dispose of previous callback
+ callbacks[action].erase(it);
+ }
+ return true;
+}
+
+bool python_unregister_all(int action)
+{
+ if (action < 0 || action >= OBActions::NUM_ACTIONS) {
+ PyErr_SetString(PyExc_AssertionError, "Invalid action type.");
+ return false;
+ }
+
+ while (!callbacks[action].empty()) {
+ Py_XDECREF(callbacks[action].back());
+ callbacks[action].pop_back();
+ }
+ return true;
+}
+
+void python_callback(OBActions::ActionType action, Window window,
+ OBWidget::WidgetType type, unsigned int state,
+ long d1, long d2, long d3, long d4)
+{
+ PyObject *arglist;
+ PyObject *result;
+
+ assert(action >= 0 && action < OBActions::NUM_ACTIONS);
+
+ if (d4 != LONG_MIN)
+ arglist = Py_BuildValue("iliillll", action, window, type, state,
+ d1, d2, d3, d4);
+ else if (d3 != LONG_MIN)
+ arglist = Py_BuildValue("iliilll", action, window, type, state,
+ d1, d2, d3);
+ else if (d2 != LONG_MIN)
+ arglist = Py_BuildValue("iliill", action, window, type, state, d1, d2);
+ else if (d1 != LONG_MIN)
+ arglist = Py_BuildValue("iliil", action, window, type, state, d1);
+ else
+ arglist = Py_BuildValue("ilii", action, window, type, state);
+
+ FunctionList::iterator it, end = callbacks[action].end();
+ for (it = callbacks[action].begin(); it != end; ++it) {
+ // call the callback
+ result = PyEval_CallObject(*it, arglist);
+ if (result) {
+ Py_DECREF(result);
+ } else {
+ // an exception occured in the script, display it
+ PyErr_Print();
+ }
+ }
+
+ Py_DECREF(arglist);
+}