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add "propagate_call" method to Node

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It is possible to propagate a notification down the Node tree by
using `propagate_notification`, but there was no such method for
doing the same but with method calls.

This commit adds the `propagate_call` method, which calls a method
on a node and all child nodes. An optional paramter `parent_first`
determines whether the parent node gets called before or after the
children have been visited. It defaults to false, so the parent
gets called last.
This commit is contained in:
Karroffel 2017-08-19 15:17:06 +02:00
parent 5d85108f94
commit 390f7def39
3 changed files with 31 additions and 0 deletions
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18
scene/main/node.cpp
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@ -1954,6 +1954,23 @@ void Node::propagate_notification(int p_notification) {
data.blocked--;
}
void Node::propagate_call(const StringName &p_method, const Array &p_args, const bool p_parent_first) {
data.blocked++;
if (p_parent_first && has_method(p_method))
callv(p_method, p_args);
for (int i = 0; i < data.children.size(); i++) {
data.children[i]->propagate_call(p_method, p_args, p_parent_first);
}
if (!p_parent_first && has_method(p_method))
callv(p_method, p_args);
data.blocked--;
}
void Node::_propagate_replace_owner(Node *p_owner, Node *p_by_owner) {
if (get_owner() == p_owner)
set_owner(p_by_owner);
@ -2761,6 +2778,7 @@ void Node::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_filename", "filename"), &Node::set_filename);
ClassDB::bind_method(D_METHOD("get_filename"), &Node::get_filename);
ClassDB::bind_method(D_METHOD("propagate_notification", "what"), &Node::propagate_notification);
ClassDB::bind_method(D_METHOD("propagate_call", "method", "args", "parent_first"), &Node::propagate_call, DEFVAL(Array()), DEFVAL(false));
ClassDB::bind_method(D_METHOD("set_fixed_process", "enable"), &Node::set_fixed_process);
ClassDB::bind_method(D_METHOD("get_fixed_process_delta_time"), &Node::get_fixed_process_delta_time);
ClassDB::bind_method(D_METHOD("is_fixed_processing"), &Node::is_fixed_processing);