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Prevent signal disconnection attempts on invalid references

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This commit is contained in:
Yuri Sizov 2021-01-13 03:49:49 +03:00
parent 1218441b16
commit 5e8e9fc601
1 changed files with 16 additions and 3 deletions
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15
scene/gui/graph_edit.cpp
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@ -401,7 +401,14 @@ void GraphEdit::add_child_notify(Node *p_child) {
void GraphEdit::remove_child_notify(Node *p_child) {
Control::remove_child_notify(p_child);
if (is_inside_tree()) {
if (p_child == top_layer) {
top_layer = nullptr;
minimap = nullptr;
} else if (p_child == connections_layer) {
connections_layer = nullptr;
}
if (top_layer != nullptr && is_inside_tree()) {
top_layer->call_deferred("raise"); // Top layer always on top!
}
@ -409,10 +416,16 @@ void GraphEdit::remove_child_notify(Node *p_child) {
if (gn) {
gn->disconnect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_node_moved));
gn->disconnect("raise_request", callable_mp(this, &GraphEdit::_graph_node_raised));
// In case of the whole GraphEdit being destroyed these references can already be freed.
if (connections_layer != nullptr && connections_layer->is_inside_tree()) {
gn->disconnect("item_rect_changed", callable_mp((CanvasItem *)connections_layer, &CanvasItem::update));
}
if (minimap != nullptr && minimap->is_inside_tree()) {
gn->disconnect("item_rect_changed", callable_mp((CanvasItem *)minimap, &GraphEditMinimap::update));
}
}
}
void GraphEdit::_notification(int p_what) {
if (p_what == NOTIFICATION_ENTER_TREE || p_what == NOTIFICATION_THEME_CHANGED) {