From 7d20d78847b24586b3f25beb23b41d015a25fb0a Mon Sep 17 00:00:00 2001
From: reduz <reduzio@gmail.com>
Date: Sat, 17 Jul 2021 13:35:28 -0300
Subject: Fix duplicate selection in SceneTree

* It seems both cell_selected and multi_selected were being triggered,
* This caused inspector updating twice.
* cell_selected connection and callback were removed.

This may be a bug in Godot 3.x too, recommend checking.
---
 editor/scene_tree_editor.cpp | 31 +++++++++----------------------
 editor/scene_tree_editor.h   |  3 ++-
 2 files changed, 11 insertions(+), 23 deletions(-)

diff --git a/editor/scene_tree_editor.cpp b/editor/scene_tree_editor.cpp
index 5958a09169..ad9ad3757c 100644
--- a/editor/scene_tree_editor.cpp
+++ b/editor/scene_tree_editor.cpp
@@ -521,7 +521,7 @@ void SceneTreeEditor::_node_removed(Node *p_node) {
 
 	if (p_node == selected) {
 		selected = nullptr;
-		emit_signal("node_selected");
+		_emit_node_selected();
 	}
 }
 
@@ -615,24 +615,6 @@ void SceneTreeEditor::_tree_changed() {
 	pending_test_update = true;
 }
 
-void SceneTreeEditor::_selected_changed() {
-	TreeItem *s = tree->get_selected();
-	ERR_FAIL_COND(!s);
-	NodePath np = s->get_metadata(0);
-
-	Node *n = get_node(np);
-
-	if (n == selected) {
-		return;
-	}
-
-	selected = get_node(np);
-
-	blocked++;
-	emit_signal("node_selected");
-	blocked--;
-}
-
 void SceneTreeEditor::_deselect_items() {
 	// Clear currently selected items in scene tree dock.
 	if (editor_selection) {
@@ -641,6 +623,12 @@ void SceneTreeEditor::_deselect_items() {
 	}
 }
 
+void SceneTreeEditor::_emit_node_selected() {
+	blocked++;
+	emit_signal("node_selected");
+	blocked--;
+}
+
 void SceneTreeEditor::_cell_multi_selected(Object *p_object, int p_cell, bool p_selected) {
 	TreeItem *item = Object::cast_to<TreeItem>(p_object);
 	ERR_FAIL_COND(!item);
@@ -667,7 +655,7 @@ void SceneTreeEditor::_cell_multi_selected(Object *p_object, int p_cell, bool p_
 	// Selection changed to be single node, so emit "selected" (for single node) rather than "changed" (for multiple nodes)
 	if (editor_selection->get_selected_nodes().size() == 1) {
 		selected = editor_selection->get_selected_node_list()[0];
-		emit_signal("node_selected");
+		_emit_node_selected();
 	} else {
 		emit_signal("node_changed");
 	}
@@ -759,7 +747,7 @@ void SceneTreeEditor::set_selected(Node *p_node, bool p_emit_selected) {
 	}
 
 	if (p_emit_selected) {
-		emit_signal("node_selected");
+		_emit_node_selected();
 	}
 }
 
@@ -1200,7 +1188,6 @@ SceneTreeEditor::SceneTreeEditor(bool p_label, bool p_can_rename, bool p_can_ope
 		tree->connect("empty_tree_rmb_selected", callable_mp(this, &SceneTreeEditor::_rmb_select));
 	}
 
-	tree->connect("cell_selected", callable_mp(this, &SceneTreeEditor::_selected_changed));
 	tree->connect("item_edited", callable_mp(this, &SceneTreeEditor::_renamed), varray(), CONNECT_DEFERRED);
 	tree->connect("multi_selected", callable_mp(this, &SceneTreeEditor::_cell_multi_selected));
 	tree->connect("button_pressed", callable_mp(this, &SceneTreeEditor::_cell_button_pressed));
diff --git a/editor/scene_tree_editor.h b/editor/scene_tree_editor.h
index acd49e8d92..e833bf93e0 100644
--- a/editor/scene_tree_editor.h
+++ b/editor/scene_tree_editor.h
@@ -81,7 +81,6 @@ class SceneTreeEditor : public Control {
 
 	TreeItem *_find(TreeItem *p_node, const NodePath &p_path);
 	void _notification(int p_what);
-	void _selected_changed();
 	void _deselect_items();
 	void _rename_node(ObjectID p_node, const String &p_name);
 
@@ -133,6 +132,8 @@ class SceneTreeEditor : public Control {
 
 	Vector<StringName> valid_types;
 
+	void _emit_node_selected();
+
 public:
 	void set_filter(const String &p_filter);
 	String get_filter() const;
-- 
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