Make animation editor change tracks positions instead of swapping them

doc/classes/Animation.xml

@@ -450,6 +450,17 @@
 				Move a track down.
 			</description>
 		</method>
+		<method name="track_move_to">
+			<return type="void">
+			</return>
+			<argument index="0" name="idx" type="int">
+			</argument>
+			<argument index="1" name="to_idx" type="int">
+			</argument>
+			<description>
+				Changes the index position of track [code]idx[/code] to the one defined in [code]to_idx[/code].
+			</description>
+		</method>
 		<method name="track_move_up">
 			<return type="void">
 			</return>
@@ -571,6 +582,7 @@
 			<argument index="1" name="with_idx" type="int">
 			</argument>
 			<description>
+				Swaps the track [code]idx[/code]'s index position with the track [code]with_idx[/code].
 			</description>
 		</method>
 		<method name="transform_track_insert_key">

editor/animation_track_editor.cpp

@@ -1213,7 +1213,8 @@ void AnimationTrackEdit::_notification(int p_what) {
 		if (has_focus()) {
 			Color accent = get_color("accent_color", "Editor");
 			accent.a *= 0.7;
-			draw_rect(Rect2(Point2(), get_size()), accent, false);
+			// Offside so the horizontal sides aren't cutoff.
+			draw_rect(Rect2(Point2(1, 0), get_size() - Size2(1, 0)), accent, false);
 		}
 
 		Ref<Font> font = get_font("font", "Label");
@@ -2185,6 +2186,9 @@ Variant AnimationTrackEdit::get_drag_data(const Point2 &p_point) {
 
 	Dictionary drag_data;
 	drag_data["type"] = "animation_track";
+	String base_path = animation->track_get_path(track);
+	base_path = base_path.get_slice(":", 0); // Remove sub-path.
+	drag_data["group"] = base_path;
 	drag_data["index"] = track;
 
 	ToolButton *tb = memnew(ToolButton);
@@ -2205,8 +2209,18 @@ bool AnimationTrackEdit::can_drop_data(const Point2 &p_point, const Variant &p_d
 	}
 
 	String type = d["type"];
-	if (type != "animation_track")
+	if (type != "animation_track") {
 		return false;
+	}
+
+	// Don't allow moving tracks outside their groups.
+	if (get_editor()->is_grouping_tracks()) {
+		String base_path = animation->track_get_path(track);
+		base_path = base_path.get_slice(":", 0); // Remove sub-path.
+		if (d["group"] != base_path) {
+			return false;
+		}
+	}
 
 	if (p_point.y < get_size().height / 2) {
 		dropping_at = -1;
@@ -2227,8 +2241,18 @@ void AnimationTrackEdit::drop_data(const Point2 &p_point, const Variant &p_data)
 	}
 
 	String type = d["type"];
-	if (type != "animation_track")
+	if (type != "animation_track") {
 		return;
+	}
+
+	// Don't allow moving tracks outside their groups.
+	if (get_editor()->is_grouping_tracks()) {
+		String base_path = animation->track_get_path(track);
+		base_path = base_path.get_slice(":", 0); // Remove sub-path.
+		if (d["group"] != base_path) {
+			return;
+		}
+	}
 
 	int from_track = d["index"];
 
@@ -2683,6 +2707,13 @@ void AnimationTrackEditor::_track_remove_request(int p_track) {
 	}
 }
 
+void AnimationTrackEditor::_track_grab_focus(int p_track) {
+
+	// Don't steal focus if not working with the track editor.
+	if (Object::cast_to<AnimationTrackEdit>(get_focus_owner()))
+		track_edits[p_track]->grab_focus();
+}
+
 void AnimationTrackEditor::set_anim_pos(float p_pos) {
 
 	timeline->set_play_position(p_pos);
@@ -3447,7 +3478,7 @@ void AnimationTrackEditor::_update_tracks() {
 
 		if (use_grouping) {
 			String base_path = animation->track_get_path(i);
-			base_path = base_path.get_slice(":", 0); // remove subpath
+			base_path = base_path.get_slice(":", 0); // Remove sub-path.
 
 			if (!group_sort.has(base_path)) {
 				AnimationTrackEditGroup *g = memnew(AnimationTrackEditGroup);
@@ -3664,17 +3695,18 @@ void AnimationTrackEditor::_update_length(double p_new_len) {
 }
 
 void AnimationTrackEditor::_dropped_track(int p_from_track, int p_to_track) {
-	if (p_to_track >= track_edits.size()) {
-		p_to_track = track_edits.size() - 1;
-	}
-
-	if (p_from_track == p_to_track)
+	if (p_from_track == p_to_track || p_from_track == p_to_track - 1) {
 		return;
+	}
 
 	_clear_selection();
 	undo_redo->create_action(TTR("Rearrange Tracks"));
-	undo_redo->add_do_method(animation.ptr(), "track_swap", p_from_track, p_to_track);
-	undo_redo->add_undo_method(animation.ptr(), "track_swap", p_to_track, p_from_track);
+	undo_redo->add_do_method(animation.ptr(), "track_move_to", p_from_track, p_to_track);
+	// Take into account that the position of the tracks that come after the one removed will change.
+	int to_track_real = p_to_track > p_from_track ? p_to_track - 1 : p_to_track;
+	undo_redo->add_undo_method(animation.ptr(), "track_move_to", to_track_real, p_to_track > p_from_track ? p_from_track : p_from_track + 1);
+	undo_redo->add_do_method(this, "_track_grab_focus", to_track_real);
+	undo_redo->add_undo_method(this, "_track_grab_focus", p_from_track);
 	undo_redo->commit_action();
 }
 
@@ -4876,10 +4908,20 @@ void AnimationTrackEditor::_cleanup_animation(Ref<Animation> p_animation) {
 }
 
 void AnimationTrackEditor::_view_group_toggle() {
+
 	_update_tracks();
 	view_group->set_icon(get_icon(view_group->is_pressed() ? "AnimationTrackList" : "AnimationTrackGroup", "EditorIcons"));
 }
 
+bool AnimationTrackEditor::is_grouping_tracks() {
+
+	if (!view_group) {
+		return false;
+	}
+
+	return !view_group->is_pressed();
+}
+
 void AnimationTrackEditor::_selection_changed() {
 
 	if (selected_filter->is_pressed()) {
@@ -4926,6 +4968,7 @@ void AnimationTrackEditor::_bind_methods() {
 	ClassDB::bind_method("_animation_update", &AnimationTrackEditor::_animation_update);
 	ClassDB::bind_method("_timeline_changed", &AnimationTrackEditor::_timeline_changed);
 	ClassDB::bind_method("_track_remove_request", &AnimationTrackEditor::_track_remove_request);
+	ClassDB::bind_method("_track_grab_focus", &AnimationTrackEditor::_track_grab_focus);
 	ClassDB::bind_method("_name_limit_changed", &AnimationTrackEditor::_name_limit_changed);
 	ClassDB::bind_method("_update_scroll", &AnimationTrackEditor::_update_scroll);
 	ClassDB::bind_method("_update_tracks", &AnimationTrackEditor::_update_tracks);
@@ -5024,7 +5067,6 @@ AnimationTrackEditor::AnimationTrackEditor() {
 	scroll->set_enable_v_scroll(true);
 	track_vbox->add_constant_override("separation", 0);
 
-	//timeline_vbox->add_child(memnew(HSeparator));
 	HBoxContainer *bottom_hb = memnew(HBoxContainer);
 	add_child(bottom_hb);
 

editor/animation_track_editor.h

@@ -325,6 +325,7 @@ class AnimationTrackEditor : public VBoxContainer {
 	void _name_limit_changed();
 	void _timeline_changed(float p_new_pos, bool p_drag);
 	void _track_remove_request(int p_track);
+	void _track_grab_focus(int p_track);
 
 	UndoRedo *undo_redo;
 
@@ -513,6 +514,7 @@ public:
 	float get_moving_selection_offset() const;
 	bool is_snap_enabled();
 	float snap_time(float p_value);
+	bool is_grouping_tracks();
 
 	MenuButton *get_edit_menu();
 	AnimationTrackEditor();

scene/resources/animation.cpp

@@ -2559,17 +2559,6 @@ bool Animation::has_loop() const {
 	return loop;
 }
 
-void Animation::track_move_up(int p_track) {
-
-	if (p_track >= 0 && p_track < (tracks.size() - 1)) {
-
-		SWAP(tracks.write[p_track], tracks.write[p_track + 1]);
-	}
-
-	emit_changed();
-	emit_signal(SceneStringNames::get_singleton()->tracks_changed);
-}
-
 void Animation::track_set_imported(int p_track, bool p_imported) {
 
 	ERR_FAIL_INDEX(p_track, tracks.size());
@@ -2595,12 +2584,40 @@ bool Animation::track_is_enabled(int p_track) const {
 	return tracks[p_track]->enabled;
 }
 
+void Animation::track_move_up(int p_track) {
+
+	if (p_track >= 0 && p_track < (tracks.size() - 1)) {
+
+		SWAP(tracks.write[p_track], tracks.write[p_track + 1]);
+	}
+
+	emit_changed();
+	emit_signal(SceneStringNames::get_singleton()->tracks_changed);
+}
+
 void Animation::track_move_down(int p_track) {
 
 	if (p_track > 0 && p_track < tracks.size()) {
 
 		SWAP(tracks.write[p_track], tracks.write[p_track - 1]);
 	}
+
+	emit_changed();
+	emit_signal(SceneStringNames::get_singleton()->tracks_changed);
+}
+
+void Animation::track_move_to(int p_track, int p_to_index) {
+
+	ERR_FAIL_INDEX(p_track, tracks.size());
+	ERR_FAIL_INDEX(p_to_index, tracks.size() + 1);
+	if (p_track == p_to_index || p_track == p_to_index - 1)
+		return;
+
+	Track *track = tracks.get(p_track);
+	tracks.remove(p_track);
+	// Take into account that the position of the tracks that come after the one removed will change.
+	tracks.insert(p_to_index > p_track ? p_to_index - 1 : p_to_index, track);
+
 	emit_changed();
 	emit_signal(SceneStringNames::get_singleton()->tracks_changed);
 }
@@ -2612,6 +2629,7 @@ void Animation::track_swap(int p_track, int p_with_track) {
 	if (p_track == p_with_track)
 		return;
 	SWAP(tracks.write[p_track], tracks.write[p_with_track]);
+
 	emit_changed();
 	emit_signal(SceneStringNames::get_singleton()->tracks_changed);
 }
@@ -2656,6 +2674,7 @@ void Animation::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("track_move_up", "idx"), &Animation::track_move_up);
 	ClassDB::bind_method(D_METHOD("track_move_down", "idx"), &Animation::track_move_down);
+	ClassDB::bind_method(D_METHOD("track_move_to", "idx", "to_idx"), &Animation::track_move_to);
 	ClassDB::bind_method(D_METHOD("track_swap", "idx", "with_idx"), &Animation::track_swap);
 
 	ClassDB::bind_method(D_METHOD("track_set_imported", "idx", "imported"), &Animation::track_set_imported);

scene/resources/animation.h

@@ -293,6 +293,7 @@ public:
 
 	void track_move_up(int p_track);
 	void track_move_down(int p_track);
+	void track_move_to(int p_track, int p_to_index);
 	void track_swap(int p_track, int p_with_track);
 
 	void track_set_imported(int p_track, bool p_imported);