Show marker lines/sections in the animation bezier editor

editor/animation/animation_bezier_editor.cpp

@@ -321,6 +321,60 @@ void AnimationBezierTrackEdit::_notification(int p_what) {
 			subtracks.clear();
 			subtrack_icons.clear();
 
+			// Marker sections.
+			{
+				float scale = timeline->get_zoom_scale();
+				int limit_end = get_size().width - timeline->get_buttons_width();
+
+				PackedStringArray section = editor->get_selected_section();
+				if (section.size() == 2) {
+					StringName start_marker = section[0];
+					StringName end_marker = section[1];
+					double start_time = animation->get_marker_time(start_marker);
+					double end_time = animation->get_marker_time(end_marker);
+
+					// When AnimationPlayer is playing, don't move the preview rect, so it still indicates the playback section.
+					AnimationPlayer *player = AnimationPlayerEditor::get_singleton()->get_player();
+					if (editor->is_marker_moving_selection() && !(player && player->is_playing())) {
+						start_time += editor->get_marker_moving_selection_offset();
+						end_time += editor->get_marker_moving_selection_offset();
+					}
+
+					if (start_time < animation->get_length() && end_time >= 0) {
+						float start_ofs = MAX(0, start_time) - timeline->get_value();
+						float end_ofs = MIN(animation->get_length(), end_time) - timeline->get_value();
+						start_ofs = start_ofs * scale + limit;
+						end_ofs = end_ofs * scale + limit;
+						start_ofs = MAX(start_ofs, limit);
+						end_ofs = MIN(end_ofs, limit_end);
+						Rect2 rect;
+						rect.set_position(Vector2(start_ofs, 0));
+						rect.set_size(Vector2(end_ofs - start_ofs, get_size().height));
+
+						draw_rect(rect, Color(1, 0.1, 0.1, 0.2));
+					}
+				}
+			}
+
+			// Marker overlays.
+			{
+				float scale = timeline->get_zoom_scale();
+				PackedStringArray markers = animation->get_marker_names();
+				for (const StringName marker : markers) {
+					double time = animation->get_marker_time(marker);
+					if (editor->is_marker_selected(marker) && editor->is_marker_moving_selection()) {
+						time += editor->get_marker_moving_selection_offset();
+					}
+					if (time >= 0) {
+						float offset = time - timeline->get_value();
+						offset = offset * scale + limit;
+						Color marker_color = animation->get_marker_color(marker);
+						marker_color.a = 0.2;
+						draw_line(Point2(offset, 0), Point2(offset, get_size().height), marker_color, Math::round(EDSCALE));
+					}
+				}
+			}
+
 			RBMap<String, Vector<int>> track_indices;
 			int track_count = animation->get_track_count();
 			for (int i = 0; i < track_count; ++i) {

editor/animation/animation_track_editor.cpp

@@ -7778,6 +7778,14 @@ AnimationTrackEditor::AnimationTrackEditor() {
 	box_selection_container->set_clip_contents(true);
 	timeline_vbox->add_child(box_selection_container);
 
+	bezier_edit = memnew(AnimationBezierTrackEdit);
+	timeline_vbox->add_child(bezier_edit);
+	bezier_edit->set_editor(this);
+	bezier_edit->set_timeline(timeline);
+	bezier_edit->hide();
+	bezier_edit->set_v_size_flags(SIZE_EXPAND_FILL);
+	bezier_edit->connect("timeline_changed", callable_mp(this, &AnimationTrackEditor::_timeline_changed));
+
 	marker_edit = memnew(AnimationMarkerEdit);
 	timeline->get_child(0)->add_child(marker_edit);
 	marker_edit->set_editor(this);
@@ -7786,6 +7794,7 @@ AnimationTrackEditor::AnimationTrackEditor() {
 	marker_edit->set_anchors_and_offsets_preset(Control::LayoutPreset::PRESET_FULL_RECT);
 	marker_edit->connect(SceneStringName(draw), callable_mp(this, &AnimationTrackEditor::_redraw_groups));
 	marker_edit->connect(SceneStringName(draw), callable_mp(this, &AnimationTrackEditor::_redraw_tracks));
+	marker_edit->connect(SceneStringName(draw), callable_mp((CanvasItem *)bezier_edit, &CanvasItem::queue_redraw));
 
 	scroll = memnew(ScrollContainer);
 	box_selection_container->add_child(scroll);
@@ -7801,14 +7810,6 @@ AnimationTrackEditor::AnimationTrackEditor() {
 	scroll->get_v_scroll_bar()->connect(SceneStringName(value_changed), callable_mp(this, &AnimationTrackEditor::_v_scroll_changed));
 	scroll->get_h_scroll_bar()->connect(SceneStringName(value_changed), callable_mp(this, &AnimationTrackEditor::_h_scroll_changed));
 
-	bezier_edit = memnew(AnimationBezierTrackEdit);
-	timeline_vbox->add_child(bezier_edit);
-	bezier_edit->set_editor(this);
-	bezier_edit->set_timeline(timeline);
-	bezier_edit->hide();
-	bezier_edit->set_v_size_flags(SIZE_EXPAND_FILL);
-	bezier_edit->connect("timeline_changed", callable_mp(this, &AnimationTrackEditor::_timeline_changed));
-
 	timeline_vbox->set_custom_minimum_size(Size2(0, 150) * EDSCALE);
 
 	hscroll = memnew(HScrollBar);