From 2775c8fcb1bedf63d93cc9342fb2bc8b7d2ed70e Mon Sep 17 00:00:00 2001
From: Boris Sekachev <boris.sekachev@yandex.ru>
Date: Mon, 30 Mar 2020 16:04:51 +0300
Subject: [PATCH] Fixed zOrder range computing in case when there are tags

---
 cvat-ui/src/actions/annotation-actions.ts | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/cvat-ui/src/actions/annotation-actions.ts b/cvat-ui/src/actions/annotation-actions.ts
index 0d32cc8d9246..46989db34630 100644
--- a/cvat-ui/src/actions/annotation-actions.ts
+++ b/cvat-ui/src/actions/annotation-actions.ts
@@ -80,13 +80,10 @@ function receiveAnnotationsParameters(): AnnotationsParameters {
 }
 
 export function computeZRange(states: any[]): number[] {
-    let minZ = states.length ? states[0].zOrder : 0;
-    let maxZ = states.length ? states[0].zOrder : 0;
-    states.forEach((state: any): void => {
-        if (state.objectType === ObjectType.TAG) {
-            return;
-        }
-
+    const filteredStates = states.filter((state: any): any => state.objectType !== ObjectType.TAG);
+    let minZ = filteredStates.length ? filteredStates[0].zOrder : 0;
+    let maxZ = filteredStates.length ? filteredStates[0].zOrder : 0;
+    filteredStates.forEach((state: any): void => {
         minZ = Math.min(minZ, state.zOrder);
         maxZ = Math.max(maxZ, state.zOrder);
     });