From 55585e03cbaa8243915381f87e7ba37e99ca374b Mon Sep 17 00:00:00 2001
From: Timon Engelke <timon.engelke@online.de>
Date: Sun, 6 Dec 2020 19:42:56 +0100
Subject: [PATCH] verification view: wait for image before drawing annotations

---
 .../annotations/static/annotations/js/verification.js      | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/imagetagger/imagetagger/annotations/static/annotations/js/verification.js b/imagetagger/imagetagger/annotations/static/annotations/js/verification.js
index fdd7e61f..1cecc324 100644
--- a/imagetagger/imagetagger/annotations/static/annotations/js/verification.js
+++ b/imagetagger/imagetagger/annotations/static/annotations/js/verification.js
@@ -413,6 +413,13 @@ function calculateImageScale() {
     if (tool) {
       tool.clear();
     }
+    // wait for image
+    let image = $('#image')[0];
+    if (!(image.complete && image.naturalHeight !== 0)) {
+      window.setTimeout(() => drawAnnotations(annotations, current), 50);
+      return;
+    }
+    // image is loaded
     let annotation = annotations[0];
     if (!tool || tool.annotationTypeId !== annotation.annotation_type.id ||
       (tool.vector_type === 5 && tool.node_count !== annotation.annotation_type.node_count)) {