# HG changeset patch
# User Alain Mazy <am@osimis.io>
# Date 1680173764 -7200
# Node ID b2738d7a388d5a3153c0d8288e8de06a92e0d569
# Parent  f36de3ba43c8684262a1e7e7f52818819ca64625
Prevent dragging series before they are ready

diff -r f36de3ba43c8 -r b2738d7a388d Applications/StoneWebViewer/NEWS
--- a/Applications/StoneWebViewer/NEWS	Fri Dec 23 17:30:12 2022 +0100
+++ b/Applications/StoneWebViewer/NEWS	Thu Mar 30 12:56:04 2023 +0200
@@ -3,6 +3,11 @@
 
 * New button "Stretch to whole range" in the "Change windowing" menu
 
+Maintenance
+-----------
+
+* Prevent dragging series before they are ready
+
 
 Version 2.5 (2022-12-05)
 ========================
diff -r f36de3ba43c8 -r b2738d7a388d Applications/StoneWebViewer/WebApplication/app.js
--- a/Applications/StoneWebViewer/WebApplication/app.js	Fri Dec 23 17:30:12 2022 +0100
+++ b/Applications/StoneWebViewer/WebApplication/app.js	Thu Mar 30 12:56:04 2023 +0200
@@ -805,13 +805,17 @@
     },
     
     SeriesDragStart: function(event, seriesIndex) {
-      // It is necessary to use ".toString()" for Microsoft Edge Legacy (*)
-      event.dataTransfer.setData('seriesIndex', seriesIndex.toString());
+      if (this.series[seriesIndex].numberOfFrames > 0) { // prevent dragging before the series metadata have been loaded
+        // It is necessary to use ".toString()" for Microsoft Edge Legacy (*)
+        event.dataTransfer.setData('seriesIndex', seriesIndex.toString());
+      }
     },
 
     VirtualSeriesDragStart: function(event, seriesIndex, virtualSeriesId) {
-      event.dataTransfer.setData('seriesIndex', seriesIndex.toString());
-      event.dataTransfer.setData('virtualSeriesId', virtualSeriesId.toString());
+      if (this.series[seriesIndex].numberOfFrames > 0) { // prevent dragging before the series metadata have been loaded
+        event.dataTransfer.setData('seriesIndex', seriesIndex.toString());
+        event.dataTransfer.setData('virtualSeriesId', virtualSeriesId.toString());
+      }
     },
 
     SetViewportSeriesInstanceUid: function(viewportIndex, seriesInstanceUid) {