fix select all checkbox

diff --git a/filex/static/filex/filex.js b/filex/static/filex/filex.js
index 10dc6bc..5132ec7 100644 (file)
--- a/filex/static/filex/filex.js
+++ b/filex/static/filex/filex.js
@@ -387,7 +387,14 @@ $(function(){
         },
 
         updateSelectAll: function() {
-            this.$selectAll.prop('checked', this.selectedFiles().length == this.visibleFiles().length);
+            if (this.visibleFiles().length) {
+                this.$selectAll.prop('disabled', false);
+                this.$selectAll.prop('checked', this.selectedFiles().length == this.visibleFiles().length);
+            }
+            else {
+                this.$selectAll.prop('disabled', true);
+                this.$selectAll.prop('checked', false);
+            }
         },
 
         clearSelection: function() {