2 files changed, 31 insertions, 1 deletions
diff --git a/web/app/view/State.js b/web/app/view/State.js
index 82149713..d161251c 100644
--- a/web/app/view/State.js
+++ b/web/app/view/State.js
@@ -35,6 +35,16 @@ Ext.define('Traccar.view.State', {
             xtype: 'tbtext',
             html: Strings.stateTitle,
             baseCls: 'x-panel-header-title-default'
+        }, {
+            xtype: 'tbfill'
+        }, {
+            xtype: 'button',
+            disabled: true,
+            handler: 'onComputedAttributesClick',
+            reference: 'computedAttributesButton',
+            glyph: 'xf0ae@FontAwesome',
+            tooltip: Strings.sharedComputedAttributes,
+            tooltipType: 'title'
         }]
     },
 
diff --git a/web/app/view/StateController.js b/web/app/view/StateController.js
index 3bf76717..c6c1507d 100644
--- a/web/app/view/StateController.js
+++ b/web/app/view/StateController.js
@@ -22,7 +22,9 @@ Ext.define('Traccar.view.StateController', {
     requires: [
         'Traccar.AttributeFormatter',
         'Traccar.model.Attribute',
-        'Traccar.model.Position'
+        'Traccar.model.Position',
+        'Traccar.view.BaseWindow',
+        'Traccar.view.edit.ComputedAttributes'
     ],
 
     config: {
@@ -46,6 +48,24 @@ Ext.define('Traccar.view.StateController', {
         }
     },
 
+
+    init: function () {
+        if (Traccar.app.getUser().get('admin') ||
+                !Traccar.app.getUser().get('deviceReadonly') && !Traccar.app.getPreference('readonly', false)) {
+            this.lookupReference('computedAttributesButton').setDisabled(
+                Traccar.app.getBooleanAttributePreference('ui.disableComputedAttributes'));
+        }
+    },
+
+    onComputedAttributesClick: function () {
+        Ext.create('Traccar.view.BaseWindow', {
+            title: Strings.sharedComputedAttributes,
+            items: {
+                xtype: 'computedAttributesView'
+            }
+        }).show();
+    },
+
     keys: (function () {
         var i, list, result;
         result = {};