From 142cc00bc90de847cb1e71821826d3923bfa17de Mon Sep 17 00:00:00 2001
From: Anna Bulenkova <anna.bulenkova@jetbrains.com>
Date: Wed, 21 Jan 2015 11:20:09 +0100
Subject: [PATCH] [code] action.update() sample

---
 .../jetbrains/tutorials/actions/SimpleAction.java   | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/register_actions/src/org/jetbrains/tutorials/actions/SimpleAction.java b/register_actions/src/org/jetbrains/tutorials/actions/SimpleAction.java
index 023ba06ec..a59cc6ea5 100644
--- a/register_actions/src/org/jetbrains/tutorials/actions/SimpleAction.java
+++ b/register_actions/src/org/jetbrains/tutorials/actions/SimpleAction.java
@@ -1,7 +1,7 @@
 package org.jetbrains.tutorials.actions;
 
-import com.intellij.openapi.actionSystem.AnAction;
-import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.*;
+import com.intellij.openapi.project.Project;
 
 /**
  * @author Anna Bulenkova
@@ -11,4 +11,13 @@ public class SimpleAction extends AnAction {
     public void actionPerformed(AnActionEvent anActionEvent) {
 
     }
+
+    @Override
+    public void update(AnActionEvent anActionEvent) {
+        final Project project = anActionEvent.getData(CommonDataKeys.PROJECT);
+        if (project != null)
+            return;
+        Object navigatable = anActionEvent.getData(CommonDataKeys.NAVIGATABLE);
+        anActionEvent.getPresentation().setVisible(navigatable != null);
+    }
 }