Time for Action – using the NavigationHistory control

Let's use the NavigationHistory control's nextTrigger and previousTrigger methods to go through our navigation history.

1. Open up the previous examples and enable Firebug. We're going to create a NavigationHistory control object and add it to the map via the console. Enter and run the following code:

   var nav_history_control = new OpenLayers.Control.NavigationHistory();
   map.addControl(nav_history_control);

2. Pan and zoom around the map. Each time you update the map, the NavigationHistory control stores information about your actions. Then, in Firebug, issue the following command:

   nav_history_control.previousTrigger();

3. You should see the map return to the previous zoom level and coordinate. Now, let's return to where we were by calling:

   nav_history_control.nextTrigger();
   

What Just Happened?

We just created and added a NavigationHistory control to the map, then called previousTrigger() and nextTigger() methods.

OpenLayers.Control.NavToolbar

OpenLayer...