Display Google Map after entering address?
I think you are looking for geofield gmap module, it have the option same like your requirement. See the below screenshot and also easy to configure.

Geofield Gmap allow to use a google map v3 map to input a location.

A quick text input + geocode allow you to specify an address.

You can also drag and drop the marker to narrow the position.



Geofield Gmap require geofield.

Geofield is a module for storing geographic data in Drupal 7. It supports all geo-types (points, lines, polygons, multitypes etc.)