angular-openlayers

I am using angular-openlayers-directive , I want to get coordinates of the point where I double click. A similar question: Convert point to lat lon But I want to use it in angularjs. You should check this example out: http://tombatossals.github.io/angular-openlayers-directive/examples/080-events-propagation-example.html . It shows how you can find the lat-long coordinates for mouseover. Also, here is a fiddle I made showing how you can extend it for double click: http://jsfiddle.net/anushamc/6q2az5xz/ . Briefly, you need to listen for the events on the map by including it in the defaults like:

I want to download the map offline for a selected part of the map with single Zoom level with Openlayer OSM layer. I have got the four corner of map i.e display section of a map. But need to get the all tiles image or tiles between that four corners. I have reviewed some example: Openlayers get the image url of the tile under the mouse https://gis.stackexchange.com/questions/167792/how-to-retrieve-the-tile-url-in-openlayers-3 But I need to download the tiles on customer button click. Can anyone please help me. Here's a simple example to save tiles as data urls for later use. If you need saved