The UI Dev

    In the last post we have seen what an overlay is and we have also seen a small simple overlay example as well. Today's example is a bit complex as compared to the last one, but is not at all difficult. We will directly jump to the code instead of having any more descriptions and stuff. So, here's the code.     The output of the above code looks as seen in the result section above. You need to click on the map to place a marker on the map. You can place multiple markers on the map by clicking on the map multiple times. By clicking on the "Clear overlays" button all the markers on the map will disappear. By clicking on the "Show all overlays" button, all the cleared, but not deleted markers will reappear. Clicking on the "Delete overlays" buttons will remove all the markers permanently.     If you have any doubts or queries regarding the code please leave a comment or drop me a mail .

    "Overlays"....!!! What is this now! Never heard or used it before? You might immediately say "NO"...But, actually all of you have already seen what an overlay is and you have also used it! Now you would say "When!?!?" Well, all of the markers, polylines, polygons that you have created are overlays. Overlays are objects on the map that are tied to latitude/ longitude coordinates, so they move when you drag or zoom the map. Overlays reflect objects that you add to the map to designate points, lines, areas or collection of objects.     Till now we have seen how to create an overlay. In today's example we will see how to remove an overlay. In this example we will create markers on click. But the difference will be that when you create a new marker, the earlier one will disappear from the map. So at any given time there would only be one single marker on the map! Note that removing the marker does not delete the overlay; it simply removes the overlay...