Google Code-in

Code a map application similar to GNOME Maps using OpenStreetMap as a data source.

This is a multi-part task, there will be more tasks adding more functionalities to the application.

You must work from the application created in parts 1-4: https://github.com/raefaldhia/Maps

For this fifth part, the goal is to implement transformations on the map view to allow for smooth browsing of the map. It should work this way:

• The user can pan and zoom the map. This will trigger a reload of a map tile from the server, but it can take some time
• In order to provide immediate feedback, the existing tile should be moved and zoomed appropriately. This can be done immediately.
• Once the new tile for the new position is available, it will replace the previous one.

In order to do this, you can use BView::SetTransform and the BTransform class. This will allow you to perform all required changes (panning and scaling) by the use of an appropriate transform matrix. Rotation would also be possible.