Enhance drag and drop functionality on an existing app

Need Bezier curve to be introduced on a screen in our app. [login to view URL] has the screenshot of our app on play store called "Bisoft"(by [login to view URL], [login to view URL]) A bangalore based company looking for android dev who can implement below Features needed:- [login to view URL] the components dragged and dropped on the bibox ports attaches it and then neither the component nor the bibox is draggable. Bibox and components should be draggable such that user can place it anywhere on the screen. (try this on Bisoft(Assembly screen) on a tablet rather than mobile) [login to view URL] component and bibox should be connected by a bezier curve which adjusts according to dragging of bibox/components See the desired effect in "[login to view URL]" attached. [login to view URL] a component is dragged the ports that it can attach to are highlighted currently and on dropping the component on the port the attachment completes. This needs to be changed slightly to work like when the component dragged is close to a port highlighted it should auto-connect. [login to view URL] press on the component to delete the connection (as it is currently implemented) should continue to work. User experience should be smooth and there should be no issues while dragging one component over other or over bibox. Source Code and graphics will be provided. Experience in canvas could be useful.