POSNow - a WPF intensive .NET client/server application

POSNow is a large-scale, modular & UI intensive application developed with .NET Technologies:

The major challenges of the POSNow project are:

Maintainability due to the size of the project - proper organisation of WPF resources with the use of different techniques - Style, Control Template, Data Template, Attached Properties (for attached behavior), Resource Dictionary, Visual Studio Project partitioning.
Adaptability to changes - the business objects modeling the business requirements could be changed frequently especially in the early stages of development. Entity Framework and a generic layer of WCF services providing standard CRUD operations are adopted to alleviate the ORM problem. We focused on single-point-of-changes in the database and automatically cascade the changes to the rest of the project from Server (Entities) to the frontend client (update Service Reference).
Diverse target user base and functional requirements - to support diverse range of customer POS system requirements, POSNow is designed and architectured with a novel approach that supports highly customisable & modular screen flows, UI compositions and data flows. The major yielded benefits include
- support for ad-hoc development team while maintaining software quality
- customisation at/after deployment at customer terminals.

The following screenshots provide an overview of POSNow and a sense of expertise involved in the project.

Login Option (POS or Back Office)

Animated UI Feedback to User (Data Loading In Progress)

Busy but Touch-Screen Friendly UI - Information Organisation

Modal Dialog (Screen on top of Screen - semi-transparent)

Data Input & List Style of Information Display

On Screen Keyboard for Touch Screen Input

Another Touch-Screen Friendly UI - Paging Style of Information Display