1. Yet Another Web GUI Framework Göran Båge, Johan Blom

2. 2 Mobile Arts Provides Messaging & Presence products to Mobile Network Operators  Offices in Stockholm and London  References in Europe  Founded 2001 by a team of mobile telecom experts with extensive experience from development and standardisation of GSM/UMTS/PDC/PCS platforms and applications, such as  HLR, MSC/VLR, SSF, SCF, WAP-GW, MLC  PrePaid Systems, Unified Messaging Systems  www.mobilearts.se

3. 3 Background  GUI for an Alteon/Nortel Product  Beautiful & powerful  Never released?  Client required Erlang and GTK  CLI and GUI for Mobile Arts products  Web based GUI

4. 4 Some observations  Using a graphics environment, e.g GTK, Java  Web based GUI +Everyone has a browser +No need to install special client software  Only polling  Browser differences  Limited layout control +Powerful +Detailed layout  Client box need special software

5. 5 Mobile Arts GUI, first implementation  Started out pure and simple  Standard HTML only  No frames  CSS  but reality rules  Frames  Javascript  Messy result  Browser dependencies (support Netscape 4, 7 and IE) in Javascript and CSS  Many pages with similar functionality and layout

6. 6 Template based GUI  XML like template notation  Separate different views  Static structure and layout  Dynamic content - interface to application  button actions  table content and options  parameter checks ...  Help texts

7. 7 How it works xmerl parse tree xxx_gui.erl xxx.gul code_lib.erl jnets URL: …/xxx:entry gui_lib.erl gui_lib.js HTML code_gen