First, boot to the Web
The application starts following the Linux system’s reboot. A monitor process is launched and starts to check whether the Gecko-based client is running or not. If not running, it starts the main process: a Gecko-based single window browsing engine with no toolbars in full screen.
The following image shows an overview of the web stack infrastructure that is launched. The web application sits above the engine in a similar way to applications such as Firefox or other Powered by Mozilla apps using Gecko.
Online and Offline
Once the web app comes from a local web server, a main HTML layout may bring inner HTML components that are loaded within iframes. This degree of separation exists to help developers to create isolated components in a standard test environment: all the components are made of plain pages. As part of this project, an experimental project script was created to help developers to quickly deploy new grid layouts — Gridtype.JS can take strings as arguments and can generate a grid layout that is tableless. The following example shows how to generate a grid of DIVs:
The above “string” specification will generate the following layout:
Free of pop-ups or unwanted desktop interfaces
There are many systems using online data to display information in TV appliances. Some of these systems are applications launched on top of the operating system graphic user interface. The following photos were taken from airports in 2012 in Brazil. These are a few of many examples of problems with unwanted user interface elements that are displayed on top of systems using operating system desktops. For this reason, and also the principle of simplicity and cost reduction, the designed approach was to launch Gecko from the basic X Window infra structure. Such approach ensures that no other visual applications are running at the same time, thus creating an improved quality experience without those unwanted pop-ups.
Routing Gecko pop-ups into frames
While OS desktop pop-ups are out of the scene, yet there are some conditions where Gecko used to display pop-ups to alert the user. The solution to this problem was to use Gecko’s preferences API and ask Gecko to display network error messages inline. With this, all errors are displayed in the iframe which is great because it is possible to track the errors and signal application logic outside the Gecko process. As an example, we can monitor the output console and change the layout depending on network error conditions. So, for example, if a weather channel frames brings a network error, the system should be able to launch an alternate layout.
Animation library with zoom and pan
The above elements are essential to keep the level of quality that is expected in enterprise environments. With this functional base, it’s when things can be creative and the web developer mindset rules. HTML5 and modern effects, provided by CSS3, can be used to help understand and improve the user experience in this scenario that is not the same of a desktop or a mobile.
<ul id="animation" style="display: none;"> <li data-target="slidea" data-time="1s" data-effect="scalefit" data-duration="3s"> </li> <li data-target="slideb" data-time="6s" data-effect="scalefit" data-duration="3s"> </li> <li data-target="slidec" data-time="12s" data-effect="scalefit" data-duration="3s"> </li> </ul>
The zoom and animation metaphor does a lot of the heavy work to ensure a level of smoothness in animation which is expected by users in front of a TV panel. Some effects can also be combined in time in order to produce engaging visual narratives as shown in the TagVisor video demonstration.
Web-driven, for adaptation
User experience is of major importance and a main reason for the use of a web-based infrastructure. Such model brings a level of dynamism supporting organisations who can tailor the system with custom data-sources using web services formats such as JSON or RSS. This approach has allowed us to test the screens with a variety of online sources; and to learn how the stream of web events can impact users in local organisations.
The following videos are examples of systems with Tela Social. The first video refers to the system at a major science park in Brazil (Press release in Portuguese). It’s an example with a variety of content areas that are tied to a variety of sources: from journalists to editors plus open channels using social networks. The second video shows an example where the TV appliance is set in vertical position.
People recognise that using data from events plus local interest content can build local participation. For most people, TV content is something far away and not tailored to their local community interests. To make things different, we have even used TVs in the vertical position to make a point that the whole experience was flipped and that content and interaction is bottom up.
The objective of the project is to develop web-based solutions that can be useful in spaces and bring social-aware experiences that are positive to local communities . While social features can be used in the mobile and on desktop, we believe that our approach can help communities because it extends the physical environment — it creates a social reflection to the environment. It’s a chance for custom web experiences that build awareness about contributions made by local communities and real-time data of interest. This approach also explores challenges in user interfaces since it engages people to interact in new ways: it’s not a direct touch like standard kiosks. It’s the web in the first place and opportunities for interaction are explored based on live data.