Incomputing, azooming user interface orzoomable user interface (ZUI, pronounced zoo-ee) is a type ofgraphical user interface (GUI) whereusers can change the scale of theviewed area in order to see more detail or less, and browse through differentdocuments. Information elements appear directly on an infinitevirtual desktop (usually created usingvector graphics), instead of in windows. Users canpan across the virtual surface in two dimensions andzoom into objects of interest. For example, as you zoom into a text object it may be represented as a small dot, then a thumbnail of a page of text, then a full-sized page and finally a magnified view of the page.
ZUIs use zooming as the main metaphor for browsing throughhyperlinked ormultivariate information.Objects present inside a zoomed page can in turn be zoomed themselves to reveal further detail, allowing forrecursivenesting and an arbitrary level of zoom.
When the level of detail present in the resized object is changed to fit the relevant information into the current size, instead of being a proportional view of the whole object, it's called semantic zooming.[1]
Some consider the ZUI paradigm as a flexible and realistic successor to the traditional windowing GUI, being aPost-WIMP interface.[citation needed]
Ivan Sutherland presented the first program for zooming through and creating graphical structures with constraints andinstancing, on a CRT in hisSketchpad program in 1962.[2]
A more general interface was done by theArchitecture Machine Group in the 1970s at MIT. Hand tracking,touchscreen,joystick, andvoice control were employed to control an infinite plane of projects, documents, contacts, video and interactive programs. One of the instances of this project was called Spatial Dataland.[3]
Another GUI environment of the 70's, which used the zooming idea wasSmalltalk atXerox PARC, which had infinitedesktops (only later named such byApple Computer), that could be zoomed in upon from a birds eye view after the user had recognized a miniature of the window setup for the project.
The longest running effort to create a ZUI has been the Pad++ project begun byKen Perlin,Jim Hollan, andBen Bederson atNew York University and continued at theUniversity of New Mexico under Hollan's direction. After Pad++, Bederson developed Jazz, then Piccolo,[4] and now Piccolo2D[5] at theUniversity of Maryland, College Park, which is maintained inJava andC#. More recent ZUI efforts includeArchy by the lateJef Raskin,ZVTM developed atINRIA (which uses the Sigma lens[6] technique), and the simple ZUI of theSqueakSmalltalk programming environment and language. The term ZUI itself was coined byFranklin Servan-Schreiber and Tom Grauman while they worked together at theSony Research Laboratories. They were developing the first Zooming User Interfacelibrary based on Java 1.0, in partnership with Prof. Ben Bederson,University of New Mexico, and Prof. Ken Perlin,New York University.
GeoPhoenix, a Cambridge, MA, startup associated with theMIT Media Lab, founded by Julian Orbanes, Adriana Guzman, Max Riesenhuber, released the first mass-marketed commercial Zoomspace in 2002–03 on the SonyCLIÉpersonal digital assistant (PDA) handheld, with Ken Miura of Sony
In 2002, Pieter Muller extended theOberon System with a zooming user interface and named itActive Object System (AOS).[7] In 2005, due to copyright issues, it was renamed toBluebottle, and in 2008, toA2.
In 2006,Hillcrest Labs introduced the HoME television navigation system, the first graphical, zooming interface for television.[8]
In 2007, Microsoft's Live Labs released a zooming UI for web browsing calledMicrosoft Live Labs Deepfish for the Windows Mobile 5 platform.
Apple'siPhone (premiered June 2007) uses a stylized form of ZUI, in which panning and zooming are performed through atouch user interface (TUI). A more fully realised ZUI is present in theiOS home screen (as ofiOS 7), with zooming from the homescreen in to folders and finally in to apps. The photo app zooms out from a single photo to moments, to collections, to years, and similarly in the calendar app with day, month and year views.[9] It is not a full ZUI implementation since these operations are applied to bounded spaces (such as web pages or photos) and have a limited range of zooming and panning.
Franklin Servan-Schreiber founded Zoomorama, based on work he did at the Sony Research Laboratories in the mid-1990s. The Zooming Browser for Collage of High Resolution Images was released in Alpha in October 2007. Zoomorama's browser is all Flash-based. In 2010, project development ended, but many examples are still available on the site.
From 2008 to 2010,GNOME Shell used a zooming user interface for virtual workspaces management.[10] This ZUI was eventually replaced by a different, scrolling-based design.
In 2017, bigpictu.re offers an infinite (pan and zoom) notepad as a web application based on one of the first ZUI open-source libraries.[11]
In 2017, Zircle UI was released. It is an open source UI library that uses zoomable navigation and circular shapes.[12]
In 2022, theMiro collaboration platform, what is a zooming user interface, reported 40 million users. It was released in 2011 as RealtimeBoard and in 2019 rebranded as Miro.