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A tab in Graphical User Interface s is a typically rectangular small box (usually containing a text Label and/or an Icon ) associated graphically with a View Pane . When activated (e.g. by a Mouse click), the view pane displays Widget s associated with the tab. A single tab is obviously not useful, but a '''tab group''' comprising several tabs allows the user to switch quickly between different widgets (which are displayed in the view pane belonging to the tab group). The active (or foreground) tab is typically highlighted in a way that makes it seem to stick out of the rest of the tab group, though sometimes, only color or size changes indicate the currently selected tab. Since these share the same part of the Window , it is not necessary to use Scrollbar s in order to fit more inputs and outputs on the screen than otherwise possible. While similar effects could be achieved e.g. by Listbox es, drop-down lists, buttons and pulldown menus, tabs are often employed to give the user interface a more "natural" look, by making the selection widgets (most often attached to the top of the view pane) resemble traditional card tabs inserted in paper files, or card indexes. USAGE Tabs in modern GUI s at first became widely used to make option-laden Dialog Box es easier to understand and navigate, by grouping similar or related options into one tab pane each. Some applications base their main interaction on tabs, using a Tabbed Document Interface . Browsers In the last few years, tabs have also become quite popular in Web Browser s, where they are used to switch between different Webpage s without having to switch top-level windows. Tabs are now supported by all major browsers except Internet Explorer , although tab-capable third-party extensions and Front-end s to Internet Explorer are available. With the exception of Opera 4 and up, tabs in these browsers are Orthogonal to top-level windows, which means they may be seen as a supplementary rather than competing way of opening numerous browser windows at the same time. Numerous special functions in association with browser tabs have emerged since then, for example the ability to re-order tabs (e.g. in Opera, Konqueror , and Firefox, as well as Mozilla with suitable extensions), and to bookmark all of the webpages opened in tab panes in a given window in a group or bookmark folder (as well as the ability to reopen them all at the same time). Links can most often be opened in several modes, using different user interface options and commands:
Controversy Tabs in browsers often seem to be either loved, or hated. Proponents argue that they can be used to improve navigation across a multitude of open webpages, while opponents hold that Window Manager features such as automatic grouping of windows of the same application provide all necessary functionality. Some proponents in turn feel that since these two feature sets can be used concurrently, there is no reason for a strict either/or stance. PATENT DISPUTE Adobe Systems holds Patent s in the United States and Europe on tabs in general or certain uses of GUI tabs, which are widely held to be Trivial Patent s. Also, some argue that there are hints for Prior Art , e.g. in text-mode user interfaces. Adobe has used these patents to sue Macromedia Inc. for employing tabs in its Macromedia Flash product. The case was won by Adobe, earning them $2.8 million of damages, however a Countersuit initiated by Macromedia ended in a $4.9 million ruling at Adobe's expense. The suits were then settled on undisclosed terms. |
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