PATENT DOCUMENT

Publication Number: US-8127246-B2
Application Number: US-86566407-A
Country: US
Kind Code: B2

Title: Varying user interface element based on movement

Abstract:
Methods, systems, and apparatus, including computer program products, for presenting a user interface element. Movement of a user interface element that includes first and second pattern layers is detected. While the user interface element is moving, a first pattern layer is translated relative to a second pattern layer.

Claims:
What is claimed is: 
     
       1. A method comprising:
 detecting a direction of movement of a user interface element, the user interface element including a first pattern layer and a second pattern layer; 
 while the user interface element is moving, creating a graphical pattern using the first pattern layer and the second pattern layer, wherein creating the graphical pattern comprises:
 overlaying the first pattern layer on the second pattern layer; 
 translating the first pattern layer relative to the second pattern layer; 
 detecting a change in the direction of the movement; 
 inverting the first pattern layer and the second pattern layer in response to the detected change; and 
 translating, in the detected changed direction of the movement, the first pattern layer relative to the second pattern layer; and 
 
 providing the graphical pattern for display on the moving user interface element. 
 
     
     
       2. The method of  claim 1 , wherein translating the first pattern layer relative to the second pattern layer comprises translating the first pattern layer, in the detected direction of movement, relative to the second pattern layer. 
     
     
       3. The method of  claim 1 , wherein the user interface element is a slider. 
     
     
       4. The method of  claim 1 , wherein translating the first pattern layer relative to the second pattern layer comprises translating the first pattern layer at a rate that is a function of a rate of the movement of the user interface element. 
     
     
       5. The method of  claim 1 , wherein translating the first pattern layer relative to the second pattern layer comprises translating the first pattern layer at a rate linearly proportional to a rate of the movement of the user interface element. 
     
     
       6. The method of  claim 1 , wherein the user interface element comprises:
 a base layer; 
 a plurality of pattern layers, including the first and second pattern layers; and 
 a shaping layer. 
 
     
     
       7. The method of  claim 6 , wherein the user interface element is an alpha composite of the base later, the pattern layers, and the shaping layer. 
     
     
       8. A computer program product, encoded on a computer-readable storage device, operable to cause a data processing apparatus to perform operations comprising:
 detecting a direction of movement of a user interface element, the user interface element including a first pattern layer and second pattern layer; 
 while the user interface element is moving, creating a graphical pattern using the first pattern layer and the second pattern layer, wherein creating the graphical pattern comprises:
 overlaying the first pattern layer on the second pattern layer; 
 translating the first pattern layer relative to the second pattern layer; 
 detecting a change in the direction of the movement 
 inverting the first pattern layer and the second pattern layer in response to the detected change; and 
 translating, in the detected changed direction of the movement, the first pattern layer relative to the second pattern layer; and 
 
 providing the graphical pattern for display on the moving user interface element. 
 
     
     
       9. The computer program product of  claim 8 , wherein the user interface element is a slider. 
     
     
       10. The computer program product of  claim 8 , further operable to cause the data processing apparatus to perform operations comprising translating the first pattern layer at a rate that is a function of a rate of the movement of the user interface element. 
     
     
       11. The computer program product of  claim 8 , further operable to cause the data processing apparatus to perform operations comprising translating the first pattern layer at a rate linearly proportional to a rate of the movement of the user interface element. 
     
     
       12. The computer program product of  claim 8 , wherein the user interface element comprises:
 a base layer; 
 a plurality of pattern layers, including the first and second pattern layers; and 
 a shaping layer. 
 
     
     
       13. The computer program product of  claim 12 , wherein the user interface element is an alpha composite of the base layer, the pattern layers, and the shaping layer. 
     
     
       14. A system, comprising:
 one or more processors configured to perform operations comprising:
 detecting a direction movement of a user interface element, the user interface element including a first pattern layer and a second pattern layer; 
 while the user interface element is moving, creating a graphical pattern using the first pattern layer and the second pattern layer, wherein creating the graphical pattern comprises:
 overlaying the first pattern layer on the second pattern layer; and 
 translating the first pattern layer relative to the second pattern layer; 
 detecting a change in the direction of the movement 
 inverting the first pattern layer and the second pattern layer in response to the detected change; and 
 translating, in the detected changed direction of the movement, the first pattern layer relative to the second pattern layer; and 
 
 providing the graphical pattern for display on the moving user interface element. 
 
 
     
     
       15. The system of  claim 14 , wherein the user interface element comprises:
 a base layer defining a color of the user interface element; 
 the first pattern layer defining a first graphical pattern; 
 the second pattern layer defining a second graphical pattern; and 
 a shaping layer defining a shape of the user interface element. 
 
     
     
       16. The system of  claim 15 , wherein the first graphic pattern and the second graphic pattern each comprises a series of spaced-apart wave shapes. 
     
     
       17. The system of  claim 16 , wherein the first graphic pattern includes a series of thick waves, and the second graphic pattern includes a series of thin waves. 
     
     
       18. A method, comprising:
 detecting a direction of movement of a user interface element, the user interface element including a first pattern layer and a second pattern layer; 
 while the user interface element is moving, creating an animated effect, wherein creating the animated effect comprises:
 overlaying the first pattern layer on the second pattern layer; and 
 translating the first pattern layer relative to the second pattern layer 
 
 detecting a change in direction of the movement; 
 inverting the first pattern layer and the second pattern layer in response to the detected change; and 
 while the user interface element is moving, translating, in the detected changed direction of the movement, the first pattern layer relative to the second pattern layer. 
 
     
     
       19. The method of  claim 1 , wherein the first pattern layer comprises a repeating pattern of transparent portions and opaque portions. 
     
     
       20. The method of  claim 19 , wherein the repeating pattern is a wave pattern.

Description:
BACKGROUND 
     The subject matter of this specification relates generally to graphical user interfaces. 
     Many of today&#39;s computers and devices include a graphical user interface (“GUI”), through which a user can interact with the computer or device. A GUI can include various user interface elements, such as windows, scroll bars, and so on. Some of these elements can be manipulated by users to perform actions. For example, the user can click on a window or a scroll bar and move it within the GUI. Conventional user interface elements are often static in their appearance, which can detract from the overall look and feel of the GUI. 
     SUMMARY 
     In general, one aspect of the subject matter described in this specification can be embodied in methods that include the actions of detecting movement of a user interface element including first and second pattern layers, and while the user interface element is moving, translating a first pattern layer relative to a second pattern layer. Other embodiments of this aspect include corresponding systems, apparatus, computer program products, and computer readable media. 
     In general, one aspect of the subject matter described in this specification can be embodied in methods that include the actions of detecting movement of a user interface element, and while the user interface element is moving, modifying a graphical characteristic of the user interface element. Other embodiments of this aspect include corresponding systems, apparatus, computer program products, and computer readable media. 
     Particular embodiments of the subject matter described in this specification can be implemented to realize one or more of the following advantages. Movable user interface elements can be made more aesthetically pleasing during movement of the elements. 
     The details of one or more embodiments of the subject matter described in this specification are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a block diagram of an example of a system architecture for generating and presenting user interface elements. 
         FIGS. 2A-2B  are diagrams illustrating an example structure of a user interface element and components of the user interface element. 
         FIG. 3  is a flow diagram illustrating an example process for generating a user interface element. 
         FIG. 4  is a flow diagram illustrating an example process for changing the appearance of a user interface element based on movement of the user interface element. 
         FIG. 5  illustrates example graphical layers and a user interface element formed from the layers. 
         FIG. 6  illustrates example translations of a pattern layer relative to another pattern layer within a user interface element. 
     
    
    
     Like reference numbers and designations in the various drawings indicate like elements. 
     DETAILED DESCRIPTION 
       FIG. 1  is a block diagram of an architecture  100  for generating and presenting user interface elements that can be manipulated within a user interface by a user. The architecture  100  includes a personal computer  102 . The computer  102  is optionally communicatively coupled to a remote server  107  or other computer system using a network interface  116  and a network  108  (e.g., local area network, wireless network, Internet, intranet, etc.). The computer  102  generally includes a processor  103 , memory  105 , one or more input devices  114  (e.g., keyboard, mouse, etc.) and one or more output devices  115  (e.g., a display device). A user interacts with the architecture  100  using the input and output devices  114  and  115 , respectively. Architecture  100  can include hardware, software, and combinations of the two. 
     The computer  102  also includes a local storage device  106  and a graphics module  113  (e.g., graphics card) for storing information and generating user interface elements, respectively. The local storage device  106  can be a computer-readable medium. The term “computer-readable medium” refers to any medium that includes data and/or participates in providing instructions to a processor for execution, including without limitation, non-volatile media (e.g., optical or magnetic disks), volatile media (e.g., memory) and transmission media. Transmission media includes, without limitation, coaxial cables, copper wire, fiber optics, and computer buses. Transmission media can also take the form of acoustic, light or radio frequency waves. 
     While generating and presenting user interface elements are described with respect to a personal computer  102 , it should be apparent that the disclosed implementations can be incorporated in, or integrated with, any electronic device that has a user interface, including without limitation, portable and desktop computers, servers, electronics, media players, game devices, mobile phones, smart phones, email devices, personal digital assistants (PDAs), embedded devices, televisions, other consumer electronic devices, set top boxes, etc. 
     One of ordinary skill in the art will recognize that the engines, methods, processes and the like that are described can themselves be an individual process or application, part of an operating system, a plug-in, an application, or the like. In one implementation, the system and methods can be implemented as one or more plug-ins that are installed and run on the personal computer  102 . The plug-ins are configured to interact with an operating system (e.g., MAC OS X, WINDOWS XP, WINDOWS VISTA, LINUX, etc.) and to perform the various functions, as described with respect to  FIGS. 2A-6 . A system and method for generating user interface elements can also be implemented as one or more software applications running on the computer  102 . Such a system and method can be characterized as a framework or model that can be implemented on various platforms and/or networks (e.g., client/server networks, wireless networks, stand-alone computers, portable electronic devices, mobile phones, etc.), and/or embedded or bundled with one or more software applications (e.g., email, media player, browser, etc.). 
     The computer  102  can store data items, such as files and other data objects, in the local storage device  106 , for example. Examples of data items include documents, images or graphics, video clips, audio clips, and so forth. 
     In some implementations, the computer  102  can generate and present user interfaces that include one or more user interface elements. Examples of user interface elements include, without limitation, windows, buttons, scroll bars, icons, sliders, tabs, toolbars, and so on. 
     In some implementations, a user interface includes one or more user interface elements that can be manipulated by a user. The user interface elements can serve as control points through which the user can manipulate the user interface and communicate with the computer  102 . Examples of user interface elements that can be manipulated by a user include scroll bars, sliders, buttons, and so on. For example, a window can include one or more scroll bars, which the user can use to scroll through content presented in the window. 
     In some implementations, a user interface element in the user interface can be moved by the user. The user, for example, can click on a user interface element (e.g., a scroll bar, a slider) and drag it to move it. Depending on the particular element, a user interface element can be moved freely within the bounds of the display screen or be constrained to move along a predefined path. 
       FIGS. 2A-2B  illustrate an example user interface element  200 . In some implementations, a user interface element is generated from multiple graphical layers. In some implementations, the user interface element is a composite of a base layer  202 , one or more pattern layers  204 , and a shaping layer  206 . 
     The base layer  202  defines one or more basic characteristics of the user interface element  200 . In some implementations, the base layer  202  is a graphic that includes the color of the user interface element  200 . For example, the base layer  202  can be a shape that is filled with the desired color for the user interface element  200 . 
     One or more pattern layers  204  (shown as pattern layers  204 -A and  204 -B) define one or more graphical patterns on the user interface element  200 . In some implementations, a pattern layer is a graphic that includes a graphical pattern. An example of a graphical pattern is a series of spaced-apart wave shapes. In some implementations, each of the pattern layers  204  has respective patterns, and visual effects on the user interface element  200  can be generated by translating the pattern layers relative to each other. In some implementations, patterns overlaid on the base layer  202  take on the color of the base layer  202  or some shade thereof. 
     A shaping layer  206  defines a shape of the user interface element  200 . In some implementations, the shaping layer  206  includes an area that is in the desired shape for the user interface element. For example, if the user interface element  200  is a scroll bar, the shaping layer  206  can include an area that is generally rectangular with square or rounded ends. When the shaping layer  206  is overlaid over the other layers, such as the base layer  202  and the pattern layers  204 , the rectangular area encloses portions of the layers  202 ,  204 , including the colors and patterns from layers  202 ,  204 . The enclosed area, including the color and patterns, is combined and rendered as the user interface element. 
     In some implementations, the user interface element can further include a control details layer. The control details layer defines what actions can be performed on the user interface element or how the user interface element can be manipulated by a user. In some other implementations, control details can be included in the base layer  202 . 
     Some user interface elements can be manipulated by a user. For example, a user can click-and-drag a scroll bar or a slider to move it along a predefined path. In some implementations, while a user interface element is moving (e.g., dragged by a user), one or more pattern layers  204  can be translated or shifted relative to other pattern layers within the user interface element. As shown in  FIG. 2B , when the user interface element  200  is moved in the direction of movement  208 , pattern  204 -A can be shifted relative to pattern  204 -B in the direction of movement  208 . The shifting or translation can be used to simulate animation or some other visual effect in the user interface element while the user interface element is being moved. Further details of the translation of patterns relative to each other are described below. 
       FIG. 3  illustrates an example process  300  for generating a user interface element. For convenience, the process  300  will be described in reference to a system (e.g., system  100 ) that performs the process. 
     A base layer is generated ( 302 ). In some implementations, the graphics module  113  can generate the base layer based on predefined specifications. For example, the graphics module  113  generates a base layer that is filled with a particular color. In some implementations, a generated base layer includes alpha channel values. In some other implementations, the base layer can further include control details based on the user interface element to be generated. 
     One or more pattern layers are generated ( 304 ). The graphics module  113  can generate a pattern layer based on predefined pattern specifications. In some implementations, a generated pattern layer includes alpha channel values. In some implementations, the graphics module  113  can generate multiple graphical layers, each with its own pattern. In an example implementation, a pattern is alpha masked into a layer by the graphics module  113 . 
     A shaping layer is generated ( 306 ). In some implementations, the graphics module  113  can generate a shaping layer for a desired user interface element based on predefined specifications. For example, if the desired user interface element is a scroll bar, a scroll bar shaping layer is generated. On the other hand, if the desired user interface element is a slider control, a slider shaping layer is generated. In some other implementations, there are stored in the computer  102  predefined shaping layers for various user interface elements. The graphics module  113  identifies and retrieves the appropriate shaping layer based on the desired user interface element. 
     In some implementations, additional layers can be generated. For example, a control details layer can be generated by the graphics module  113 . The control details layer defines limitations on how users can manipulate the user interface element. 
     A user interface element is generated ( 308 ). In some implementations, the user interface element is generated by compositing the generated layers. For example, the graphics module  113  can composite the base layer, the one or more pattern layers, and the shaping layer to form a user interface element. In some implementation, the compositing is performed using alpha masking techniques, which are well-known in the art. 
       FIG. 4  illustrates an example process  400  for changing the appearance of a user interface element based on movement of the user interface element. For convenience, the process  400  will be described in reference to a system (e.g., system  100 ) that performs the process. 
     An input moving the user interface element is received ( 402 ). In some implementations, a user can direct the system  100  to move a displayed user interface element. For example, a user can, using an input device (e.g., a mouse), select (e.g., by clicking) the user interface element and drag the user interface element to move it. 
     Movement of the user interface element is detected ( 404 ). The system  100  detects, based on the received input, movement of the user interface element by the user. In some implementations, system  100  also detects the direction of the movement. 
     While the user interface element is moving, one or more pattern layers in the user interface element is/are translated relative to one or more other patterns layers in the user interface element ( 406 ). As the user interface element moves in response to user input, the system  100  shifts one or more pattern layers within the user interface element relative to other pattern layers in the user interface element, while all of the pattern layers in the user interface element are moving together as part of the user interface element. The shift of a pattern layer relative to the other pattern layers can be in the direction of the movement of the user interface element. Thus, for example, if the user interface element is moving horizontally rightward, the pattern is translated rightward relative to the other patterns. 
     In some implementations, the rate at which a pattern layer is translated is a function of the speed at which the user interface element moves. In one implementation, the translation is pixel-for-pixel with respect to the user interface element. That is, the pattern on the pattern layer is translated one pixel relative to the patterns on the other pattern layers for each pixel of movement of the user interface element. In another implementation, the translation rate is linearly proportional to the speed at which the user interface element is moving. In a further implementation, the translation rate is non-linearly proportional to the speed at which the user interface element is moving. In yet another implementation, the translation rate is a constant, regardless of how fast the user interface element is moving. 
     The translation (e.g., of a pattern layer relative to other pattern layers) stops when the user interface element stops moving. If the user interface element moves again in the same direction as before, the translation resumes. 
     In some implementations, one or more of the pattern layers in the user interface element can be translated relative to the other pattern layers in the user interface element. The pattern layers that are translated can all have the same translation rate, or each of these pattern layers can have its own translation rate. 
     The direction of movement of the user interface element can be changed by the user through an input device  114 . The system  100  can detect the change in direction based on the received user input. In some implementations, the pattern layers on the user interface element can be changed (e.g., reversed) in response to the change in direction, reversing the patterns on the reversed layers. In this example, one or more of the reversed patterns are translated in the new direction of movement relative to the other patterns. 
     The translation of the patterns in the user interface element is displayed on-screen. The user perceives the translation as a visual effect on the user interface element that occurs when the user interface element is moved. 
       FIG. 5  illustrates a conceptual example of graphical layers and a scroll bar user interface element formed from the layers. A base layer  502  includes a color (represented by the dots). One or more pattern layers  504  and  506  each have a pattern on it. For example, pattern layer  504  includes a pattern of repeating thick waves and pattern layer  506  includes a pattern of repeating thin waves. In some implementations, the patterns on the pattern layers are continuous; the patterns are not depleted by the translation. Thus, for example, when a pattern is translated out of view at one end of the user interface element, the pattern is translated into view at the opposite end. 
     Shaping layer  508  includes an area  512  that defines the shape of the user interface element to be generated and an opaque area  514  that masks out the portions of the layers that are outside of the area  512 . 
     The layers  502 ,  504 ,  506 , and  508  can be composited using alpha masking techniques, for example. The result of the compositing is a scroll bar  510 . The scroll bar  510  has the shape defined by area  512 . The patterns in layers  504  and  506  are combined. Parts of the scroll bar  510  adopts the color of the base layer  502  and other parts of the scroll bar  502  adopt a shade of the base layer color, depending on the alpha channel values in the layers. 
       FIG. 6  illustrates example translations of a pattern layer relative to another pattern within the scroll bar  510 . Scroll bar  510 -A shows the scroll bar at rest. When the scroll bar is moved rightward, the thin waves pattern (i.e., pattern layer  506 ) is translated rightward relative to the thick waves pattern (i.e., pattern layer  504 ), as shown in scroll bar  510 -B. If the scroll bar moves leftward, the patterns are reversed and the thin waves pattern (i.e., pattern layer  506 ) is translated leftward relative to the thick waves pattern (i.e., pattern layer  504 ), as shown in scroll bar  510 -C. 
     While the implementations described above describe translating pattern layers in response to movement of the user interface element, other graphical changes to the user interface element can be performed in response to movement of the user interface element. For example, a user interface element can include one or more layers that define lighting, shading, or color characteristics for the user interface element. When the user moves the user interface element, the layer or layers change to change the lighting, shading, or color characteristics of the user interface element. For example, a vertical scrollbar can have a brighter shading as it is moved closer to the top, and a darker shading as it is moved closer to the bottom. 
     More generally, various graphical characteristics of one or more elements in a graphical user interface can be changed in response to various conditions or inputs at the computer  102 , or in response to satisfaction of particular conditions or criteria, not just user input from a user input device. For example, the color or brightness of a menu bar can be changed based on the time of day, amount of computer use, activity or idleness of the computer, and so on. Further, in some implementations, the entire graphical user interface, not just particular user interface elements, can be changed in response to satisfaction of some condition or criterion. 
     The disclosed and other embodiments and the functional operations described in this specification can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in this specification and their structural equivalents, or in combinations of one or more of them. The disclosed and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by, or to control the operation of, data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter effecting a machine-readable propagated signal, or a combination of one or more them. The term “data processing apparatus” encompasses all apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers. The apparatus can include, in addition to hardware, code that creates an execution environment for the computer program in question, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. A propagated signal is an artificially generated signal, e.g., a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to suitable receiver apparatus. 
     A computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub-programs, or portions of code). A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network. 
     The processes and logic flows described in this specification can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit). 
     Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a processor for performing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical disks, or optical disks. However, a computer need not have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including by way of example semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry. 
     To provide for interaction with a user, the disclosed embodiments can be implemented on a computer having a display device, e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor, for displaying information to the user and a keyboard and a pointing device, e.g., a mouse or a trackball, by which the user can provide input to the computer. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback, e.g., visual feedback, auditory feedback, or tactile feedback; and input from the user can be received in any form, including acoustic, speech, or tactile input. 
     The disclosed embodiments can be implemented in a computing system that includes a back-end component, e.g., as a data server, or that includes a middleware component, e.g., an application server, or that includes a front-end component, e.g., a client computer having a graphical user interface or a Web browser through which a user can interact with an implementation of what is disclosed here, or any combination of one or more such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication, e.g., a communication network. Examples of communication networks include a local area network (“LAN”) and a wide area network (“WAN”), e.g., the Internet. 
     The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. 
     While this specification contains many specifics, these should not be construed as limitations on the scope of what being claims or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination. 
     Similarly, while operations are depicted in the drawings in a particular order, this should not be understand as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the embodiments described above should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products. 
     Thus, particular embodiments have been described. Other embodiments are within the scope of the following claims.

Metadata:
Filing Date: 20071001
Publication Date: 20120228
Grant Date: 20120228
Priority Date: 20071001
Inventors: FURCHES ELIZABETH CAROLINE
CHAUDHRI IMRAN A
ORDING BAS
Assignee: APPLE INC
CPC Classifications: [{"code": "G06F3/04855", "inventive": true, "first": true, "tree": "[]"}, {"code": "G06F3/04855", "inventive": true, "first": true, "tree": "[]"}]
Family ID: 40509832