Software as a service: Undo

This paper proposes a highly automated mechanism to build an undo facility into a new or existing system easily. Our proposal is based on the observation that for a large set of operators it is not necessary to store in-memory object states or executed system commands to undo an action; the storage of input data is instead enough. This strategy simplifies greatly the design of the undo process and encapsulates most of the functionalities required in a framework structure similar to the many object-oriented programming frameworks

Interactive Visual Histories for Vector Graphics

Presentation and graphics software enables users to experiment with variations of illustrations. They can revisit recent editing operations using the ubiquitous undo command, but they are limited to sequential exploration. We propose a new interaction metaphor and visualization for operation history. While editing, a user can access a history mode in which actions are denoted by graphical depictions appearing on top of the document. Our work is inspired by the visual language of film storyboards and assembly instructions. Our storyboard provides an interactive visual history, summarizing the editing of a document or a selected object. Each view is composed of action depictions representing the userâ s editing actions and enables the user to consider the operation history in context rather than in a disconnected list view. This metaphor provides instant access to any past action and we demonstrate that this is an intuitive interface to a selective undo mechanism

A multi-user selective undo/redo approach for collaborative CAD systems

AbstractThe engineering design process is a creative process, and the designers must repeatedly apply Undo/Redo operations to modify CAD models to explore new solutions. Undo/Redo has become one of most important functions in interactive graphics and CAD systems. Undo/Redo in a collaborative CAD system is also very helpful for collaborative awareness among a group of cooperative designers to eliminate misunderstanding and to recover from design error. However, Undo/Redo in a collaborative CAD system is much more complicated. This is because a single erroneous operation is propagated to other remote sites, and operations are interleaved at different sites. This paper presents a multi-user selective Undo/Redo approach in full distributed collaborative CAD systems. We use site ID and State Vectors to locate the Undo/Redo target at each site. By analyzing the composition of the complex CAD model, a tree-like structure called Feature Combination Hierarchy is presented to describe the decomposition of a CAD model. Based on this structure, the dependency relationship among features is clarified. B-Rep re-evaluation is simplified with the assistance of the Feature Combination Hierarchy. It can be proven that the proposed Undo/Redo approach satisfies the intention preservation and consistency maintenance correctness criteria for collaborative systems

Service Oriented Architecture for Undo Functionality

This paper proposes a highly automated mechanism to build an undo facility into a new or existing system easily encapsulated into a service. Our proposal is based on the observation that for a large set of operators it is not necessary to store in-memory object states or executed system commands to undo an action; the storage of input data is instead enough. The use of services strategy simplifies greatly the design of the undo process and encapsulates most of the functionalities required in a framework structure similar to the many object-oriented programming frameworks. We present a proof of concept illustrating the simplicity and reusability of the proposed framework under alignments of Software as a Service.Trabajo presentado en el VI International Conference on Research and Practical Issues of Enterprise Information Systems, realizado del 19 al 21 de septiembre en Bélgica

Service Oriented Architecture for Undo Functionality

This paper proposes a highly automated mechanism to build an undo facility into a new or existing system easily encapsulated into a service. Our proposal is based on the observation that for a large set of operators it is not necessary to store in-memory object states or executed system commands to undo an action; the storage of input data is instead enough. The use of services strategy simplifies greatly the design of the undo process and encapsulates most of the functionalities required in a framework structure similar to the many object-oriented programming frameworks. We present a proof of concept illustrating the simplicity and reusability of the proposed framework under alignments of Software as a Service.Facultad de Informátic

Modelo de inclusión de la funcionalidad UNDO/REDO

Se propone la utilización de un servicio de software (SaaS) junto a una metodología para realizar en forma ordenada la inclusión de la funcionalidad de Undo/Redo dentro de una aplicación nueva o existente.Eje: Workshop Innovación en sistemas de software (WISS)Red de Universidades con Carreras en Informática (RedUNCI

Software as a Service: Undo

This paper proposes a highly automated mechanism to build an undo facility into a new or existing system easily. Our proposal is based on the observation that for a large set of operators it is not necessary to store in-memory object states or executed system commands to undo an action; the storage of input data is instead enough. This strategy simplifies greatly the design of the undo process and encapsulates most of the functionalities required in a framework structure similar to the many object-oriented programming frameworks.Facultad de Informátic

Service Oriented Architecture for Undo Functionality

This paper proposes a highly automated mechanism to build an undo facility into a new or existing system easily encapsulated into a service. Our proposal is based on the observation that for a large set of operators it is not necessary to store in-memory object states or executed system commands to undo an action; the storage of input data is instead enough. The use of services strategy simplifies greatly the design of the undo process and encapsulates most of the functionalities required in a framework structure similar to the many object-oriented programming frameworks. We present a proof of concept illustrating the simplicity and reusability of the proposed framework under alignments of Software as a Service.Facultad de Informátic

Regional undo/redo techniques for large interactive surfaces

When multiple users are simultaneously sharing a work-space, it is not always clear what should happen when a user invokes an undo action. In this paper we explore dif-ferent user interfaces for undo/redo for co-located collabo-rative workspaces, such as large interactive whiteboards. A preliminary study revealed that users expect neither a global nor personal undo, but rather a regional undo. We propose and evaluate three automatic regional undo/redo techniques (clustering, workspace, field of view) designed for a large interactive whiteboard. The results of the evaluation showed that an undo technique based on users ’ field of view was most preferred, while the content-based clustering technique produced most errors. We conclude with poten-tial improvements to the developed techniques, and propose a set of design recommendations for implementing regional undo/redo on large interactive surfaces. Author Keywords Undo; co-located collaboration; interactive surfaces; inter

Figure 1. Aquamarine's History Panel showing operation #10 (brush stroke for the nose) selectively undone. Selective Undo Support for Painting Applications

ABSTRACT Today's widely deployed painting applications use a linear undo model that allows users to backtrack previous operations in reverse chronological order. This undo model is not useful if the user has performed desired operations after undesired ones. Selective undo, in contrast, allows users to select specific operations in the past and only undo those, while keeping the remaining operations intact. Although selective undo has been widely explored in the context of text editing and object-oriented drawing, we explore selective undo for painting (bitmap) editing, which has received less attention and introduces many interesting user interface design challenges. Our system, called Aquamarine, explores the script model for selective undo, where selectively undone operations are skipped in the history, rather than the more explored inverse model, which puts an inverse of the selected operations at the end of the history. We discuss the design implications and show through two informal user studies that selective undo is usable and desirable