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Aptitude (software)
aptitude is a front-end to APT, the Debian package manager. It displays a list of software packages and allows the user to interactively pick packages to install or remove. It has an especially powerful search system utilizing flexible search patterns. It was initially created for Debian, but has appeared in RPM-based distributions as well. User interfaces ''aptitude'' is based on the ncurses computer terminal library, with which it provides an interface that incorporates some elements commonly seen in graphical user interfaces (GUIs) (such as pull-down menus). In addition to the ncurses interface, aptitude provides an extensive command-line interface (CLI). Even though aptitude is one executable file, it provides command-line functions similar to those of apt- family of tools (apt-get, apt-cache, apt-listchanges, etc.). aptitude also emulates most command-line arguments, allowing it to act as a full replacement for . In the past, it was recommended that aptitude and apt- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ncurses
ncurses (new curses) is a programming library providing an application programming interface (API) that allows the programmer to write text-based user interfaces (TUI) in a terminal-independent manner. It is a toolkit for developing "GUI-like" application software that runs under a terminal emulator. It also optimizes screen changes, in order to reduce the latency experienced when using remote shells. ncurses is a free-software emulation of the System V Release 4.0 (SVr4) curses. There are bindings for ncurses in a variety of programming languages, including Ada, Python, Gambas, Ruby, PHP, JavaScript, and Perl. History As the new version, ncurses is a free-software emulation of the System V Release 4.0 (SVr4) curses, which was itself an enhancement over the discontinued 4.4 BSD curses. The XSI Curses standard issued by X/Open is explicitly and closely modeled on System V. curses The first curses library was developed at the University of California at Berkeley, for a BSD ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dselect
dselect is a computer program used to manage software packages in the Debian operating system. dselect is one of the oldest front-ends to dpkg, and the bulk of its development happened when it was originally written by Ian Jackson, who wrote it alongside dpkg. The work on dselect started in dpkg version 0.93.12, and the first alpha release of dselect was made on March 27, 1995 in version 0.93.32. dselect was distributed in the dpkg package until June 21, 2002; even after it was split out into its own package, it was kept as a pre-dependency of dpkg in order to assist upgrades. It has been a standalone package since March 3, 2005. dselect has a text-mode user interface, a set of key bindings that is generally considered to be fairly non-intuitive, and its dependency resolution mechanism is suboptimal. dselect can now use apt as the back-end 'method' for installing packages. Today, dselect is largely superseded by Advanced Packaging Tool Advanced package tool, or APT, is a f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minesweeper (game)
Minesweeper is a logic puzzle video game genre generally played on personal computers. The game features a grid of clickable squares, with hidden "mines" scattered throughout the board. The objective is to clear the board without detonating any mines, with help from clues about the number of neighboring mines in each field. Variants of Minesweeper have been made that expand on the basic concepts, such as ''Minesweeper X'', ''Crossmines'', and ''Minehunt''. Minesweeper has been incorporated as a minigame in other games, such as ''RuneScape'' and ''Minecraft'' 2015 April Fools update. The origin of Minesweeper is unclear. According to ''TechRadar'', the first version of the game was 1990's '' Microsoft Minesweeper'', but ''Eurogamer'' says '' Mined-Out'' by Ian Andrew (1983) was the first Minesweeper game. Curt Johnson, the creator of ''Microsoft Minesweeper'', acknowledges that his game's design was borrowed from another game, but it was not ''Mined-Out'', and he does not reme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Modal Window
In user interface design for computer applications, a modal window is a graphical control element subordinate to an application's main window. A modal window creates a mode that disables the main window but keeps it visible, with the modal window as a child window in front of it. Users ''must'' interact with the modal window before they can return to the parent application. This avoids interrupting the workflow on the main window. Modal windows are sometimes called heavy windows or modal dialogs because they often display a dialog box. User interfaces typically use modal windows to command user awareness and to display emergency states, though interaction designers argue they are ineffective for that use. Modal windows are prone to mode errors. On the Web, they often show images in detail, such as those implemented by Lightbox library, or are used for hover ads. The opposite of modal is modeless. Modeless windows don't block the main window, so the user can switch their focus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pull-down Menus
In user interface design, a menu is a list of options or commands presented to the user of a computer or embedded system. A menu may either be a system's entire user interface, or only part of a more complex one. Navigation A user chooses an option from a menu by using an input device. Some input methods require linear navigation: the user must move a cursor or otherwise pass from one menu item to another until reaching the selection. On a computer terminal, a reverse video bar may serve as the cursor. Touch user interfaces and menus that accept codes to select menu options without navigation are two examples of non-linear interfaces. Some of the input devices used in menu interfaces are touchscreens, keyboards, mice, remote controls, and microphones. In a voice-activated system, such as interactive voice response, a microphone sends a recording of the user's voice to a speech recognition system, which translates it to a command. Types of menus A computer using a comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qt (software)
Qt (pronounced "cute") is cross-platform software for creating graphical user interfaces as well as cross-platform applications that run on various software and hardware platforms such as Linux, Windows, macOS, Android or embedded systems with little or no change in the underlying codebase while still being a native application with native capabilities and speed. Qt is currently being developed by The Qt Company, a publicly listed company, and the Qt Project under open-source governance, involving individual developers and organizations working to advance Qt. Qt is available under both commercial licenses and open-source GPL 2.0, GPL 3.0, and LGPL 3.0 licenses. Purposes and abilities Qt is used for developing graphical user interfaces (GUIs) and multi-platform applications that run on all major desktop platforms and most mobile or embedded platforms. Most GUI programs created with Qt have a native-looking interface, in which case Qt is classified as a ''widget toolkit''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GTK+
GTK (formerly GIMP ToolKit and GTK+) is a free and open-source cross-platform widget toolkit for creating graphical user interfaces (GUIs). It is licensed under the terms of the GNU Lesser General Public License, allowing both free and proprietary software to use it. It is one of the most popular toolkits for the Wayland and X11 windowing systems. The GTK team releases new versions on a regular basis. GTK 4 and GTK 3 are maintained, while GTK 2 is end-of-life. Software architecture The GTK library contains a set of graphical control elements ( widgets); version 3.22.16 contains 186 active and 36 deprecated widgets. GTK is an object-oriented widget toolkit written in the programming language C; it uses GObject, that is the GLib object system, for the object orientation. While GTK is mainly for windowing systems based on X11 and Wayland, it works on other platforms, including Microsoft Windows (interfaced with the Windows API), and macOS (interfaced with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Widget Toolkit
A widget toolkit, widget library, GUI toolkit, or UX library is a library or a collection of libraries containing a set of graphical control elements (called ''widgets'') used to construct the graphical user interface (GUI) of programs. Most widget toolkits additionally include their own rendering engine. This engine can be specific to a certain operating system or windowing system or contain back-ends to interface with more multiple ones and also with rendering APIs such as OpenGL, OpenVG, or EGL. The look and feel of the graphical control elements can be hard-coded or decoupled, allowing the graphical control elements to be themed/ skinned. Overview Some toolkits may be used from other languages by employing language bindings. Graphical user interface builders such as e.g. Glade Interface Designer facilitate the authoring of GUIs in a WYSIWYG manner employing a user interface markup language such as in this case GtkBuilder. The GUI of a program is commonly constructed in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Library (computing)
In computer science, a library is a collection of non-volatile memory, non-volatile resources used by computer programs, often for software development. These may include configuration data, documentation, help data, message templates, Code reuse, pre-written code and subroutines, Class (computer science), classes, Value (computer science), values or Data type, type specifications. In OS/360 and successors, IBM's OS/360 and its successors they are referred to as Data set (IBM mainframe)#Partitioned datasets, partitioned data sets. A library is also a collection of implementations of behavior, written in terms of a language, that has a well-defined interface (computing), interface by which the behavior is invoked. For instance, people who want to write a higher-level program can use a library to make system calls instead of implementing those system calls over and over again. In addition, the behavior is provided for reuse by multiple independent programs. A program invokes the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callback (computer Programming)
In computer programming, a callback or callback function is any reference to executable code that is passed as an argument to another piece of code; that code is expected to ''call back'' (execute) the callback function as part of its job. This execution may be immediate as in a synchronous callback, or it might happen at a later point in time as in an asynchronous callback. Programming languages support callbacks in different ways, often implementing them with subroutines, lambda expressions, blocks, or function pointers. Design There are two types of callbacks, differing in how they control data flow at runtime: ''blocking callbacks'' (also known as ''synchronous callbacks'' or just ''callbacks'') and ''deferred callbacks'' (also known as ''asynchronous callbacks''). While blocking callbacks are invoked before a function returns (as in the C example below), deferred callbacks may be invoked after a function returns. Deferred callbacks are often used in the context of I/O o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libsigc++
libsigc++ is a C++ library for typesafe callbacks. libsigc++ implements a callback system for use in abstract interfaces and general programming. libsigc++ is one of the earliest implementations of the signals and slots concept implemented using C++ template metaprogramming. It was created as an alternative to the use of a meta compiler such as found in the signals and slots implementation in Qt. libsigc++ originated as part of the gtkmm project in 1997 and later was rewritten to be a standalone library. Each signal has a particular function profile which designates the number of arguments and argument type associated with the callback. Functions and methods are then wrapped using template calls to produce function objects (functors) which can be bound to a signal. Each signal can be connected to multiple functors thus creating an observer pattern through which a message can be distributed to multiple anonymous listener objects. Reference counting based object lifespan t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Architecture
Software architecture is the fundamental structure of a software system and the discipline of creating such structures and systems. Each structure comprises software elements, relations among them, and properties of both elements and relations. The ''architecture'' of a software system is a metaphor, analogous to the architecture of a building. It functions as a blueprint for the system and the developing project, which project management can later use to extrapolate the tasks necessary to be executed by the teams and people involved. Software architecture is about making fundamental structural choices that are costly to change once implemented. Software architecture choices include specific structural options from possibilities in the design of the software. For example, the systems that controlled the Space Shuttle launch vehicle had the requirement of being very fast and very reliable. Therefore, an appropriate real-time computing language would need to be chosen. Addition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
