本文主要是介绍[其他] GNome KDE / GTK GTK+ Qt / GDK / Glib，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
GTK, GTK+, and Qt are GUI toolkits. These are libraries that developers use to design graphical interfaces, all running on top of the X Server or Wayland. These are things that you need to install as dependencies. They're the Linux "equivalent" to Windows' GDI/GDI+. When an application uses any of these, it will usually have a general "look and feel".
GNOME and KDE are Desktop Environments. GNOME primarily uses the GTK+ toolkit, while KDE primarily uses the Qt toolkit. There are applications designed for GNOME or KDE, such as a settings menu or a default music player, usually in the appropriate toolkit. These Desktop Environments have a set of utilities/window managers/design specification to create a more unified desktop. You can mix the two if you feel like it, but you may run into issues with colliding standards and applications (which is a bit more common on systems like Arch).
Unity uses many of the GNOME utilities and backends (Nautilus, Rhythmbox, gvfs, etc.), so Unity is more GNOME than KDE.
One A GNOME program uses multiple libraries to form a hierarchy:
The Gnome library is at the top level, including help routines, classes, and special widgets, and provides an infrastructure for your application.
The second layer is GTK, which is part of the GTK + library. This library provides a basic toolkit and widget to create GUI applications. Most GUIs are written directly with GTK. GTK also provides a powerful object system for the GNOME library.
The next layer is GDK, which is simply packaged with the X function library, which is only used when we make special drawings or set the special properties of the window.
The bottom layer is glib, a utility library for C, which includes portability and some utility functions, as well as some container classes, such as lists, variable groups, variable-length strings, hashes (seemingly Hassi), caching, an event loop, and other useful constructs
小结：
- GLib 是基础对象库，不涉及任何图形绘制。
- GDK 是图形绘制库，如果想定制化widget，则再此层实现。不太需要关心。
- GTK GTK+ 和 Qt 都是 GUI 库，同级别。设备事件管理和窗口管理都在在这一层。
- GNome 和 KDE 是对 GUI 库的二次封装。
一般开发触及到 GNome 和 GTK/GTK+ 即可。
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