In the X Window System, every window is contained within another window, called its parent. This makes the windows form a hierarchy. The root window is the root of this hierarchy. It is as large as the screen/display surface, and all other windows are either children or descendants of it.
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| - Root window (en)
- 根窗口 (zh)
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| - 在X窗口系统中，每一个視窗都包含在另一个窗口中，这个视窗对它来说称之为父窗口。这使视窗间形成了一个等级制度。根窗口在这个等级制度中的最顶级，它与屏幕一样大，其他所有窗口都是它的后代。 由于每一个窗口都覆盖了父窗口的一部分，所以其他窗口均在根窗口之上显示。因此，根窗口只能在其他窗口之后显示一部分。换一种说法，根窗口构成了屏幕的背景，通过一些方法（比如xsetroot或是程序）可以将一张图片设置作为電腦壁紙。 根窗口的直系后代被称为顶级窗口，这些窗口通常包含了装饰框架和一个标题栏（实际都是由窗口管理器添加）。顶级窗口一般是图形用户界面中的普通窗口，而非顶级窗口一般用于按钮、文本框等控件。 根窗口的属性有时会被作为客户端间通信的一种基本手段。举个例子，是根窗口用于复制一个窗口中选中的部分到另一个窗口的属性，DWM窗口管理器会将根窗口的名字显示在状态区，也会在执行时存储到根窗口的一个属性。 (zh)
- In the X Window System, every window is contained within another window, called its parent. This makes the windows form a hierarchy. The root window is the root of this hierarchy. It is as large as the screen/display surface, and all other windows are either children or descendants of it. (en)
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| - In the X Window System, every window is contained within another window, called its parent. This makes the windows form a hierarchy. The root window is the root of this hierarchy. It is as large as the screen/display surface, and all other windows are either children or descendants of it. Since every window covers the part of its parent it is staying on, all other windows appear to be above the root window. As a result, the root window is visible as the part of the screen that is behind all other windows. In other words, the root window forms the background of the screen. An image can be used as the wallpaper of the screen by setting it as the background image of the root window. This can be done for example using the xsetroot or the xv programs. The direct children of the root window are called top-level windows. These windows are usually drawn with a decorative frame and a title bar (which are actually added by the window manager). The top-level windows are, informally, the regular windows in the terminology of most GUIs. The windows that are not top-level are used for buttons, textboxes, etc. The properties of the root window are sometimes used as a rudimentary form of inter-client communication means. For example, the cut buffers are properties of the root window that are used for copying selected text from a window to another, and the dwm window manager displays the root window's name in a status area. The X resources are also stored, during execution, in a property of the root window. (en)
- 在X窗口系统中，每一个視窗都包含在另一个窗口中，这个视窗对它来说称之为父窗口。这使视窗间形成了一个等级制度。根窗口在这个等级制度中的最顶级，它与屏幕一样大，其他所有窗口都是它的后代。 由于每一个窗口都覆盖了父窗口的一部分，所以其他窗口均在根窗口之上显示。因此，根窗口只能在其他窗口之后显示一部分。换一种说法，根窗口构成了屏幕的背景，通过一些方法（比如xsetroot或是程序）可以将一张图片设置作为電腦壁紙。 根窗口的直系后代被称为顶级窗口，这些窗口通常包含了装饰框架和一个标题栏（实际都是由窗口管理器添加）。顶级窗口一般是图形用户界面中的普通窗口，而非顶级窗口一般用于按钮、文本框等控件。 根窗口的属性有时会被作为客户端间通信的一种基本手段。举个例子，是根窗口用于复制一个窗口中选中的部分到另一个窗口的属性，DWM窗口管理器会将根窗口的名字显示在状态区，也会在执行时存储到根窗口的一个属性。 (zh)
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