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- translating by Auk7F7
-How to set GNOME to display a custom slideshow
-======
-A very cool, yet lesser known, feature in GNOME is its ability to display a slideshow as your wallpaper. You can select a wallpaper slideshow from the background settings panel in the [GNOME Control Center][1]. Wallpaper slideshows can be distinguished from static wallpapers by a small clock emblem displayed in the lower-right corner of the preview.
-
-Some distributions come with pre-installed slideshow wallpapers. For example, Ubuntu includes the stock GNOME timed wallpaper slideshow, as well as one of Ubuntu wallpaper contest winners.
-
-What if you want to create your own custom slideshow to use as a wallpaper? While GNOME doesn't provide a user interface for this, it's quite simple to create one using some simple XML files in your home directory. Fortunately, the background selection in the GNOME Control Center honors some common directory paths, which makes it easy to create a slideshow without having to edit anything provided by your distribution.
-
-### Getting started
-
-Using your favorite text editor, create an XML file in `$HOME/.local/share/gnome-background-properties/`. Although the filename isn't important, the directory name matters (and you'll probably have to create the directory). For my example, I created `/home/ken/.local/share/gnome-background-properties/osdc-wallpapers.xml `with the following content:
-```
-
-
-
-
- Opensource.com Wallpapers
- /home/ken/Pictures/Wallpapers/osdc/osdc.xml
- zoom
-
-
-```
-
-The above XML file needs a `` stanza for each slideshow or static wallpaper you want to include in the `backgrounds` panel of the GNOME Control Center.
-
-In this example, my `osdc.xml` file looks like this:
-
-```
-
-
-
-
- 30.0
- /home/ken/Pictures/Wallpapers/osdc/osdc_2.png
-
-
-
- 0.5
- /home/ken/Pictures/Wallpapers/osdc/osdc_2.png
- /home/ken/Pictures/Wallpapers/osdc/osdc_1.png
-
-
- 30.0
- /home/ken/Pictures/Wallpapers/osdc/osdc_1.png
-
-
- 0.5
- /home/ken/Pictures/Wallpapers/osdc/osdc_1.png
- /home/ken/Pictures/Wallpapers/osdc/osdc_2.png
-
-
-```
-
-There are a few important pieces in the above XML. The `` node in the XML is your outer node. Each background supports multiple `` and `` nodes.
-
-The `` node defines an image to be displayed and the duration to display it with `` and `` nodes, respectively.
-
-The `` node defines the ``, the `` image, and the `` image for each transition.
-
-### Changing wallpaper throughout the day
-
-Another cool GNOME feature is time-based slideshows. You can define the start time for the slideshow and GNOME will calculate times based on it. This is useful for setting different wallpapers based on the time of day. For example, you could set the start time to 06:00 and display one wallpaper until 12:00, then change it for the afternoon, and again at 18:00.
-
-This is accomplished by defining the `` in your XML like this:
-```
-
-
- 2017
- 11
- 21
- 6
- 00
- 00
-
-```
-
-The above XML started the animation at 06:00 on November 21, 2017, with a duration of 21,600.00, equal to six hours. This displays your morning wallpaper until 12:00, at which time it changes to your next wallpaper. You can continue in this manner to change the wallpaper at any intervals you'd like throughout the day, but ensure the total of all your durations is 86,400 seconds (equal to 24 hours).
-
-GNOME will calculate the delta between the start time and the current time and display the correct wallpaper for the current time. For example, if you select your new wallpaper at 16:00, GNOME will display the proper wallpaper for 36,000 seconds past the start time of 06:00.
-
-For a complete example, see the adwaita-timed slideshow provided by the gnome-backgrounds package in most distributions. It's usually found in `/usr/share/backgrounds/gnome/adwaita-timed.xml`.
-
-### For more information
-
-Hopefully this encourages you to take a dive into creating your own slideshow wallpapers. If you would like to download complete versions of the files referenced in this article, they can be found on [GitHub][2].
-
-If you're interested in utility scripts for generating the XML files, you can do an internet search for gnome-background-generator.
-
---------------------------------------------------------------------------------
-
-via: https://opensource.com/article/17/12/create-your-own-wallpaper-slideshow-gnome
-
-作者:[Ken Vandine][a]
-译者:[译者ID](https://github.com/译者ID)
-校对:[校对者ID](https://github.com/校对者ID)
-
-本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译,[Linux中国](https://linux.cn/) 荣誉推出
-
-[a]:https://opensource.com/users/kenvandine
-[1]:http://manpages.ubuntu.com/manpages/xenial/man1/gnome-control-center.1.html
-[2]:https://github.com/kenvandine/misc/tree/master/articles/osdc/gnome/slide-show-backgrounds/osdc
diff --git a/translated/tech/20171219 How to set GNOME to display a custom slideshow.md b/translated/tech/20171219 How to set GNOME to display a custom slideshow.md
new file mode 100644
index 0000000000..e345a48d39
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+++ b/translated/tech/20171219 How to set GNOME to display a custom slideshow.md
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+
+如何设置 GNOME 显示自定义幻灯片
+======
+在 GNOME 中, 一个非常酷, 但却鲜为人知的特性是它能够将幻灯片显示为墙纸。你可以从 [GNOME 控制中心][1]的 "背景设置" 面板中选择墙纸幻灯片。在预览的右下角显示一个小时钟标志, 可以将幻灯片的墙纸与静态墙纸区别开来。
+
+一些发行版带有预装的幻灯片壁纸。 例如, Ubuntu 包含了库存的 GNOME 定时壁纸幻灯片, 以及 Ubuntu 壁纸大赛优胜者之一。
+
+如果你想创建自己的自定义幻灯片用作壁纸怎么办? 虽然 GNOME 没有为此提供一个用户界面, 但是在你的主目录中使用一些简单的 XML 文件来创建一个是非常容易的。 幸运的是, GNOME 控制中心的背景选择支持一些常见的目录路径,这样就可以轻松创建幻灯片, 而不必编辑分发所提供的任何内容。
+
+### 开始
+
+使用你最喜欢的文本编辑器在 `$HOME/.local/share/gnome-background-properties/` 创建一个 XML 文件。 虽然文件名不重要, 但目录名称很重要(你可能需要创建目录)。 举个例子, 我创建了带有以下内容的 `/home/ken/.local/share/gnome-background-properties/osdc-wallpapers.xml `:
+
+```
+
+
+
+
+ Opensource.com Wallpapers
+ /home/ken/Pictures/Wallpapers/osdc/osdc.xml
+ zoom
+
+
+```
+上面的 XML 文件需要为每个幻灯片或静态壁纸设计一 `` 节点, 你需要将它们包含在 GNOME 控制中心的 `背景面板`中。
+
+在这个例子中, 我的 `osdc.xml` 文件看起来是这样的:
+
+
+```
+
+
+
+
+ 30.0
+ /home/ken/Pictures/Wallpapers/osdc/osdc_2.png
+
+
+
+ 0.5
+ /home/ken/Pictures/Wallpapers/osdc/osdc_2.png
+ /home/ken/Pictures/Wallpapers/osdc/osdc_1.png
+
+
+ 30.0
+ /home/ken/Pictures/Wallpapers/osdc/osdc_1.png
+
+
+ 0.5
+ /home/ken/Pictures/Wallpapers/osdc/osdc_1.png
+ /home/ken/Pictures/Wallpapers/osdc/osdc_2.png
+
+
+```
+上面的XML中有几个重要的部分。 XML中的 `` 节点是你的外部节点。 每个背景都支持多个 `` 和 `` 节点。
+
+`` 节点定义要显示的图像以及分别用 `` 和 `` 节点显示它的持续时间。
+
+`` 节点为每个转换定义`` ,`` 图像和 `` 图像。
+
+### 全天更换壁纸
+
+另一个很酷的GNOME功能是基于时间的幻灯片。 你可以定义幻灯片的开始时间,GNOME将根据它计算时间。 这对于根据一天中的时间设置不同的壁纸很有用。 例如,你可以将开始时间设置为06:00,并在12:00之前显示一张墙纸,然后在下午和18:00再次更改。
+
+这是通过在XML中定义 `` 来完成的,如下所示:
+
+```
+
+
+ 2017
+ 11
+ 21
+ 6
+ 00
+ 00
+
+```
+
+上述XML文件于2017年11月21日06:00开始动画,时长为21,600.00,相当于六个小时。 这段时间将显示你的早晨壁纸直到12:00,12:00时它会更改为你的下一张壁纸。 你可以继续以这种方式每隔一段时间更换一次壁纸,但确保所有持续时间的总计为86,400秒(等于24小时)。
+
+GNOME将计算开始时间和当前时间之间的增量,并显示当前时间的正确墙纸。 例如,如果你在16:00选择新壁纸,则GNOME将在06:00开始时间之后显示36,000秒的适当壁纸。
+
+有关完整示例,请参阅大多数发行版中由gnome-backgrounds包提供的adwaita-timed幻灯片。 它通常位于 `/usr/share/backgrounds/gnome/adwaita-timed.xml` 中。
+
+
+### 了解更多信息
+
+希望这可以鼓励你深入了解创建自己的幻灯片壁纸。 如果你想下载本文中引用的文件的完整版本,那么你可以在 [GitHub][2] 上找到它们。
+
+如果你对用于生成XML文件的实用程序脚本感兴趣,你可以在互联网上搜索gnome- backearth -generator。
+
+--------------------------------------------------------------------------------
+
+via: https://opensource.com/article/17/12/create-your-own-wallpaper-slideshow-gnome
+
+作者:[Ken Vandine][a]
+译者:[Auk7F7](https://github.com/Auk7F7)
+校对:[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译,[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]:https://opensource.com/users/kenvandine
+[1]:http://manpages.ubuntu.com/manpages/xenial/man1/gnome-control-center.1.html
+[2]:https://github.com/kenvandine/misc/tree/master/articles/osdc/gnome/slide-show-backgrounds/osdc
+