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docs: Progress bar in taskbar

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Cheng Zhao 2014-11-18 10:54:08 +08:00
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docs/tutorial/desktop-environment-integration.md
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@ -143,8 +143,34 @@ __Launcher shortcuts of Audacious:__
![audacious](https://help.ubuntu.com/community/UnityLaunchersAndDesktopFiles?action=AttachFile&do=get&target=shortcuts.png)
## Progress bar in taskbar (Windows & Unity)
On Windows, a taskbar button can be used to display a progress bar. This enables
a window to provide progress information to the user without that user having to
switch to the window itself.
The Unity DE also has a simililar feature that allows you to specify progress
bar in the lancher.
__Progress bar in taskbar button:__
![Taskbar Progress Bar](https://cloud.githubusercontent.com/assets/639601/5081682/16691fda-6f0e-11e4-9676-49b6418f1264.png)
__Progress bar in Unity launcher:__
![Unity Launcher](https://cloud.githubusercontent.com/assets/639601/5081747/4a0a589e-6f0f-11e4-803f-91594716a546.png)
To set the progress bar for a Window, you can use the
[BrowserWindow.setProgressBar](setprogressbar) API:
```javascript
var window = new BrowserWindow({...});
window.setProgresssBar(0.5);
```
[addrecentdocument]:../api/app.md#appaddrecentdocumentpath
[clearrecentdocuments]:../api/app.md#appclearrecentdocuments
[setusertaskstasks]:../api/app.md#appsetusertaskstasks
[setprogressbar]:../api/browser-window.md#browserwindowsetprogressbarprogress
[app-registration]:http://msdn.microsoft.com/en-us/library/windows/desktop/ee872121(v=vs.85).aspx
[unity-launcher]:https://help.ubuntu.com/community/UnityLaunchersAndDesktopFiles#Adding_shortcuts_to_a_launcher