Code Quality Rank: L3
Programming language: C#
License: GNU General Public License v3.0 or later
Tags: Metro     WinRT     XAML     Win8     Flyout     Settings     Popup     Menu     Win8.1     Pivot     Ratings     Flipview     Watermark    
Latest version: v1.4.0

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What Is It?

Callisto is a library for use in Windows Store XAML applications (aka Metro style apps). The XAML framework in Windows.UI.Xaml is great, but has some functionality that isn't provided in-the-box in a few controls and APIs. Callisto provides added functionality on top of the XAML UI framework for Windows.

You can also read more under Frequently Asked Questions. Documentation for each control is always an 'in progress' thing ([contributions welcome](contributing.md)) but is on the Wiki page here.

What's In It?

So far Callisto includes:

  • Rating - a ratings control for Metro UI
  • LiveTile - an in-app tile experience to give you animated or 'live' tiles
  • Tilt - an effect to provide the tilt experience when clicked on edges/corners
  • OAuth helpers - a set of helpers to create OAuth 1.0 signatures/headers for those sites that hate OAuth 2.0 :-)
  • BooleanToVisibilityConverter - a converter to well, convert boolean to visibility, very common use
  • LengthToBooleanConverter - a converter to examine a string length to convert to boolean (simple validation helper)
  • RelativeTimeConverter - a converter to show time as relative string, i.e., 'about an hour ago'
  • Extensions - some extension method helpers (i.e., bind html content to a WebView)

What is in the plan (could always use the help):

  • DatePicker and TimePicker - providing a globalized time/date picker control in Metro style
  • Ratings - providing a rating control for Metro style
  • Pivot - a UI interface for providing "tabbed" interface in a Metro style way

Note the following have been deprecated in the most recent release as Windows 8.1 introduces proper controls for these:

  • Flyout - a primitive that includes positioning and 'light dismiss' logic
  • Menu - primarily to be used from AppBar, contains the base for providing, well, a Menu
  • MenuItem - an item for a menu, including separators and contains the command point for the menu item
  • SettingsFlyout - an item to create a custom settings pane UI

How To Install It?

There are two ways you can install the control.

Visual Studio Extension SDK

Install as an Extension SDK via the Visual Studio Gallery - available within VS as well as downloading from the gallery directly


You can get the control via NuGet if you have the extension installed for Visual Studio or via the PowerShell package manager. This control is published via NuGet at Callisto.

How To Use It?

Controls are individually documented with examples for usage on the Wiki Documentation.

I found an Issue

Great, please log a bug so that it can be tracked.

Credits and Acknowledgements

Open Source Project Credits

Some of the code represented in the toolkit is forks/ports of other Open Source libraries. Where used, their license is reprsented in the code files.

  • Silverlight Toolkit - for providing the base of many ported concepts/code. Licensed under Ms-PL
  • RestSharp - the OAuth helper file is a fork from the RestSharp project which uses this internally for some authenticators. Licensed under Apache 2.0

*Note that all licence references and agreements mentioned in the Callisto README section above are relevant to that project's source code only.