Skip to content
Find file
Fetching contributors…
Cannot retrieve contributors at this time
116 lines (77 sloc) 5.52 KB


What Is It?

Callisto is a library for use in Windows 8 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.

What's In It?

So far Callisto includes:

  • 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
  • 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

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?

To use the controls you simply create an instance of them (we will use an example here) like Flyout and tell it what content goes in it and where it should go:

using Callisto.Controls;

Flyout f = new Flyout();

// Flyout is a ContentControl so set your content within it.
f.Content = new Border() { Width=500, Height=500 };

f.Placement = PlacementMode.Top;
f.PlacementTarget = MyButton; // this is an UI element (usually the sender)

f.IsOpen = true;

You can also use the Menu as content:

using Callisto.Controls;

Flyout f = new Flyout();

f.Placement = PlacementMode.Top;
f.PlacementTarget = MyButton; // this is an UI element (usually the sender)

Menu m = new Menu();

MenuItem mi1 = new MenuItem();
mi1.Text = "Some Option";

MenuItem mi2 = new MenuItem();
mi2.Text = "Another Option Here";

m.Items.Add(new MenuItemSeparator());

f.Content = m;

f.IsOpen = true;

This creates a menu flyout for command from an AppBar control for example.

Using with content that gathers input

If you are using the Flyout with a UserControl that perhaps would gather input, you need to take account the fact that the input host manager (IHM) or 'soft keyboard' will show up in touch situations. An un-parented Flyout control will not automatically scroll into view when the soft keyboard shows up. This means that if you have input on the bottom AppBar as an example, your input would be hidden because the soft keyboard will likely cover it.

This is solvable by adding the Flyout to the view. You must now, however, manage the removal of it so you don't get a leak. Here is a pseudo example

using Callisto.Controls;

Flyout f = new Flyout();

// other stuff here

LayoutRoot.Children.Add(f.HostPopup); // add this to some existing control in your view like the root visual

// remove the parenting during the Closed event on the Flyout
f.Closed += (s,a) =>

This should prevent a leak of the object when it is dismissed.

Commands and Clicks

When using just the Flyout, you own the Content within it. When using the Menu and MenuItem you can attach an event to the Tapped event in MenuItem or also by providing a command that has implemented ICommand in your code.

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
Something went wrong with that request. Please try again.