An on screen keyboard for UWP apps on Windows IoT

The control is based on the DigitalSignage UWP app from the UWP samples (https://ms-iot.github.io/content/en-US/win10/samples/DigitalSignage.htm).

• input injects directly into target TextBox/PasswordBox instead of OutputString property
• the Content property of the [ key was fixed
• spacing between keys subtituted with black margin to prevent unwanted unfocusing
• IsTabStop="False" on all keys causes focus to remain at the TextBox

• symbols for Tab, Capslock, Shift, Backspace, Return
• keyboard layout
  • Shift+SPACE can toggle the keyboard layout between German/English
  • InitialLayout property of the control to ... guess what.
  • KeyAssignmentSet.cs was restructured to allow for additional keyboard layouts
• IsEnabled property of all keys regulates activation/deactivation when a TextBox is focused/unfocused

<oks:OnScreenKeyBoard x:Name="keyboard" InitialLayout="German" Margin="20" />

Register all textboxes and password boxes with the keyboard. (The keyboard subscribes to GotFocus and LostFocus.)

// in your MainPage constructor 
keyboard.RegisterTarget(textBox1); 
keyboard.RegisterTarget(textBox2); 
keyboard.RegisterTarget(passwordBox1);

This is what it looks like: