chore: convert and update: developer/16.0/guides/develop/touch/making-touch-keyboard

developer/16.0/guides/develop/touch-keyboard-tutorial/index.md

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+---
+title: Creating a Simple Touch keyboard
+---
+
+## Introduction and design
+
+If you have experience in designing Keyman keyboards for computers, the
+interface for designing mobile keyboards looks very similar, but it
+hides the reality of additional steps necessary for mobile keyboards.
+This tutorial attempts to walk you through the process.
+
+The [Quick French tutorial](../tutorial/) shows how to create a simple
+desktop keyboard for typing accented characters used in French and other
+European languages. It is possible to create a touch screen format of
+that keyboard, but it is probably unnecessary. The default keyboards for
+both Android and iOS devices have a way to type these accented
+characters. Press and hold on a vowel, and a popup menu will give you a
+choice of accents to put on that letter.
+
+For this tutorial we will demonstrate something usable for the Fulfulde
+language cluster spoken across many Sahelian countries of Africa.
+Fulfulde is usually written using the Latin alphabet, but there are a
+few characters added to the usual list of alphabetical characters. So
+this is a useful example for any language wanting to add a few
+characters to the standard Latin keyboard. Here are the characters we
+are going to add, together with their Unicode values.
+
+|             |          |     |          |     |     |          |     |          |
+|-------------|----------|-----|----------|-----|-----|----------|-----|----------|
+| `        ɓ` | `U+0253` | `Ɓ` | `U+0181` |     | `ɗ` | `U+0257` | `Ɗ` | `U+018A` |
+| `        ŋ` | `U+014B` | `Ŋ` | `U+014A` |     | `ƴ` | `U+01B4` | `Ƴ` | `U+01B3` |
+
+Here we will likely want to proceed differently than with the desktop
+keyboard. The usual approach for a desktop keyboard is to create a
+deadkey. The keyboards I have used for Fulfulde (going back to decades
+ago) used the ```/``` key as the deadkey.
+***`/`*** ***`b`*** gave ɓ,
+***`/`*** ***`d`*** gave ɗ, and so on.
+
+It would be possible to use that desktop keyboard logic on touch
+screens.  But your mobile device users will find these rules annoying.
+Instead of two keys they would probably have to press four, since the
+standard alphabetical keyboard on most touch devices does not have the
+slash key. So they would have to press the key to switch to the numeric
+keyboard, then press slash, then press the key to go back to the
+alphabetical keyboard, then the letter. What touch screen users would
+appreciate is something that uses the great feature of touch screens,
+the long press or press and hold on a letter, to see analogous letters.
+So we’ll set up a touch screen keyboard that lets you press and hold ‘d’
+to see the two hooked d characters, press and hold ‘b’ to see the hooked
+b characters, and so on.
+
+[Next: Making, testing and distributing the touch
+keyboard](making-touch-keyboard)