mirror of https://github.com/espruino/BangleApps
120 lines
4.3 KiB
Markdown
120 lines
4.3 KiB
Markdown
# Matryoshka Keyboard
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Nested key input utility.
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## How to type
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Press your finger down on the letter group that contains the character you would like to type, then tap the letter you
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want to enter. Once you are touching the letter you want, release your
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finger.
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Press "shft" or "caps" to access alternative characters, including upper case letters, punctuation, and special
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characters.
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Pressing "shft" also reveals a cancel button if you would like to terminate input without saving.
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Press "ok" to finish typing and send your text to whatever app called this keyboard.
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Press "del" to delete the leftmost character.
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## Themes and Colors
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This keyboard will attempt to use whatever theme or colorscheme is being used by your Bangle device.
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## How to use in a program
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This was developed to match the interface implemented for kbtouch, kbswipe, etc.
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In your app's metadata, add:
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```json
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"dependencies": {"textinput": "type"}
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```
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From inside your app, call:
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```js
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const textInput = require("textinput");
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textInput.input({text: ""})
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.then(result => {
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console.log("The user entered: ", result);
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});
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```
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Alternatively, if you want to improve the load time of the keyboard, you can pre-generate the data the keyboard needs
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to function and render like so:
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```js
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const textInput = require("textinput");
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const defaultKeyboard = textInput.generateKeyboard(textInput.defaultCharSet);
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const defaultShiftKeyboard = textInput.generateKeyboard(textInput.defaultCharSetShift);
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// ...
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textInput.input({text: "", keyboardMain: defaultKeyboard, keyboardShift: defaultShiftKeyboard})
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.then(result => {
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console.log("The user entered: ", result);
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// And it was faster!
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});
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```
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This isn't required, but if you are using a large character set, and the user is interacting with the keyboard a lot,
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it can really smooth the experience.
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The default keyboard has a full set of alphanumeric characters as well as special characters and buttons in a
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pre-defined layout. If your application needs something different, or you want to have a custom layout, you can do so:
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```js
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const textInput = require("textinput");
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const customKeyboard = textInput.generateKeyboard([
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["1", "2", "3", "4"], ["5", "6", "7", "8"], ["9", "0", ".", "-"], "ok", "del", "cncl"
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]);
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// ...
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textInput.input({text: "", keyboardMain: customKeyboard})
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.then(result => {
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console.log("The user entered: ", result);
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// And they could only enter numbers, periods, and dashes!
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});
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```
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This will give you a keyboard with six buttons. The first three buttons will open up a 2x2 keyboard. The second three
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buttons are special keys for submitting, deleting, and cancelling respectively.
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Finally if you are like, super lazy, or have a dynamic set of keys you want to be using at any given time, you can
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generate keysets from strings like so:
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```js
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const textInput = require("textinput");
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const customKeyboard = textInput.generateKeyboard(createCharSet("ABCDEFGHIJKLMNOP", ["ok", "shft", "cncl"]));
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const customShiftKeyboard = textInput.generateKeyboard(createCharSet("abcdefghijklmnop", ["ok", "shft", "cncl"]));
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// ...
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textInput.input({text: "", keyboardMain: customKeyboard, keyboardShift: customShiftKeyboard})
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.then(result => {
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console.log("The user entered: ", result);
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// And the keyboard was automatically generated to include "ABCDEFGHIJKLMNOP" plus an OK button, a shift button, and a cancel button!
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});
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```
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The promise resolves when the user hits "ok" on the input or if they cancel. If the user cancels, undefined is
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returned, although the user can hit "OK" with an empty string as well. If you define a custom character set and
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do not include the "ok" button your user will be soft-locked by the keyboard. Fair warning!
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At some point I may add swipe-for-space and swipe-for-delete as well as swipe-for-submit and swipe-for-cancel
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however I want to have a good strategy for the touch screen
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[affordance](https://careerfoundry.com/en/blog/ux-design/affordances-ux-design/).
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## Secret features
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If you long press a key with characters on it, that will enable "Shift" mode.
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