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Clay

Clay is a JavaScript library that makes it easy to add offline configuration pages to your Pebble apps. All you need to get started is a couple lines of JavaScript and a JSON file; no servers or HTML required.

Clay will by default automatically handle the 'showConfiguration' and 'webviewclosed' events traditionally implemented by developers to relay configuration settings to the watch side of the app. This step is not required when using Clay, since each config item is given the same messageKey as defined in package.json (or PebbleKit JS Message Keys on CloudPebble), and is automatically transmitted once the configuration page is submitted by the user. Developers can override this behavior by handling the events manually.

Clay is distributed as a Pebble package so it is super easy to include in your project. If you are upgrading from v0.1.x of Clay you need to follow the migration guide before you can get started.

If you would like to contribute to Clay, check out the contributing guide.

Getting Started (SDK 3.13 or higher)

  1. Run pebble package install pebble-clay to install the package in your project
  2. Create a JSON file called config.json and place it in your src/js directory.
  3. In order for JSON files to work you may need to change a line in your wscript from ctx.pbl_bundle(binaries=binaries, js=ctx.path.ant_glob('src/js/**/*.js')) to ctx.pbl_bundle(binaries=binaries, js=ctx.path.ant_glob(['src/js/**/*.js', 'src/js/**/*.json'])).
  4. Your index.js (app.js in SDK 3) file needs to require clay and your config file, then be initialized. Clay will by default automatically handle the 'showConfiguration' and 'webviewclosed' events. Copy and paste the following into the top of your index.js file:
var Clay = require('pebble-clay');
var clayConfig = require('./config.json');
var clay = new Clay(clayConfig);
  1. Ensure pebble.enableMultiJS is set to true in your package.json.
  2. Next is the fun part - creating your config page. Edit your config.json file to build a layout of elements as described in the sections below.
  3. Make sure you have defined all of your messageKeys in your package.json. More info on how that works here.

Getting Started (CloudPebble)

  1. Ensure JS Handling is set to CommonJS-style in your project settings.
  2. Under Dependencies in the project navigation, enter pebble-clay as the Package Name and ^1.0.0 for the Version. You may use any specific version you like, however using ^1.0.0 will ensure you receive all minor version updates.
  3. Create a JavaScript file called config.js with the following content. This will act as your config's root array element, from which the rest of the page is built up:
module.exports = [];
  1. Your index.js file needs to require clay and your config file, then be initialized. Clay will by default automatically handle the 'showConfiguration' and 'webviewclosed' events. Copy and paste the following into the top of your app.js file:
var Clay = require('pebble-clay');
var clayConfig = require('./config');
var clay = new Clay(clayConfig);
  1. Next is the fun part - creating your config page. Edit your config.js file to build a layout of elements as described in the sections below.
  2. Make sure you have defined all of your message keys using Automatic assignment in your project settings. More info on how that works here.

Getting Started (Pebble.js)

If you are using Pebble.js and would like to use Clay, The setup process is a little different. Pebble.js does not currently support message keys so you will have to use v0.1.7 of Clay. Follow the instructions in the readme for that version.

Getting Started (Rocky.js)

If you are using Rocky.js and would like to use Clay, please be aware that this is currently unsupported. It is possible to install the Clay package and override the 'showConfiguration' and 'webviewclosed' events and handle them manually, but Rocky.js does not currently support persistent storage, so the settings must be loaded from the phone each time. You can find an example of using Clay with Rocky.js here.

Creating Your Config File

Clay uses JavaScript object notation (or JSON) to generate the config page for you. The structure of the page is up to you, but you do need to follow some basic rules.

Basic Config Structure

Your root element must be an array. This represents the entire page. Inside this array you place your config items. Each config item is an object with some properties that configure how each item should be displayed.

Example

NOTE for config.js (rather than config.json) a leading module.exports = is required.

[
  { 
    "type": "heading", 
    "defaultValue": "Example Header Item" 
  }, 
  { 
    "type": "text", 
    "defaultValue": "Example text item." 
  }
]

Components

Section

Sections help divide up the page into logical groups of items. It is recommended that you place all your input-based items in at least one section.

Properties
Property Type Description
type string Set to section.
items array Array of items to include in this section.
capabilities array Array of features that the connected watch must have for this section to be present
Example
{
  "type": "section",
  "items": [
    {
      "type": "heading",
      "defaultValue": "This is a section"
    },
    {
      "type": "input",
      "messageKey": "email",
      "label": "Email Address"
    },
    {
      "type": "toggle",
      "messageKey": "enableAnimations",
      "label": "Enable Animations"
    }
  ]
}

Heading

Manipulator: html

Headings can be used in anywhere and can have their size adjusted to suit the context. If you place a heading item at the first position of a section's items array then it will automatically be styled as the header for that section.

Properties
Property Type Description
type string Set to heading.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
messageKey string (unique) The AppMessage key matching the messageKey item defined in your package.json. Set this to a unique string to allow this item to be looked up using Clay.getItemsByMessageKey() in your custom function. You must set this if you wish for the value of this item to be persisted after the user closes the config page.
defaultValue string/HTML The heading's text.
size int Defaults to 4. An integer from 1 to 6 where 1 is the largest size and 6 is the smallest. (represents HTML <h1>, <h2>, <h3>, etc).
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "heading",
  "id": "main-heading",
  "defaultValue": "My Cool Watchface",
  "size": 1
}

Text

Manipulator: html

Text is used to provide descriptions of sections or to explain complex parts of your page. Feel free to add any extra HTML you require to the defaultValue

Properties
Property Type Description
type string Set to text.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
messageKey string (unique) The AppMessage key matching the messageKey item defined in your package.json. Set this to a unique string to allow this item to be looked up using Clay.getItemsByMessageKey() in your custom function. You must set this if you wish for the value of this item to be persisted after the user closes the config page.
defaultValue string/HTML The content of the text element.
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "text",
  "defaultValue": "This will be displayed in the text element!",
}

Input

Manipulator: val

Standard text input field.

Properties
Property Type Description
type string Set to input.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
messageKey string (unique) The AppMessage key matching the messageKey item defined in your package.json. Set this to a unique string to allow this item to be looked up using Clay.getItemsByMessageKey() in your custom function. You must set this if you wish for the value of this item to be persisted after the user closes the config page.
label string The label that should appear next to this item.
defaultValue string The default value of the input field.
description string Optional sub-text to include below the component
attributes object An object containing HTML attributes to set on the input field. Set type to values such as "email", "time", "date" etc to adjust the behavior of the component.
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "input",
  "messageKey": "email",
  "defaultValue": "",
  "label": "Email Address",
  "attributes": {
    "placeholder": "eg: name@domain.com",
    "limit": 10,
    "type": "email"
  }
}

Toggle

Manipulator: checked

Switch for a single item.

Properties
Property Type Description
type string Set to toggle.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
messageKey string (unique) The AppMessage key matching the messageKey item defined in your package.json. Set this to a unique string to allow this item to be looked up using Clay.getItemsByMessageKey() in your custom function. You must set this if you wish for the value of this item to be persisted after the user closes the config page.
label string The label that should appear next to this item.
defaultValue int|boolean The default value of the toggle. Defaults to false if not specified.
description string Optional sub-text to include below the component
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "toggle",
  "messageKey": "invert",
  "label": "Invert Colors",
  "defaultValue": true
}

Select

Manipulator: val

A dropdown menu containing multiple options.

Properties
Property Type Description
type string Set to select.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
messageKey string (unique) The AppMessage key matching the messageKey item defined in your package.json. Set this to a unique string to allow this item to be looked up using Clay.getItemsByMessageKey() in your custom function. You must set this if you wish for the value of this item to be persisted after the user closes the config page.
label string The label that should appear next to this item.
defaultValue string The default value of the dropdown menu. Must match a value in the options array.
description string Optional sub-text to include below the component
options array of objects The options you want to appear in the dropdown menu. Each option is an object with a label and value property.
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "select",
  "messageKey": "flavor",
  "defaultValue": "grape",
  "label": "Favorite Flavor",
  "options": [
    { 
      "label": "", 
      "value": "" 
    },
    { 
      "label": "Berry",
      "value": "berry" 
    },
    { 
      "label": "Grape",
      "value": "grape" 
    },
    { 
      "label": "Banana",
      "value": "banana" 
    }
  ]
}

If you wish to use optgroups, then use the following format:

{
  "type": "select",
  "messageKey": "flavor",
  "defaultValue": "grape",
  "label": "Favorite Flavor",
  "options": [
    { 
      "label": "", 
      "value": "" 
    },
    {
      "label": "Fruits",
      "value": [
        { 
          "label": "Berry",
          "value": "berry" 
        },
        { 
          "label": "Grape",
          "value": "grape" 
        },
        { 
          "label": "Banana",
          "value": "banana" 
        }
      ]
    }, 
    {
      "label": "Candy",
      "value": [
        { 
          "label": "Chocolate",
          "value": "chocolate" 
        },
        { 
          "label": "Cream",
          "value": "cream" 
        },
        { 
          "label": "Lollipop",
          "value": "lollipop" 
        }
      ]
    }
  ]
}

Color Picker

Manipulator: color

A color picker that allows users to choose a color from the ones that are compatible with their Pebble smartwatch. The color picker will automatically show a different layout depending on the watch connected:

  • Aplite (Firmware 2.x) - Black and white
  • Aplite (Firmware 3.x) - Black and white. Will also include gray (#AAAAAA) if allowGray is set to true
  • Basalt/chalk - The 64 colors compatible with color Pebble smartwatches.
Properties
Property Type Description
type string Set to color.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
messageKey string (unique) The AppMessage key matching the messageKey item defined in your package.json. Set this to a unique string to allow this item to be looked up using Clay.getItemsByMessageKey() in your custom function. You must set this if you wish for the value of this item to be persisted after the user closes the config page.
label string The label that should appear next to this item.
defaultValue string OR int The default color. One of the 64 colors compatible with Pebble smartwatches. Always use the uncorrected value even if sunlight is true. The component will do the conversion internally.
description string Optional sub-text to include below the component
sunlight boolean Use the color-corrected sunlight color palette if true, else the uncorrected version. Defaults to true if not specified.
layout string OR array Optional. Use a custom layout for the color picker. Defaults to automatically choosing the most appropriate layout for the connected watch. The layout is represented by a two dimensional array. Use false to insert blank spaces. You may also use one of the preset layouts by setting layout to: "COLOR", "GRAY" or "BLACK_WHITE"
allowGray boolean Optional. Set this to true to include gray (#AAAAAA) in the color picker for aplite running on firmware 3 and above. This is optional because only a subset of the drawing operations support gray on aplite. Defaults to false
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "color",
  "messageKey": "background",
  "defaultValue": "ff0000",
  "label": "Background Color",
  "sunlight": true,
  "layout": [
    [false, "00aaff", false],
    ["0055ff", "0000ff", "0000aa"],
    [false, "5555ff", false]
  ]
}
Example
{
  "type": "color",
  "messageKey": "background",
  "defaultValue": "ffffff",
  "label": "Background Color",
  "sunlight": false,
  "layout": "BLACK_WHITE"
}
Example
{
  "type": "color",
  "messageKey": "background",
  "defaultValue": "aaaaaa",
  "label": "Background Color",
  "sunlight": false,
  "allowGray": true
}

Radio Group

Manipulator: radiogroup

A list of options allowing the user can only choose one option to submit.

Properties
Property Type Description
type string Set to radiogroup.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
messageKey string (unique) The AppMessage key matching the messageKey item defined in your package.json. Set this to a unique string to allow this item to be looked up using Clay.getItemsByMessageKey() in your custom function. You must set this if you wish for the value of this item to be persisted after the user closes the config page.
label string The label that should appear next to this item.
defaultValue string The default selected item. Must match a value in the options array.
description string Optional sub-text to include below the component
options array of objects The options you want to appear in the radio group. Each option is an object with a label and value property.
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "radiogroup",
  "messageKey": "favorite_food",
  "label": "Favorite Food",
  "options": [
    { 
      "label": "Sushi", 
      "value": "sushi" 
    },
    { 
      "label": "Pizza", 
      "value": "pizza" 
    },
    { 
      "label": "Burgers", 
      "value": "burgers" 
    }
  ]
}

Checkbox Group

Manipulator: checkboxgroup

A list of options where a user may choose more than one option to submit.

Properties
Property Type Description
type string Set to checkboxgroup.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
messageKey string (unique) The AppMessage key matching the messageKey item defined in your package.json. Set this to a unique string to allow this item to be looked up using Clay.getItemsByMessageKey() in your custom function. You must set this if you wish for the value of this item to be persisted after the user closes the config page. NOTE: The checkboxgroup component will expect you to have defined a messageKey in your package.json using array syntax. In the example below, the matching entry in the package.json would be favorite_food[3]. In CloudPebble, you must use Automatic assignment for message keys and the Key Array Length must match the number of options in the checkboxgroup
label string The label that should appear next to this item.
defaultValue array of booleans The default selected items.
description string Optional sub-text to include below the component
options array of strings The labels for each checkbox you want to appear in the checkbox group.
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "checkboxgroup",
  "messageKey": "favorite_food",
  "label": "Favorite Food",
  "defaultValue": [true, false, true],
  "options": ["Sushi", "Pizza", "Burgers"]
}

In the above example, Sushi and Burgers will be selected by default.

Generic Button

Manipulator: button

Properties
Property Type Description
type string Set to button.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
defaultValue string The text displayed on the button.
primary boolean If true the button will be orange, if false, the button will be gray (defaults to false)
description string Optional sub-text to include below the component
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "button",
  "primary": true,
  "defaultValue": "Send"
}

Range Slider

Manipulator: slider

The range slider is used to allow users to select numbers between two values.

NOTE If you set the step property to anything less than 1, it will multiply the final value sent to the watch by 10 to the power of the number of decimal places in the value of step. Eg: If you set the step to 0.25 and the slider has value of 34.5, the watch will receive 3450. The reason why this is necessary, is because you can not send floats to the watch via Pebble.sendAppMessage(). This allows your users to still be able to input values that have decimals, you must just remember to divide the received value on the watch accordingly.

Properties
Property Type Description
type string Set to slider.
defaultValue number The value of the slider.
label string The label that should appear next to this item.
min number The minimum allowed value of the slider. Defaults to 100
max number The maximum allowed value of the slider. Defaults to 0
step number The multiple of the values allowed to be set on the slider. The slider will snap to these values. This value also determines the precision used when the value is sent to the watch. Defaults to 1
description string Optional sub-text to include below the component
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "slider",
  "messageKey": "slider",
  "defaultValue": 15,
  "label": "Slider",
  "description": "This is the description for the slider",
  "min": 10,
  "max": 20,
  "step": 0.25
},

Submit

Manipulator: button

The submit button for the page. You MUST include this component somewhere in the config page (traditionally at the bottom) or users will not be able to save the form.

Properties
Property Type Description
type string Set to submit.
defaultValue string The text displayed on the button.
id string (unique) Set this to a unique string to allow this item to be looked up using Clay.getItemById() in your custom function.
capabilities array Array of features that the connected watch must have for this item to be present
group string  Set this to allow this item, along with other items sharing the same group to be looked up using Clay.getItemsByGroup() in your custom function
Example
{
  "type": "submit",
  "defaultValue": "Save"
}

Message keys and array syntax

Clay supports (and requires in some cases) the use of array syntax for message keys. Also known as Automatic assignment in CloudPebble. More info here.

You can assign any component that does not return an array to a particular position in your message key. This is done by appending the position (zero indexed) wrapped in brackets to the end of the messageKey property. Do NOT include any spaces in your messageKey.

Example
{
  "type": "toggle",
  "messageKey": "light_switch[1]",
  "label": "Invert Colors",
  "defaultValue": true
}

In the above example, the value of the item will be accessible with MESSAGE_KEY_light_switch + 1 in your C code.

Components that return an array in their .get() method, such as the checkboxgroup will expect the corresponding message key to already be defined with the correct length. You CAN NOT use the array syntax in the messageKey property as this would be trying to create a 2 dimensional array.

Example
{
  "type": "checkboxgroup",
  "messageKey": "favorite_food",
  "label": "Favorite Food",
  "defaultValue": [true, false, true],
  "options": ["Sushi", "Pizza", "Burgers"]
}

In the above example, the value of the item will be accessible with MESSAGE_KEY_favorite_food, MESSAGE_KEY_favorite_food + 1, and MESSAGE_KEY_favorite_food + 2 in your C code.

Showing items for specific platforms and features

If you want particular items or sections to only be present in the config based on the connected watch's capabilities, you can include the "capabilities" property in the item. The "capabilities" property is an array of features that the connected watch must have in order for the item or section to be included in the page. Note: all capabilities in the array must be present for item/section to be included.

You can also prefix the capability with NOT_ to negate the capability. Eg: NOT_HEALTH will only be included in the page if the device does NOT support health.

Warning: Items that do not satisfy the capabilities will not be included in the page at all. You will not be able to use methods like clayConfig.getItemByMessageKey() to obtain a reference to them. However, this does mean that you will be able to have multiple items with the same messageKeyas long as they do not both satisfy the same conditions.

Examples
{
  "type": "text",
  "defaultValue": "This item will only be visible for watches that are rectangular and have a microphone"
  "capabilities": ["MICROPHONE", "RECT"],
}
{
  "type": "section",
  "capabilities": ["NOT_HEALTH"],
  "items": [
    {
      "type": "text",
      "defaultValue": "Only visible for watches that do not support health"
    }
  ]
}

Below is the full list of capabilities

Capability Description
PLATFORM_APLITE Running on Pebble/Pebble Steel.
PLATFORM_BASALT Running on Pebble Time/Pebble Time Steel.
PLATFORM_CHALK Running on Pebble Time Round.
PLATFORM_DIORITE Running on Pebble 2
PLATFORM_EMERY Running on Time 2.
BW Running on hardware that supports only black and white.
COLOR Running on hardware that supports 64 colors.
MICROPHONE Running on hardware that includes a microphone.
SMARTSTRAP Running on hardware that includes a smartstrap connector.
SMARTSTRAP_POWER Running on hardware that includes a powered smartstrap connector.
HEALTH Running on hardware that supports Pebble Health and the HealthService API.
RECT Running on hardware with a rectangular display.
ROUND Running on hardware with a round display.
DISPLAY_144x168 Running on hardware with a 144x168 pixels display.
DISPLAY_180x180_ROUND Running on hardware with a 180x180 pixels round display.
DISPLAY_200x228 Running on hardware with a 200x228 pixels display.

Manipulators

Each component has a manipulator. This is a set of methods used to talk to the item on the page. At a minimum, manipulators must have a .get() and .set(value) method however there are also methods to assist in interactivity such as .hide() and .disable(). NOTE: There is currently no way to disable or hide an entire section. You must disable/hide each item in the section to achieve this effect.

When the config page is closed, the .get() method is run on all components registered with an messageKey to construct the object sent to the C app.

Many of these methods fire an event when the method is called. You can listen for these events with ClayItem.on(). NOTE These events will only be fired if the state actually changes. Eg: If you run the .show() manipulator on an item that is already visible, the show event will not be triggered.

html

Method Returns Event Fired Description
.set( [string|HTML] value) ClayItem change Sets the content of this item.
.get() string Gets the content of this item.
.hide() ClayItem hide Hides the item
.show() ClayItem show Shows the item

button

Method Returns Event Fired Description
.set( [string|HTML] value) ClayItem change Sets the content of this item.
.get() string Gets the content of this item.
.disable() ClayItem disabled Prevents this item from being clicked by the user.
.enable() ClayItem enabled Allows this item to be clicked by the user.
.hide() ClayItem hide Hides the item
.show() ClayItem show Shows the item

val

Method Returns Event Fired Description
.set( [string] value) ClayItem change Sets the value of this item.
.get() string Gets the content of this item.
.disable() ClayItem disabled Prevents this item from being edited by the user.
.enable() ClayItem enabled Allows this item to be edited by the user.
.hide() ClayItem hide Hides the item
.show() ClayItem show Shows the item

checked

Method Returns Event Fired Description
.set( [boolean|int] value) ClayItem change Check/uncheck the state of this item.
.get() boolean true if checked, false if not. NOTE this will be converted to a 1 or 0 when sent to the watch. See Clay.getSettings()
.disable() ClayItem disabled Prevents this item from being edited by the user.
.enable() ClayItem enabled Allows this item to be edited by the user.
.hide() ClayItem hide Hides the item
.show() ClayItem show Shows the item

color

Method Returns Event Fired Description
.set( [string|int] value) ClayItem change Sets the color picker to the provided color. If the value is a string, it must be provided in hex notation eg 'FF0000'.
.get() int Get the chosen color. This is returned as a number in order to make it easy to use on the watch side using GColorFromHEX().
.disable() ClayItem disabled Prevents this item from being edited by the user.
.enable() ClayItem enabled Allows this item to be edited by the user.
.hide() ClayItem hide Hides the item
.show() ClayItem show Shows the item

radiogroup

Method Returns Event Fired Description
.set( [string] value) ClayItem change Checks the radio button that corresponds to the provided value.
.get() string Gets the value of the checked radio button in the list.
.disable() ClayItem disabled Prevents this item from being edited by the user.
.enable() ClayItem enabled Allows this item to be edited by the user.
.hide() ClayItem hide Hides the item
.show() ClayItem show Shows the item

checkboxgroup

Method Returns Event Fired Description
.set( [array] value) ClayItem change Checks the checkboxes that corresponds to the provided list of values.
.get() Array.<string> Gets an array of booleans representing the list the checked items. NOTE: each item in the array will be converted to an int when sent to the watch. See Clay.getSettings()
.disable() ClayItem disabled Prevents this item from being edited by the user.
.enable() ClayItem enabled Allows this item to be edited by the user.
.hide() ClayItem hide Hides the item
.show() ClayItem show Shows the item

slider

Method Returns Event Fired Description
.set( [number] value) ClayItem change Sets the value of this item.
.get() number Gets the value of this item.
.disable() ClayItem disabled Prevents this item from being edited by the user.
.enable() ClayItem enabled Allows this item to be edited by the user.
.hide() ClayItem hide Hides the item
.show() ClayItem show Shows the item

Extending Clay

Clay is built to allow developers to add their own basic interactivity to the config page. This can be done in a number of ways:

Handling The 'showConfiguration' and 'webviewclosed' Events Manually

Clay will by default, automatically handle the 'showConfiguration' and 'webviewclosed' events. This allows the messageKey of each config item to be automatically delivered to the InboxReceivedHandler on the watch side. If you wish to override this behavior and handle the events yourself, pass an object as the 3rd parameter of the Clay constructor with autoHandleEvents set to false.

Example:

var Clay = require('pebble-clay');
var clayConfig = require('./config');
var clayConfigAplite = require('./config-aplite');
var clay = new Clay(clayConfig, null, { autoHandleEvents: false });

Pebble.addEventListener('showConfiguration', function(e) {
  
  // This is an example of how you might load a different config based on platform.
  var platform = clay.meta.activeWatchInfo.platform || 'aplite';
  if (platform === 'aplite') {
    clay.config = clayConfigAplite;
  }
  
  Pebble.openURL(clay.generateUrl());
});

Pebble.addEventListener('webviewclosed', function(e) {
  if (e && !e.response) {
    return;
  }

  // Get the keys and values from each config item
  var dict = clay.getSettings(e.response);

  // Send settings values to watch side
  Pebble.sendAppMessage(dict, function(e) {
    console.log('Sent config data to Pebble');
  }, function(e) {
    console.log('Failed to send config data!');
    console.log(JSON.stringify(e));
  });
});

Clay API (app.js)

Clay([Array] config, [function] customFn, [object] options)

Constructor Parameters

Parameter Type Description
config Array The config that will be used to generate the configuration page
customFn Function|null (Optional) The custom function to be injected into the generated configuration page.
options Object (Optional) See below for properties
options.autoHandleEvents Boolean (Optional) Defaults to true. If set to false, Clay will not auto handle the showConfiguration and webviewclosed events
options.userData Any (Optional) Any arbitrary data you want to pass to your config page. It will be available in your custom function as this.meta.userData

Properties

Property Type Description
.config Array Copy of the config passed to the constructor and used for generating the page.
.customFn Function Reference to the custom function passed to the constructor. WARNING this is a direct reference, not a copy of the custom function so any modification you make to it, will be reflected on the original as well
.meta Object Contains information about the current user and watch. WARNING This will only be populated in the showConfiguration event handler. (See example above)
.meta.activeWatchInfo watchinfo|null An object containing information on the currently connected Pebble smartwatch or null if unavailable. Read more here.
.meta.accountToken String A unique account token that is associated with the Pebble account of the current user. Read more here.
.meta.watchToken String A unique token that can be used to identify a Pebble device. Read more here.
.meta.userData Any A deep copy of the arbitrary data provided in the options.userData. Defaults to an empty object
.version String The version of Clay currently being used.

Methods

Method Returns
Clay( [array] config, [function] customFn=null, [object] options={autoHandleEvents: true})
config - an Array representing your config
customFn - function to be run in the context of the generated page
options.autoHandleEvents - set to false to prevent Clay from automatically handling the "showConfiguration" and "webviewclosed" events		 Clay - a new instance of Clay.
.registerComponent( [ClayComponent] component )
Registers a custom component.		 void.
.generateUrl() string - The URL to open with Pebble.openURL() to use the Clay-generated config page.
.getSettings( [object] response, [boolean] convert=true)
response - the response object provided to the "webviewclosed" event
convert - Pass false to not convert the settings to be compatible with Pebble.sendAppMessage()		 Object - object of keys and values for each config page item with an messageKey, where the key is the messageKey and the value is the chosen value of that item.

This method will do some conversions depending on the type of the setting. Arrays will use message key array syntax to make the values of each item in the array available as individual message keys. Booleans will be converted to numbers. eg true becomes 1 and false becomes 0. If the value is a number or an array of numbers and the optional property: "precision" is the power of precision (value * 10 ^ precision) and then floored. Eg: 1.4567 with a precision set to 3 will become 1456. Pass false as the second parameter to disable this behavior. See the example below for how this all works
.setSettings( [string] key, [*] value )
key - The key for the setting you want to set.
value - The value of the setting you want to set.		 void
.setSettings( [object] settings )
settings - An object of key/value pairs that you would like to update the settings with. eg { user_name: 'Emily', show_animations: true }		 void

.getSettings() Example

// webviewclosed response
{
  "favorite_food": {"value": [1, 0, 1]},
  "cool_things_enabled": {"value": true},
  "user_name": {"value": "Jane Doe"},
  "date_of_birth[0]": {"value": 1989},
  "date_of_birth[1]": {"value": 11},
  "date_of_birth[2]": {"value": 28},
  "rating": {"value": 3.5, "precision": 1},
}

// resulting converted values

var messageKeys = require('message_keys');

messageKeys.favorite_food + 0 = 1;
messageKeys.favorite_food + 1 = 0;
messageKeys.favorite_food + 2 = 1;
messageKeys.cool_things_enabled = 1;
messageKeys.user_name = 'Jane Doe';
messageKeys.date_of_birth + 0 = 1989;
messageKeys.date_of_birth + 1 = 11;
messageKeys.date_of_birth + 2 = 28;
messageKeys.rating = 35;

Custom Function

When initializing Clay in your app.js file, you can optionally provide a function that will be copied and run on the generated config page.

IMPORTANT: This function is injected by running .toString() on it. If you are making use of require or any other dynamic features, they will not work. You must make sure that everything the function needs to execute is available in the function body itself.

This function, when injected into the config page, will be run with ClayConfig as its context (this), and Minified as its first parameter.

Make sure to always wait for the config page to be built before manipulating items. You do this by registering a handler for the Clay.EVENTS.AFTER_BUILD event (see below).

Example

app.js
var Clay = require('pebble-clay');
var clayConfig = require('./config');
var customClay = require('./custom-clay');
var userData = {token: 'abc123'}
var clay = new Clay(clayConfig, customClay, {userData: userData});
custom-clay.js
module.exports = function(minified) {
  var clayConfig = this;
  var _ = minified._;
  var $ = minified.$;
  var HTML = minified.HTML;

  function toggleBackground() {
    if (this.get()) {
      clayConfig.getItemByMessageKey('background').enable();
    } else {
      clayConfig.getItemByMessageKey('background').disable();
    }
  }

  clayConfig.on(clayConfig.EVENTS.AFTER_BUILD, function() {
    var coolStuffToggle = clayConfig.getItemByMessageKey('cool_stuff');
    toggleBackground.call(coolStuffToggle);
    coolStuffToggle.on('change', toggleBackground);
    
    // Hide the color picker for aplite
    if (!clayConfig.meta.activeWatchInfo || clayConfig.meta.activeWatchInfo.platform === 'aplite') {
      clayConfig.getItemByMessageKey('background').hide();
    }
    
    // Set the value of an item based on the userData
    $.request('get', 'https://some.cool/api', {token: clayConfig.meta.userData.token})
      .then(function(result) {
        // Do something interesting with the data from the server
      })
      .error(function(status, statusText, responseText) {
        // Handle the error
      });
  });
  
};

Clay API (Custom Function)

ClayConfig([Object] settings, [Array] config, [$Minified] $rootContainer)

This is the main way of talking to your generated config page. An instance of this class will be passed as the context of your custom function when it runs on the generated config page.

Properties

Property Type Description
.EVENTS.BEFORE_BUILD String Dispatched prior to building the page.
.EVENTS.AFTER_BUILD String Dispatched after building the page.
.EVENTS.BEFORE_DESTROY String Dispatched prior to destroying the page.
.EVENTS.AFTER_DESTROY String Dispatched after destroying the page.
.config Array Reference to the config passed to the constructor and used for generating the page.
.meta Object Contains information about the current user and watch
.meta.activeWatchInfo watchinfo|null An object containing information on the currently connected Pebble smartwatch or null if unavailable. Read more here.
.meta.accountToken String A unique account token that is associated with the Pebble account of the current user. Read more here.
.meta.watchToken String A unique token that can be used to identify a Pebble device. Read more here.
.meta.userData Any The data passed in the options.userData of the Clay constructor.

Methods

Method Returns
.getAllItems() Array.<ConfigItem> - an array of all config items.
.getItemByMessageKey( [string] messageKey ) ConfigItem|undefined - a single ConfigItem that has the provided messageKey, otherwise undefined.
.getItemById( [string] id ) ConfigItem|undefined - a single ConfigItem that has the provided id, otherwise undefined.
.getItemsByType( [string] type ) Array.<ConfigItem> - an array of config items that match the provided type.
.getItemsByGroup( [string] group ) Array.<ConfigItem> - an array of config items that match the provided group.
.serialize() Object - an object representing all items with an messageKey where the key is the messageKey and the value is an object with the value property set to the result of running .get() on the Clay item. If the Clay item has a precision property set, it is included in the object
.build()
Builds the config page. Will dispatch the BEFORE_BUILD event prior to building the page, then the AFTER_BUILD event once it is complete. If the config page has already been built, then the ClayConfig.destroy() method will be executed prior to building the page again.		 ClayConfig
.destroy()
Destroys the config page. Will dispatch the BEFORE_DESTROY event prior to destroying the page, then the AFTER_DESTROY event once it is complete. This method wipes the config page completely, including all existing items. You will need to make sure that you re-attach your event handlers for any items that are replaced		 ClayConfig
.on( [string] events, [function] handler )
Register an event to the provided handler. The handler will be called with this instance of ClayConfig as the context. If you wish to register multiple events to the same handler, then separate the events with a space		 ClayConfig
.off( [function] handler )
Remove the given event handler. NOTE: This will remove the handler from all registered events.		 ClayConfig
.trigger( [string] name, [object] eventObj={} )
Trigger the provided event and optionally pass extra data to the handler.		 ClayConfig
.registerComponent( [ClayComponent] component )
Registers a component. You must register all components prior to calling .build(). This method is also available statically.		 Boolean - true if the component was registered successfully, otherwise false.

ClayItem( [Object] config )

Properties

Property Type Description
.id String The ID of the item if provided in the config.
.messageKey String The messageKey of the item if provided in the config.
.config Object Reference to the config passed to the constructer.
$element $Minified A Minified list representing the root HTML element of the config item.
$manipulatorTarget $Minified A Minified list representing the HTML element with data-manipulator-target set. This is generally pointing to the main <input> element and will be used for binding events.

Methods

Method Returns
.initialize( [ClayConfig] clay)
You shouldn't ever need to run this method manually as it will automatically be called when the config is built.		 ConfigItem
.on( [string] events, [function] handler )
Register an event to the provided handler. The handler will be called with this instance of ClayItem as the context. If you wish to register multiple events to the same handler, then separate the events with a space. Events will be registered against the $manipulatorTarget so most DOM events such as "change" or "click" can be listened for.		 ClayItem
.off( [function] handler )
Remove the given event handler. NOTE: This will remove the handler from all registered events.		 ClayItem
.trigger( [string] name, [object] eventObj={} )
Trigger the provided event and optionally pass extra data to the handler.		 ClayItem

In addition to the methods above, all the methods from the item's manipulator will be attached to the ClayItem. This includes .set() and .get().

Custom Components

Clay is also able to be extended using custom components. This allows developers to share components with each other.

Component Structure

Components are simple objects with the following properties.

ClayComponent

Property Type Required Description
name string yes This is the unique way to identify the component and will be used by the config item's type.
template string (HTML) yes This is the actual HTML content of the component. Make sure there is only one root node in the HTML. This HTML will be passed to Minified's HTML() method. Any properties provided by the config item will be made available to the template, eg: label. The template will also be provided with clayId as a unique way to set input name attributes.
style string no Any extra CSS styles you want to inject into the page. Make sure to namespace your CSS with a class that is unique to your component in order to avoid conflicts with other components.
manipulator string / manipulator yes Provide a string here to use one of the built-in manipulators, such as val. If an object is provided, it must have both a .set(value) and .get() method.
defaults object Only if your template requires it. An object of all the defaults your template requires.
initialize function no Method which will be called after the item has been added to the page. It will be called with the ClayItem as the context (this) and with minified as the first parameter and clayConfig as the second parameter

Registering a custom component.

Components must be registered before the config page is built. The easiest way to do this is in your app.js after you have initialized Clay:

var Clay = require('pebble-clay');
var clayConfig = require('./config.json');
var clay = new Clay(clayConfig);

clay.registerComponent(require('./my-custom-component'));

Minified

Minified is a super light JQuery-like library. We only bundle in a small subset of its functionality. Visit the Minified Docs for more info on how to use Minified. Below is the subset of methods available in Clay.

  • $()
  • $$()
  • .get()
  • .select()
  • .set()
  • .add()
  • .ht()
  • HTML()
  • $.request()
  • promise.always()
  • promise.error()
  • $.off()
  • $.ready()
  • $.wait()
  • .on()
  • .each()
  • .find()
  • _()
  • _.copyObj()
  • _.eachObj()
  • _.extend()
  • _.format()
  • _.formatHtml()
  • _.template()
  • _.isObject()

Migrating from v0.1.x to v1.x

There were some changes in the 3.13 SDK that required Clay to undergo some major changes. For the majority of developers a simple find and replace over your config will do the trick.

appKey is now messageKey.

You will need to update your config files and change any items that use appKey to messageKey

Example
{
  "type": "toggle",
  "appKey": "invert",
  "label": "Invert Colors",
  "defaultValue": true
}

becomes:

{
  "type": "toggle",
  "messageKey": "invert",
  "label": "Invert Colors",
  "defaultValue": true
}

clayConfig.getItemByAppKey is now clayConfig.getItemByMessageKey.

If you have a custom function and are using the clayConfig.getItemByAppKey() method you will need to change this to clayConfig.getItemByMessageKey()

clay.getSettings() will now by default, return an object where the keys are numbers.

In the past, clay.getSettings() would return something that looked like:

{
  BACKGROUND_COLOR: 0,
  NAME: 'Jane Doe',
  ENABLE_TOOLS: 1
}

It now uses the values provided in the message_keys module to construct this object. The new format looks something like:

{
  10000: 0,
  10001: 'Jane Doe',
  10002: 1
}

If you wish to find out what keys are associated with what values, you must use the message_keys module.

var messageKeys = require('message_keys');

Pebble.addEventListener('webviewclosed', function(e) {
  // Get the keys and values from each config item
  var claySettings = clay.getSettings(e.response);

  // In this example messageKeys.NAME is equal to 10001
  console.log('Name is ' + claySettings[messageKeys.NAME]); // Logs: "Name is Jane Doe"
});

NOTE: The above only applies to the default behavior of the method. If you pass false to the second argument, a standard object will be returned with the messageKey as the key.

Pebble.addEventListener('webviewclosed', function(e) {

  clay.getSettings(e.response);
    /* returns:
    {
      10000: 0,
      10001: 'Jane Doe',
      10002: 1
    }
    */

  clay.getSettings(e.response, false);
    /* returns:
    {
      BACKGROUND_COLOR: {value: 0},
      NAME: {value: 'Jane Doe'},
      ENABLE_TOOLS: {value: true}
    }

    Notice that the value for ENABLE_TOOLS was not converted to a number from a boolean
    */
});

Checkbox groups now use arrays.

In the previous version of Clay, checkbox groups would split the values of the items with zeros. This made for clumsy usage on the C side. Checkbox groups are now much simpler to use thanks to message keys. You will however need to update you config to the new format.

Changes:

  • defaultValue and the value that is returned by the .get() method is now an array of booleans.
  • options are now an array of labels and do not have their own value
  • Instead of splitting the result on the C side you now use the message key syntax. In the example below MESSAGE_KEY_favorite_food + 2 would have a value of 1

Old Format

{
  "type": "checkboxgroup",
  "appKey": "favorite_food",
  "label": "Favorite Food",
  "defaultValue": ["sushi", "burgers"],
  "options": [
    {
      "label": "Sushi",
      "value": "sushi"
    },
    {
      "label": "Pizza",
      "value": "pizza"
    },
    {
      "label": "Burgers",
      "value": "burgers"
    }
  ]
}

New Format

{
  "type": "checkboxgroup",
  "messageKey": "favorite_food",
  "label": "Favorite Food",
  "defaultValue": [true, false, true],
  "options": ["Sushi", "Pizza", "Burgers"]
}

Clay is now a pebble package

You no longer need to download a file into your project. Clay is now a Pebble package so you can go ahead and delete your clay.js and follow the getting started guide above to install clay in your project.

Prior to SDK 3.13, require paths were handled in a non-standard way. When requiring modules, the name of the module was sufficient (ie. require('config.json')). However, with the release of SDK 3.13, the require paths changed so that you now have to require the module by using its path relative to the file it's being required in. This means requiring the config module now is done in app.js by using require('./clay-config.json'). An incorrect path would result in an error similar to this:

[14:16:03] javascript> JavaScript Error:
Error: Cannot find module 'clay-config.json'
    at Object.loader.require (loader.js:66:11)
    at _require.require (loader.js:54:48)
    at Object.loader (src/js/app.js:1:1)
    at _require (loader.js:57:10)
    at Object.loader.require (loader.js:69:10)

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