Embedded Systems LogicMachine5 - Page 57

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rows) on widget element. Width formula: cols * 110  10, height formula: rows * 110  10
Example
Clock widget which takes double width/height and places SVG image which fills all available
space inside of widget container:
(function() {
// get widget element and set double width/height
var el = $('#clock').setWidgetSize(2, 2);
$('<object type="image/svg+xml"></object>') // object allows SVG+JavaScript
.css('width', '100%') // full width
.css('height', '100%') // full height
.attr('data', '/apps/data/clock/clock.svg') // SVG image source
.appendTo(el); // add to container
})();
Configuration
• Application directory must contain either config.lp or config.html file
• This file must contain form element, id must be set in myapp-config format, where
myapp is unique application name
• Data exchange is done via events triggered on form element:
◦ config-load  (to app) provides an object with all configuration key/value pairs
◦ config-check  (to app) triggered when Save button is clicked, app configuration
must either show an error message if configuration is invalid or trigger config-save
◦ config-save  (from app) saves configuration on server side and closed modal
window, application must pass configuration parameters as an object
• Configuration can be accessed from Lua using these functions:
◦ config.get(app, key, default)  returns single value for given application name,
default value or nil if key is not found
◦ config.getall(app)  return table with all configuration values for given application
name or nil if configuration is empty
◦ config.set(app, key, value)  adds a new key/value pair or overwrites an existing one
◦ config.setall(app, cfg)  overwrites existing config with given cfg table with
keys/values
◦ config.delete(app, key)  deletes existing key/value pair
• Unpublished apps that have configuration file present will appear under Dev apps in
admin page