/
freeboardRandomDataSource.js
82 lines (66 loc) · 1.68 KB
/
freeboardRandomDataSource.js
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//freeboard random data source
//Rafael Aroca - July/2021
(function () {
var randomDatasource = function (settings, updateCallback) {
var self = this;
var updateTimer = null;
var currentSettings = settings;
function updateRefresh(refreshTime) {
if (updateTimer) {
clearInterval(updateTimer);
}
updateTimer = setInterval(function () {
self.updateNow();
}, refreshTime);
}
updateRefresh(currentSettings.refresh * 1000);
this.updateNow = function () {
var num=Math.random() * (currentSettings.max - currentSettings.min) + currentSettings.min;
data=Math.round((num * 100) / 100).toFixed(currentSettings.decimalPlates);
updateCallback(data);
}
this.onDispose = function () {
clearInterval(updateTimer);
updateTimer = null;
}
this.onSettingsChanged = function (newSettings) {
errorStage = 0;
currentSettings = newSettings;
updateRefresh(currentSettings.refresh * 1000);
self.updateNow();
}
};
freeboard.loadDatasourcePlugin({
type_name: "Random Data Source",
settings: [
{
name: "max",
display_name: "Maximum",
type: "text",
description: "Maximum random number"
},
{
name: "min",
display_name: "Minimum",
type: "text",
description: "Minimum random number"
},
{
name: "decimalPlates",
display_name: "Decimal Plates",
type: "text",
description: "Decimal plates"
},
{
name: "refresh",
display_name: "Refresh Every",
type: "number",
suffix: "seconds",
default_value: 5
}
],
newInstance: function (settings, newInstanceCallback, updateCallback) {
newInstanceCallback(new randomDatasource(settings, updateCallback));
}
});
}());