Using Timers

API Reference: Timer

Timer allows you to create, start and clear timers.

TypeScript code blocks include examples of how to implement, override and components within the theme. You can create page with the UI Editor to make your page compatible with theming and then you can implement themable components programmatically. Once the page is created with the UI Editor, it generates a class under scripts/generated/pages. You can then extend that class with the following TypeScript classes.

TypeScript
JavaScript
TypeScript
import PageSampleDesign from 'generated/pages/pageSample';
import FlexLayout = require('sf-core/ui/flexlayout');
import Application = require('sf-core/application');
import System = require('sf-core/device/system');
import Button = require("sf-core/ui/button");
import Timer = require("sf-core/global/timer");
//You should create new Page from UI-Editor and extend with it.
export default class Sample extends PageSampleDesign {
myButton: Button;
constructor() {
super();
// Overrides super.onShow method
this.onShow = onShow.bind(this, this.onShow.bind(this));
// Overrides super.onLoad method
this.onLoad = onLoad.bind(this, this.onLoad.bind(this));
this.layout.flexDirection = FlexLayout.FlexDirection.ROW;
this.layout.justifyContent = FlexLayout.JustifyContent.CENTER;
this.layout.alignItems = FlexLayout.AlignItems.CENTER;
this.layout.flexWrap = FlexLayout.FlexWrap.WRAP;
}
setTimer(): void {
const { myButton } = this;
Timer.setTimeout({
task: () : void => {
//@ts-ignore
myButton.dispatch({
type: "updateUserStyle",
userStyle: {
backgroundColor: "#FF0000"
}
});
},
delay: 3000
});
}
}
/**
* @event onShow
* This event is called when a page appears on the screen (everytime).
* @param {function} superOnShow super onShow function
* @param {Object} parameters passed from Router.go function
*/
function onShow(superOnShow: () => void) {
const { headerBar } = System.OS === "Android" ? this : this.parentController;
superOnShow();
Application.statusBar.visible = true;
headerBar.visible = true;
}
/**
* @event onLoad
* This event is called once when page is created.
* @param {function} superOnLoad super onLoad function
*/
function onLoad(superOnLoad: () => void) {
superOnLoad();
this.myButton = new Button({
text: "Set Timer",
onPress: this.setTimer.bind(this)
});
this.layout.addChild(this.myButton, "myButton", ".sf-button");
}
JavaScript
const Page = require("sf-core/ui/page");
const extend = require("js-base/core/extend");
const Color = require('sf-core/ui/color');
const FlexLayout = require('sf-core/ui/flexlayout');
const Button = require("sf-core/ui/button")
const Timer = require("sf-core/global/timer");
var Page1 = extend(Page)(
function(_super) {
_super(this, {
onShow: function(params) {
Application.statusBar.visible = false;
this.headerBar.visible = false;
}
});
this.layout.flexDirection = FlexLayout.FlexDirection.ROW;
this.layout.justifyContent = FlexLayout.JustifyContent.CENTER;
this.layout.alignItems = FlexLayout.AlignItems.CENTER;
var myButton = new Button({
onPress: setTimer
});
function setTimer() {
var myTimer = Timer.setTimeout({
task: changeBackgroundColor,
delay: 3000
});
}
function changeBackgroundColor() {
myButton.backgroundColor = Color.RED;
}
this.layout.addChild(myButton);
}
);
module.exports = Page1;