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// this import should be first in order to load some required settings (like globals and reflect-metadata)
import {nativeScriptBootstrap} from "nativescript-angular/application";
import {Component} from "@angular/core";
import {RouterConfig} from "@angular/router";
import {NS_ROUTER_DIRECTIVES, nsProvideRouter} from "nativescript-angular/router";
import {Page} from "ui/page";
import {Color} from "color";

@Component({
    selector: "my-app",

vakrilov

import {Directive, ViewContainerRef, TemplateRef, Inject} from '@angular/core';
import {Device, platformNames} from "platform";
import {DEVICE} from "nativescript-angular/platform-providers";

@Directive({ selector: "[ifAndroid]" })
export class IfAndroidDirective {
    constructor( @Inject(DEVICE) device: Device, container: ViewContainerRef, templateRef: TemplateRef<Object>) {
        if (device.os === platformNames.android) {
            container.createEmbeddedView(templateRef);
        }

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<StackLayout>
    <ListView [items]="listItems" rowHeight="60" [itemTemplateSelector]="templateSelector">
        <template nsTemplateKey="odd" let-item="item">
            <StackLayout class="odd">
                <Image [src]="item.image"></Image>
                <Label [text]='item.date' textWrap="true" style="padding-left:10;"></Label>
            </StackLayout>
        </template>

        <template nsTemplateKey="even" let-item="item">

vakrilov

Writing UI plugins for NativeScript

This article will guide you through the process of creating UI plugin and will try to explain new concepts on the way. All the code is in TypeScript and assume you are using NativeScript 3.0 or newer.

In this article you’ll create a simple button plugin to get an idea of how to build your own NativeScript UI plugins.

Before we start we need to create 4 files: my-button.d.ts, my-button-base.ts, my-button.android.ts and my-button.ios.ts.

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<StackLayout class="page" rows="auto, auto, *">
    <Button text="start" (tap)="start()"></Button>
    <Button text="stop" (tap)="stop()"></Button>
    <Label text="HEYA" class="h2 text-center" [scaleX]="scale" [scaleY]="scale" margin="100"></Label>
</StackLayout>

vakrilov

var app = require("tns-core-modules/application");
var plat = require("tns-core-modules/platform");

exports.turnOn = function (args) {
  flash(true);
}

exports.turnOff = function (args) {
  flash(false);
}

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<ActionBar title="The Morse Code App" class="action-bar">
</ActionBar>

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One of the main goals of [email protected] is to enable more flexible composition of UI. Let's start with some history. Before 4.0 we create Frame control for you (check application.ios.ts and frame.android.ts). Frame control allows you to do navigation forward or backward. While this is convenient it introduce other issues that can't be workaround easliy. For example if you want to have TabView in all pages you have to include it in the xml and set its selectedIndex so that once you navigate to different page a correct TabViewItem is selected. This leads to several problems:

• parse more xml
• increase memory usage
• increase loading time

Same issues apply if you want to have SideDrawer control as a root component.

So in order to resolve these starting with 4.0 applicat

vakrilov

import { StackLayout } from "tns-core-modules/ui/layouts/stack-layout";
import { isAndroid, isIOS } from "tns-core-modules/platform";
import { View } from "tns-core-modules/ui/core/view";
import { registerElement } from "nativescript-angular/element-registry";

export class NotifyLayoutView extends StackLayout {
    private listener: android.view.View.OnLayoutChangeListener
    public createNativeView() {
        const nativeView = super.createNativeView();

vakrilov

import { Component } from "@angular/core";
import { View } from "tns-core-modules/ui/core/view";

@Component({
    selector: "ns-app",
    template: `
    <GridLayout rows="auto * auto">
        <Label text="------>>>>>"></Label>
        <notify-layout-view row="1" backgroundColor="lightgreen" (layout)="onLayout($event)"></notify-layout-view>
        <Label text="------>>>>>" row="2"></Label>