Book Image

Angular Services

By : Sohail Salehi
Book Image

Angular Services

By: Sohail Salehi

Overview of this book

A primary concern with modern day applications is that they need to be dynamic, and for that, data access from the server side, data authentication, and security are very important. Angular leverages its services to create such state-of-the-art dynamic applications. This book will help you create and design customized services, integrate them into your applications, import third-party plugins, and make your apps perform better and faster. This book starts with a basic rundown on how you can create your own Angular development environment compatible with v2 and v4. You will then use Bootstrap and Angular UI components to create pages. You will also understand how to use controllers to collect data and populate them into NG UIs. Later, you will then create a rating service to evaluate entries and assign a score to them. Next, you will create "cron jobs" in NG. We will then create a crawler service to find all relevant resources regarding a selected headline and generate reports on it. Finally, you will create a service to manage accuracy and provide feedback about troubled areas in the app created. This book is up to date for the 2.4 release and is compatible with the 4.0 release as well, and it does not have any code based on the beta or release candidates.
Table of Contents (15 chapters)
Angular Services
About the Author
About the Reviewer
Customer Feedback

Processing custom events

Let experiment with a few things in the current graph. Grab the root node and move it around very fast. As you can see, it will stretch out then, a few milliseconds later, all cluster center nodes and their children follow its lead. It proves that, behind the scenes, a complete physics engine takes care of all elasticity before finally the graph stabilizes again. From the user perspective, it shows that we have click and drag events already in place:

Let's try something else. Rotate the mouse wheel toward yourself while the pointer is in the modal and it will zoom in the graph. Now click on a empty area and drag the graph up. It will pan down to the lower part of the graph. Finally, click on a node and see how it highlights the node and the edge(s) connected to that node:

So these are all default configurations that come out of the box whenever we create a network graph. Lets see how we can catch an event and perform a custom action.

For example, when we click on an...