Book Image

Windows Application Development Cookbook

By : Marcin Jamro
Book Image

Windows Application Development Cookbook

By: Marcin Jamro

Overview of this book

Need to ensure you can always create the best Windows apps regardless of platform? What you need are solutions to the biggest issues you can face, so you can always ensure you’re making the right choices and creating the best apps you can. The book starts with recipes that will help you set up the integrated development environment before you go ahead and design the user interface. You will learn how to use the MVVM design pattern together with data binding, as well as how to work with data in different file formats. Moving on, you will explore techniques to add animations and graphics to your application, and enable your solution to work with multimedia content. You will also see how to use sensors, such as an accelerometer and a compass, as well as obtain the current GPS location. You will make your application ready to work with Internet-based scenarios, such as composing e-mails or downloading files, before finally testing the project and submitting it to the Windows Store. By the end of the book, you will have a market-ready application compatible across different Windows devices, including smartphones, tablets, and desktops.
Table of Contents (17 chapters)
Windows Application Development Cookbook
About the Author
About the Reviewer

Modifying an image

An application may not only present images, but also modify them, such as by rotating, flipping, adjusting contrast, or by adding some additional shapes to it. Such features can be used to allow a user to adjust the photo after taking it using a camera or to create some special effects. Such a task is significantly simplified by the WriteableBitmapEx library ( ), which can be downloaded using the NuGet Package Manager, as you will see in this recipe.

As an example, you will create a simple application that loads the Image.jpg file from the Assets directory and performs a set of modifications, namely adjusting contrast and brightness, vertical flipping, as well as drawing two rectangles. At the end, the modified version will be presented in the user interface.

Getting ready

To step through this recipe, you only need the automatically generated project.

How to do it...

To prepare an example that modifies the image by adjusting contrast...