Book Image

Windows Presentation Foundation 4.5 Cookbook

By : Pavel Yosifovich
Book Image

Windows Presentation Foundation 4.5 Cookbook

By: Pavel Yosifovich

Overview of this book

Windows Presentation Foundation (WPF) provides developers with a unified programming model for building rich Windows smart client user experiences that incorporate UI, media, and documents.WPF has become the leading technology for developing rich client applications on the Windows platform, packed with features and capabilities. However, WPF is big; in fact, it's huge, causing a steep learning curve for the beginner and even for those already using some WPF features.Windows Presentation Foundation 4.5 Cookbook provides clear recipes for common WPF tasks. It includes detailed explanations and code examples for customizing and enhancing the basic scenarios, while gaining a deep understanding of WPF mechanics and capabilities.WPF is different and requires a different mind-set and approach. This book provides recipes and insights not only in its design but also its practical implementation details.Starting from the foundations of WPF, such as dependency properties and XAML, the book touches on all major WPF aspects, such as controls and layout, resources, and digs deep into its unprecedented data binding capabilities.The book shows data and control templates in action, which allow full customizations of displayed data and controls in a declarative way. Supported by styles and resources makes data binding all the more powerful. The Model View View-Model pattern is presented as an effective way of maximizing decoupling of components, while providing an elegant way of expanding applications while maintaining a tight grip on complexity.The later parts discuss custom elements and controls ñ the ultimate customization mechanism, and looks at multithreading issues, and how .NET 4.5 task parallelism features can enhance application performance.
Table of Contents (18 chapters)
Windows Presentation Foundation 4.5 Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Implementing drag-and-drop


Drag-and-drop functionality is common in applications, where one object is held down and dragged to some other object with the mouse. This approach is not as common as it used to be, especially with a mouse, because it requires hand coordination skills. Recent tablet devices are touch enabled, where drag and drop makes a lot of sense. As a general rule, always provide an alternative to drag-and-drop. That said, this can be a handy feature for advanced users.

Getting ready

Make sure Visual Studio is up and running.

How to do it...

We'll create an application that allows dragging elements (circles and rectangles) from one part of the window to another container within the same window, showing the necessary steps to get drag-and-drop working properly:

  1. Create a new WPF application named CH03.SimpleDragDrop.

  2. Open MainWindow.xaml. Fill the existing Grid with the following markup:

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="2*"/>
     ...