Essential Windows Presentation Foundation

7. Actions

IN CHAPTER 6 WE looked at how to include data in an application and visualize it in interesting ways. Up to now we have focused on the output side of the platform, looking at how an application is built up from controls that use visuals to display and layout to position everything. Now we can start to look at the input side of the platform.

Often we want an application to respond in some way when a user moves the mouse, clicks a button, presses a key, or draws with a pen. Windows Presentation Foundation has three common ways of dealing with actions: events, commands, and triggers. We will look at the principles that apply to all three of these mechanisms, and then dig into the details about each one.

Action Principles

For actions, ...