User interfaces change state. An email client might have online/offline views and might display emails in full/collapsed views. At a more granular level, a CheckBox control might have states like checked, unchecked, enabled, disabled and so on. This screencast looks at how the Silverlight UI model handles state changes.
The notion of controls transitioning between states is at the heart of the Silverlight UI model. In this video we'll show how we can build a "popout panel" in Expression Blend by defining visual states for our user interface, the animation transitions between them and the interactive behavior that causes those transitions to take place. All of this is done via drag-and-drop in the design tool.