Chapter 21

Question 1

What are input events

Answer 1

Events coming from keyboard, stylus, multi touch screen

Question 2

What are routed events

Answer 2

A routed event is a type of event that can invoke handlers on multiple listeners in an element tree, rather than just on the object that raised the event.

Question 3

What are 2 types of elements tree

Answer 3

1. Logical element tree

2. Visual element tree

Question 4

What are 3 routing strategies of routed events

Answer 4

1. Bubbling: Event handlers on the event source are invoked. Events handlers starts from the source until the root
2. Tunneling: Initially, event handlers at the element tree root are invoked. Event moves from top to bottom. It is reverse of bubble.
3. Direct: Event is only intended to the element and that’s it.

Question 5

What is the purpose of handler mark

Answer 5

It means there is no need to further process it.