WPF routing

give an example ： window - User control - Layout control -…- Button

Button click event ： Button first Click The corresponding , then …., Then layout the controls , Then the user control , And then the window
Similar anomaly , until “ Processing is complete ”
（ In fact, general buttons can be handled by themselves ）

Routing events

Routing priority ：local>trigger>setter

stay local Width is set in ,trigger The modification of is invalid