问题
Given the following:
- setting IsTabStop to false on a ContentControl will not prevent its content from acting as a tab-stop
- setting IsTabStop to true will result in an invisible tab-stop, which does nothing, in your application
I have the following two questions:
- Why is IsTabStop true by default for the ContentControl
- Why would I ever want the ControlControl to act as a tab-stop?
回答1:
Douglas is correct ContentControl simply inherits the default value of IsTabStop from Control. Also there is no good reason to assume that the value of true is less valid for a ContentControl than it is for Control.
For example, you might have a control that expects its content be something graphical such a set of Shape elements or an Image. However your control may perform certain operations on the content when the user presses specific keys.
回答2:
The ContentControl gets it's IsTabStop property from Control, so all controls can be tab stops, including ContentControls.
I'm not sure why it is true by default for a ContentControl though, probably just because it defaults to true in Control.
来源：https://stackoverflow.com/questions/3522477/why-would-i-want-istabstop-set-to-true-on-a-contentcontrol