Is there any Spy++ equivalent for linux/x window? [closed]

Question

Spy++ is a tool for windows that let the user spy on windows attributes, child windows and the message that it will process. It is handy utility to debugging UI related code.

Answer 1

Back then, i tested my middle mouse button using a tool called xev. It creates a new window, which you can send events (by clicking on it, or pressing buttons) which are catched and printed on stdout. According to a comment by jpalecek, it can also be used to watch other windows, instead of a new one. The following will watch events from a window you selected by clicking on it:

xev -id $(xwininfo | awk '/Window id/ { print $4 }')

For gathering general information, xwininfo can be used, which can display children, attributes and more.

Answer 2

I've seen a "spy" feature from Squish. This is a GUI testing tool.

Answer 3

WinFormSpy provides some of the basic features provided by Spy++ for winform applications running using mono.

It allows viewing certain windows attributes and shows the window structure as a tree.