我需要获取桌面中显示或隐藏的所有窗口的列表

Question

I'm trying to code something using X11 related libraries such as Xlib and Xrandr .

At first I was expecting a full coverage of the real basic functions such as retrieving the refresh rate from the monitors from Xlib alone, later on I find out that I need Xrandr for that.

Now I need to get the list of all the windows displayed or hidden in the desktop, I'm not thinking about using Gnome/KDE/XFCE ... extensions because I know that those are just decorators for X11, but I can't really find a function or a macro that is able to enumerate the open windows in the X server. I also need to get the ID/name of the window that is under focus.

My question is: Xlib alone is capable of doing this ? Because from the terminology that Xlib adopts, I have my doubts that this functions could possibly even exist.

Answer 1

You can get a list of child windows with XQueryTree

XQueryTree - query window tree information

Status XQueryTree(Display *display, Window w, Window *root_return, Window *parent_return, Window **children_return, unsigned int *nchildren_return);

So, to get a complete list, you'll have to start with the root window and recursively call it for all the children of each window.