Take a screenshot using `import` from ImageMagick:
$ import screenshot.png <--- Click on the
window to screenshot
$ import -window 0x121f2ef screenshot.png <--- Specify the window
$ import -window root screenshot.png <--- The lot
What's the current X window ID?
$ xprop -root _NET_ACTIVE_WINDOW
_NET_ACTIVE_WINDOW(WINDOW): window id # 0x121f2ef
$ xprop -root _NET_ACTIVE_WINDOW | cut -d' ' -f5
0x121f2ef
Glue it all together:
import -window $(xprop -root _NET_ACTIVE_WINDOW | cut -d' ' -f5)
~/screenshot_$(/bin/date +%Y%m%dT%H%M%S).png
I use the i3 window manager, so I've loaded it up into a key-binding:
bindsym Print exec import -window $(xprop -root _NET_ACTIVE_WINDOW |
cut -d' ' -f5) ~/screenshot_$(/bin/date +%Y%m%dT%H%M%S).png
Gnome screenshot can be used to achieve the same outcome (a lot more
simply). It drops the result into your home directory by default:
$ gnome-screenshot
$ gnome-screenshot --window
$ gnome-screenshot --window --delay 2
$ gnome-screenshot --interactive
Just for fun.
Douglas.
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