TimeOffset as from/to frames: offset = frame_to - frame_from, with buttons to set either to the current frame.
Time Pin wraps TimeOffset with frame_from and frame_to knobs. The internal offset is simply frame_to minus frame_from.
Current Frame buttons stamp either end from the playhead. Easier than mental math on a bare TimeOffset when you know source and destination frames.
set cut_paste_input [stack 0]
version 13.2 v4
push $cut_paste_input
Group {
name timePin
tile_color 0x421010ff
selected true
xpos -237
ypos -175
addUserKnob {20 User l timePin}
addUserKnob {3 frame_from l from}
frame_from 19
addUserKnob {22 set_current_to l "Current Frame" -STARTLINE T "nuke.thisNode()\['frame_from'].setValue(nuke.frame())"}
addUserKnob {3 frame_to l to t "nuke.thisNode()\['frame_to'].setValue(nuke.frame())"}
frame_to 30
addUserKnob {22 set_current_from l "Current Frame" -STARTLINE T "nuke.thisNode()\['frame_to'].setValue(nuke.frame())"}
addUserKnob {26 "" +STARTLINE}
addUserKnob {26 label_1 l "" +STARTLINE T "Time Pin v1.0"}
addUserKnob {22 website l DerekVFX.ca +STARTLINE}
}
Input {
inputs 0
name Input
xpos -218
ypos -215
}
TimeOffset {
time_offset {{"frame_to - frame_from "}}
time ""
name TimeOffset1
selected true
xpos -218
ypos -191
}
Output {
name Output1
xpos -184
ypos -75
}
end_group