dot_tmux-mouse-2.1.conf

## tmux >= 2.1 < 2.4
##   https://bbs.archlinux.org/viewtopic.php?id=204091
##   https://www.reddit.com/r/tmux/comments/3paqoi/tmux_21_has_been_released/cw552qd
set-option -g -q mouse on
bind-key -T root WheelUpPane if-shell -F -t = "#{alternate_on}" "send-keys -M" "select-pane -t =; copy-mode -e; send-keys -M"
bind-key -T root WheelDownPane if-shell -F -t = "#{alternate_on}" "send-keys -M" "select-pane -t =; send-keys -M"
bind-key -t vi-copy WheelUpPane halfpage-up
bind-key -t vi-copy WheelDownPane halfpage-down
bind-key -T root PPage if-shell -F "#{alternate_on}" "send-keys PPage" "copy-mode -e; send-keys PPage"
bind-key -t vi-copy PPage page-up
bind-key -t vi-copy NPage page-down
set -g @scroll-speed-num-lines-per-scroll 0.5