Clicklockd

Clicklockd enables you to highlight or drag without holding down the mouse button. This feature allows you to hold the mouse button for a few seconds, move the mouse to the new location, and then click it again. The effect is the same as a drag and drop but without having to hold the mouse button for a long time.

Requirements

Linux with gcc
libudev

sudo apt install build-essential libudev-dev # Debian, Ubuntu, and derivatives

sudo dnf install make gcc systemd-devel # Fedora, CentOS, RHEL, and derivatives

sudo zypper install make gcc systemd-devel # openSUSE, SLE, and derivatives

Installation

wget https://github.com/germag/clicklockd/archive/refs/heads/master.tar.gz
tar xf master.tar.gz
cd clicklockd-master
make
sudo make install

Enabling clicklockd permanently with systemd

sudo install --mode 644 clicklockd.service /etc/systemd/system
sudo systemctl daemon-reload
sudo systemctl enable --now clicklockd.service

Options

-h, --help
Print help and exit.

-t, --holding-time <time[s|ms]> Set how many seconds (s) or milliseconds (ms) you need to hold down a mouse or trackball button before your click is locked. You can use real numbers or integers. If the unit of time is not specified, clicklockd assumes seconds (s). Default is 2 seconds.
Ex: -t 1.5s (or -t 1.5) is the same as -t 1500ms

-b, --daemonize
Run clicklockd as background process (as a Unix daemon).

-p, --pidfile
This option tells clicklockd to use the specified file as its pidfile. If the file exists, it will be removed and over-written. Default is /var/run/clicklockd.pid.

-u, --uinput-device
Set uinput device. Requires a 2.6 kernel with uinput support. Default is /dev/uinput.

--left-handed
Left-handed mode switches the left and right buttons.

Making an option permanent

Edit the service file /etc/systemd/system/clicklockd.service: add your desired option(s) at the end of the line ExecStart=/usr/local/bin/clicklockd.
Restart the service to apply the changes:

sudo systemctl daemon-reload
sudo systemctl restart clicklockd.service

Uninstallation

sudo systemctl disable --now clicklockd.service # disable the service
sudo rm -f /etc/systemd/system/clicklockd.service
sudo rm -f /usr/local/bin/clicklockd