plasmoid

doubletake KDE Plasma System Tray Applet

A Plasma 6 system tray widget for controlling AirPlay screen mirroring via the doubletake daemon.

Prerequisites

• KDE Plasma 6 (Plasma 5 should also work with minor QML import adjustments)
• doubletake running (provides the Unix socket control interface)
• doubletake-ctl on your $PATH (the applet shells out to it)

Install

# Build the daemon and ctl binaries
cd /path/to/doubletake
go build -o doubletake ./cmd/doubletake
go build -o doubletake-ctl ./cmd/doubletake-ctl
sudo install -m755 doubletake doubletake-ctl /usr/local/bin/

# Install the plasmoid
kpackagetool6 -t Plasma/Applet -i plasmoid/

To update after changes:

kpackagetool6 -t Plasma/Applet -u plasmoid/

To remove:

kpackagetool6 -t Plasma/Applet -r org.doubletake.plasmoid

Usage

1. Start the daemon:

   doubletake -daemonize -creds ~/.config/doubletake/credentials.json &

2. Add "doubletake" to your system tray (right-click tray → Configure System Tray → Entries)

3. The icon shows:

   • Dim — idle, no active mirroring
   • Active — currently mirroring to a device

4. Click the tray icon to:

   • Discover AirPlay devices on your network
   • Connect to one or more devices from the list
   • Disconnect a specific device from its row button
   • Mute/Unmute mirrored audio for all active streams

5. Middle-click the icon for quick toggle (connect/disconnect).

Autostart

Create a systemd user service for the daemon:

# ~/.config/systemd/user/doubletake.service
[Unit]
Description=doubletake AirPlay Mirroring Daemon
After=graphical-session.target

[Service]
ExecStart=/usr/local/bin/doubletake -daemonize -creds %h/.config/doubletake/credentials.json
Restart=on-failure
RestartSec=5

[Install]
WantedBy=graphical-session.target

systemctl --user enable --now doubletake.service

Architecture

┌─────────────────┐     JSON/Unix socket      ┌──────────────────┐
│  Plasma Applet  │ ──── doubletake-ctl ────> │ doubletake       │
│  (QML/JS)       │                           │ (Go)             │
└─────────────────┘                           └──────────────────┘
                                                  │
                                                  v
                                              AirPlay protocol
                                              (mDNS, RTSP, FairPlay,
                                              H.264 streaming)

The applet runs doubletake-ctl as a subprocess to communicate with the daemon. The daemon manages the full AirPlay lifecycle (discovery, pairing, FairPlay, mirroring).