Rework TUI: single-threaded curses, scrollback buffer, server menu

- All curses drawing on the main thread; stdin polled together with the
  ZMQ sockets, Ctrl-C only sets a flag
- Output kept in a 2000-line buffer and redrawn from it, so resizes keep
  the history; PgUp/PgDn and mouse wheel scroll it
- Messages without trailing newline continue the current line (status
  table columns arrive as separate messages)
- Too-small terminal shows a warning instead of exiting
- Start without arguments shows a server selection menu
- Colors on the terminal default background; version 0.9.0

README.md

@@ -34,11 +34,22 @@ duel = 10.13.12.93:28961
 ## Usage
 
 ```bash
+qlpycon                                            # pick a server from a menu
 qlpycon ffa                                        # connect by name
 qlpycon --host tcp://10.13.12.93:28960 --password secret   # connect directly
 qlpycon --list                                     # list configured servers
 ```
 
+Without arguments, qlpycon shows the servers from `[servers]` and connects to the one you select (Up/Down or j/k, Enter or the number key; q quits). If no servers are configured it connects to `[connection] host`.
+
+**Keys in the console:**
+- `Enter`: send the command
+- `Tab`: cycle autocomplete suggestions
+- `Up`/`Down`: command history
+- `PgUp`/`PgDn` or mouse wheel: scroll the output back and forth (the last 2000 lines are kept)
+- Hold `Shift` while selecting text with the mouse (the wheel is reported to qlpycon)
+- `Ctrl-C` twice: quit
+
 **Options:**
 - `--host URI` — ZMQ RCON endpoint
 - `--password PASS` — RCON password (or set `QLPYCON_PASSWORD` env var)
@@ -56,6 +67,7 @@ qlpycon --list                                     # list configured servers
 - Tab autocomplete for cvars and commands with fuzzy matching
 - Argument suggestions for 25+ commands (bot names, maps, gametypes)
 - Command history (↑/↓)
+- Output scrollback (PgUp/PgDn) that survives terminal resizes
 
 ## Architecture
 

lib/constants.py

@@ -5,7 +5,7 @@ Configuration and constants for QLPyCon
 
 import re
 
-VERSION = "0.8.1"
+VERSION = "0.9.0"
 
 # Pattern matching
 COLOR_CODE_PATTERN = re.compile(r'\^\d')  # Quake color codes (^0-^9)
@@ -21,10 +21,13 @@ RESPAWN_DELAY = 3.0  # Seconds before players respawn after death
 STATS_CONNECTION_DELAY = 0.5  # Initial stats connection delay
 
 # UI dimensions
+MIN_ROWS = 20
+MIN_COLS = 80
 INFO_WINDOW_HEIGHT = 12
 INFO_WINDOW_Y = 2
 OUTPUT_WINDOW_Y = 14
 INPUT_WINDOW_HEIGHT = 2
+OUTPUT_SCROLLBACK_LINES = 2000  # Output lines kept for PgUp/PgDn and redraw after resize
 
 # Event deduplication
 MAX_RECENT_EVENTS = 10

lib/network.py

@@ -89,10 +89,6 @@ class RconConnection:
         self.socket.send(command)
         logger.info(f'Sent command: {command}')
 
-    def poll(self, timeout):
-        """Poll for messages"""
-        return self.socket.poll(timeout)
-
     def recv_message(self):
         """Receive a message (non-blocking)"""
         try:

lib/settings.py

@@ -173,6 +173,7 @@ def create_example_config():
     config_content = """# qlpycon.conf
 # Edit this file as needed.
 #
+# Pick from a menu:        qlpycon
 # Connect by server name:  qlpycon ffa
 # Connect directly:        qlpycon --host tcp://1.2.3.4:28960 --password secret
 # List servers:            qlpycon --list

main.py

@@ -14,14 +14,13 @@ import zmq
 import signal
 import sys
 import os
-import threading
 
 from lib.constants import VERSION, DEFAULT_HOST, POLL_TIMEOUT, QUIT_CONFIRM_TIMEOUT, RESPAWN_DELAY, MAX_COMMAND_HISTORY
 from lib.state import GameState
 from lib.network import RconConnection, StatsConnection
 from lib.parser import EventParser
 from lib.formatter import format_message, format_chat_message, format_powerup_message, strip_color_codes
-from lib.ui import UIManager
+from lib.ui import UIManager, select_server
 from lib.settings import ConfigLoader
 
 # Pre-compiled regex patterns
@@ -45,34 +44,40 @@ all_json_logger.setLevel(logging.DEBUG)
 unknown_json_logger = logging.getLogger('unknown_json')
 unknown_json_logger.setLevel(logging.DEBUG)
 
-# Global flag for quit confirmation (thread-safe)
+# Ctrl-C state: the signal handler only records the press, the main loop
+# reacts to it, so no screen drawing happens inside a signal handler.
+ctrl_c_pressed = False
 quit_confirm_time = None
-quit_confirm_lock = threading.Lock()
 
 # Configurable timeouts (set from config in __main__)
 _QUIT_CONFIRM_TIMEOUT = QUIT_CONFIRM_TIMEOUT
 _RESPAWN_DELAY = RESPAWN_DELAY
 
-# Global shutdown flag (set by signal_handler, checked by main_loop)
+# Global shutdown flag (set by handle_ctrl_c, checked by main_loop)
 shutdown_requested = False
 
 def signal_handler(sig, frame):
-    """Handle Ctrl+C with confirmation"""
+    """Record Ctrl+C; force exit if the graceful shutdown already started"""
-    global quit_confirm_time, shutdown_requested
+    global ctrl_c_pressed
-
-    current_time = time.time()
-
-    with quit_confirm_lock:
     if shutdown_requested:
         # Third Ctrl-C: last-resort forced exit
         curses.endwin()
         os._exit(0)
-        elif quit_confirm_time is None or (current_time - quit_confirm_time) > _QUIT_CONFIRM_TIMEOUT:
+    ctrl_c_pressed = True
-            # First Ctrl-C or timeout expired
+
+
+def handle_ctrl_c():
+    """Ask for confirmation on the first Ctrl-C, quit on the second one within the timeout"""
+    global ctrl_c_pressed, quit_confirm_time, shutdown_requested
+    if not ctrl_c_pressed:
+        return
+    ctrl_c_pressed = False
+
+    current_time = time.time()
+    if quit_confirm_time is None or (current_time - quit_confirm_time) > _QUIT_CONFIRM_TIMEOUT:
         logger.warning(f"^1^8Press Ctrl-C again within {_QUIT_CONFIRM_TIMEOUT:.0f} seconds to quit^0")
         quit_confirm_time = current_time
     else:
-            # Second Ctrl-C within timeout: request graceful shutdown
         logger.warning("^1^8Quittin'^0")
         shutdown_requested = True
 
@@ -130,10 +135,9 @@ def handle_stats_connection(message):
 
     return stats_port, stats_password
 
-def handle_user_input(input_queue, rcon, ui):
+def handle_user_input(ui, rcon):
-    """Process user command input"""
+    """Read pending keys and send the commands the user submitted"""
-    while not input_queue.empty():
+    for command in ui.process_input():
-        command = input_queue.get()
         logger.info(f'Sending command: {repr(command.strip())}')
 
         # Display command with timestamp
@@ -310,7 +314,11 @@ def parse_player_events(message, game_state, ui):
     return False
 
 def main_loop(screen, args):
-    """Main application loop"""
+    """
+    Main application loop.
+    Runs single-threaded: ZMQ sockets and the terminal (stdin) are polled together,
+    so all curses drawing happens here and never from another thread.
+    """
 
     # Setup signal handler for Ctrl+C with confirmation
     signal.signal(signal.SIGINT, signal_handler)
@@ -331,8 +339,9 @@ def main_loop(screen, args):
     unknown_json_logger.propagate = False
 
     # Initialize components
-    ui = UIManager(screen, args.host, args.max_history)
     game_state = GameState()
+    ui = UIManager(screen, args.title, args.max_history,
+                   player_names_provider=lambda: game_state.player_tracker.get_player_names())
 
     # Setup logging to output window
     log_handler = ui.setup_logging()
@@ -345,9 +354,6 @@ def main_loop(screen, args):
             lib_logger.addHandler(log_handler)
         lib_logger.setLevel(logger.level)
 
-    # Setup input queue
-    input_queue = ui.setup_input_queue(player_names_provider=lambda: game_state.player_tracker.get_player_names())
-
     # Display startup messages
     ui.print_message(f"*** QL pyCon Version {VERSION} starting ***\n")
     ui.print_message(f"zmq python bindings {zmq.__version__}, libzmq version {zmq.zmq_version()}\n")
@@ -357,6 +363,12 @@ def main_loop(screen, args):
     rcon = RconConnection(args.host, args.password, args.identity)
     rcon.connect()
 
+    # One poller wakes the loop on RCON data, connection events or a key press
+    poller = zmq.Poller()
+    poller.register(rcon.socket, zmq.POLLIN)
+    poller.register(rcon.monitor, zmq.POLLIN)
+    poller.register(sys.stdin, zmq.POLLIN)
+
     stats_conn = None
     stats_port = None
     stats_password = None
@@ -381,8 +393,10 @@ def main_loop(screen, args):
     # Main event loop with resource cleanup
     try:
         while not shutdown_requested:
-            # Poll RCON socket
+            # Wait for RCON data, a connection event, a stats event or a key press
-            event = rcon.poll(POLL_TIMEOUT)
+            ready = dict(poller.poll(POLL_TIMEOUT))
+
+            handle_ctrl_c()
 
             # Check monitor for connection events
             monitor_event = rcon.check_monitor()
@@ -398,13 +412,14 @@ def main_loop(screen, args):
                 timestamp = time.strftime('%H:%M:%S')
                 ui.print_message(f"^3[^7{timestamp}^3] ^8^1Disconnected from server - waiting for reconnect...^0^7\n")
                 if stats_conn is not None:
+                    poller.unregister(stats_conn.socket)
                     stats_conn.close()
                     stats_conn = None
                 stats_port = None
                 stats_password = None
 
             # Handle user input
-            handle_user_input(input_queue, rcon, ui)
+            handle_user_input(ui, rcon)
 
             # Poll stats stream if connected
             stats_check_counter = handle_stats_stream(stats_conn, stats_check_counter, event_parser, ui, game_state)
@@ -413,7 +428,7 @@ def main_loop(screen, args):
             handle_player_respawns(game_state, ui)
 
             # Process RCON messages
-            if event > 0:
+            if rcon.socket in ready:
                 logger.debug('Socket has data available')
                 msg_count = 0
 
@@ -478,6 +493,7 @@ def main_loop(screen, args):
 
                             stats_conn = StatsConnection(host_ip, stats_port, stats_password)
                             stats_conn.connect()
+                            poller.register(stats_conn.socket, zmq.POLLIN)
 
                             ui.print_message("Stats stream connected - ready for game events\n")
 
@@ -594,6 +610,14 @@ if __name__ == '__main__':
                 print(f'  {name:<12} {host}')
         sys.exit(0)
 
+    # No server name and no --host: let the user pick from the configured servers
+    if args.server is None and args.host is None:
+        servers = config.get_servers()
+        if servers:
+            args.server = curses.wrapper(select_server, servers)
+            if args.server is None:
+                sys.exit(0)
+
     # Resolve host and password
     if args.server:
         host, password = config.get_server(args.server)
@@ -603,10 +627,12 @@ if __name__ == '__main__':
             sys.exit(1)
         args.host = args.host or host
         args.password = args.password or password
+        args.title = f'Quake Live PyCon: {args.server} ({args.host})'
     else:
         args.host = args.host or config.get_host() or DEFAULT_HOST
         if not args.host.startswith('tcp://'):
             args.host = f'tcp://{args.host}'
         args.password = args.password or config.get_password()
+        args.title = f'Quake Live PyCon: {args.host}'
 
     curses.wrapper(main_loop, args)

qlpycon.conf.example

@@ -1,6 +1,7 @@
 # qlpycon.conf
 # Edit this file as needed.
 #
+# Pick from a menu:        qlpycon
 # Connect by server name:  qlpycon ffa
 # Connect directly:        qlpycon --host tcp://1.2.3.4:28960 --password secret
 # List servers:            qlpycon --list