redesign the window with flatlaf

readme.md

@@ -28,7 +28,7 @@
  1. clone the official repository linked below using `git clone`.  
  2. `cd` into the directory and run `mvn clean package`.  
  3. you will find a runnable jar with dependencies in the `target/` folder.  
- 4. run the built jar file with `java -jar target/autosqueal-*-jar-with-dependencies.jar`.
+ 4. run the built jar file with `java -jar target/autosqueal-*.jar`.
 
 **macos .app bundle**  
  - on macos, run `mvn clean package -Pmac-app`: you will find `autosqueal.app` in `target/jpackage/`.  

src/main/java/wtf/beatrice/autosqueal/Main.java

@@ -8,9 +8,10 @@ import wtf.beatrice.autosqueal.config.AutoSquealConfig;
 import wtf.beatrice.autosqueal.config.ConfigStore;
 import wtf.beatrice.autosqueal.listener.KeyPressListener;
 import wtf.beatrice.autosqueal.ui.MainWindow;
+import wtf.beatrice.autosqueal.ui.ThemeManager;
+import wtf.beatrice.autosqueal.util.SystemUtil;
 
 import javax.swing.*;
-import javax.swing.UnsupportedLookAndFeelException;
 
 public class Main {
 
@@ -24,14 +25,24 @@ public class Main {
     public static void main(String[] args) {
         LOGGER.info("Hello world!");
 
-        config = new ConfigStore().load();
-        mainWindow = new MainWindow(config);
+        // macos window chrome: these must be set before AWT initializes,
+        // or they are ignored
+        if (SystemUtil.getHostSystem() == SystemUtil.OperatingSystem.MAC_OS) {
+            // follow the system appearance for the window title bars
+            System.setProperty("apple.awt.application.appearance", "system");
+            // name the app in the menu bar
+            System.setProperty("apple.awt.application.name", "autosqueal");
+        }
+
+        ConfigStore configStore = new ConfigStore();
+        config = configStore.load();
+        mainWindow = new MainWindow(config, configStore);
 
         // ⌘Q on macOS, the IDE stop button and signals all bypass
         // windowClosing: make cleanup run on every exit path instead
         Runtime.getRuntime().addShutdownHook(new Thread(mainWindow::cleanup, "autosqueal-shutdown"));
 
-        useSystemLookAndFeel();
+        ThemeManager.applySystemTheme();
         boolean hookRegistered = registerJNativeHook();
 
         // all Swing components must be created and updated on the EDT
@@ -43,14 +54,6 @@ public class Main {
         });
     }
 
-    private static void useSystemLookAndFeel() {
-        try {
-            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
-        } catch (ReflectiveOperationException | UnsupportedLookAndFeelException ex) {
-            LOGGER.warn("Could not set the system look and feel, using the default one", ex);
-        }
-    }
-
     public static boolean registerJNativeHook() {
         if (hookRegistered) {
             return true;

src/main/java/wtf/beatrice/autosqueal/ui/MainWindow.java

@@ -1,13 +1,16 @@
 package wtf.beatrice.autosqueal.ui;
 
 import com.github.kwhat.jnativehook.keyboard.NativeKeyEvent;
+import net.miginfocom.swing.MigLayout;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import wtf.beatrice.autosqueal.Main;
 import wtf.beatrice.autosqueal.config.AutoSquealConfig;
+import wtf.beatrice.autosqueal.config.ConfigStore;
 import wtf.beatrice.autosqueal.config.ScreenArea;
 import wtf.beatrice.autosqueal.controls.CursorMover;
 import wtf.beatrice.autosqueal.controls.RobotMouseTracker;
+import wtf.beatrice.autosqueal.controls.SingleStepMovementTask;
 import wtf.beatrice.autosqueal.listener.CursorMoveListener;
 import wtf.beatrice.autosqueal.util.RunnerUtil;
 import wtf.beatrice.autosqueal.util.SystemUtil;
@@ -17,69 +20,121 @@ import java.awt.*;
 import java.awt.desktop.QuitStrategy;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
+import java.awt.image.BaseMultiResolutionImage;
 import java.awt.image.BufferedImage;
 import java.io.IOException;
+import java.util.Date;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.TimeUnit;
 import java.util.function.Supplier;
 
-public class MainWindow
-{
-    private static final Logger LOGGER = LogManager.getLogger(MainWindow.class);
+public class MainWindow {
 
-    private static final int WINDOW_HEIGHT = 700;
-    private static final int WINDOW_WIDTH = 800;
+    private static final Logger LOGGER = LogManager.getLogger(MainWindow.class);
 
     private static final long AUTOMATION_START_DELAY_SECONDS = 1L;
     private static final long AWAY_POLL_INTERVAL_SECONDS = 1L;
 
-    private final JFrame frame = new JFrame();
-    private JButton toggleButton;
+    private static final Color RUNNING_COLOR = new Color(0x3F, 0xB9, 0x50);
 
     private final AutoSquealConfig config;
+    private final ConfigStore configStore;
 
     // the away detection tracks the user, not the automation: it lives from
     // the window's creation and is polled only while the automation runs
     private final RobotMouseTracker robotTracker;
     private final CursorMoveListener awayDetector;
 
-    /**
-     * Creates the window around the given settings: the components read
-     * them live, so a change applies without a restart.
-     */
-    public MainWindow(AutoSquealConfig config) {
-        this.config = config;
-        this.robotTracker = new RobotMouseTracker();
-        this.awayDetector = new CursorMoveListener(robotTracker, config);
-    }
+    private final JFrame frame = new JFrame();
 
-    private ScheduledExecutorService periodicScheduler;
-    private ExecutorService movementExecutor;
-    private CursorMover cursorMover;
+    // status
+    private JLabel statusPill;
+    private JLabel userStateLabel;
+    private JLabel nextMoveLabel;
+    private JLabel movesLabel;
+    private JButton toggleButton;
+    private JButton moveNowButton;
+
+    // settings
+    private JSpinner awaySpinner;
+    private JSpinner intervalSpinner;
+    private JSlider stepPauseSlider;
+    private JCheckBox clickCheckBox;
+    private JSpinner clickEverySpinner;
+    private JComboBox<ScreenArea> screenCombo;
+    private JCheckBox startAutoCheckBox;
+    private JCheckBox hotkeyCheckBox;
 
     private TrayIcon trayIcon;
     private MenuItem trayToggleItem;
 
-    /** Whether cleanup already ran, so it can safely be called twice. */
-    private boolean cleanedUp = false;
+    private ScheduledExecutorService periodicScheduler;
+    private ExecutorService movementExecutor;
+    private CursorMover cursorMover;
+    private ScheduledFuture<?> moverFuture;
+
+    /** When the movement cadence last ticked; drives the countdown. */
+    private volatile long lastMovementTickAt = 0L;
+
+    // status state: only touched on the EDT
+    private long sessionMoves = 0;
+    private String lastMoveAt = null;
+
+    /** Updates the status section once per second. */
+    private final javax.swing.Timer statusTimer = new javax.swing.Timer(1000, e -> refreshStatus());
+
+    /** Counts the automation's own movements, wherever they come from. */
+    private final CursorMover.Listener movementListener = new CursorMover.Listener() {
+        @Override
+        public void onTick() {
+            lastMovementTickAt = System.currentTimeMillis();
+        }
+
+        @Override
+        public void onMovementQueued(int destX, int destY, boolean click) {
+            SwingUtilities.invokeLater(() -> {
+                sessionMoves++;
+                lastMoveAt = String.format("%tT", new Date());
+            });
+        }
+    };
 
     /**
-     * Builds and shows the main window, and starts the automation.
-     * Must be called on the EDT.
+     * Creates the window around the given settings: the components read
+     * them live, so a change applies without a restart. The store is used
+     * to persist the settings as soon as the user changes them.
+     */
+    public MainWindow(AutoSquealConfig config, ConfigStore configStore) {
+        this.config = config;
+        this.configStore = configStore;
+        this.robotTracker = new RobotMouseTracker();
+        this.awayDetector = new CursorMoveListener(robotTracker, config);
+    }
+
+    /**
+     * Builds and shows the main window, and starts the automation if the
+     * settings say so. Must be called on the EDT.
      */
     public void init() {
 
-        frame.setSize(new Dimension(WINDOW_WIDTH, WINDOW_HEIGHT));
         frame.setTitle("autosqueal");
         frame.setResizable(false);
         frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
         frame.addWindowListener(new WindowAdapter() {
             @Override
             public void windowClosing(WindowEvent e) {
+                statusTimer.stop();
                 cleanup();
             }
+
+            @Override
+            public void windowActivated(WindowEvent e) {
+                // catch a system appearance change while the app was inactive
+                ThemeManager.reapplyIfSystemThemeChanged();
+            }
         });
 
         // ⌘Q on macOS defaults to calling System.exit(0) directly, which
@@ -93,26 +148,7 @@ public class MainWindow
             }
         }
 
-        toggleButton = new JButton();
-        toggleButton.setBounds(new Rectangle((WINDOW_WIDTH / 2) - 60, WINDOW_HEIGHT - 60, 120, 30));
-        toggleButton.addActionListener(e -> toggleRunning());
-        frame.add(toggleButton);
-
-        int bordersPx = 10;
-        int rescaleRateo = ((WINDOW_WIDTH - (2 * bordersPx)) * 100) / RunnerUtil.SCREEN_WIDTH;
-        int rescaleWidth = RunnerUtil.SCREEN_WIDTH * rescaleRateo / 100;
-        int rescaleHeight = RunnerUtil.SCREEN_HEIGHT * rescaleRateo / 100;
-        JLabel imageLabel = new JLabel(new ImageIcon(getScreenCapture(rescaleWidth, rescaleHeight)));
-        imageLabel.setBounds(new Rectangle(bordersPx, bordersPx, rescaleWidth, rescaleHeight));
-        frame.add(imageLabel);
-
-        Image preciseScreenshot = getPreciseScreenshot();
-        JLabel timestampLabel = new JLabel(new ImageIcon(preciseScreenshot));
-        timestampLabel.setBounds(new Rectangle(bordersPx, bordersPx + rescaleHeight + bordersPx, 100, 30));
-        frame.add(timestampLabel);
-
-        frame.setLayout(null);
-        frame.setVisible(true);
+        buildContent();
 
         if (SystemTray.isSupported()) {
             addTrayIcon();
@@ -122,35 +158,348 @@ public class MainWindow
             startAutomation();
         }
         updateToggleLabel();
+        refreshStatus();
+        statusTimer.start();
+
+        frame.pack();
+        frame.setLocationRelativeTo(null);
+        frame.setVisible(true);
     }
 
-    private Image getScreenCapture(int rescaleWidth, int rescaleHeight) {
+    // ── layout ──────────────────────────────────────────────────────────
 
-            Image fullImage = getScreenCapture();
-            return fullImage.getScaledInstance(rescaleWidth, rescaleHeight, Image.SCALE_FAST);
+    private void buildContent() {
+
+        MigLayout layout = new MigLayout("wrap 1, insets 16, gap 6", "[grow]");
+        JPanel root = new JPanel(layout);
+
+        root.add(buildHeader(), "growx");
+        root.add(buildStatusSection(), "growx");
+        root.add(buildSettingsSection(), "growx");
+        root.add(buildFooter(), "growx");
+
+        frame.setContentPane(root);
     }
 
-    public Image getPreciseScreenshot() {
+    private JPanel buildHeader() {
+        JPanel header = new JPanel(new MigLayout("insets 0, gap 0", "[][grow, right]"));
 
-        if(SystemUtil.getHostSystem().equals(SystemUtil.OperatingSystem.MAC_OS)) {
-            BufferedImage screenshot = getScreenCapture();
-            return screenshot.getSubimage(RunnerUtil.SCREEN_WIDTH - 100,0, 100, 30);
+        JLabel titleLabel = new JLabel("autosqueal");
+        titleLabel.setFont(titleLabel.getFont().deriveFont(20f));
+
+        JLabel subtitleLabel = new JLabel("moves the mouse only when you're away");
+        subtitleLabel.setForeground(UIManager.getColor("Label.disabledForeground"));
+
+        statusPill = new JLabel("○ paused");
+        statusPill.setForeground(UIManager.getColor("Label.disabledForeground"));
+
+        header.add(titleLabel, "cell 0 0, aligny top");
+        header.add(statusPill, "cell 1 0, aligny top");
+        header.add(subtitleLabel, "cell 0 1");
+        return header;
+    }
+
+    private JPanel buildStatusSection() {
+        JPanel status = new JPanel(new MigLayout("wrap 1, insets 10 14 14 14, gap 4"));
+        status.setBorder(BorderFactory.createTitledBorder("status"));
+
+        userStateLabel = new JLabel("you are here");
+        nextMoveLabel = new JLabel("—");
+        movesLabel = new JLabel("no moves yet");
+
+        toggleButton = new JButton("Start");
+        toggleButton.addActionListener(e -> toggleRunning());
+
+        moveNowButton = new JButton("Move now");
+        moveNowButton.setToolTipText("queues a single small movement, ignoring the away detection: to test permissions");
+        moveNowButton.addActionListener(e -> moveNow());
+
+        JPanel buttons = new JPanel(new MigLayout("insets 0, gap 8"));
+        buttons.add(toggleButton, "width 120:120:120, height 30:30:30");
+        buttons.add(moveNowButton);
+
+        status.add(userStateLabel);
+        status.add(nextMoveLabel);
+        status.add(movesLabel);
+        status.add(buttons, "gaptop 8");
+        return status;
+    }
+
+    private JPanel buildSettingsSection() {
+        JPanel settings = new JPanel(new MigLayout("wrap 2, insets 10 14 14 14, gap 6 12", "[][right]", ""));
+        settings.setBorder(BorderFactory.createTitledBorder("settings"));
+
+        // away detection
+        settings.add(new JLabel("Consider the user away after (seconds)"));
+        awaySpinner = new JSpinner(new SpinnerNumberModel(config.getAwayThresholdSeconds(),
+                AutoSquealConfig.AWAY_THRESHOLD_MIN_SECONDS, AutoSquealConfig.AWAY_THRESHOLD_MAX_SECONDS, 1));
+        awaySpinner.addChangeListener(e -> applySetting(() ->
+                config.setAwayThresholdSeconds(spinnerValue(awaySpinner))));
+        settings.add(awaySpinner, "width 90:90:90, wrap");
+
+        // movement cadence
+        settings.add(new JLabel("Move every (seconds)"));
+        intervalSpinner = new JSpinner(new SpinnerNumberModel(config.getMoveIntervalSeconds(),
+                AutoSquealConfig.MOVE_INTERVAL_MIN_SECONDS, AutoSquealConfig.MOVE_INTERVAL_MAX_SECONDS, 1));
+        intervalSpinner.addChangeListener(e -> {
+            applySetting(() -> config.setMoveIntervalSeconds(spinnerValue(intervalSpinner)));
+            rescheduleMoverInterval();
+        });
+        settings.add(intervalSpinner, "width 90:90:90, wrap");
+
+        // movement speed: the slider shows the speed, from slow (left) to
+        // fast (right) — internally it is the step pause, read upside down
+        int fastest = AutoSquealConfig.STEP_DELAY_MIN_MILLISECONDS;
+        int slowest = AutoSquealConfig.STEP_DELAY_MAX_MILLISECONDS;
+        settings.add(new JLabel("Movement speed"));
+        stepPauseSlider = new JSlider(fastest, slowest, slowest + fastest - config.getStepDelayMilliseconds());
+        stepPauseSlider.addChangeListener(e -> applySetting(() ->
+                config.setStepDelayMilliseconds(slowest + fastest - stepPauseSlider.getValue())));
+        settings.add(stepPauseSlider, "width 140:160:180, wrap");
+
+        // corner clicks
+        settings.add(new JLabel("Click the notification corner"));
+        clickCheckBox = new JCheckBox("", config.isClickEnabled());
+        clickCheckBox.addChangeListener(e -> applySetting(() -> config.setClickEnabled(clickCheckBox.isSelected())));
+        settings.add(clickCheckBox, "wrap");
+
+        settings.add(new JLabel("One corner click every (moves)"));
+        clickEverySpinner = new JSpinner(new SpinnerNumberModel(config.getClickEveryNMoves(),
+                AutoSquealConfig.CLICK_EVERY_MIN_MOVES, AutoSquealConfig.CLICK_EVERY_MAX_MOVES, 1));
+        clickEverySpinner.addChangeListener(e -> applySetting(() ->
+                config.setClickEveryNMoves(spinnerValue(clickEverySpinner))));
+        settings.add(clickEverySpinner, "width 90:90:90, wrap");
+        clickCheckBox.addChangeListener(e -> clickEverySpinner.setEnabled(clickCheckBox.isSelected()));
+        clickEverySpinner.setEnabled(clickCheckBox.isSelected());
+
+        // screen
+        settings.add(new JLabel("Travel to"));
+        screenCombo = new JComboBox<>(ScreenArea.values());
+        screenCombo.setRenderer(new DefaultListCellRenderer() {
+            @Override
+            public Component getListCellRendererComponent(JList<?> list, Object value, int index,
+                                                         boolean isSelected, boolean cellHasFocus) {
+                return super.getListCellRendererComponent(list, screenName((ScreenArea) value),
+                        index, isSelected, cellHasFocus);
+            }
+        });
+        screenCombo.setSelectedItem(config.getMovementScreen());
+        screenCombo.addActionListener(e -> applySetting(() ->
+                config.setMovementScreen((ScreenArea) screenCombo.getSelectedItem())));
+        settings.add(screenCombo, "width 140:140:140, wrap");
+
+        // startup
+        settings.add(new JLabel("Start the automation at launch"));
+        startAutoCheckBox = new JCheckBox("", config.isStartAutomatically());
+        startAutoCheckBox.addChangeListener(e -> applySetting(() ->
+                config.setStartAutomatically(startAutoCheckBox.isSelected())));
+        settings.add(startAutoCheckBox, "wrap");
+
+        // hotkey
+        settings.add(new JLabel("Global toggle hotkey"));
+        JPanel hotkeyPanel = new JPanel(new MigLayout("insets 0, gap 8", "[]push[]", ""));
+        hotkeyCheckBox = new JCheckBox("enabled", config.isHotkeyEnabled());
+        hotkeyCheckBox.addChangeListener(e -> applySetting(() ->
+                config.setHotkeyEnabled(hotkeyCheckBox.isSelected())));
+        String hotkey = "[" + NativeKeyEvent.getKeyText(NativeKeyEvent.VC_CONTROL) + "]"
+                + "[" + NativeKeyEvent.getKeyText(NativeKeyEvent.VC_ALT) + "]";
+        hotkeyPanel.add(hotkeyCheckBox);
+        hotkeyPanel.add(new JLabel(hotkey));
+        settings.add(hotkeyPanel, "wrap");
+
+        return settings;
+    }
+
+    private String screenName(ScreenArea area) {
+        return area == ScreenArea.ALL ? "all screens" : "the main screen";
+    }
+
+    private JComponent buildFooter() {
+        JLabel footer = new JLabel("settings are saved as they change · ⌘Q or the tray icon quits");
+        footer.setFont(footer.getFont().deriveFont(11f));
+        footer.setForeground(UIManager.getColor("Label.disabledForeground"));
+        footer.setHorizontalAlignment(SwingConstants.CENTER);
+        return footer;
+    }
+
+    // ── status ──────────────────────────────────────────────────────────
+
+    private void refreshStatus() {
+        boolean away = awayDetector.isUserAway();
+
+        userStateLabel.setText(away ? "● you are away" : "● you are here");
+        userStateLabel.setForeground(away ? RUNNING_COLOR : UIManager.getColor("Label.foreground"));
+
+        boolean running = cursorMover != null;
+        if (!running) {
+            nextMoveLabel.setText("automation is paused");
+        } else if (robotTracker.isMoving()) {
+            nextMoveLabel.setText("moving…");
+        } else {
+            long nextAt = lastMovementTickAt + config.getMoveIntervalSeconds() * 1000L;
+            long seconds = Math.max(0L, (nextAt - System.currentTimeMillis()) / 1000L);
+            nextMoveLabel.setText((away ? "next move in " : "next attempt in ") + seconds + "s");
         }
 
-        return null;
+        movesLabel.setText(sessionMoves + " moves this session"
+                + (lastMoveAt == null ? "" : " · last at " + lastMoveAt));
+
+        updateToggleLabel();
     }
 
-    public BufferedImage getScreenCapture() {
-        try {
-            Robot robot = new Robot();
-            return robot.createScreenCapture(new Rectangle(RunnerUtil.SCREEN_WIDTH, RunnerUtil.SCREEN_HEIGHT));
-        } catch (AWTException e) {
-            LOGGER.error("Robot initialization error", e);
+    private void updateToggleLabel() {
+        if (toggleButton == null) {
+            // the window is not initialized yet
+            return;
         }
 
-        return null;
+        boolean running = cursorMover != null;
+        toggleButton.setText(running ? "Pause" : "Start");
+        moveNowButton.setEnabled(running);
+        statusPill.setText(running ? "● running" : "○ paused");
+        statusPill.setForeground(running ? RUNNING_COLOR : UIManager.getColor("Label.disabledForeground"));
+
+        if (trayToggleItem != null) {
+            trayToggleItem.setLabel(running ? "Pause" : "Start");
+        }
     }
 
+    // ── settings plumbing ───────────────────────────────────────────────
+
+    /** Applies a setting change and persists it right away. */
+    private void applySetting(Runnable setter) {
+        setter.run();
+        configStore.save(config);
+    }
+
+    private static int spinnerValue(JSpinner spinner) {
+        return (Integer) spinner.getValue();
+    }
+
+    /**
+     * Re-schedules the movement cadence with the current interval, without
+     * stopping the automation: the away detection keeps running untouched.
+     */
+    private void rescheduleMoverInterval() {
+        if (cursorMover == null || periodicScheduler == null) {
+            return;
+        }
+
+        if (moverFuture != null) {
+            moverFuture.cancel(false);
+        }
+        long interval = config.getMoveIntervalSeconds();
+        moverFuture = periodicScheduler.scheduleWithFixedDelay(cursorMover, interval, interval, TimeUnit.SECONDS);
+    }
+
+    // ── automation ──────────────────────────────────────────────────────
+
+    /** Queues a single small movement, ignoring the away detection: a test. */
+    private void moveNow() {
+        if (movementExecutor == null) {
+            return;
+        }
+
+        Rectangle bounds = RunnerUtil.screenBounds(ScreenArea.PRIMARY);
+        Point start = MouseInfo.getPointerInfo().getLocation();
+
+        int destX = Math.min(bounds.x + bounds.width - 20, start.x + 80);
+        int destY = Math.max(bounds.y + 20, start.y - 60);
+        if (destX == start.x && destY == start.y) {
+            // no visible movement otherwise
+            destX += 40;
+        }
+
+        // the test move ignores the away detection, or it would be
+        // abandoned at the first poll with the user present
+        SingleStepMovementTask movement = new SingleStepMovementTask(
+                robotTracker, destX, destY, false, () -> true,
+                config.getStepDelayMilliseconds(), start);
+        movementExecutor.execute(movement);
+
+        sessionMoves++;
+        lastMoveAt = String.format("%tT", new Date());
+    }
+
+    private void startAutomation() {
+        LOGGER.info("Starting automation");
+
+        // periodic work (polling and movement cadence) on a classic scheduler,
+        // so that it can be scheduled with fixed delays
+        periodicScheduler = Executors.newScheduledThreadPool(2, runnable -> {
+            Thread thread = new Thread(runnable, "autosqueal-scheduler");
+            thread.setDaemon(true);
+            return thread;
+        });
+
+        // movements and clicks run on virtual threads: they mostly sleep,
+        // and blocking them costs nothing
+        movementExecutor = Executors.newThreadPerTaskExecutor(
+                Thread.ofVirtual().name("autosqueal-movement-").factory());
+
+        // away-detection: polls the cursor position and ignores the movements
+        // the app performs itself, as reported by the robot mouse tracker.
+        // the automation only moves the mouse when the user is away.
+        periodicScheduler.scheduleWithFixedDelay(awayDetector, 0L, AWAY_POLL_INTERVAL_SECONDS, TimeUnit.SECONDS);
+
+        // the movement bounds are read again at every movement, so a change
+        // of setting applies from the next movement without a restart. the
+        // corner click always aims at the main screen, whatever screens the
+        // cursor may otherwise travel to.
+        Supplier<Rectangle> movementBounds = () -> RunnerUtil.screenBounds(config.getMovementScreen());
+        Supplier<Rectangle> primaryScreenBounds = () -> RunnerUtil.screenBounds(ScreenArea.PRIMARY);
+
+        cursorMover = new CursorMover(movementExecutor, robotTracker, awayDetector::isUserAway,
+                config, movementBounds, primaryScreenBounds);
+        cursorMover.setListener(movementListener);
+        lastMovementTickAt = System.currentTimeMillis();
+
+        moverFuture = periodicScheduler.scheduleWithFixedDelay(cursorMover,
+                AUTOMATION_START_DELAY_SECONDS,
+                config.getMoveIntervalSeconds(),
+                TimeUnit.SECONDS);
+    }
+
+    private void stopAutomation() {
+        LOGGER.info("Stopping automation");
+
+        if (moverFuture != null) {
+            moverFuture.cancel(false);
+            moverFuture = null;
+        }
+
+        if (periodicScheduler != null) {
+            periodicScheduler.shutdownNow();
+            periodicScheduler = null;
+        }
+
+        if (movementExecutor != null) {
+            // interrupts the in-flight movement threads, too
+            movementExecutor.shutdownNow();
+            movementExecutor = null;
+        }
+
+        cursorMover = null;
+    }
+
+    /**
+     * Toggles the automation on or off. Safe to call from any thread: the actual
+     * work is always marshalled to the EDT, since it touches Swing components.
+     */
+    public void toggleRunning() {
+        SwingUtilities.invokeLater(() -> {
+            if (cursorMover == null) {
+                startAutomation();
+            } else {
+                stopAutomation();
+            }
+            updateToggleLabel();
+            refreshStatus();
+        });
+    }
+
+    // ── tray ─────────────────────────────────────────────────────────────
+
     /**
      * Adds a menu bar icon with a toggle entry and a quit entry, so the
      * automation can be controlled even with the window closed.
@@ -164,11 +513,13 @@ public class MainWindow
 
         MenuItem quitItem = new MenuItem("Quit");
         quitItem.addActionListener(e -> {
+            statusTimer.stop();
             cleanup();
             System.exit(0);
         });
         menu.add(quitItem);
 
+        // multi-resolution, so the icon stays crisp on HiDPI screens
         trayIcon = new TrayIcon(createTrayIconImage(), "autosqueal", menu);
         trayIcon.setImageAutoSize(true);
 
@@ -181,24 +532,47 @@ public class MainWindow
         }
     }
 
-    /** Draws the little mouse pointer used as tray icon. */
+    /** Draws the mouse pointer used as tray icon, at the given pixel size. */
     private Image createTrayIconImage() {
-        BufferedImage image = new BufferedImage(16, 16, BufferedImage.TYPE_INT_ARGB);
+        return new BaseMultiResolutionImage(drawPointer(16), drawPointer(32), drawPointer(64));
+    }
+
+    private BufferedImage drawPointer(int size) {
+        BufferedImage image = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
+        double scale = size / 16.0;
 
         int[] xPoints = {3, 3, 6, 8, 10, 8, 12};
         int[] yPoints = {1, 12, 8, 12, 11, 7, 7};
+        int[] scaledX = scale(xPoints, scale);
+        int[] scaledY = scale(yPoints, scale);
 
         Graphics2D graphics = image.createGraphics();
-        graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
-        graphics.setColor(Color.BLACK);
-        graphics.fillPolygon(xPoints, yPoints, xPoints.length);
-        graphics.setColor(Color.WHITE);
-        graphics.drawPolygon(xPoints, yPoints, xPoints.length);
-        graphics.dispose();
-
+        try {
+            graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+            graphics.setColor(Color.BLACK);
+            graphics.fillPolygon(scaledX, scaledY, scaledX.length);
+            graphics.setColor(Color.WHITE);
+            graphics.setStroke(new BasicStroke((float) Math.max(1.0, scale)));
+            graphics.drawPolygon(scaledX, scaledY, scaledX.length);
+        } finally {
+            graphics.dispose();
+        }
         return image;
     }
 
+    private static int[] scale(int[] points, double factor) {
+        int[] scaled = new int[points.length];
+        for (int i = 0; i < points.length; i++) {
+            scaled[i] = (int) Math.round(points[i] * factor);
+        }
+        return scaled;
+    }
+
+    // ── shutdown ─────────────────────────────────────────────────────────
+
+    /** Whether cleanup already ran, so it can safely be called twice. */
+    private boolean cleanedUp = false;
+
     /**
      * Stops the automation and releases everything the app is holding.
      * Safe to call more than once, from any thread: window closing and
@@ -211,6 +585,7 @@ public class MainWindow
         cleanedUp = true;
 
         LOGGER.info("Shutting down...");
+        statusTimer.stop();
         stopAutomation();
 
         if (trayIcon != null) {
@@ -221,6 +596,8 @@ public class MainWindow
         Main.unregisterJNativeHook();
     }
 
+    // ── permissions help ──────────────────────────────────────────────────
+
     /**
      * Explains which permissions the app needs and offers to open each pane.
      * the hook is retried on demand, so the app can start working without a
@@ -236,8 +613,7 @@ public class MainWindow
                             + "   versions — lets the app listen for the ctrl+alt hotkey.\n"
                             + "   if the pane shows a separate \"events\" switch for autosqueal, turn\n"
                             + "   that on too: it is what lets the app move the mouse and click.\n\n"
-                            + "2. screen recording — lets the app take the screenshot shown\n"
-                            + "   in the main window.\n\n"
+                            + "2. screen recording — lets the app read the cursor position.\n\n"
                             + "open each pane, unlock it, and make sure autosqueal is listed and switched on.\n"
                             + "if it is already listed, remove it with the minus button and re-add it:\n"
                             + "every rebuild looks like a different app to the system.\n"
@@ -288,90 +664,4 @@ public class MainWindow
     public void notifyKeyboardActivity() {
         awayDetector.reportKeyboardActivity();
     }
-
-    /**
-     * Toggles the automation on or off. Safe to call from any thread: the actual
-     * work is always marshalled to the EDT, since it touches Swing components.
-     */
-    public void toggleRunning() {
-        SwingUtilities.invokeLater(() -> {
-            if (cursorMover == null) {
-                startAutomation();
-            } else {
-                stopAutomation();
-            }
-            updateToggleLabel();
-        });
-    }
-
-    private void startAutomation() {
-        LOGGER.info("Starting automation");
-
-        // periodic work (polling and movement cadence) on a classic scheduler,
-        // so that it can be scheduled with fixed delays
-        periodicScheduler = Executors.newScheduledThreadPool(2, runnable -> {
-            Thread thread = new Thread(runnable, "autosqueal-scheduler");
-            thread.setDaemon(true);
-            return thread;
-        });
-
-        // movements and clicks run on virtual threads: they mostly sleep,
-        // and blocking them costs nothing
-        movementExecutor = Executors.newThreadPerTaskExecutor(
-                Thread.ofVirtual().name("autosqueal-movement-").factory());
-
-        // away-detection: polls the cursor position and ignores the movements
-        // the app performs itself, as reported by the robot mouse tracker.
-        // the automation only moves the mouse when the user is away.
-        periodicScheduler.scheduleWithFixedDelay(awayDetector, 0L, AWAY_POLL_INTERVAL_SECONDS, TimeUnit.SECONDS);
-
-        // the movement bounds are read again at every movement, so a change
-        // of setting applies from the next movement without a restart. the
-        // corner click always aims at the main screen, whatever screens the
-        // cursor may otherwise travel to.
-        Supplier<Rectangle> movementBounds = () -> RunnerUtil.screenBounds(config.getMovementScreen());
-        Supplier<Rectangle> primaryScreenBounds = () -> RunnerUtil.screenBounds(ScreenArea.PRIMARY);
-
-        cursorMover = new CursorMover(movementExecutor, robotTracker, awayDetector::isUserAway,
-                config, movementBounds, primaryScreenBounds);
-        periodicScheduler.scheduleWithFixedDelay(cursorMover,
-                AUTOMATION_START_DELAY_SECONDS,
-                config.getMoveIntervalSeconds(),
-                TimeUnit.SECONDS);
-    }
-
-    private void stopAutomation() {
-        LOGGER.info("Stopping automation");
-
-        if (periodicScheduler != null) {
-            periodicScheduler.shutdownNow();
-            periodicScheduler = null;
-        }
-
-        if (movementExecutor != null) {
-            // interrupts the in-flight movement threads, too
-            movementExecutor.shutdownNow();
-            movementExecutor = null;
-        }
-
-        cursorMover = null;
-    }
-
-    private void updateToggleLabel() {
-        if (toggleButton == null) {
-            // the window is not initialized yet
-            return;
-        }
-
-        String hotkey = "[" + NativeKeyEvent.getKeyText(NativeKeyEvent.VC_CONTROL) + "]"
-                + "[" + NativeKeyEvent.getKeyText(NativeKeyEvent.VC_ALT) + "]";
-
-        String label = (cursorMover == null ? "Start " : "Stop ") + hotkey;
-
-        toggleButton.setText(label);
-        if (trayToggleItem != null) {
-            trayToggleItem.setLabel(label);
-        }
-    }
-
 }

src/main/java/wtf/beatrice/autosqueal/ui/ThemeManager.java

@@ -0,0 +1,89 @@
+package wtf.beatrice.autosqueal.ui;
+
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.themes.FlatMacDarkLaf;
+import com.formdev.flatlaf.themes.FlatMacLightLaf;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import wtf.beatrice.autosqueal.util.SystemUtil;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * Keeps the look and feel in sync with the system appearance.
+ *
+ * On macOS the dark or light mode is read from the system, so the app
+ * follows the user's taste without any setting of its own; everywhere
+ * else the light theme is used. The check runs again every time the
+ * window is activated, so switching the system appearance while the app
+ * runs is picked up without a restart.
+ */
+public final class ThemeManager {
+
+    private static final Logger LOGGER = LogManager.getLogger(ThemeManager.class);
+
+    /** The theme currently applied, so a change of system appearance is noticed. */
+    private static boolean darkThemeApplied = false;
+
+    private ThemeManager() {
+        throw new AssertionError("The ThemeManager class is not intended to be instantiated.");
+    }
+
+    /** Applies the theme matching the current system appearance. */
+    public static void applySystemTheme() {
+        boolean systemDark = isSystemDarkMode();
+        applyTheme(systemDark);
+    }
+
+    /** Re-checks the system appearance, and switches theme if it changed. */
+    public static void reapplyIfSystemThemeChanged() {
+        boolean systemDark = isSystemDarkMode();
+        if (systemDark != darkThemeApplied) {
+            applyTheme(systemDark);
+        }
+    }
+
+    private static void applyTheme(boolean dark) {
+        try {
+            FlatLaf.setup(dark ? new FlatMacDarkLaf() : new FlatMacLightLaf());
+            darkThemeApplied = dark;
+        } catch (RuntimeException ex) {
+            // a broken theme must never keep the app from starting
+            LOGGER.error("Could not apply the flat theme, using the default look and feel", ex);
+        }
+    }
+
+    /**
+     * Whether the system is in dark mode. On macOS, the appearance lives
+     * in AppleInterfaceStyle, which simply does not exist while the system
+     * is in light mode.
+     */
+    private static boolean isSystemDarkMode() {
+        if (SystemUtil.getHostSystem() != SystemUtil.OperatingSystem.MAC_OS) {
+            return false;
+        }
+
+        try {
+            ProcessBuilder builder = new ProcessBuilder(
+                    "defaults", "read", "NSGlobalDomain", "AppleInterfaceStyle");
+            builder.redirectErrorStream(true);
+            Process process = builder.start();
+
+            String style;
+            try (BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(process.getInputStream(), StandardCharsets.UTF_8))) {
+                style = reader.readLine();
+            }
+
+            boolean exited = process.waitFor() == 0;
+            return exited && "Dark".equalsIgnoreCase(style == null ? "" : style.trim());
+        } catch (IOException | InterruptedException ex) {
+            // if the check fails, prefer the light theme
+            LOGGER.debug("Could not read the system appearance, assuming light", ex);
+            return false;
+        }
+    }
+}

src/main/java/wtf/beatrice/autosqueal/util/RunnerUtil.java

@@ -10,9 +10,6 @@ public class RunnerUtil {
         throw new AssertionError("The RunnerUtil class is not intended to be instantiated.");
     }
 
-    public static final int SCREEN_HEIGHT = Toolkit.getDefaultToolkit().getScreenSize().height;
-    public static final int SCREEN_WIDTH = Toolkit.getDefaultToolkit().getScreenSize().width;
-
     /**
      * The bounds of the screens the cursor may travel to, according to the
      * given setting. Fetched on every call, so that a change of setting, or