NetDesk 1.5.0 — source release
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'rust/api.dart' as nd;
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import 'theme.dart';
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/// "Allow remote control" — the Android HOST role.
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///
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/// Turns this device into a NetDesk host (like RustDesk): once the user grants
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/// screen capture and enables the accessibility service, a remote viewer can see
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/// and control it. Talks to the native side over the `space.netdesk/host`
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/// MethodChannel (see MainActivity.kt / HostService.kt).
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///
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/// Preview: screen capture + the controls are live; the remote-connection wiring
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/// (register by Partner ID, send the encrypted H.264 to a viewer) lands next.
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class HostScreen extends StatefulWidget {
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const HostScreen({super.key});
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@override
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State<HostScreen> createState() => _HostScreenState();
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}
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class _HostScreenState extends State<HostScreen> with WidgetsBindingObserver {
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static const _host = MethodChannel('space.netdesk/host');
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static const _frameChannel = EventChannel('space.netdesk/frames');
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static const _wsUrl = 'wss://netdesk.space/ws';
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bool _running = false;
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bool _accessibility = false;
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bool _hideIcon = false;
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bool _unattended = false;
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int _frames = 0;
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bool _busy = false;
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// Rust host session.
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BigInt? _handle;
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String _id = '';
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String _password = '';
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bool _viewerConnected = false;
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StreamSubscription<dynamic>? _frameSub;
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StreamSubscription<nd.NdHostEvent>? _eventSub;
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// Viewer-mouse -> touch gesture interpretation (coords are in capture space;
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// MainActivity scales to the real display before injecting).
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int _btns = 0;
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double _downX = 0, _downY = 0, _lastX = 0, _lastY = 0;
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int _downMs = 0;
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@override
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void initState() {
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super.initState();
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WidgetsBinding.instance.addObserver(this);
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_refresh();
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}
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@override
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void dispose() {
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WidgetsBinding.instance.removeObserver(this);
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_frameSub?.cancel();
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_eventSub?.cancel();
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super.dispose();
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}
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@override
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void didChangeAppLifecycleState(AppLifecycleState state) {
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if (state == AppLifecycleState.resumed) _refresh();
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}
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Future<T?> _call<T>(String method, [Map<String, dynamic>? args]) async {
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try {
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return await _host.invokeMethod<T>(method, args);
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} catch (_) {
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return null;
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}
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}
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Future<void> _refresh() async {
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final running = await _call<bool>('isHostRunning') ?? false;
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final acc = await _call<bool>('hasAccessibility') ?? false;
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final hide = await _call<bool>('isIconHidden') ?? false;
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final un = await _call<bool>('isUnattended') ?? false;
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final frames = await _call<int>('lastFrameCount') ?? 0;
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if (mounted) {
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setState(() {
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_running = running;
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_accessibility = acc;
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_hideIcon = hide;
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_unattended = un;
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_frames = frames;
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});
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}
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}
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Future<void> _toggleHost() async {
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setState(() => _busy = true);
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if (_running) {
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await _stopHostFull();
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} else {
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await _startHostFull();
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}
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if (mounted) setState(() => _busy = false);
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}
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/// Load the persisted host id + unattended password, generating them once.
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Future<void> _loadCreds() async {
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var id = await _call<String>('getHostId') ?? '';
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var pw = await _call<String>('getHostPassword') ?? '';
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if (id.isEmpty || pw.isEmpty) {
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id = nd.hostGenId();
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pw = nd.hostGenPassword();
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await _call('setHostCreds', {'id': id, 'password': pw});
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}
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if (mounted) {
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setState(() {
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_id = id;
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_password = pw;
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});
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}
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}
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Future<void> _startHostFull() async {
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await _loadCreds();
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// 1) screen-capture consent -> HostService starts encoding.
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final ok = await _call<bool>('startHost') ?? false;
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if (!ok) {
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await _refresh();
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return;
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}
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// 2) wait for the encoder to report a capture size.
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int w = 0, h = 0;
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for (var i = 0; i < 30; i++) {
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await Future.delayed(const Duration(milliseconds: 200));
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final s = await _call<Map<dynamic, dynamic>>('hostScreenSize');
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if (s != null && (s['w'] as int? ?? 0) > 0) {
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w = s['w'] as int;
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h = s['h'] as int;
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break;
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}
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}
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if (w == 0) {
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await _refresh();
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return;
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}
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// 3) register the Rust host + wire frames out and input in.
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final handle = await nd.hostStart(
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wsUrl: _wsUrl,
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hostId: _id,
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name: 'Android',
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password: _password,
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width: w,
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height: h,
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);
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_handle = handle;
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_frameSub = _frameChannel.receiveBroadcastStream().listen(_onFrame);
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_eventSub = nd.hostEvents(handle: handle).listen(_onHostEvent);
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await _refresh();
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}
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Future<void> _stopHostFull() async {
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await _frameSub?.cancel();
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_frameSub = null;
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await _eventSub?.cancel();
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_eventSub = null;
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final h = _handle;
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_handle = null;
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if (h != null) nd.hostStop(handle: h);
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await _call('stopHost');
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if (mounted) setState(() => _viewerConnected = false);
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await Future.delayed(const Duration(milliseconds: 300));
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await _refresh();
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}
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void _onFrame(dynamic payload) {
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final h = _handle;
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if (h == null || payload is! Uint8List || payload.isEmpty) return;
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final keyframe = payload[0] == 1;
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final data = Uint8List.sublistView(payload, 1);
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nd.hostPushFrame(handle: h, data: data, keyframe: keyframe);
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}
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void _onHostEvent(nd.NdHostEvent ev) {
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switch (ev) {
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case nd.NdHostEvent_Mouse(:final x, :final y, :final buttons, :final wheel):
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_onMouse(x, y, buttons, wheel);
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case nd.NdHostEvent_Key(:final code, :final down):
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_call('injectKey', {'code': code, 'down': down});
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case nd.NdHostEvent_KeyframeRequested():
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_call('requestKeyframe');
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case nd.NdHostEvent_ViewerConnected():
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if (mounted) setState(() => _viewerConnected = true);
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case nd.NdHostEvent_ViewerLeft():
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if (mounted) setState(() => _viewerConnected = false);
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default:
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break;
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}
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}
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/// Translate the viewer's absolute pointer into Android gestures: a quick
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/// press+release = tap, a moved drag = swipe, wheel = scroll.
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void _onMouse(int x, int y, int buttons, double wheel) {
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if (wheel != 0) {
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final dy = (wheel.clamp(-3.0, 3.0) * 140).round();
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_call('injectSwipe', {
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'x1': x.toDouble(), 'y1': y.toDouble(),
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'x2': x.toDouble(), 'y2': (y + dy).toDouble(), 'dur': 120,
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});
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return;
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}
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final leftNow = (buttons & 1) != 0;
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final leftWas = (_btns & 1) != 0;
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_btns = buttons;
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if (leftNow && !leftWas) {
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_downX = x.toDouble();
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_downY = y.toDouble();
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_lastX = _downX;
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_lastY = _downY;
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_downMs = DateTime.now().millisecondsSinceEpoch;
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} else if (leftNow && leftWas) {
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_lastX = x.toDouble();
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_lastY = y.toDouble();
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} else if (!leftNow && leftWas) {
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_lastX = x.toDouble();
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_lastY = y.toDouble();
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final dist = (_lastX - _downX).abs() + (_lastY - _downY).abs();
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if (dist < 12) {
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_call('injectTap', {'x': _downX, 'y': _downY});
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} else {
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final dur = (DateTime.now().millisecondsSinceEpoch - _downMs)
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.clamp(40, 800);
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_call('injectSwipe', {
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'x1': _downX, 'y1': _downY, 'x2': _lastX, 'y2': _lastY, 'dur': dur,
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});
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}
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}
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: NetDeskColors.background,
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appBar: AppBar(
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backgroundColor: NetDeskColors.background,
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elevation: 0,
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title: const Text('Allow remote control'),
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),
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body: SafeArea(
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child: RefreshIndicator(
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color: NetDeskColors.accent,
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onRefresh: _refresh,
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child: ListView(
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padding: const EdgeInsets.all(16),
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children: [
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_statusCard(),
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if (_running && _id.isNotEmpty) ...[
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const SizedBox(height: 14),
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_credsCard(),
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],
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const SizedBox(height: 14),
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_startStopButton(),
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const SizedBox(height: 18),
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_tile(
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icon: Icons.touch_app_outlined,
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title: 'Remote input (accessibility)',
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subtitle: _accessibility
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? 'Enabled — a viewer can tap and swipe this device.'
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: 'Required so a viewer can tap and swipe. Tap to enable.',
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trailing: _accessibility
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? const Icon(Icons.check_circle, color: NetDeskColors.accent)
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: const Icon(Icons.chevron_right,
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color: NetDeskColors.textMuted),
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onTap: _accessibility
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? null
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: () async {
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await _call('openAccessibilitySettings');
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},
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),
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_switchTile(
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icon: Icons.schedule,
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title: 'Unattended access',
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subtitle: 'Start the host automatically after the device reboots.',
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value: _unattended,
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onChanged: (v) async {
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await _call('setUnattended', {'on': v});
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await _refresh();
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},
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),
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_switchTile(
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icon: Icons.visibility_off_outlined,
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title: 'Hide app icon',
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subtitle:
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'Remove NetDesk from the app drawer (it keeps running). '
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'Reopen it from your browser at netdesk.space.',
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value: _hideIcon,
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onChanged: (v) async {
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await _call('setHideIcon', {'hide': v});
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await _refresh();
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},
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),
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const SizedBox(height: 16),
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const Padding(
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padding: EdgeInsets.symmetric(horizontal: 4),
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child: Text(
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'Enter the ID and password above in any NetDesk viewer '
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'(Windows, web or another phone) to see and control this '
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'device. Keep the screen-capture notification on. '
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'Developed by Akronlogic.',
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style: TextStyle(
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color: NetDeskColors.textMuted, fontSize: 12, height: 1.4),
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),
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),
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],
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),
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),
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),
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);
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}
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Widget _statusCard() {
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final on = _running;
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return Container(
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padding: const EdgeInsets.all(18),
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decoration: BoxDecoration(
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color: NetDeskColors.surface,
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borderRadius: BorderRadius.circular(NetDeskRadius.lg),
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border: Border.all(color: NetDeskColors.border),
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),
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child: Row(
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children: [
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Container(
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width: 44,
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height: 44,
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decoration: BoxDecoration(
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color: on ? NetDeskColors.accentGlow : NetDeskColors.surfaceAlt,
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borderRadius: BorderRadius.circular(12),
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),
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child: Icon(
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on ? Icons.cast_connected : Icons.cast,
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color: on ? NetDeskColors.accent : NetDeskColors.textSecondary,
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),
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),
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const SizedBox(width: 14),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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on ? 'Host is active' : 'Host is off',
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style: const TextStyle(
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color: NetDeskColors.textPrimary,
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fontSize: 17,
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fontWeight: FontWeight.w700,
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),
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),
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const SizedBox(height: 2),
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Text(
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on
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? 'Capturing the screen · $_frames frames encoded'
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: 'This device cannot be controlled yet',
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style: const TextStyle(
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color: NetDeskColors.textSecondary, fontSize: 13),
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),
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],
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),
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),
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],
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),
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);
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}
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Widget _credsCard() {
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return Container(
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padding: const EdgeInsets.all(18),
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decoration: BoxDecoration(
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color: NetDeskColors.surface,
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borderRadius: BorderRadius.circular(NetDeskRadius.lg),
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border: Border.all(
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color: _viewerConnected ? NetDeskColors.accent : NetDeskColors.border,
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),
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Row(
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children: [
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Icon(
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_viewerConnected ? Icons.lock_person : Icons.vpn_key_outlined,
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size: 18,
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color: _viewerConnected
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? NetDeskColors.accent
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: NetDeskColors.textSecondary,
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),
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const SizedBox(width: 8),
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Text(
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_viewerConnected ? 'A viewer is connected' : 'Ready for a viewer',
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style: TextStyle(
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color: _viewerConnected
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? NetDeskColors.accent
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: NetDeskColors.textSecondary,
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fontSize: 13,
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fontWeight: FontWeight.w600,
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),
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),
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],
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),
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const SizedBox(height: 14),
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_credRow('Your ID', _id),
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const SizedBox(height: 10),
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_credRow('Password', _password),
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],
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),
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);
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}
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Widget _credRow(String label, String value) {
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return Row(
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children: [
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SizedBox(
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width: 86,
|
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child: Text(label,
|
||||
style: const TextStyle(
|
||||
color: NetDeskColors.textMuted, fontSize: 13)),
|
||||
),
|
||||
Expanded(
|
||||
child: SelectableText(
|
||||
value,
|
||||
style: const TextStyle(
|
||||
color: NetDeskColors.textPrimary,
|
||||
fontSize: 19,
|
||||
fontWeight: FontWeight.w700,
|
||||
letterSpacing: 1.5,
|
||||
),
|
||||
),
|
||||
),
|
||||
IconButton(
|
||||
icon: const Icon(Icons.copy_rounded,
|
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size: 18, color: NetDeskColors.textSecondary),
|
||||
onPressed: () {
|
||||
Clipboard.setData(ClipboardData(text: value));
|
||||
ScaffoldMessenger.of(context).showSnackBar(
|
||||
SnackBar(
|
||||
content: Text('$label copied'),
|
||||
duration: const Duration(seconds: 1),
|
||||
),
|
||||
);
|
||||
},
|
||||
),
|
||||
],
|
||||
);
|
||||
}
|
||||
|
||||
Widget _startStopButton() {
|
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return SizedBox(
|
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height: 52,
|
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child: ElevatedButton(
|
||||
onPressed: _busy ? null : _toggleHost,
|
||||
style: ElevatedButton.styleFrom(
|
||||
backgroundColor:
|
||||
_running ? NetDeskColors.danger : NetDeskColors.accent,
|
||||
foregroundColor: _running ? Colors.white : const Color(0xFF04210F),
|
||||
shape: RoundedRectangleBorder(
|
||||
borderRadius: BorderRadius.circular(NetDeskRadius.md),
|
||||
),
|
||||
),
|
||||
child: _busy
|
||||
? const SizedBox(
|
||||
width: 22,
|
||||
height: 22,
|
||||
child: CircularProgressIndicator(strokeWidth: 2.4),
|
||||
)
|
||||
: Text(
|
||||
_running ? 'Stop hosting' : 'Start hosting this device',
|
||||
style: const TextStyle(
|
||||
fontSize: 16, fontWeight: FontWeight.w700),
|
||||
),
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
Widget _tile({
|
||||
required IconData icon,
|
||||
required String title,
|
||||
required String subtitle,
|
||||
Widget? trailing,
|
||||
VoidCallback? onTap,
|
||||
}) {
|
||||
return Container(
|
||||
margin: const EdgeInsets.only(bottom: 10),
|
||||
decoration: BoxDecoration(
|
||||
color: NetDeskColors.surface,
|
||||
borderRadius: BorderRadius.circular(NetDeskRadius.md),
|
||||
border: Border.all(color: NetDeskColors.border),
|
||||
),
|
||||
child: ListTile(
|
||||
onTap: onTap,
|
||||
leading: Icon(icon, color: NetDeskColors.textSecondary),
|
||||
title: Text(title,
|
||||
style: const TextStyle(
|
||||
color: NetDeskColors.textPrimary,
|
||||
fontWeight: FontWeight.w600)),
|
||||
subtitle: Text(subtitle,
|
||||
style: const TextStyle(
|
||||
color: NetDeskColors.textMuted, fontSize: 12.5)),
|
||||
trailing: trailing,
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
Widget _switchTile({
|
||||
required IconData icon,
|
||||
required String title,
|
||||
required String subtitle,
|
||||
required bool value,
|
||||
required ValueChanged<bool> onChanged,
|
||||
}) {
|
||||
return Container(
|
||||
margin: const EdgeInsets.only(bottom: 10),
|
||||
decoration: BoxDecoration(
|
||||
color: NetDeskColors.surface,
|
||||
borderRadius: BorderRadius.circular(NetDeskRadius.md),
|
||||
border: Border.all(color: NetDeskColors.border),
|
||||
),
|
||||
child: SwitchListTile(
|
||||
value: value,
|
||||
onChanged: onChanged,
|
||||
activeThumbColor: NetDeskColors.accent,
|
||||
secondary: Icon(icon, color: NetDeskColors.textSecondary),
|
||||
title: Text(title,
|
||||
style: const TextStyle(
|
||||
color: NetDeskColors.textPrimary,
|
||||
fontWeight: FontWeight.w600)),
|
||||
subtitle: Text(subtitle,
|
||||
style: const TextStyle(
|
||||
color: NetDeskColors.textMuted, fontSize: 12.5)),
|
||||
),
|
||||
);
|
||||
}
|
||||
}
|
||||
Reference in new issue
Block a user