mirror of
https://github.com/rustdesk/rustdesk.git
synced 2024-12-04 03:49:25 +08:00
872 lines
27 KiB
Dart
872 lines
27 KiB
Dart
import 'dart:async';
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import 'package:desktop_multi_window/desktop_multi_window.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:get/get.dart';
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import 'package:provider/provider.dart';
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import 'package:wakelock_plus/wakelock_plus.dart';
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import 'package:flutter_improved_scrolling/flutter_improved_scrolling.dart';
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import 'package:flutter_hbb/models/state_model.dart';
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import '../../consts.dart';
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import '../../common/widgets/overlay.dart';
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import '../../common/widgets/remote_input.dart';
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import '../../common.dart';
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import '../../common/widgets/dialog.dart';
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import '../../common/widgets/toolbar.dart';
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import '../../models/model.dart';
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import '../../models/desktop_render_texture.dart';
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import '../../models/platform_model.dart';
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import '../../common/shared_state.dart';
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import '../../utils/image.dart';
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import '../widgets/remote_toolbar.dart';
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import '../widgets/kb_layout_type_chooser.dart';
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import '../widgets/tabbar_widget.dart';
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import 'package:flutter_hbb/native/custom_cursor.dart'
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if (dart.library.html) 'package:flutter_hbb/web/custom_cursor.dart';
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final SimpleWrapper<bool> _firstEnterImage = SimpleWrapper(false);
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// Used to skip session close if "move to new window" is clicked.
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final Map<String, bool> closeSessionOnDispose = {};
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class RemotePage extends StatefulWidget {
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RemotePage({
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Key? key,
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required this.id,
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required this.toolbarState,
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this.sessionId,
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this.tabWindowId,
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this.password,
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this.display,
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this.displays,
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this.tabController,
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this.switchUuid,
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this.forceRelay,
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this.isSharedPassword,
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}) : super(key: key);
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final String id;
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final SessionID? sessionId;
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final int? tabWindowId;
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final int? display;
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final List<int>? displays;
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final String? password;
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final ToolbarState toolbarState;
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final String? switchUuid;
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final bool? forceRelay;
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final bool? isSharedPassword;
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final SimpleWrapper<State<RemotePage>?> _lastState = SimpleWrapper(null);
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final DesktopTabController? tabController;
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FFI get ffi => (_lastState.value! as _RemotePageState)._ffi;
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@override
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State<RemotePage> createState() {
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final state = _RemotePageState();
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_lastState.value = state;
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return state;
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}
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}
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class _RemotePageState extends State<RemotePage>
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with AutomaticKeepAliveClientMixin, MultiWindowListener {
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Timer? _timer;
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String keyboardMode = "legacy";
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bool _isWindowBlur = false;
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final _cursorOverImage = false.obs;
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late RxBool _showRemoteCursor;
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late RxBool _zoomCursor;
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late RxBool _remoteCursorMoved;
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late RxBool _keyboardEnabled;
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var _blockableOverlayState = BlockableOverlayState();
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final FocusNode _rawKeyFocusNode = FocusNode(debugLabel: "rawkeyFocusNode");
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Function(bool)? _onEnterOrLeaveImage4Toolbar;
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late FFI _ffi;
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SessionID get sessionId => _ffi.sessionId;
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void _initStates(String id) {
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initSharedStates(id);
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_zoomCursor = PeerBoolOption.find(id, kOptionZoomCursor);
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_showRemoteCursor = ShowRemoteCursorState.find(id);
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_keyboardEnabled = KeyboardEnabledState.find(id);
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_remoteCursorMoved = RemoteCursorMovedState.find(id);
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}
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@override
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void initState() {
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super.initState();
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_initStates(widget.id);
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_ffi = FFI(widget.sessionId);
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Get.put(_ffi, tag: widget.id);
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_ffi.imageModel.addCallbackOnFirstImage((String peerId) {
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showKBLayoutTypeChooserIfNeeded(
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_ffi.ffiModel.pi.platform, _ffi.dialogManager);
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});
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_ffi.start(
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widget.id,
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password: widget.password,
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isSharedPassword: widget.isSharedPassword,
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switchUuid: widget.switchUuid,
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forceRelay: widget.forceRelay,
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tabWindowId: widget.tabWindowId,
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display: widget.display,
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displays: widget.displays,
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);
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WidgetsBinding.instance.addPostFrameCallback((_) {
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SystemChrome.setEnabledSystemUIMode(SystemUiMode.manual, overlays: []);
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_ffi.dialogManager
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.showLoading(translate('Connecting...'), onCancel: closeConnection);
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});
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if (!isLinux) {
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WakelockPlus.enable();
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}
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_ffi.ffiModel.updateEventListener(sessionId, widget.id);
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if (!isWeb) bind.pluginSyncUi(syncTo: kAppTypeDesktopRemote);
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_ffi.qualityMonitorModel.checkShowQualityMonitor(sessionId);
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// Session option should be set after models.dart/FFI.start
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_showRemoteCursor.value = bind.sessionGetToggleOptionSync(
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sessionId: sessionId, arg: 'show-remote-cursor');
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_zoomCursor.value = bind.sessionGetToggleOptionSync(
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sessionId: sessionId, arg: kOptionZoomCursor);
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DesktopMultiWindow.addListener(this);
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// if (!_isCustomCursorInited) {
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// customCursorController.registerNeedUpdateCursorCallback(
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// (String? lastKey, String? currentKey) async {
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// if (_firstEnterImage.value) {
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// _firstEnterImage.value = false;
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// return true;
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// }
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// return lastKey == null || lastKey != currentKey;
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// });
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// _isCustomCursorInited = true;
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// }
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_blockableOverlayState.applyFfi(_ffi);
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widget.tabController?.onSelected?.call(widget.id);
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}
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@override
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void onWindowBlur() {
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super.onWindowBlur();
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// On windows, we use `focus` way to handle keyboard better.
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// Now on Linux, there's some rdev issues which will break the input.
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// We disable the `focus` way for non-Windows temporarily.
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if (isWindows) {
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_isWindowBlur = true;
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// unfocus the primary-focus when the whole window is lost focus,
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// and let OS to handle events instead.
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_rawKeyFocusNode.unfocus();
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}
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stateGlobal.isFocused.value = false;
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}
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@override
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void onWindowFocus() {
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super.onWindowFocus();
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// See [onWindowBlur].
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if (isWindows) {
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_isWindowBlur = false;
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}
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stateGlobal.isFocused.value = true;
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}
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@override
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void onWindowRestore() {
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super.onWindowRestore();
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// On windows, we use `onWindowRestore` way to handle window restore from
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// a minimized state.
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if (isWindows) {
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_isWindowBlur = false;
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}
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if (!isLinux) {
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WakelockPlus.enable();
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}
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}
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// When the window is unminimized, onWindowMaximize or onWindowRestore can be called when the old state was maximized or not.
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@override
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void onWindowMaximize() {
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super.onWindowMaximize();
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if (!isLinux) {
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WakelockPlus.enable();
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}
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}
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@override
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void onWindowMinimize() {
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super.onWindowMinimize();
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if (!isLinux) {
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WakelockPlus.disable();
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}
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}
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@override
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void onWindowEnterFullScreen() {
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super.onWindowEnterFullScreen();
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if (isMacOS) {
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stateGlobal.setFullscreen(true);
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}
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}
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@override
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void onWindowLeaveFullScreen() {
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super.onWindowLeaveFullScreen();
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if (isMacOS) {
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stateGlobal.setFullscreen(false);
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}
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}
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@override
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Future<void> dispose() async {
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final closeSession = closeSessionOnDispose.remove(widget.id) ?? true;
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// https://github.com/flutter/flutter/issues/64935
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super.dispose();
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debugPrint("REMOTE PAGE dispose session $sessionId ${widget.id}");
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_ffi.textureModel.onRemotePageDispose(closeSession);
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// ensure we leave this session, this is a double check
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_ffi.inputModel.enterOrLeave(false);
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DesktopMultiWindow.removeListener(this);
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_ffi.dialogManager.hideMobileActionsOverlay();
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_ffi.recordingModel.onClose();
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_rawKeyFocusNode.dispose();
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await _ffi.close(closeSession: closeSession);
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_timer?.cancel();
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_ffi.dialogManager.dismissAll();
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if (closeSession) {
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await SystemChrome.setEnabledSystemUIMode(SystemUiMode.manual,
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overlays: SystemUiOverlay.values);
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}
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if (!isLinux) {
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await WakelockPlus.disable();
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}
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await Get.delete<FFI>(tag: widget.id);
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removeSharedStates(widget.id);
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}
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Widget emptyOverlay() => BlockableOverlay(
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/// the Overlay key will be set with _blockableOverlayState in BlockableOverlay
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/// see override build() in [BlockableOverlay]
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state: _blockableOverlayState,
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underlying: Container(
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color: Colors.transparent,
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),
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);
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Widget buildBody(BuildContext context) {
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remoteToolbar(BuildContext context) => RemoteToolbar(
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id: widget.id,
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ffi: _ffi,
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state: widget.toolbarState,
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onEnterOrLeaveImageSetter: (func) =>
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_onEnterOrLeaveImage4Toolbar = func,
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onEnterOrLeaveImageCleaner: () => _onEnterOrLeaveImage4Toolbar = null,
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setRemoteState: setState,
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);
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bodyWidget() {
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return Stack(
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children: [
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Container(
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color: Colors.black,
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child: RawKeyFocusScope(
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focusNode: _rawKeyFocusNode,
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onFocusChange: (bool imageFocused) {
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debugPrint(
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"onFocusChange(window active:${!_isWindowBlur}) $imageFocused");
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// See [onWindowBlur].
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if (isWindows) {
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if (_isWindowBlur) {
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imageFocused = false;
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Future.delayed(Duration.zero, () {
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_rawKeyFocusNode.unfocus();
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});
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}
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if (imageFocused) {
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_ffi.inputModel.enterOrLeave(true);
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} else {
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_ffi.inputModel.enterOrLeave(false);
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}
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}
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},
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inputModel: _ffi.inputModel,
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child: getBodyForDesktop(context))),
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Stack(
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children: [
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_ffi.ffiModel.pi.isSet.isTrue &&
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_ffi.ffiModel.waitForFirstImage.isTrue
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? emptyOverlay()
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: () {
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_ffi.ffiModel.tryShowAndroidActionsOverlay();
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return Offstage();
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}(),
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// Use Overlay to enable rebuild every time on menu button click.
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_ffi.ffiModel.pi.isSet.isTrue
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? Overlay(
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initialEntries: [OverlayEntry(builder: remoteToolbar)])
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: remoteToolbar(context),
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_ffi.ffiModel.pi.isSet.isFalse ? emptyOverlay() : Offstage(),
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],
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),
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],
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);
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}
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return Scaffold(
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backgroundColor: Theme.of(context).colorScheme.background,
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body: Obx(() {
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final imageReady = _ffi.ffiModel.pi.isSet.isTrue &&
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_ffi.ffiModel.waitForFirstImage.isFalse;
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if (imageReady) {
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// If the privacy mode(disable physical displays) is switched,
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// we should not dismiss the dialog immediately.
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if (DateTime.now().difference(togglePrivacyModeTime) >
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const Duration(milliseconds: 3000)) {
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// `dismissAll()` is to ensure that the state is clean.
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// It's ok to call dismissAll() here.
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_ffi.dialogManager.dismissAll();
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// Recreate the block state to refresh the state.
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_blockableOverlayState = BlockableOverlayState();
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_blockableOverlayState.applyFfi(_ffi);
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}
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// Block the whole `bodyWidget()` when dialog shows.
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return BlockableOverlay(
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underlying: bodyWidget(),
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state: _blockableOverlayState,
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);
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} else {
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// `_blockableOverlayState` is not recreated here.
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// The toolbar's block state won't work properly when reconnecting, but that's okay.
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return bodyWidget();
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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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super.build(context);
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return WillPopScope(
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onWillPop: () async {
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clientClose(sessionId, _ffi.dialogManager);
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return false;
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},
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child: MultiProvider(providers: [
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ChangeNotifierProvider.value(value: _ffi.ffiModel),
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ChangeNotifierProvider.value(value: _ffi.imageModel),
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ChangeNotifierProvider.value(value: _ffi.cursorModel),
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ChangeNotifierProvider.value(value: _ffi.canvasModel),
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ChangeNotifierProvider.value(value: _ffi.recordingModel),
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], child: buildBody(context)));
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}
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void enterView(PointerEnterEvent evt) {
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_cursorOverImage.value = true;
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_firstEnterImage.value = true;
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if (_onEnterOrLeaveImage4Toolbar != null) {
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try {
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_onEnterOrLeaveImage4Toolbar!(true);
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} catch (e) {
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//
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}
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}
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// See [onWindowBlur].
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if (!isWindows) {
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if (!_rawKeyFocusNode.hasFocus) {
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_rawKeyFocusNode.requestFocus();
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}
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_ffi.inputModel.enterOrLeave(true);
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}
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}
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void leaveView(PointerExitEvent evt) {
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if (_ffi.ffiModel.keyboard) {
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_ffi.inputModel.tryMoveEdgeOnExit(evt.position);
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}
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_cursorOverImage.value = false;
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_firstEnterImage.value = false;
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if (_onEnterOrLeaveImage4Toolbar != null) {
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try {
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_onEnterOrLeaveImage4Toolbar!(false);
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} catch (e) {
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//
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}
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}
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// See [onWindowBlur].
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if (!isWindows) {
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_ffi.inputModel.enterOrLeave(false);
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}
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}
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Widget _buildRawTouchAndPointerRegion(
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Widget child,
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PointerEnterEventListener? onEnter,
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PointerExitEventListener? onExit,
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) {
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return RawTouchGestureDetectorRegion(
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child: _buildRawPointerMouseRegion(child, onEnter, onExit),
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ffi: _ffi,
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);
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}
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Widget _buildRawPointerMouseRegion(
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Widget child,
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PointerEnterEventListener? onEnter,
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PointerExitEventListener? onExit,
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) {
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return RawPointerMouseRegion(
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onEnter: onEnter,
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onExit: onExit,
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onPointerDown: (event) {
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// A double check for blur status.
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// Note: If there's an `onPointerDown` event is triggered, `_isWindowBlur` is expected being false.
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// Sometimes the system does not send the necessary focus event to flutter. We should manually
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// handle this inconsistent status by setting `_isWindowBlur` to false. So we can
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// ensure the grab-key thread is running when our users are clicking the remote canvas.
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if (_isWindowBlur) {
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debugPrint(
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"Unexpected status: onPointerDown is triggered while the remote window is in blur status");
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_isWindowBlur = false;
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}
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if (!_rawKeyFocusNode.hasFocus) {
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_rawKeyFocusNode.requestFocus();
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}
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},
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inputModel: _ffi.inputModel,
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child: child,
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);
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}
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Widget getBodyForDesktop(BuildContext context) {
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var paints = <Widget>[
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MouseRegion(onEnter: (evt) {
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if (!isWeb) bind.hostStopSystemKeyPropagate(stopped: false);
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}, onExit: (evt) {
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if (!isWeb) bind.hostStopSystemKeyPropagate(stopped: true);
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}, child: LayoutBuilder(builder: (context, constraints) {
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Future.delayed(Duration.zero, () {
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Provider.of<CanvasModel>(context, listen: false).updateViewStyle();
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});
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final peerDisplay = CurrentDisplayState.find(widget.id);
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return Obx(
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() => _ffi.ffiModel.pi.isSet.isFalse
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? Container(color: Colors.transparent)
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: Obx(() {
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_ffi.textureModel.updateCurrentDisplay(peerDisplay.value);
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return ImagePaint(
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id: widget.id,
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zoomCursor: _zoomCursor,
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cursorOverImage: _cursorOverImage,
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keyboardEnabled: _keyboardEnabled,
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remoteCursorMoved: _remoteCursorMoved,
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listenerBuilder: (child) => _buildRawTouchAndPointerRegion(
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child, enterView, leaveView),
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ffi: _ffi,
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);
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}),
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);
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}))
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];
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if (!_ffi.canvasModel.cursorEmbedded) {
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paints.add(Obx(() => Offstage(
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offstage: _showRemoteCursor.isFalse || _remoteCursorMoved.isFalse,
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child: CursorPaint(
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id: widget.id,
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zoomCursor: _zoomCursor,
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))));
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}
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paints.add(
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Positioned(
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top: 10,
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right: 10,
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child: _buildRawTouchAndPointerRegion(
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QualityMonitor(_ffi.qualityMonitorModel), null, null),
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),
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);
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return Stack(
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children: paints,
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);
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}
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@override
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bool get wantKeepAlive => true;
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}
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class ImagePaint extends StatefulWidget {
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final FFI ffi;
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final String id;
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final RxBool zoomCursor;
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final RxBool cursorOverImage;
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final RxBool keyboardEnabled;
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final RxBool remoteCursorMoved;
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final Widget Function(Widget)? listenerBuilder;
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ImagePaint(
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{Key? key,
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required this.ffi,
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required this.id,
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required this.zoomCursor,
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required this.cursorOverImage,
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required this.keyboardEnabled,
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required this.remoteCursorMoved,
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this.listenerBuilder})
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: super(key: key);
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@override
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State<StatefulWidget> createState() => _ImagePaintState();
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}
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class _ImagePaintState extends State<ImagePaint> {
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bool _lastRemoteCursorMoved = false;
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String get id => widget.id;
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RxBool get zoomCursor => widget.zoomCursor;
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RxBool get cursorOverImage => widget.cursorOverImage;
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RxBool get keyboardEnabled => widget.keyboardEnabled;
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RxBool get remoteCursorMoved => widget.remoteCursorMoved;
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Widget Function(Widget)? get listenerBuilder => widget.listenerBuilder;
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@override
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void initState() {
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super.initState();
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}
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@override
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Widget build(BuildContext context) {
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final m = Provider.of<ImageModel>(context);
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var c = Provider.of<CanvasModel>(context);
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final s = c.scale;
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bool isViewAdaptive() => c.viewStyle.style == kRemoteViewStyleAdaptive;
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bool isViewOriginal() => c.viewStyle.style == kRemoteViewStyleOriginal;
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mouseRegion({child}) => Obx(() {
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double getCursorScale() {
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var c = Provider.of<CanvasModel>(context);
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var cursorScale = 1.0;
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if (isWindows) {
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// debug win10
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if (zoomCursor.value && isViewAdaptive()) {
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cursorScale = s * c.devicePixelRatio;
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}
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} else {
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if (zoomCursor.value || isViewOriginal()) {
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cursorScale = s;
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}
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}
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return cursorScale;
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}
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return MouseRegion(
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cursor: cursorOverImage.isTrue
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? c.cursorEmbedded
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? SystemMouseCursors.none
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: keyboardEnabled.isTrue
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? (() {
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if (remoteCursorMoved.isTrue) {
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_lastRemoteCursorMoved = true;
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return SystemMouseCursors.none;
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} else {
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if (_lastRemoteCursorMoved) {
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_lastRemoteCursorMoved = false;
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_firstEnterImage.value = true;
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}
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return _buildCustomCursor(
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context, getCursorScale());
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}
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}())
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: _buildDisabledCursor(context, getCursorScale())
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: MouseCursor.defer,
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onHover: (evt) {},
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child: child);
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});
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if (c.imageOverflow.isTrue && c.scrollStyle == ScrollStyle.scrollbar) {
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final paintWidth = c.getDisplayWidth() * s;
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final paintHeight = c.getDisplayHeight() * s;
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final paintSize = Size(paintWidth, paintHeight);
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final paintWidget = useTextureRender
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? _BuildPaintTextureRender(
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c, s, Offset.zero, paintSize, isViewOriginal())
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: _buildScrollbarNonTextureRender(m, paintSize, s);
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return NotificationListener<ScrollNotification>(
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onNotification: (notification) {
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c.updateScrollPercent();
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return false;
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},
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child: mouseRegion(
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child: Obx(() => _buildCrossScrollbarFromLayout(
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context,
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_buildListener(paintWidget),
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c.size,
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paintSize,
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c.scrollHorizontal,
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c.scrollVertical,
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)),
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));
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} else {
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if (c.size.width > 0 && c.size.height > 0) {
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final paintWidget = useTextureRender
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? _BuildPaintTextureRender(
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c,
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s,
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Offset(
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isLinux ? c.x.toInt().toDouble() : c.x,
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isLinux ? c.y.toInt().toDouble() : c.y,
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),
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c.size,
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isViewOriginal())
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: _buildScrollAuthNonTextureRender(m, c, s);
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return mouseRegion(child: _buildListener(paintWidget));
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} else {
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return Container();
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}
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}
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}
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Widget _buildScrollbarNonTextureRender(
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ImageModel m, Size imageSize, double s) {
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return CustomPaint(
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size: imageSize,
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painter: ImagePainter(image: m.image, x: 0, y: 0, scale: s),
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);
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}
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Widget _buildScrollAuthNonTextureRender(
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ImageModel m, CanvasModel c, double s) {
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return CustomPaint(
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size: Size(c.size.width, c.size.height),
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painter: ImagePainter(image: m.image, x: c.x / s, y: c.y / s, scale: s),
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);
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}
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Widget _BuildPaintTextureRender(
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CanvasModel c, double s, Offset offset, Size size, bool isViewOriginal) {
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final ffiModel = c.parent.target!.ffiModel;
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final displays = ffiModel.pi.getCurDisplays();
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final children = <Widget>[];
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final rect = ffiModel.rect;
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if (rect == null) {
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return Container();
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}
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final curDisplay = ffiModel.pi.currentDisplay;
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for (var i = 0; i < displays.length; i++) {
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final textureId = widget.ffi.textureModel
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.getTextureId(curDisplay == kAllDisplayValue ? i : curDisplay);
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if (true) {
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// both "textureId.value != -1" and "true" seems ok
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children.add(Positioned(
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left: (displays[i].x - rect.left) * s + offset.dx,
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top: (displays[i].y - rect.top) * s + offset.dy,
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width: displays[i].width * s,
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height: displays[i].height * s,
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child: Obx(() => Texture(
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textureId: textureId.value,
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filterQuality:
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isViewOriginal ? FilterQuality.none : FilterQuality.low,
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)),
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));
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}
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}
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return SizedBox(
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width: size.width,
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height: size.height,
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child: Stack(children: children),
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);
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}
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MouseCursor _buildCustomCursor(BuildContext context, double scale) {
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final cursor = Provider.of<CursorModel>(context);
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final cache = cursor.cache ?? preDefaultCursor.cache;
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return buildCursorOfCache(cursor, scale, cache);
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}
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MouseCursor _buildDisabledCursor(BuildContext context, double scale) {
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final cursor = Provider.of<CursorModel>(context);
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final cache = preForbiddenCursor.cache;
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return buildCursorOfCache(cursor, scale, cache);
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}
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Widget _buildCrossScrollbarFromLayout(
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BuildContext context,
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Widget child,
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Size layoutSize,
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Size size,
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ScrollController horizontal,
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ScrollController vertical,
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) {
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final scrollConfig = CustomMouseWheelScrollConfig(
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scrollDuration: kDefaultScrollDuration,
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scrollCurve: Curves.linearToEaseOut,
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mouseWheelTurnsThrottleTimeMs:
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kDefaultMouseWheelThrottleDuration.inMilliseconds,
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scrollAmountMultiplier: kDefaultScrollAmountMultiplier);
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var widget = child;
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if (layoutSize.width < size.width) {
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widget = ScrollConfiguration(
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behavior: ScrollConfiguration.of(context).copyWith(scrollbars: false),
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child: SingleChildScrollView(
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controller: horizontal,
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scrollDirection: Axis.horizontal,
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physics: cursorOverImage.isTrue
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? const NeverScrollableScrollPhysics()
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: null,
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child: widget,
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),
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);
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} else {
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widget = Row(
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children: [
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Container(
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width: ((layoutSize.width - size.width) ~/ 2).toDouble(),
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),
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widget,
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],
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);
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}
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if (layoutSize.height < size.height) {
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widget = ScrollConfiguration(
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behavior: ScrollConfiguration.of(context).copyWith(scrollbars: false),
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child: SingleChildScrollView(
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controller: vertical,
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physics: cursorOverImage.isTrue
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? const NeverScrollableScrollPhysics()
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: null,
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child: widget,
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),
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);
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} else {
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widget = Column(
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children: [
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Container(
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height: ((layoutSize.height - size.height) ~/ 2).toDouble(),
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),
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widget,
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],
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);
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}
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if (layoutSize.width < size.width) {
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widget = ImprovedScrolling(
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scrollController: horizontal,
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enableCustomMouseWheelScrolling: cursorOverImage.isFalse,
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customMouseWheelScrollConfig: scrollConfig,
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child: RawScrollbar(
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thickness: kScrollbarThickness,
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thumbColor: Colors.grey,
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controller: horizontal,
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thumbVisibility: false,
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trackVisibility: false,
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notificationPredicate: layoutSize.height < size.height
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? (notification) => notification.depth == 1
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: defaultScrollNotificationPredicate,
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child: widget,
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),
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);
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}
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if (layoutSize.height < size.height) {
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widget = ImprovedScrolling(
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scrollController: vertical,
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enableCustomMouseWheelScrolling: cursorOverImage.isFalse,
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customMouseWheelScrollConfig: scrollConfig,
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child: RawScrollbar(
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thickness: kScrollbarThickness,
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thumbColor: Colors.grey,
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controller: vertical,
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thumbVisibility: false,
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trackVisibility: false,
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child: widget,
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),
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);
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}
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return Container(
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child: widget,
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width: layoutSize.width,
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height: layoutSize.height,
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);
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}
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Widget _buildListener(Widget child) {
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if (listenerBuilder != null) {
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return listenerBuilder!(child);
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} else {
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return child;
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}
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}
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}
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class CursorPaint extends StatelessWidget {
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final String id;
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final RxBool zoomCursor;
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const CursorPaint({
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Key? key,
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required this.id,
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required this.zoomCursor,
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}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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final m = Provider.of<CursorModel>(context);
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final c = Provider.of<CanvasModel>(context);
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double hotx = m.hotx;
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double hoty = m.hoty;
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if (m.image == null) {
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if (preDefaultCursor.image != null) {
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hotx = preDefaultCursor.image!.width / 2;
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hoty = preDefaultCursor.image!.height / 2;
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}
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}
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double cx = c.x;
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double cy = c.y;
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if (c.viewStyle.style == kRemoteViewStyleOriginal &&
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c.scrollStyle == ScrollStyle.scrollbar) {
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final rect = c.parent.target!.ffiModel.rect;
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if (rect == null) {
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// unreachable!
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debugPrint('unreachable! The displays rect is null.');
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return Container();
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}
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if (cx < 0) {
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final imageWidth = rect.width * c.scale;
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cx = -imageWidth * c.scrollX;
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}
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if (cy < 0) {
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final imageHeight = rect.height * c.scale;
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cy = -imageHeight * c.scrollY;
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}
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}
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double x = (m.x - hotx) * c.scale + cx;
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double y = (m.y - hoty) * c.scale + cy;
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double scale = 1.0;
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final isViewOriginal = c.viewStyle.style == kRemoteViewStyleOriginal;
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if (zoomCursor.value || isViewOriginal) {
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x = m.x - hotx + cx / c.scale;
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y = m.y - hoty + cy / c.scale;
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scale = c.scale;
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}
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return CustomPaint(
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painter: ImagePainter(
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image: m.image ?? preDefaultCursor.image,
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x: x,
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y: y,
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scale: scale,
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),
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);
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}
|
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}
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