build: 优化flutter触摸

webrtc_controller_flutter/lib/widgets/remote_touch_view.dart

@@ -49,6 +49,14 @@ class _RemoteTouchViewState extends State<RemoteTouchView> {
   bool _isLongPressed = false;
   Timer? _longPressTimer;
 
+  // 缓存 RenderBox 信息以优化坐标换算开销
+  RenderBox? _cachedRenderBox;
+  Size? _cachedSize;
+
+  // 采样率限制：控制 ACTION_MOVE 的发送频率（例如每 16ms 发送一次，约 60fps）
+  int _lastMoveTimestamp = 0;
+  static const int _sampleIntervalMs = 16; 
+
   /// 长按触发阈值，对应 Android GestureDetector 默认的 LONG_PRESS_TIMEOUT（400ms）。
   static const _longPressTimeout = Duration(milliseconds: 400);
 
@@ -76,14 +84,11 @@ class _RemoteTouchViewState extends State<RemoteTouchView> {
   Widget build(BuildContext context) {
     return Focus(
       autofocus: true,
-      // 捕获物理按键（外接键盘 / 遥控器等）。
       onKeyEvent: (node, event) {
         if (event is KeyDownEvent) {
-          debugPrint('RemoteTouchView: KeyDown - ${event.logicalKey.debugName} (${event.logicalKey.keyId})');
           widget.onKey(event.logicalKey.keyId, 0);
           return KeyEventResult.handled;
         } else if (event is KeyUpEvent) {
-          debugPrint('RemoteTouchView: KeyUp - ${event.logicalKey.debugName} (${event.logicalKey.keyId})');
           widget.onKey(event.logicalKey.keyId, 1);
           return KeyEventResult.handled;
         }
@@ -97,41 +102,42 @@ class _RemoteTouchViewState extends State<RemoteTouchView> {
           _startPosition = event.localPosition;
           _currentPosition = event.localPosition;
           _startTime = DateTime.now();
+          _lastMoveTimestamp = 0; // 重置采样计时
 
-          final size = context.size;
+          // 开始触摸时缓存 RenderBox 和 Size
-          if (size != null) {
+          _cachedRenderBox = context.findRenderObject() as RenderBox?;
-            final rx = _toRelativeX(event.localPosition, size);
+          _cachedSize = _cachedRenderBox?.size;
-            final ry = _toRelativeY(event.localPosition, size);
+
-            debugPrint('RemoteTouchView: PointerDown - relX: ${rx.toStringAsFixed(3)}, relY: ${ry.toStringAsFixed(3)}');
+          if (_cachedSize != null) {
-            widget.onMotionEvent(0, rx, ry);
+            final rx = _toRelativeX(event.localPosition, _cachedSize!);
+            final ry = _toRelativeY(event.localPosition, _cachedSize!);
+            widget.onMotionEvent(0, rx, ry); // ACTION_DOWN
           }
 
           _longPressTimer = Timer(_longPressTimeout, () {
-            final size = context.size;
+            if (_currentPosition == null || _cachedSize == null) return;
-            if (_currentPosition == null || size == null) return;
             _isLongPressed = true;
-            final x = _toRelativeX(_currentPosition!, size);
+            final x = _toRelativeX(_currentPosition!, _cachedSize!);
-            final y = _toRelativeY(_currentPosition!, size);
+            final y = _toRelativeY(_currentPosition!, _cachedSize!);
-            debugPrint('RemoteTouchView: LongPress   - relX: ${x.toStringAsFixed(3)}, relY: ${y.toStringAsFixed(3)}');
             widget.onLongPress(x, y);
           });
         },
         onPointerMove: (event) {
           _currentPosition = event.localPosition;
           
-          final size = context.size;
+          if (_cachedSize != null) {
-          if (size != null) {
+            final now = DateTime.now().millisecondsSinceEpoch;
-            final rx = _toRelativeX(event.localPosition, size);
+            // 采样率限制逻辑
-            final ry = _toRelativeY(event.localPosition, size);
+            if (now - _lastMoveTimestamp >= _sampleIntervalMs) {
-            // Move 事件较多，可以考虑控制日志频率，这里直接打印
+              _lastMoveTimestamp = now;
-            debugPrint('RemoteTouchView: PointerMove - relX: ${rx.toStringAsFixed(3)}, relY: ${ry.toStringAsFixed(3)}');
+              final rx = _toRelativeX(event.localPosition, _cachedSize!);
-            widget.onMotionEvent(2, rx, ry);
+              final ry = _toRelativeY(event.localPosition, _cachedSize!);
+              widget.onMotionEvent(2, rx, ry); // ACTION_MOVE
+            }
           }
 
           if (_longPressTimer != null && _startPosition != null) {
-            final dx = (event.localPosition.dx - _startPosition!.dx).abs();
+            if ((event.localPosition - _startPosition!).distance > _touchSlop) {
-            final dy = (event.localPosition.dy - _startPosition!.dy).abs();
-            if (dx > _touchSlop || dy > _touchSlop) {
               _cancelLongPress();
             }
           }
@@ -139,43 +145,32 @@ class _RemoteTouchViewState extends State<RemoteTouchView> {
         onPointerUp: (event) {
           _cancelLongPress();
 
-          final size = context.size;
+          if (_cachedSize != null) {
-          if (size != null) {
+            final rx = _toRelativeX(event.localPosition, _cachedSize!);
-            final rx = _toRelativeX(event.localPosition, size);
+            final ry = _toRelativeY(event.localPosition, _cachedSize!);
-            final ry = _toRelativeY(event.localPosition, size);
+            widget.onMotionEvent(1, rx, ry); // ACTION_UP
-            debugPrint('RemoteTouchView: PointerUp   - relX: ${rx.toStringAsFixed(3)}, relY: ${ry.toStringAsFixed(3)}');
+
-            widget.onMotionEvent(1, rx, ry);
+            if (!_isLongPressed && _startPosition != null && _startTime != null) {
+              final startX = _toRelativeX(_startPosition!, _cachedSize!);
+              final startY = _toRelativeY(_startPosition!, _cachedSize!);
+              final duration = DateTime.now().difference(_startTime!).inMilliseconds;
+              final dx = (rx - startX).abs();
+              final dy = (ry - startY).abs();
+
+              if (duration < 200 && dx < 0.02 && dy < 0.02) {
+                widget.onTouch(startX, startY);
+              } else {
+                widget.onSwipe(startX, startY, rx, ry, max(duration, 1));
+              }
+            }
           }
 
-          // 长按已触发则不再派发单击 / 滑动事件（对应 Android 端 isLongPressed 逻辑）。
+          // 清理状态
-          if (_isLongPressed) {
-            _startPosition = null;
-            _currentPosition = null;
-            _startTime = null;
-            return;
-          }
-          if (_startPosition == null || size == null || _startTime == null) {
-            return;
-          }
-          final startX = _toRelativeX(_startPosition!, size);
-          final startY = _toRelativeY(_startPosition!, size);
-          final endX = _toRelativeX(event.localPosition, size);
-          final endY = _toRelativeY(event.localPosition, size);
-          final duration = DateTime.now().difference(_startTime!).inMilliseconds;
-
-          final dx = (endX - startX).abs();
-          final dy = (endY - startY).abs();
-
-          if (duration < 200 && dx < 0.02 && dy < 0.02) {
-            debugPrint('RemoteTouchView: Detected Touch   - x: ${startX.toStringAsFixed(3)}, y: ${startY.toStringAsFixed(3)}');
-            widget.onTouch(startX, startY);
-          } else {
-            debugPrint('RemoteTouchView: Detected Swipe   - from (${startX.toStringAsFixed(3)}, ${startY.toStringAsFixed(3)}) to (${endX.toStringAsFixed(3)}, ${endY.toStringAsFixed(3)}), duration: ${max(duration, 1)}ms');
-            widget.onSwipe(startX, startY, endX, endY, max(duration, 1));
-          }
           _startPosition = null;
           _currentPosition = null;
           _startTime = null;
+          _cachedRenderBox = null;
+          _cachedSize = null;
         },
         child: const ColoredBox(
           color: Colors.transparent,
@@ -185,3 +180,5 @@ class _RemoteTouchViewState extends State<RemoteTouchView> {
     );
   }
 }
+
+