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build: 优化flutter触摸

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tongtongstudio
2026-07-15 14:41:14 +08:00
parent 015cd09e6b
commit fa2f27fbd0
1 changed files with 54 additions and 57 deletions
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111
webrtc_controller_flutter/lib/widgets/remote_touch_view.dart
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@@ -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;
if (size != null) {
final rx = _toRelativeX(event.localPosition, size);
final ry = _toRelativeY(event.localPosition, size);
debugPrint('RemoteTouchView: PointerDown - relX: ${rx.toStringAsFixed(3)}, relY: ${ry.toStringAsFixed(3)}');
widget.onMotionEvent(0, rx, ry);
// 开始触摸时缓存 RenderBox 和 Size
_cachedRenderBox = context.findRenderObject() as RenderBox?;
_cachedSize = _cachedRenderBox?.size;
if (_cachedSize != null) {
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 || size == null) return;
if (_currentPosition == null || _cachedSize == null) return;
_isLongPressed = true;
final x = _toRelativeX(_currentPosition!, size);
final y = _toRelativeY(_currentPosition!, size);
debugPrint('RemoteTouchView: LongPress - relX: ${x.toStringAsFixed(3)}, relY: ${y.toStringAsFixed(3)}');
final x = _toRelativeX(_currentPosition!, _cachedSize!);
final y = _toRelativeY(_currentPosition!, _cachedSize!);
widget.onLongPress(x, y);
});
},
onPointerMove: (event) {
_currentPosition = event.localPosition;
final size = context.size;
if (size != null) {
final rx = _toRelativeX(event.localPosition, size);
final ry = _toRelativeY(event.localPosition, size);
// Move 事件较多，可以考虑控制日志频率，这里直接打印
debugPrint('RemoteTouchView: PointerMove - relX: ${rx.toStringAsFixed(3)}, relY: ${ry.toStringAsFixed(3)}');
widget.onMotionEvent(2, rx, ry);
if (_cachedSize != null) {
final now = DateTime.now().millisecondsSinceEpoch;
// 采样率限制逻辑
if (now - _lastMoveTimestamp >= _sampleIntervalMs) {
_lastMoveTimestamp = now;
final rx = _toRelativeX(event.localPosition, _cachedSize!);
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();
final dy = (event.localPosition.dy - _startPosition!.dy).abs();
if (dx > _touchSlop || dy > _touchSlop) {
if ((event.localPosition - _startPosition!).distance > _touchSlop) {
_cancelLongPress();
}
}
@@ -139,43 +145,32 @@ class _RemoteTouchViewState extends State<RemoteTouchView> {
onPointerUp: (event) {
_cancelLongPress();
final size = context.size;
if (size != null) {
final rx = _toRelativeX(event.localPosition, size);
final ry = _toRelativeY(event.localPosition, size);
debugPrint('RemoteTouchView: PointerUp - relX: ${rx.toStringAsFixed(3)}, relY: ${ry.toStringAsFixed(3)}');
widget.onMotionEvent(1, rx, ry);
if (_cachedSize != null) {
final rx = _toRelativeX(event.localPosition, _cachedSize!);
final ry = _toRelativeY(event.localPosition, _cachedSize!);
widget.onMotionEvent(1, rx, ry); // ACTION_UP
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）。
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));
}
// 清理状态
_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> {
);
}
}