Size _widgetSize = Size.zero; Widget build(BuildContext context){ Offset o = Offset(_widgetSize.size.width/2, _widgetSize.size.height/2); returnTransform.translate( offset: o, child: MeasurableWidget(child: ..., onSized: _handleWidgetSized); ); } void_handleWidgetSized(Size value) => ...
Offset o = Offset(_widgetSize.size.width/2, _widgetSize.size.height/2); return Transform.translate( offset: o, child: MeasurableWidget(child: ..., onSized: _handleWidgetSized); void _handleWidgetSized(Size value) => setState(()=>_widgetSize = value); 优化 那么我们是否有办法来避免这个...
white), ), ), width: 200.0, height: 200.0, decoration: new BoxDecoration( color: _active ? Colors.lightGreen[700] : Colors.grey[600], ), ), ); } } 示例(管理子组件TapboxB的状态) //--- ParentWidget --- class ParentWidget extends StatefulWidget { @override _ParentWidgetState createS...
width) * .5; }); print('渲染完成 ${rect.size} $size ${size.width} $_searchIconLeft'); }); return Stack( alignment: AlignmentDirectional.center, children: <Widget>[ / / 搜索 按钮 AnimatedPositioned( child: ` 搜索`, left : _isEdit? 0 : _searchIconLeft, top: 0, bottom: 0 ), ...
示例：使用FindWindow函数获取窗口句柄，然后获得窗口大小和标题，并且移动窗口到指定位置。
void _getWidgetInfo(_) { final RenderBox renderBox = _widgetKey.currentContext?.findRenderObject() as RenderBox; final Size size = renderBox.size; // or _widgetKey.currentContext?.size print('Size: ${size.width}, ${size.height}'); final Offset offset = renderBox.localToGlobal(Offset.zero)...
finalOffset position=child.localToGlobal(Offset.zero,ancestor:parent);///remove the margin/paddingfinalOffset size=Offset(parentSize.width-child.size.width,parentSize.height-child.size.height);///if layout is not completed, the data will has some gap.///need more accurate time to compute///to...
toggle; }); } _getToggleChild() { if (toggle) { return Text('Toggle One'); } else { return MaterialButton(onPressed: () {}, child: Text('Toggle Two')); } } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text("Sample App"), ), body:...
@overrideWidget build(BuildContext context) {returnScaffold( appBar: AppBar( title:constText("Simple Container"), ), body: Container( alignment: Alignment.center, child: Container( alignment: Alignment.center, width:300, height:300, color: Colors.lightBlueAccent, ...
[TextField] The computation of the intrinsic width of a TextField should include the hint width only when visible #93337 commented on Dec 19, 2024 • 0 new comments ColorFiltered widget color applied to area outside the child constraints #98809 commented on Dec 19, 2024 • 0 new...