120 lines
3.3 KiB
Dart
120 lines
3.3 KiB
Dart
import 'package:aves/widgets/editor/transform/cropper.dart';
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import 'package:flutter/material.dart';
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class VertexHandle extends StatefulWidget {
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final EdgeInsets margin;
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final ValueGetter<Offset> getPosition;
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final ValueSetter<Offset> setPosition;
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final VoidCallback onDragStart, onDragEnd;
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const VertexHandle({
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super.key,
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required this.margin,
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required this.getPosition,
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required this.setPosition,
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required this.onDragStart,
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required this.onDragEnd,
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});
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@override
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State<VertexHandle> createState() => _VertexHandleState();
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}
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class _VertexHandleState extends State<VertexHandle> {
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Offset _start = Offset.zero;
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Offset _totalDelta = Offset.zero;
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static const double _handleDim = Cropper.handleDimension;
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EdgeInsets get margin => widget.margin;
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@override
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Widget build(BuildContext context) {
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return Positioned.fromRect(
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rect: Rect.fromCenter(
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center: widget.getPosition().translate(margin.left, margin.right),
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width: _handleDim,
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height: _handleDim,
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),
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child: GestureDetector(
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onPanStart: (details) {
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_totalDelta = Offset.zero;
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_start = widget.getPosition();
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widget.onDragStart();
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},
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onPanUpdate: (details) {
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_totalDelta += details.delta;
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widget.setPosition(_start + _totalDelta);
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},
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onPanEnd: (details) {
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widget.onDragEnd();
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},
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child: const ColoredBox(
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color: Colors.transparent,
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),
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),
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);
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}
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}
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class EdgeHandle extends StatefulWidget {
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final EdgeInsets margin;
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final ValueGetter<Rect> getEdge;
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final ValueSetter<Rect> setEdge;
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final VoidCallback onDragStart, onDragEnd;
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const EdgeHandle({
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super.key,
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required this.margin,
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required this.getEdge,
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required this.setEdge,
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required this.onDragStart,
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required this.onDragEnd,
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});
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@override
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State<EdgeHandle> createState() => _EdgeHandleState();
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}
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class _EdgeHandleState extends State<EdgeHandle> {
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Rect _start = Rect.zero;
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Offset _totalDelta = Offset.zero;
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static const double _handleDim = Cropper.handleDimension;
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EdgeInsets get margin => widget.margin;
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@override
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Widget build(BuildContext context) {
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var edge = widget.getEdge();
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if (edge.width > _handleDim && edge.height == 0) {
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// horizontal edge
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edge = Rect.fromLTWH(edge.left + _handleDim / 2, edge.top - _handleDim / 2, edge.width - _handleDim, _handleDim);
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} else if (edge.height > _handleDim && edge.width == 0) {
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// vertical edge
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edge = Rect.fromLTWH(edge.left - _handleDim / 2, edge.top + _handleDim / 2, _handleDim, edge.height - _handleDim);
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}
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edge = edge.translate(margin.left, margin.right);
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return Positioned.fromRect(
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rect: edge,
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child: GestureDetector(
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onPanStart: (details) {
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_totalDelta = Offset.zero;
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_start = widget.getEdge();
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widget.onDragStart();
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},
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onPanUpdate: (details) {
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_totalDelta += details.delta;
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widget.setEdge(Rect.fromLTWH(_start.left + _totalDelta.dx, _start.top + _totalDelta.dy, _start.width, _start.height));
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},
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onPanEnd: (details) {
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widget.onDragEnd();
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},
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child: const ColoredBox(
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color: Colors.transparent,
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),
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),
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);
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}
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}
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