118 lines
3.6 KiB
Dart
118 lines
3.6 KiB
Dart
import 'package:flutter/material.dart';
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import 'filament_controller.dart';
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import 'filament_widget.dart';
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class GestureDetectingFilamentView extends StatefulWidget {
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final FilamentController controller;
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final bool showControls;
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const GestureDetectingFilamentView(
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{Key? key, required this.controller, this.showControls = false})
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: super(key: key);
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@override
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State<StatefulWidget> createState() => _GestureDetectingFilamentViewState();
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}
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class _GestureDetectingFilamentViewState
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extends State<GestureDetectingFilamentView> {
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bool _rotate = false;
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late Future Function(double x, double y) _functionStart;
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late Future Function(double x, double y) _functionUpdate;
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late Future Function() _functionEnd;
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double _lastScale = 0;
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@override
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void initState() {
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_setFunction();
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super.initState();
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}
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void _setFunction() {
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if (_rotate) {
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_functionStart = widget.controller.rotateStart;
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_functionUpdate = widget.controller.rotateUpdate;
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_functionEnd = widget.controller.rotateEnd;
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} else {
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_functionStart = widget.controller.panStart;
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_functionUpdate = widget.controller.panUpdate;
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_functionEnd = widget.controller.panEnd;
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}
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}
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@override
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void didUpdateWidget(Widget oldWidget) {
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if (widget.showControls !=
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(oldWidget as GestureDetectingFilamentView).showControls) {
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setState(() {});
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}
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super.didUpdateWidget(oldWidget);
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}
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@override
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Widget build(BuildContext context) {
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return Stack(children: [
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Positioned.fill(
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child: GestureDetector(
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behavior: HitTestBehavior.opaque,
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onScaleStart: (d) {
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if (d.pointerCount == 2) {
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// _lastScale = d.
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} else {
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// print("start ${d.focalPoint}");
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_functionStart(d.focalPoint.dx, d.focalPoint.dy);
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}
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},
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onScaleEnd: (d) {
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if (d.pointerCount == 2) {
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_lastScale = 0;
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} else {
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// print("end ${d.velocity}");
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_functionEnd();
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}
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},
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onScaleUpdate: (d) {
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if (d.pointerCount == 2) {
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if (_lastScale == 0) {
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_lastScale = d.scale;
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} else {
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// var zoomFactor = ;
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// if(zoomFactor < 0) {
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// zoomFactor *= 10;
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// }
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// print(zoomFactor);
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print(d.horizontalScale);
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// print(d.focalPoint.dx);
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widget.controller.zoom(d.scale > 1 ? 10 : -10);
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}
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} else {
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// print("update ${d.focalPoint}");
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_functionUpdate(d.focalPoint.dx, d.focalPoint.dy);
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}
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},
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child: FilamentWidget(controller: widget.controller))),
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widget.showControls
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? Align(
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alignment: Alignment.bottomRight,
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child: GestureDetector(
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onTap: () {
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setState(() {
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_rotate = !_rotate;
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_setFunction();
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});
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},
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child: Container(
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padding: const EdgeInsets.all(50),
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child: Icon(Icons.rotate_90_degrees_ccw,
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color: _rotate
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? Colors.white
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: Colors.white.withOpacity(0.5))),
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))
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: Container()
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]);
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}
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}
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