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adding basic navbar to the app and fixing camera loading.

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This commit is contained in:
Lucas Oskorep
2022-08-28 21:39:43 -04:00
parent c3420067e0
commit 342e567736
3 changed files with 202 additions and 98 deletions
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lib/widgets/poke_finder.dart
+86 -34
View File
@@ -1,6 +1,7 @@
import 'dart:convert';
import 'dart:io';
import 'dart:isolate';
import 'dart:math';
import 'package:camera/camera.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
@@ -34,11 +35,17 @@ class PokeFinder extends StatefulWidget {
class _PokeFinderState extends State<PokeFinder> with WidgetsBindingObserver {
/// true when inference is ongoing
///
final double _zoomSliderLogFactor = 1000.0;
bool predicting = false;
bool _cameraInitialized = false;
bool _cameraReady = false;
bool _classifierInitialized = false;
bool _saveClassifierImage = false;
int cameraIndex = 0;
int _cameraIndex = 0;
double _minZoom = 1.0;
double _maxZoom = 1.0;
double _currentZoom = 1.0;
late CameraController cameraController;
@@ -91,19 +98,41 @@ class _PokeFinderState extends State<PokeFinder> with WidgetsBindingObserver {
options: config.interpreters[0]);
}
void swapCamera() async {
logger.i(cameras);
logger.i(_cameraIndex);
_cameraIndex += 1;
if (cameras.length <= _cameraIndex) {
_cameraIndex = 0;
}
swapToCamera(cameras[_cameraIndex]);
}
void swapToCamera(CameraDescription cameraDescription) async {
setState(() {
_cameraReady = false;
});
_refreshIndicatorKey.currentState?.show();
cameraController = CameraController(cameraDescription, ResolutionPreset.low,
enableAudio: false);
cameraController.initialize().then((_) async {
/// previewSize is size of each image frame captured by controller
/// 352x288 on iOS, 240p (320x240) on Android with ResolutionPreset.low
await cameraController.startImageStream(onLatestImageAvailable);
_maxZoom = await cameraController.getMaxZoomLevel();
_minZoom = await cameraController.getMinZoomLevel();
setState(() {
_cameraInitialized = true;
_cameraReady = true;
_currentZoom = 1.0;
});
});
}
void saveMLImage() async {
logger.i('setting save classifier to true');
_saveClassifierImage = true;
}
/// Callback to receive each frame [CameraImage] perform inference on it
onLatestImageAvailable(CameraImage cameraImage) async {
if (_classifierInitialized) {
@@ -144,44 +173,66 @@ class _PokeFinderState extends State<PokeFinder> with WidgetsBindingObserver {
}
}
void swapCamera() async {
logger.i(cameras);
logger.i(cameraIndex);
cameraIndex += 1;
if (cameras.length <= cameraIndex) {
cameraIndex = 0;
}
swapToCamera(cameras[cameraIndex]);
}
void saveMLImage() async {
logger.i('setting save classifier to true');
_saveClassifierImage = true;
}
void setZoom() async {
logger.i(await cameraController.getMinZoomLevel());
logger.i(await cameraController.getMaxZoomLevel());
logger.i(cameraController.getMinZoomLevel());
logger.i(cameraController.getMaxZoomLevel());
logger.i(cameraController.setZoomLevel(0.7));
}
final GlobalKey<RefreshIndicatorState> _refreshIndicatorKey =
GlobalKey<RefreshIndicatorState>();
@override
Widget build(BuildContext context) {
// Return empty container while the camera is not initialized
if (!_cameraInitialized) {
return Container();
}
return Column(
children: [
AspectRatio(
aspectRatio: 1 / cameraController.value.aspectRatio,
child: CameraPreview(cameraController)),
TextButton(onPressed: swapCamera, child: const Text('Change Camera!')),
RefreshIndicator(
key: _refreshIndicatorKey,
onRefresh: () async {
// Replace this delay with the code to be executed during refresh
// and return a Future when code finishes execution.
while (!_cameraReady) {
await Future.delayed(const Duration(milliseconds: 100));
}
return;
},
child: !_cameraReady? Container(width: 100, height: 100,): Stack(
clipBehavior: Clip.none,
alignment: Alignment.center,
children: [
AspectRatio(
aspectRatio: 1 / cameraController.value.aspectRatio,
child: CameraPreview(cameraController)),
Positioned(
top: -10,
child: TextButton(
onPressed: swapCamera,
child: const Text('Change Camera!')),
),
Positioned(
bottom: -10,
child: Row(
children: [
SizedBox(
width: MediaQuery.of(context).size.width - 100,
child: Slider(
min: pow(_minZoom, 1 / _zoomSliderLogFactor)
.toDouble(),
max: pow(_maxZoom, 1 / _zoomSliderLogFactor)
.toDouble(),
divisions: 100,
value: _currentZoom,
onChanged: (double value) {
logger.i('Zoom updated $value');
_currentZoom = value;
cameraController.setZoomLevel(
pow(_currentZoom, _zoomSliderLogFactor)
.toDouble());
})),
Text(
pow(_currentZoom, _zoomSliderLogFactor)
.toStringAsFixed(2),
style: const TextStyle(color: Colors.lightBlue))
// style: const TextStyle(color: Colors.lightBlue))
],
))
])),
TextButton(
onPressed: saveMLImage, child: const Text('Save Model Image')),
TextButton(onPressed: setZoom, child: const Text('Zoom!'))
],
);
}
@@ -203,6 +254,7 @@ class _PokeFinderState extends State<PokeFinder> with WidgetsBindingObserver {
break;
case AppLifecycleState.resumed:
if (!cameraController.value.isStreamingImages) {
swapToCamera(cameras[_cameraIndex]);
await cameraController.startImageStream(onLatestImageAvailable);
}
break;
lib/widgets/tensordex_home.dart
+102 -50
View File
@@ -24,6 +24,7 @@ class _TensordexHomeState extends State<TensordexHome> {
/// Results from the image classifier
List<Recognition> results = [Recognition(1, 'NOTHING DETECTED', .5)];
Stats stats = Stats();
int _selectedNavBarIndex = 0;
/// Scaffold Key
GlobalKey<ScaffoldState> scaffoldKey = GlobalKey();
@@ -58,60 +59,111 @@ class _TensordexHomeState extends State<TensordexHome> {
});
}
void _onNavBarTapped(int index) {
setState(() {
_selectedNavBarIndex = index;
});
}
static const TextStyle optionStyle =
TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
@override
Widget build(BuildContext context) {
final List<Widget> _widgetOptions = <Widget>[
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
PokeFinder(
resultsCallback: resultsCallback, statsCallback: statsCallback),
Results(results, stats),
],
),
const Text(
'Index 1: Seen',
style: optionStyle,
),
const Text(
'Index 2: About',
style: optionStyle,
),
const Text(
'Index 3: Settings',
style: optionStyle,
),
];
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
drawer: Drawer(
child: ListView(
// Important: Remove any padding from the ListView.
padding: EdgeInsets.zero,
children: [
const DrawerHeader(
decoration: BoxDecoration(
color: Colors.blue,
),
child: Text('Drawer Header'),
),
ListTile(
title: const Text('Item 1'),
onTap: () {
// Update the state of the app.
// ...
},
),
ListTile(
title: const Text('Item 2'),
onTap: () {
// Update the state of the app.
// ...
},
),
],
appBar: AppBar(
title: Text(widget.title),
),
// drawer: Drawer(
// child: ListView(
// // Important: Remove any padding from the ListView.
// padding: EdgeInsets.zero,
// children: [
// const DrawerHeader(
// decoration: BoxDecoration(
// color: Colors.blue,
// ),
// child: Text('Drawer Header'),
// ),
// ListTile(
// title: const Text('Item 1'),
// onTap: () {
// // Update the state of the app.
// // ...
// },
// ),
// ListTile(
// title: const Text('Item 2'),
// onTap: () {
// // Update the state of the app.
// // ...
// },
// ),
// ],
// ),
// ),
body: Center(
child: _widgetOptions.elementAt(_selectedNavBarIndex),
),
floatingActionButton: GestureDetector(
onLongPress: () {
_incrementCounter();
},
child: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.photo_camera),
), // This trailing comma makes auto-formatting nicer for build methods.
),
bottomNavigationBar: BottomNavigationBar(
backgroundColor: Colors.lightBlue,
type: BottomNavigationBarType.shifting,
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.camera),
label: 'Camera',
backgroundColor: Colors.lightBlue,
),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
PokeFinder(
resultsCallback: resultsCallback,
statsCallback: statsCallback),
Results(results, stats),
],
BottomNavigationBarItem(
icon: Icon(Icons.call),
label: 'Calls',
backgroundColor: Colors.deepOrange),
BottomNavigationBarItem(
icon: Icon(Icons.chat),
label: 'Chats',
backgroundColor: Colors.red),
BottomNavigationBarItem(
icon: Icon(Icons.settings),
label: 'Settings',
backgroundColor: Colors.purple,
),
),
floatingActionButton: GestureDetector(
onLongPress: () {
_incrementCounter();
},
child: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.photo_camera),
), // This trailing comma makes auto-formatting nicer for build methods.
));
],
currentIndex: _selectedNavBarIndex,
selectedItemColor: Colors.amber,
onTap: _onNavBarTapped,
),
);
}
}