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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
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@@ -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;