add cameraedit

covas_mobile/lib/pages/CameraEdit.dart

@@ -0,0 +1,154 @@
+import 'dart:async';
+import 'dart:io';
+
+import '../classes/events.dart';
+import 'package:image_picker/image_picker.dart';
+import 'EditEvent.dart';
+import 'package:camera/camera.dart';
+import 'package:flutter/material.dart';
+
+Future<void> main() async {
+  // Ensure that plugin services are initialized so that `availableCameras()`
+  // can be called before `runApp()`
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // Obtain a list of the available cameras on the device.
+  final cameras = await availableCameras();
+
+  // Get a specific camera from the list of available cameras.
+  final firstCamera = cameras.first;
+  Events? events;
+
+  runApp(
+    MaterialApp(
+      theme: ThemeData.dark(),
+      home: CameraEdit(
+          // Pass the appropriate camera to the TakePictureScreen widget.
+          camera: firstCamera,
+          events: events),
+    ),
+  );
+}
+
+// A screen that allows users to take a picture using a given camera.
+class CameraEdit extends StatefulWidget {
+  const CameraEdit({super.key, required this.camera, required this.events});
+  final Events? events;
+
+  final CameraDescription camera;
+
+  @override
+  CameraEditState createState() => CameraEditState();
+}
+
+class CameraEditState extends State<CameraEdit> {
+  late CameraController _controller;
+  late Future<void> _initializeControllerFuture;
+
+  @override
+  void initState() {
+    super.initState();
+    // To display the current output from the Camera,
+    // create a CameraController.
+
+    _controller = CameraController(
+      // Get a specific camera from the list of available cameras.
+      widget.camera,
+      // Define the resolution to use.
+      ResolutionPreset.medium,
+    );
+
+    // Next, initialize the controller. This returns a Future.
+    _initializeControllerFuture = _controller.initialize();
+  }
+
+  Future<void> pickImage() async {
+    final imagePicker = ImagePicker();
+    final pickedFile = await imagePicker.pickImage(source: ImageSource.gallery);
+    if (pickedFile != null) {
+      await Navigator.of(context).push(
+        MaterialPageRoute(
+          builder: (context) => EditEvent(
+            // Pass the automatically generated path to
+            // the DisplayPictureScreen widget.
+            events: widget.events,
+            imgPath: pickedFile.path,
+          ),
+        ),
+      );
+    }
+  }
+
+  @override
+  void dispose() {
+    // Dispose of the controller when the widget is disposed.
+    _controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+        appBar: AppBar(title: const Text('Take a picture')),
+        // You must wait until the controller is initialized before displaying the
+        // camera preview. Use a FutureBuilder to display a loading spinner until the
+        // controller has finished initializing.
+        body: FutureBuilder<void>(
+          future: _initializeControllerFuture,
+          builder: (context, snapshot) {
+            if (snapshot.connectionState == ConnectionState.done) {
+              // If the Future is complete, display the preview.
+              return CameraPreview(_controller);
+            } else {
+              // Otherwise, display a loading indicator.
+              return const Center(child: CircularProgressIndicator());
+            }
+          },
+        ),
+        floatingActionButton: Padding(
+            padding: const EdgeInsets.all(8.0),
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: <Widget>[
+                FloatingActionButton(
+                  onPressed: pickImage,
+                  child: Icon(Icons.photo_library),
+                ),
+                SizedBox(width: 40),
+                FloatingActionButton(
+                  // Provide an onPressed callback.
+                  onPressed: () async {
+                    // Take the Picture in a try / catch block. If anything goes wrong,
+                    // catch the error.
+                    try {
+                      // Ensure that the camera is initialized.
+                      await _initializeControllerFuture;
+
+                      // Attempt to take a picture and get the file `image`
+                      // where it was saved.
+                      final image = await _controller.takePicture();
+
+                      if (!context.mounted) return;
+
+                      // If the picture was taken, display it on a new screen.
+                      await Navigator.of(context).push(
+                        MaterialPageRoute(
+                          builder: (context) => EditEvent(
+                            // Pass the automatically generated path to
+                            // the DisplayPictureScreen widget.
+                            events: widget.events,
+                            imgPath: image.path,
+                          ),
+                        ),
+                      );
+                    } catch (e) {
+                      // If an error occurs, log the error to the console.
+                      print(e);
+                    }
+                  },
+                  child: const Icon(Icons.camera_alt),
+                )
+              ],
+            )));
+  }
+}