From 4d1af9144d1fb5fd9d728f25ff8fafd413f20c7c Mon Sep 17 00:00:00 2001
From: Russ Biggs <russbiggs@gmail.com>
Date: Wed, 12 May 2021 09:55:07 -0600
Subject: [PATCH] await camera capture to prevent multiple button clicks
 resolves #118

---
 lib/ui/camera/camera_screen.dart | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/ui/camera/camera_screen.dart b/lib/ui/camera/camera_screen.dart
index 54d0cc4..1a609ba 100644
--- a/lib/ui/camera/camera_screen.dart
+++ b/lib/ui/camera/camera_screen.dart
@@ -36,6 +36,7 @@ class _CameraScreenState extends State<CameraScreen> {
   String imgPath;
   double _position;
   String _pointId;
+  bool awaitingCapture = false;
 
   Future initCamera(CameraDescription cameraDescription) async {
     if (cameraController != null) {
@@ -118,9 +119,7 @@ class _CameraScreenState extends State<CameraScreen> {
           color: Color.fromRGBO(0, 0, 0, 0.6),
         ),
         backgroundColor: Color.fromRGBO(255, 255, 255, 0.2),
-        onPressed: () {
-          onCapture(context);
-        },
+        onPressed: awaitingCapture ? null : () => onCapture(context),
       ),
       floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
     );
@@ -132,7 +131,9 @@ class _CameraScreenState extends State<CameraScreen> {
       final name = DateTime.now();
       final path = "${p.path}/$name.png";
       try {
+        awaitingCapture = true;
         XFile img = await cameraController.takePicture();
+        awaitingCapture = false;
         await img.saveTo(path);
         Navigator.pushNamed(context, PreviewScreen.routeName,
             arguments: PreviewScreenArguments(widget.surveyItemId, path,