From 422ae925bdebfdadfcc6fbafa336b210be1bd00c Mon Sep 17 00:00:00 2001
From: Andy Stewart <lazycat.manatee@gmail.com>
Date: Tue, 3 Jul 2018 23:35:44 +0800
Subject: [PATCH] Need stop camera if all view will hide, otherwise camera will
 crash.

---
 app/camera/buffer.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/app/camera/buffer.py b/app/camera/buffer.py
index 4e4677c..b93ab82 100644
--- a/app/camera/buffer.py
+++ b/app/camera/buffer.py
@@ -34,6 +34,14 @@ class CameraBuffer(Buffer):
 
         self.add_widget(CameraWidget(QColor(0, 0, 0, 255)))
 
+    def all_views_hide(self):
+        # Need stop camera if all view will hide, otherwise camera will crash.
+        self.buffer_widget.camera.stop()
+
+    def some_view_show(self):
+        # Re-start camero after some view show.
+        self.buffer_widget.camera.start()
+
 class CameraWidget(QWidget):
 
     def __init__(self, background_color):