Merge branch 'beforeunload-fix' into 'master'

Beforeunload fix (fixes issue 24)

See merge request openflexure/openflexure-microscope-jsclient!12

app/builder-config-raspi.yaml

@@ -1,7 +1,6 @@
 extends: app/builder-config-base.yaml
 linux:
   target:
-    - AppImage
     - target: deb
       arch:
         - armv7l
@@ -9,4 +8,5 @@ linux:
   category: Science
 deb:
   category: Science
+  fpm: ['--architecture', 'armhf']
 electronVersion: 3.0.13

src/App.vue

@@ -63,6 +63,8 @@ export default {
 
     window.addEventListener('resize', this.handleResize)
     this.handleResize();
+
+    window.addEventListener('beforeunload', this.handleExit)
   },
 
   beforeDestroy: function () {
@@ -73,6 +75,11 @@ export default {
     handleResize: function(event) {
       this.window.width = window.innerWidth;
       this.window.height = window.innerHeight;
+    },
+
+    handleExit: function(event) {
+      console.log("Triggered beforeunload")
+      this.$root.$emit('globalTogglePreview', false)
     }
   }