qml: switch to QtQuick Controls

electrum/gui/qml/components/QRScan.qml

@@ -0,0 +1,41 @@
+import QtQuick 2.6
+import QtMultimedia 5.6
+
+Item {
+
+    VideoOutput {
+        id: vo
+        anchors.fill: parent
+        source: camera
+        fillMode: VideoOutput.PreserveAspectCrop
+    }
+
+    MouseArea {
+        anchors.fill: parent
+        onClicked: {
+            vo.grabToImage(function(result) {
+                console.log("grab: image=" + (result.image !== undefined) + " url=" + result.url)
+                if (result.image !== undefined) {
+                    console.log('scanning image for QR')
+                    QR.scanImage(result.image)
+                }
+            })
+        }
+    }
+
+    Camera {
+        id: camera
+        deviceId: QtMultimedia.defaultCamera.deviceId
+        viewfinder.resolution: "640x480"
+
+        function dumpstats() {
+            console.log(camera.viewfinder.resolution)
+            console.log(camera.viewfinder.minimumFrameRate)
+            console.log(camera.viewfinder.maximumFrameRate)
+            var resolutions = camera.supportedViewfinderResolutions()
+            resolutions.forEach(function(item, i) {
+                console.log('' + item.width + 'x' + item.height)
+            })
+        }
+    }
+}