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/*
* Copyright 2022 Axel Waggershauser
*/
// SPDX-License-Identifier: Apache-2.0
import QtQuick
import QtQuick.Window
import QtQuick.Controls
import QtQuick.Layouts
import QtQuick.Shapes
import QtMultimedia
import ZXing
Window {
visible: true
width: 640
height: 480
title: Qt.application.name
property var nullPoints: [Qt.point(0,0), Qt.point(0,0), Qt.point(0,0), Qt.point(0,0)]
property var points: nullPoints
Timer {
id: resetInfo
interval: 1000
}
BarcodeReader {
id: barcodeReader
videoSink: videoOutput.videoSink
formats: (linearSwitch.checked ? (ZXing.LinearCodes) : ZXing.None) | (matrixSwitch.checked ? (ZXing.MatrixCodes) : ZXing.None)
tryRotate: tryRotateSwitch.checked
tryHarder: tryHarderSwitch.checked
tryInvert: tryInvertSwitch.checked
tryDownscale: tryDownscaleSwitch.checked
textMode: ZXing.TextMode.HRI
// callback with parameter 'barcode', called for every successfully processed frame
onFoundBarcode: (barcode)=> {
points = [barcode.position.topLeft, barcode.position.topRight, barcode.position.bottomRight, barcode.position.bottomLeft]
info.text = qsTr("Format: \t %1 \nText: \t %2 \nType: \t %3 \nTime: \t %4 ms").arg(barcode.formatName).arg(barcode.text).arg(barcode.contentTypeName).arg(runTime)
resetInfo.restart()
// console.log(barcode)
}
// called for every processed frame where no barcode was detected
onFailedRead: ()=> {
points = nullPoints
if (!resetInfo.running)
info.text = "No barcode found (in %1 ms)".arg(runTime)
}
}
MediaDevices {
id: devices
}
Camera {
id: camera
cameraDevice: devices.videoInputs[camerasComboBox.currentIndex] ? devices.videoInputs[camerasComboBox.currentIndex] : devices.defaultVideoInput
focusMode: Camera.FocusModeAutoNear
onErrorOccurred: console.log("camera error:" + errorString)
active: true
}
CaptureSession {
id: captureSession
camera: camera
videoOutput: videoOutput
}
ColumnLayout {
anchors.fill: parent
RowLayout {
Layout.fillWidth: true
Layout.fillHeight: false
visible: devices.videoInputs.length > 1
Label {
text: qsTr("Camera: ")
Layout.fillWidth: false
}
ComboBox {
id: camerasComboBox
Layout.fillWidth: true
model: devices.videoInputs
textRole: "description"
currentIndex: 0
}
}
VideoOutput {
id: videoOutput
Layout.fillHeight: true
Layout.fillWidth: true
function mapPointToItem(point)
{
if (videoOutput.sourceRect.width === 0 || videoOutput.sourceRect.height === 0)
return Qt.point(0, 0);
let dx = point.x;
let dy = point.y;
if ((videoOutput.orientation % 180) == 0)
{
dx = dx * videoOutput.contentRect.width / videoOutput.sourceRect.width;
dy = dy * videoOutput.contentRect.height / videoOutput.sourceRect.height;
}
else
{
dx = dx * videoOutput.contentRect.height / videoOutput.sourceRect.height;
dy = dx * videoOutput.contentRect.width / videoOutput.sourceRect.width;
}
switch ((videoOutput.orientation + 360) % 360)
{
case 0:
default:
return Qt.point(videoOutput.contentRect.x + dx, videoOutput.contentRect.y + dy);
case 90:
return Qt.point(videoOutput.contentRect.x + dy, videoOutput.contentRect.y + videoOutput.contentRect.height - dx);
case 180:
return Qt.point(videoOutput.contentRect.x + videoOutput.contentRect.width - dx, videoOutput.contentRect.y + videoOutput.contentRect.height -dy);
case 270:
return Qt.point(videoOutput.contentRect.x + videoOutput.contentRect.width - dy, videoOutput.contentRect.y + dx);
}
}
Shape {
id: polygon
anchors.fill: parent
visible: points.length === 4
ShapePath {
strokeWidth: 3
strokeColor: "red"
strokeStyle: ShapePath.SolidLine
fillColor: "transparent"
//TODO: really? I don't know qml...
startX: videoOutput.mapPointToItem(points[3]).x
startY: videoOutput.mapPointToItem(points[3]).y
PathLine {
x: videoOutput.mapPointToItem(points[0]).x
y: videoOutput.mapPointToItem(points[0]).y
}
PathLine {
x: videoOutput.mapPointToItem(points[1]).x
y: videoOutput.mapPointToItem(points[1]).y
}
PathLine {
x: videoOutput.mapPointToItem(points[2]).x
y: videoOutput.mapPointToItem(points[2]).y
}
PathLine {
x: videoOutput.mapPointToItem(points[3]).x
y: videoOutput.mapPointToItem(points[3]).y
}
}
}
Label {
id: info
color: "white"
padding: 10
background: Rectangle { color: "#80808080" }
}
ColumnLayout {
anchors.right: parent.right
anchors.bottom: parent.bottom
Switch {id: tryRotateSwitch; text: qsTr("Try Rotate"); checked: true }
Switch {id: tryHarderSwitch; text: qsTr("Try Harder"); checked: true }
Switch {id: tryInvertSwitch; text: qsTr("Try Invert"); checked: true }
Switch {id: tryDownscaleSwitch; text: qsTr("Try Downscale"); checked: true }
Switch {id: linearSwitch; text: qsTr("Linear Codes"); checked: true }
Switch {id: matrixSwitch; text: qsTr("Matrix Codes"); checked: true }
}
}
}
}
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