Qt 5.9 | Qt Bluetooth | QML Bluetooth Scanner Example | scanner.qml Example File

Qt 5.9.9 Reference Documentation

# scanner.qml Example File

scanner/scanner.qml

      /****************************************************************************
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      ** Copyright (C) 2017 The Qt Company Ltd.
      ** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the examples of the QtBluetooth module.
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      ** $QT_BEGIN_LICENSE:BSD$
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      import QtQuick 2.0
      import QtBluetooth 5.2

      Item {
          id: top

          property BluetoothService currentService

          BluetoothDiscoveryModel {
              id: btModel
              running: true
              discoveryMode: BluetoothDiscoveryModel.DeviceDiscovery
              onDiscoveryModeChanged: console.log("Discovery mode: " + discoveryMode)
              onServiceDiscovered: console.log("Found new service " + service.deviceAddress + " " + service.deviceName + " " + service.serviceName);
              onDeviceDiscovered: console.log("New device: " + device)
              onErrorChanged: {
                      switch (btModel.error) {
                      case BluetoothDiscoveryModel.PoweredOffError:
                          console.log("Error: Bluetooth device not turned on"); break;
                      case BluetoothDiscoveryModel.InputOutputError:
                          console.log("Error: Bluetooth I/O Error"); break;
                      case BluetoothDiscoveryModel.InvalidBluetoothAdapterError:
                          console.log("Error: Invalid Bluetooth Adapter Error"); break;
                      case BluetoothDiscoveryModel.NoError:
                          break;
                      default:
                          console.log("Error: Unknown Error"); break;
                      }
              }
         }

          Rectangle {
              id: busy

              width: top.width * 0.7;
              anchors.horizontalCenter: parent.horizontalCenter
              anchors.top: top.top;
              height: text.height*1.2;
              radius: 5
              color: "#1c56f3"
              visible: btModel.running

              Text {
                  id: text
                  text: "Scanning"
                  font.bold: true
                  font.pointSize: 20
                  anchors.centerIn: parent
              }

              SequentialAnimation on color {
                  id: busyThrobber
                  ColorAnimation { easing.type: Easing.InOutSine; from: "#1c56f3"; to: "white"; duration: 1000; }
                  ColorAnimation { easing.type: Easing.InOutSine; to: "#1c56f3"; from: "white"; duration: 1000 }
                  loops: Animation.Infinite
              }
          }

          ListView {
              id: mainList
              width: top.width
              anchors.top: busy.bottom
              anchors.bottom: buttonGroup.top
              anchors.bottomMargin: 10
              anchors.topMargin: 10
              clip: true

              model: btModel
              delegate: Rectangle {
                  id: btDelegate
                  width: parent.width
                  height: column.height + 10

                  property bool expended: false;
                  clip: true
                  Image {
                      id: bticon
                      source: "qrc:/default.png";
                      width: bttext.height;
                      height: bttext.height;
                      anchors.top: parent.top
                      anchors.left: parent.left
                      anchors.margins: 5
                  }

                  Column {
                      id: column
                      anchors.left: bticon.right
                      anchors.leftMargin: 5
                      Text {
                          id: bttext
                          text: deviceName ? deviceName : name
                          font.family: "FreeSerif"
                          font.pointSize: 16
                      }

                      Text {
                          id: details
                          function get_details(s) {
                              if (btModel.discoveryMode == BluetoothDiscoveryModel.DeviceDiscovery) {
                                  //We are doing a device discovery
                                  var str = "Address: " + remoteAddress;
                                  return str;
                              } else {
                                  var str = "Address: " + s.deviceAddress;
                                  if (s.serviceName) { str += "<br>Service: " + s.serviceName; }
                                  if (s.serviceDescription) { str += "<br>Description: " + s.serviceDescription; }
                                  if (s.serviceProtocol) { str += "<br>Protocol: " + s.serviceProtocol; }
                                  return str;
                              }
                          }
                          visible: opacity !== 0
                          opacity: btDelegate.expended ? 1 : 0.0
                          text: get_details(service)
                          font.family: "FreeSerif"
                          font.pointSize: 14
                          Behavior on opacity {
                              NumberAnimation { duration: 200}
                          }
                      }
                  }
                  Behavior on height { NumberAnimation { duration: 200} }

                  MouseArea {
                      anchors.fill: parent
                      onClicked: btDelegate.expended = !btDelegate.expended
                  }
              }
              focus: true
          }

          Row {
              id: buttonGroup
              property var activeButton: devButton

              anchors.bottom: parent.bottom
              anchors.horizontalCenter: parent.horizontalCenter
              anchors.bottomMargin: 5
              spacing: 10

              Button {
                  id: fdButton
                  width: top.width/3*0.9
                  //mdButton has longest text
                  height: mdButton.height
                  text: "Full Discovery"
                  onClicked: btModel.discoveryMode = BluetoothDiscoveryModel.FullServiceDiscovery
              }
              Button {
                  id: mdButton
                  width: top.width/3*0.9
                  text: "Minimal Discovery"
                  onClicked: btModel.discoveryMode = BluetoothDiscoveryModel.MinimalServiceDiscovery
              }
              Button {
                  id: devButton
                  width: top.width/3*0.9
                  //mdButton has longest text
                  height: mdButton.height
                  text: "Device Discovery"
                  onClicked: btModel.discoveryMode = BluetoothDiscoveryModel.DeviceDiscovery
              }
          }

      }