Qt 5.9 | Qt Bluetooth | Bluetooth Low Energy Scanner Example | main.qml Example File

Qt 5.9.9 Reference Documentation

# main.qml Example File

lowenergyscanner/assets/main.qml

      /***************************************************************************
      **
      ** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
      ** Copyright (C) 2017 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the QtBluetooth module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, you may use this file under the terms of the BSD license
      ** as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
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      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
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      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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      ****************************************************************************/

      import QtQuick 2.0

      Rectangle {
          id: back
          width: 300
          height: 600
          property bool deviceState: device.state
          onDeviceStateChanged: {
              if (!device.state)
                  info.visible = false;
          }

          Header {
              id: header
              anchors.top: parent.top
              headerText: "Start Discovery"
          }

          Dialog {
              id: info
              anchors.centerIn: parent
              visible: false
          }

          ListView {
              id: theListView
              width: parent.width
              clip: true

              anchors.top: header.bottom
              anchors.bottom: connectToggle.top
              model: device.devicesList

              delegate: Rectangle {
                  id: box
                  height:100
                  width: parent.width
                  color: "lightsteelblue"
                  border.width: 2
                  border.color: "black"
                  radius: 5

                  Component.onCompleted: {
                      info.visible = false;
                      header.headerText = "Select a device";
                  }

                  MouseArea {
                      anchors.fill: parent
                      onClicked: {
                          device.scanServices(modelData.deviceAddress);
                          pageLoader.source = "Services.qml"
                      }
                  }

                  Label {
                      id: deviceName
                      textContent: modelData.deviceName
                      anchors.top: parent.top
                      anchors.topMargin: 5
                  }

                  Label {
                      id: deviceAddress
                      textContent: modelData.deviceAddress
                      font.pointSize: deviceName.font.pointSize*0.7
                      anchors.bottom: box.bottom
                      anchors.bottomMargin: 5
                  }
              }
          }

          Menu {
              id: connectToggle

              menuWidth: parent.width
              anchors.bottom: menu.top
              menuText: { if (device.devicesList.length)
                              visible = true
                          else
                              visible = false
                          if (device.useRandomAddress)
                              "Address type: Random"
                          else
                              "Address type: Public"
              }

              onButtonClick: device.useRandomAddress = !device.useRandomAddress;
          }

          Menu {
              id: menu
              anchors.bottom: parent.bottom
              menuWidth: parent.width
              menuHeight: (parent.height/6)
              menuText: device.update
              onButtonClick: {
                  device.startDeviceDiscovery();
                  // if startDeviceDiscovery() failed device.state is not set
                  if (device.state) {
                      info.dialogText = "Searching...";
                      info.visible = true;
                  }
              }
          }

          Loader {
              id: pageLoader
              anchors.fill: parent
          }
      }