Qt 5.7 | Qt Bluetooth | Bluetooth Low Energy Heart Listener Example | results.qml Example File

Qt 5.7.1 Reference Documentation

# results.qml Example File

heartlistener/assets/results.qml

      /***************************************************************************
      **
      ** Copyright (C) 2014 BlackBerry Limited. All rights reserved.
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the examples of the QtBluetooth module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** 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
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
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      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
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      import QtQuick 2.0
      import "draw.js" as DrawGraph

      Rectangle {
          id: results
          color: "#F0EBED"

          Component.onCompleted:  heartRate.obtainResults()

          function getTime() {
              var t = heartRate.time;
              var min = Math.floor(t/60);
              var sec = t%60;
              var r = min + " min " + sec + " sec ";
              return r;
          }

          function drawGraph() {
              var b = plot.height/200;
              var ctx = canvas1.getContext('2d');
              ctx.beginPath()
              ctx.moveTo(10, plot.height- (b*60))
              var size = heartRate.measurementsSize();
              var difference = (plot.width-topbar.width)/size;

              for (var i = 0; i< size; i++) {
                  var value = heartRate.measurements(i);
                  if (i == 0) {
                      ctx.moveTo(10+2, (plot.height- (value*b) + 2));
                      ctx.rect((10 + i*difference), (plot.height- (value*b)), 4, 4);

                  }
                  else {
                      ctx.lineTo((10+2 + i*difference), (plot.height- (value*b) + 2));
                      ctx.rect((10 + i*difference), (plot.height- (value*b)), 4, 4);
                  }

              }
              ctx.fillStyle = "#3870BA"
              ctx.fill()
              ctx.strokeStyle = "#3870BA"
              ctx.stroke()
              ctx.closePath()
          }

          Rectangle {
              id: res
              width: parent.width
              anchors.top: parent.top
              height: 80
              color: "#F0EBED"
              border.color: "#3870BA"
              border.width: 2
              radius: 10
              Text {
                  id: restText
                  color: "#3870BA"
                  font.pixelSize: 34
                  anchors.centerIn: parent
                  text: "Results"
              }
          }

          Text {
              id: topbar
              text: "200"
              anchors.left: parent.left
              anchors.top: res.bottom
              anchors.rightMargin: 4
              color: "#3870BA"
              z: 50
          }

          Rectangle {
              id: level
              anchors.left: topbar.right

              anchors.top: res.bottom
              height: ((results.height -(res.height + menuLast.height + start.height ))/2)
              width: 3
              color: "#3870BA"
          }

          Text {
              id: middlebar
              anchors.verticalCenter: level.verticalCenter
              anchors.left: parent.left
              text: "100"
              color: "#3870BA"
              z: 50
          }

          Rectangle{
              id: downlevel
              anchors.bottom: cover.top
              width: parent.width
              anchors.left: level.right
              height: 3
              color: "#3870BA"
              z: 50
          }

          Rectangle {
              id: plot
              anchors.left: level.right
              anchors.leftMargin: 15
              width: results.width
              height: ((parent.height-(res.height+menuLast.height+start.height))/2)

              anchors.top: res.bottom
              color: "#F0EBED"
              Canvas {
                  id: canvas1
                  anchors.fill: parent
                  z: 150
                  onPaint: drawGraph()
              }
          }

          Rectangle {
              id: cover
              anchors.top: plot.bottom
              anchors.bottom: menuLast.top
              width: parent.width
              height: ((parent.height-(res.height+menuLast.height+start.height))/2)
              color: "#F0EBED"
              radius: 10
              border.color: "#3870BA"
              border.width: 2

              Flickable {
                  id: scroll
                  anchors.fill: parent
                  anchors.margins: 5
                  clip: true
                  contentWidth: parent.width
                  contentHeight: stresult.height

                  Rectangle {
                      id: stresult
                      width: parent.width
                      height: (results.height - (res.height + menuLast.height + start.height - 100))
                      color: "#F0EBED"
                      radius: 10

                      Text {
                          id: averageHR
                          font.pixelSize: 30;
                          anchors.horizontalCenter: parent.horizontalCenter
                          anchors.top: parent.top

                          color: "#3870BA"
                          text: "Average Heart Rate"
                      }

                      Text {
                          id: averageHRt
                          font.pixelSize: 40; font.bold: true
                          anchors.top: averageHR.bottom
                          anchors.horizontalCenter: parent.horizontalCenter
                          anchors.topMargin: 10
                          color: "#3870BA"
                          text: heartRate.average
                      }

                      Text {
                          id: time
                          font.pixelSize: 30;
                          anchors.top: averageHRt.bottom
                          anchors.horizontalCenter: parent.horizontalCenter
                          anchors.topMargin: 10
                          color: "#3870BA"
                          text: "Seconds measured:"
                      }

                      Text {
                          id: timet
                          font.pixelSize:  40; font.bold: true
                          anchors.top: time.bottom
                          anchors.horizontalCenter: parent.horizontalCenter
                          anchors.topMargin: 10
                          color: "#3870BA"
                          text: getTime()
                      }
                      Text {
                          id: maxi
                          font.pixelSize:  30;
                          anchors.top: timet.bottom
                          anchors.horizontalCenter: parent.horizontalCenter
                          anchors.topMargin: 20
                          color: "#3870BA"
                          text: "  Max  ||  Min "
                      }

                      Text {
                          id: mini
                          font.pixelSize:  40; font.bold: true
                          anchors.top:maxi.bottom
                          anchors.horizontalCenter: parent.horizontalCenter
                          anchors.topMargin: 10
                          color: "#3870BA"
                          text: " " + heartRate.maxHR + " || " + heartRate.minHR
                      }

                      Text {
                          id: calories
                          font.pixelSize:  30;
                          anchors.top: mini.bottom
                          anchors.horizontalCenter: parent.horizontalCenter
                          anchors.topMargin: 10
                          color: "#3870BA"
                          text: "  Calories "
                      }

                      Text {
                          id: caloriestext
                          font.pixelSize:  40; font.bold: true
                          anchors.top:calories.bottom
                          anchors.horizontalCenter: parent.horizontalCenter
                          anchors.topMargin: 10
                          color: "#3870BA"
                          text: heartRate.calories.toFixed(3)
                      }
                  }
              }
          }

          Button {
              id:menuLast
              buttonWidth: parent.width
              buttonHeight: 0.1*parent.height
              anchors.horizontalCenter: parent.horizontalCenter
              anchors.bottom: start.top
              text: "Menu"
              onButtonClick: { pageLoader.source="main.qml"}
          }

          Button {
              id:start
              buttonWidth: parent.width
              buttonHeight: 0.1*parent.height
              anchors.horizontalCenter: parent.horizontalCenter
              anchors.bottom: parent.bottom
              text: "Start Monitoring"
              onButtonClick: {
                  heartRate.connectToService(heartRate.deviceAddress());
                  pageLoader.source="monitor.qml";
              }
          }
      }