Qt 5.11 | Qt Bluetooth | Bluetooth Low Energy Heart Rate Game | Measure.qml Example File

Qt 5.11.3 Reference Documentation

# Measure.qml Example File

heartrate-game/qml/Measure.qml

      /***************************************************************************
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      ** This file is part of the examples of the QtBluetooth module of the Qt Toolkit.
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      import QtQuick 2.5

      GamePage {
          id: measurePage

          errorMessage: deviceHandler.error
          infoMessage: deviceHandler.info

          property real __timeCounter: 0;
          property real __maxTimeCount: 60
          property string relaxText: qsTr("Relax!\nWhen you are ready, press Start. You have %1s time to increase heartrate so much as possible.\nGood luck!").arg(__maxTimeCount)

          function close()
          {
              deviceHandler.stopMeasurement();
              deviceHandler.disconnectService();
              app.prevPage();
          }

          function start()
          {
              if (!deviceHandler.measuring) {
                  __timeCounter = 0;
                  deviceHandler.startMeasurement()
              }
          }

          function stop()
          {
              if (deviceHandler.measuring) {
                  deviceHandler.stopMeasurement()
              }

              app.showPage("Stats.qml")
          }

          Timer {
              id: measureTimer
              interval: 1000
              running: deviceHandler.measuring
              repeat: true
              onTriggered: {
                  __timeCounter++;
                  if (__timeCounter >= __maxTimeCount)
                      measurePage.stop()
              }
          }

          Column {
              anchors.centerIn: parent
              spacing: GameSettings.fieldHeight * 0.5

              Rectangle {
                  id: circle
                  anchors.horizontalCenter: parent.horizontalCenter
                  width: Math.min(measurePage.width, measurePage.height-GameSettings.fieldHeight*4) - 2*GameSettings.fieldMargin
                  height: width
                  radius: width*0.5
                  color: GameSettings.viewColor

                  Text {
                      id: hintText
                      anchors.centerIn: parent
                      anchors.verticalCenterOffset: -parent.height*0.1
                      horizontalAlignment: Text.AlignHCenter
                      verticalAlignment: Text.AlignVCenter
                      width: parent.width * 0.8
                      height: parent.height * 0.6
                      wrapMode: Text.WordWrap
                      text: measurePage.relaxText
                      visible: !deviceHandler.measuring
                      color: GameSettings.textColor
                      fontSizeMode: Text.Fit
                      minimumPixelSize: 10
                      font.pixelSize: GameSettings.mediumFontSize
                  }

                  Text {
                      id: text
                      anchors.centerIn: parent
                      anchors.verticalCenterOffset: -parent.height*0.15
                      font.pixelSize: parent.width * 0.45
                      text: deviceHandler.hr
                      visible: deviceHandler.measuring
                      color: GameSettings.textColor
                  }

                  Item {
                      id: minMaxContainer
                      anchors.horizontalCenter: parent.horizontalCenter
                      width: parent.width*0.7
                      height: parent.height * 0.15
                      anchors.bottom: parent.bottom
                      anchors.bottomMargin: parent.height*0.16
                      visible: deviceHandler.measuring

                      Text {
                          anchors.left: parent.left
                          anchors.verticalCenter: parent.verticalCenter
                          text: deviceHandler.minHR
                          color: GameSettings.textColor
                          font.pixelSize: GameSettings.hugeFontSize

                          Text {
                              anchors.left: parent.left
                              anchors.bottom: parent.top
                              font.pixelSize: parent.font.pixelSize*0.8
                              color: parent.color
                              text: "MIN"
                          }
                      }

                      Text {
                          anchors.right: parent.right
                          anchors.verticalCenter: parent.verticalCenter
                          text: deviceHandler.maxHR
                          color: GameSettings.textColor
                          font.pixelSize: GameSettings.hugeFontSize

                          Text {
                              anchors.right: parent.right
                              anchors.bottom: parent.top
                              font.pixelSize: parent.font.pixelSize*0.8
                              color: parent.color
                              text: "MAX"
                          }
                      }
                  }

                  Image {
                      id: heart
                      anchors.horizontalCenter: minMaxContainer.horizontalCenter
                      anchors.verticalCenter: minMaxContainer.bottom
                      width: parent.width * 0.2
                      height: width
                      source: "images/heart.png"
                      smooth: true
                      antialiasing: true

                      SequentialAnimation{
                          id: heartAnim
                          running: deviceHandler.alive
                          loops: Animation.Infinite
                          alwaysRunToEnd: true
                          PropertyAnimation { target: heart; property: "scale"; to: 1.2; duration: 500; easing.type: Easing.InQuad }
                          PropertyAnimation { target: heart; property: "scale"; to: 1.0; duration: 500; easing.type: Easing.OutQuad }
                      }
                  }
              }

              Rectangle {
                  id: timeSlider
                  color: GameSettings.viewColor
                  anchors.horizontalCenter: parent.horizontalCenter
                  width: circle.width
                  height: GameSettings.fieldHeight
                  radius: GameSettings.buttonRadius

                  Rectangle {
                      height: parent.height
                      radius: parent.radius
                      color: GameSettings.sliderColor
                      width: Math.min(1.0,__timeCounter / __maxTimeCount) * parent.width
                  }

                  Text {
                      anchors.centerIn: parent
                      color: "gray"
                      text: (__maxTimeCount - __timeCounter).toFixed(0) + " s"
                      font.pixelSize: GameSettings.bigFontSize
                  }
              }
          }

          GameButton {
              id: startButton
              anchors.horizontalCenter: parent.horizontalCenter
              anchors.bottom: parent.bottom
              anchors.bottomMargin: GameSettings.fieldMargin
              width: circle.width
              height: GameSettings.fieldHeight
              enabled: !deviceHandler.measuring
              radius: GameSettings.buttonRadius

              onClicked: start()

              Text {
                  anchors.centerIn: parent
                  font.pixelSize: GameSettings.tinyFontSize
                  text: qsTr("START")
                  color: startButton.enabled ? GameSettings.textColor : GameSettings.disabledTextColor
              }
          }
      }