Qt 5.11 | Qt Sensors | Qt Sensors - Grue Sensor Example | grue.qml Example File

Qt 5.11.3 Reference Documentation

# grue.qml Example File

grue/grue.qml

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      import QtQuick 2.0
      import QtSensors 5.0
      import Grue 1.0

      Rectangle {
          id: root
          width: 320
          height: 480
          color: "black"

          property int percent: 0
          property string text: ""
          property real grueOpacity: 0.0

          function updateStatus(newPercent, newOpacity, newText) {
              if (root.percent === newPercent)
                  return;

              // Delay updating the visual status to prevent flicker
              timer.interval = (newPercent < root.percent) ? 500 : 0;

              root.percent = newPercent;
              root.text = newText;
              root.grueOpacity = newOpacity;

              timer.start()
          }

          Timer {
              id: timer
              running: false
              repeat: false
              onTriggered: {
                  text.text = root.text
                  grueimg.opacity = root.grueOpacity
              }
          }

          GrueSensor {
              id: sensor
              active: true
              onReadingChanged: {
                  var percent = reading.chanceOfBeingEaten;
                  if (percent === 0) {
                      updateStatus(percent, 0.0, "It is light.<br>You are safe from Grues.");
                  }
                  else if (percent === 100) {
                      updateStatus(percent, 1.0, "You have been eaten by a Grue!");
                      sensor.active = false;
                  }
                  else if (percent > 0) {
                      updateStatus(percent, 0.05 + (percent * 0.001),
                                   "It is dark.<br>You are " + percent +" % " +
                                   "likely to be eaten by a Grue.");
                  }
              }
          }

          Text {
              id: text
              anchors.top: parent.top
              anchors.topMargin: 0
              anchors.left: parent.left
              anchors.right: parent.right
              wrapMode: Text.WordWrap
              text: "I can't tell if you're going to be eaten by a Grue or not. You're on your own!"
              font.pixelSize: 30
              color: "lightgray"
          }

          Image {
              id: grueimg
              anchors.bottom: parent.bottom
              anchors.horizontalCenter: parent.horizontalCenter
              source: "grue.png"
              opacity: 0.0
              Behavior on opacity { PropertyAnimation { duration: 250 } }
          }
      }