grue.qml Example File

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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 } }
      }
  }