- Qt 5.5
- Qt Sensors
- Qt Sensors - Grue Sensor Example
- grue.qml Example File
- Qt 5.5.1 Reference Documentation

# grue.qml Example File

grue/grue.qml

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the QtSensors 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
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    **     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 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 } }
        }
    }