grue.qml Example File | QtSensors 5.3

- Qt 5.3
- Qt Sensors
- Qt Sensors - Grue Sensor Example
- grue.qml Example File
- Qt 5.3.2 Reference Documentation

# grue.qml Example File

grue/grue.qml

    /****************************************************************************
    **
    ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** 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
    **     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.
    **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
    **     of its contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
    **
    **
    ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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    ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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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 } }
        }
    }