- Qt 5.3
- Qt Quick
- Qt Quick Examples - Threading
- workerscript.qml Example File
- Qt 5.3.2 Reference Documentation

# workerscript.qml Example File

threading/workerscript/workerscript.qml

    /****************************************************************************
    **
    ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the examples 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.
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    **
    ** 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
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    ****************************************************************************/

    import QtQuick 2.0

    Rectangle {
        width: 320; height: 480

        WorkerScript {
            id: myWorker
            source: "workerscript.js"

            onMessage: {
                if (messageObject.row == rowSpinner.value && messageObject.column == columnSpinner.value){ //Not an old result
                    if (messageObject.result == -1)
                        resultText.text = "Column must be <= Row";
                    else
                        resultText.text = messageObject.result;
                }
            }
        }
        Row {
            y: 24
            spacing: 24
            anchors.horizontalCenter: parent.horizontalCenter
            Spinner {
                id: rowSpinner
                label: "Row"
                onValueChanged: {
                    resultText.text = "Loading...";
                    myWorker.sendMessage( { row: rowSpinner.value, column: columnSpinner.value } );
                }
            }

            Spinner {
                id: columnSpinner
                label: "Column"
                onValueChanged: {
                    resultText.text = "Loading...";
                    myWorker.sendMessage( { row: rowSpinner.value, column: columnSpinner.value } );
                }
            }
        }

        Text {
            id: resultText
            y: 180
            width: parent.width
            horizontalAlignment: Text.AlignHCenter
            wrapMode: Text.WordWrap
            font.pixelSize: 32
        }

        Text {
            text: "Pascal's Triangle Calculator"
            anchors { horizontalCenter: parent.horizontalCenter; bottom: parent.bottom; bottomMargin: 50 }
        }
    }