Qt 4.8: NoteButtonView.qml Example File (demos/mobile/guitartuner/src/mycomponents/NoteButtonView.qml)

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# NoteButtonView.qml Example File

demos/mobile/guitartuner/src/mycomponents/NoteButtonView.qml

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the QtDeclarative 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 The Qt Company Ltd 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
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     import QtQuick 1.0

     /* A view component for buttons for choosing notes. */
     ListView {
         id: noteChooser

         property real currentFrequency: 82.407

         signal noteSelected(string note, real frequency, int index)

         //Press down the button corresponding to the given note.
         function pushButton(index) {
             currentIndex = index;
         }

         width: 50*model.count + spacing*(model.count-1); height: 50
         orientation: ListView.Horizontal
         model: NotesModel {}
         delegate: notesDelegate
         keyNavigationWraps: true
         boundsBehavior: Flickable.StopAtBounds

         Component {
             id: notesDelegate

             ToggleButton {
                 id: noteButton

                 width: height; height: noteChooser.height
                 offImageSource: offSource
                 onImageSource: onSource
                 state: noteButton.ListView.isCurrentItem ? "pressed" : "unPressed"
                 onSelected: {
                     noteChooser.noteSelected(note, frequency, index)
                     if (note != "Auto") {
                         currentFrequency = frequency
                     }
                 }
                 onPushed: {
                     noteButton.ListView.view.currentIndex = index
                 }
             }
         }
     }