qml/SheetMusicView/Note.qml

0001 /****************************************************************************
0002 **
0003 ** Copyright (C) 2017 by Sandro S. Andrade <sandroandrade@kde.org>
0004 **
0005 ** This program is free software; you can redistribute it and/or
0006 ** modify it under the terms of the GNU General Public License as
0007 ** published by the Free Software Foundation; either version 2 of
0008 ** the License or (at your option) version 3 or any later version
0009 ** accepted by the membership of KDE e.V. (or its successor approved
0010 ** by the membership of KDE e.V.), which shall act as a proxy
0011 ** defined in Section 14 of version 3 of the license.
0012 **
0013 ** This program is distributed in the hope that it will be useful,
0014 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
0015 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0016 ** GNU General Public License for more details.
0017 **
0018 ** You should have received a copy of the GNU General Public License
0019 ** along with this program.  If not, see <http://www.gnu.org/licenses/>.
0020 **
0021 ****************************************************************************/
0022
0023 import QtQuick 2.7
0024
0025 BravuraText {
0026     id: note
0027
0028     property int number;
0029     property int octave;
0030     property int midiKey;
0031     property int rhythm: 4;
0032     property int accident: 0 // [-2 double flat, -1 flat, 1 sharp, 2 double sharp]
0033     property bool spaced: true
0034
0035     objectName: "symbol"
0036
0037     onNumberChanged: {
0038         if (!internal.updating) {
0039             internal.updating = true;
0040             midiKey = 24 + (12*(octave-1))+number+accident;
0041             internal.updating = false
0042         }
0043     }
0044     onOctaveChanged: {
0045         if (!internal.updating) {
0046             internal.updating = true;
0047             midiKey = 24 + (12*(octave-1))+number+accident;
0048             internal.updating = false
0049         }
0050     }
0051     onAccidentChanged: {
0052         if (!internal.updating) {
0053             internal.updating = true;
0054             midiKey = 24 + (12*(octave-1))+number+accident;
0055             internal.updating = false
0056         }
0057     }
0058     onMidiKeyChanged: {
0059         if (!internal.updating) {
0060             internal.updating = true;
0061             number = (midiKey % 12);
0062             octave = (((midiKey-24) - number) / 12) + 1;
0063             accident = internal.accidentMap[number][1];
0064             internal.updating = false
0065         }
0066     }
0067
0068     QtObject {
0069         id: internal
0070
0071         property bool updating: false;
0072         property var accidentMap: [
0073             // [vertical offset, accident]
0074             [0, 0],
0075             [0, 1],
0076             [1, 0],
0077             [1, 1],
0078             [2, 0],
0079             [3, 0],
0080             [3, 1],
0081             [4, 0],
0082             [4, 1],
0083             [5, 0],
0084             [5, 1],
0085             [6, 0],
0086         ]
0087
0088         function itemIndex(item) {
0089             if (item.parent == null)
0090                 return -1
0091             var siblings = item.parent.children
0092             for (var i = siblings.length - 1; i >=0 ; i--)
0093                 if (siblings[i] == item)
0094                     return i
0095             return -1 // will never happen
0096         }
0097         function previousItem(item) {
0098             if (item.parent == null)
0099                 return null
0100             var siblings = item.parent.children
0101             for (var i = itemIndex(item) - 1; i >=0 ; i--)
0102                 if (siblings[i].objectName == "symbol")
0103                     return item.parent.children[i]
0104             return null
0105         }
0106
0107         property var rhythmTable: { "1": "\ue1d2", "2": "\ue1d3", "4": "\ue1d5", "8": "\ue1d7", "16": "\ue1d9", "32": "\ue1db", "64": "\ue1dd" }
0108     }
0109
0110     anchors {
0111         bottom: parent.children[0].bottom;
0112         bottomMargin: {
0113             (parent.clef.type == 0) ?
0114                 ((internal.accidentMap[number][0])*5)+(octave-4)*35
0115                 :
0116                 -10+((internal.accidentMap[number][0])*5)+(octave-2)*35;
0117         }
0118         left: spaced ? internal.previousItem(note).right:internal.previousItem(note).left;
0119         leftMargin: spaced ? parent.spacing:0
0120     }
0121     text: ((accident == -1) ? "\ue260":(accident == 1) ? "\ue262":(accident == -2) ? "\ue264":(accident == 2) ? "\ue263":" ") + internal.rhythmTable[rhythm]
0122     font.pixelSize: 35
0123 }