New Courtesy Accidentals plugin

share/extensions/courtesy_accidentals/README.md

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+# Courtesy Accidentals
+A plugin for MuseScore 4 that adds courtesy accidentals to your score.
+Choose from a wide range of settings, to control when to add them and how they look!
+
+## Features
+- Add or remove courtesy accidentals from your score
+- Choose from a wide variety of settings
+- Live updating settings previews, to show you exactly what you get
+- Sleek & modern UI styled after MuseScore 4

share/extensions/courtesy_accidentals/assets/AddAccItem.qml

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+//==============================================
+//  Cautionary Accidentals v4.0
+//  https://github.com/XiaoMigros/Cautionary-Accidentals
+//  Copyright (C)2023 XiaoMigros
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//==============================================
+
+import QtQuick 2.9
+import QtQuick.Layouts 1.2
+import MuseScore.Ui 1.0
+import MuseScore.UiComponents 1.0 as MU
+
+Item {
+    id: root
+
+    height: bracketBox.height //childrenRect.height
+    //requires indicated width
+
+    property alias checked: checkBox.checked
+    property alias currentValue: bracketBox.currentValue
+
+    signal clicked
+    signal setv(bool checked, int value)
+
+    MU.CheckBox {
+        id: checkBox
+        anchors.left: parent.left
+        anchors.verticalCenter: parent.verticalCenter
+        text: qsTr("Add Courtesy Accidentals")
+        onClicked: {checked = !checked; root.clicked()}
+        signal setv(bool checked)
+        onSetv: function(value) {checked = value; root.clicked()}
+    }
+    BracketBox {
+        id: bracketBox
+        anchors.right: parent.right
+        anchors.verticalCenter: parent.verticalCenter
+        enabled: checkBox.checked
+        onActivated: root.clicked()
+    }
+    onSetv: function(checked, value) {
+        checkBox.setv(checked)
+        bracketBox.setv(value)
+    }
+}