Qt Quick 3D - Particles 3D Testbed Example

 /****************************************************************************
 **
 ** Copyright (C) 2021 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, 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
 ** 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,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts

 Item {
     id: rootItem
     property real showState: settings.showSettingsView ? 1.0 : 0.0

     default property alias content: settingsArea.children

     width: settingsDrawer.width
     height: settingsDrawer.height

     Button {
         x: (settingsDrawer.visible) ? settingsDrawer.x - width : rootWindow.width - width
         anchors.top: parent.top
         width: rootWindow.iconSize
         height: width
         opacity: showState * 0.6 + 0.4
         visible: opacity
         icon.width: width * 0.3
         icon.height: height * 0.3
         icon.source: "qrc:/qml/images/icon_settings.png"
         icon.color: "transparent"
         background: Rectangle {
             color: "transparent"
         }
         onClicked: {
             settings.showSettingsView = !settings.showSettingsView;
         }
     }

     Drawer {
         id: settingsDrawer
         modal: false
         edge: Qt.RightEdge
         interactive: false
         leftInset: -10
         topInset: -20
         bottomInset: -20
         topMargin: 10
         visible: settings.showSettingsView

         background: Rectangle {
             color: "#80404040"
             border.color: "#000000"
             border.width: 1
             opacity: 0.8
         }

         Column {
             id: settingsArea
         }
         enter: Transition {
             NumberAnimation {
                 property: "position"
                 to: 1.0
                 duration: 800
                 easing.type: Easing.InOutQuad
             }
         }

         exit: Transition {
             NumberAnimation {
                 property: "position"
                 to: 0.0
                 duration: 800
                 easing.type: Easing.InOutQuad
             }
         }
     }
 }