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 alias sliderValue: slider.value
     property alias fromValue: slider.from
     property alias toValue: slider.to
     property alias sliderEnabled: slider.enabled
     property alias sliderStepSize: slider.stepSize
     readonly property bool highlight: slider.hovered || slider.pressed

     width: 260
     height: rowLayout.height

     MouseArea {
         anchors.fill: parent
         onPressed: {}
     }

     RowLayout {
         id: rowLayout
         width: parent.width
         Slider {
             id: slider
             from: fromValue
             to: toValue
             stepSize: 0.01
             Layout.minimumWidth: 200
             Layout.fillWidth: true
             background: Rectangle {
                 x: slider.leftPadding
                 y: slider.topPadding + slider.availableHeight / 2 - height / 2
                 implicitWidth: 200
                 implicitHeight: 2
                 width: slider.availableWidth
                 height: implicitHeight
                 color: "#606060"
                 Rectangle {
                     width: slider.visualPosition * parent.width
                     height: parent.height
                     color: "#41cd52"
                 }
             }
             handle: Rectangle {
                 x: slider.leftPadding + slider.visualPosition * (slider.availableWidth - width)
                 y: slider.topPadding + slider.availableHeight / 2 - height / 2
                 implicitWidth: 14
                 implicitHeight: 14
                 radius: width/2
                 color: slider.pressed ? "#ffffff" : "#d0d0d0"
                 border.color: "#d0d0d0"
             }
         }
         Label {
             id: valueText
             text: slider.value.toFixed(2)
             color: "#f0f0f0"
             font.pointSize: settings.fontSizeSmall
             font.bold: true
             Layout.minimumWidth: 60
         }
     }
 }