Warning, /education/kstars/kstars/kstarslite/qml/modules/KSTabBarArrow.qml is written in an unsupported language. File is not indexed.

 // SPDX-FileCopyrightText: 2016 Artem Fedoskin <afedoskin3@gmail.com>
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import QtQuick 2.6
 import QtQuick.Layouts 1.2
 import QtQuick.Controls 2.0
 import "../constants" 1.0
 
 Button {
     z: 1
     id: arrow
     property string imgSource
     property Item tabBar
     property int flickSpeed: 1000
     state: "Invisible"
 
     width:image.width*1.5
     Image {
         id: image
         opacity: 0.6
         anchors{
             verticalCenter: parent.verticalCenter
             horizontalCenter: parent.horizontalCenter
         }
         source: imgSource
     }
 
     background: Rectangle {
         color: "grey"
         opacity: 0.6
     }
 
     onPressedChanged: {
         if(pressed) {
             arrow.background.opacity = 0.3
             tabBar.contentItem.flick(flickSpeed,0)
         } else {
             arrow.background.opacity = 0.6
         }
     }
 
     states: [
         State {
             name: "Visible"
             PropertyChanges{target: arrow; opacity: 1.0}
             PropertyChanges{target: arrow; visible: true}
         },
         State {
             name:"Invisible"
             PropertyChanges{target: arrow; opacity: 0.0}
             PropertyChanges{target: arrow; visible: false}
         }
     ]
 
     transitions: [
             Transition {
                 from: "Visible"
                 to: "Invisible"
 
                 SequentialAnimation{
                    NumberAnimation {
                        target: arrow
                        property: "opacity"
                        duration: arrow
                        easing.type: Easing.InOutQuad
                    }
                    NumberAnimation {
                        target: arrow
                        property: "visible"
                        duration: 50
                    }
                 }
             },
             Transition {
                 from: "Invisible"
                 to: "Visible"
                 SequentialAnimation{
                    NumberAnimation {
                        target: arrow
                        property: "visible"
                        duration: 0
                    }
                    NumberAnimation {
                        target: arrow
                        property: "opacity"
                        duration: 200
                        easing.type: Easing.InOutQuad
                    }
                 }
             }
         ]
 }