Navibutton.qml Example File

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 import QtQuick 2.0
 import QtQuick.Layouts 1.1

 Text {
     id: menubarItem
     text: ""
     font.family: "Helvetica"
     font.pointSize: 20
     font.weight: Font.Light
     color: "#404244"
     Layout.alignment: Qt.AlignHCenter
     state: "default"
     verticalAlignment: Text.AlignVCenter
     property bool selected: false
     property string stateSelect: ""
     property Item stateTarget

     states: [
         State {
             name: "default"
             when: !menubarItem.selected
             PropertyChanges { target: menubarItem; color: "#404244"; }
             PropertyChanges { target: selectedHighlight; height: 0; }
         },
         State {
             name: "mouseover"
             PropertyChanges { target: menubarItem; color: "#5caa15"; }
             PropertyChanges { target: selectedHighlight; height: 4; }
         },
         State {
             name: "selected"
             when: menubarItem.selected
             PropertyChanges { target: menubarItem; color: "#5caa15"; }
             PropertyChanges { target: selectedHighlight; height: 4; }
         }
     ]

     onStateChanged: {
         if (state == "selected") {
             menubarItem.stateTarget.state = menubarItem.stateSelect;
         }
     }

     transitions: [
         Transition {
             from: "*"
             to: "*"
             ColorAnimation {
                 properties: "color"
                 easing.type: Easing.InOutCubic
                 duration: 250
             }
         }
     ]

     Rectangle {
         id: selectedHighlight
         color: "#7cc54d"
         width: parent.width
         anchors.bottom: parent.bottom
         height: 0

         Behavior on height {

                     NumberAnimation {
                         easing.type: Easing.InOutCubic
                         duration: 250
                     }
                 }
     }

     MouseArea {
         id: mouseArea
         anchors.fill: parent
         hoverEnabled: true

         onPressed: {
             menubarItem.state = "mouseover";
         }

         onReleased: {
             if (menubarItem.state == "mouseover") {
                 menubarItem.selected = true;
             }
         }

         onEntered: {
             menubarItem.state = "mouseover";
         }

         onExited: {
             if (menubarItem.selected) {
                 menubarItem.state = "selected";
             } else {
                 menubarItem.state = "default";
             }
         }
     }
 }