Switch.qml Example File

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  import QtQuick 2.8
  import QtQuick.Templates 2.1 as T
  import Theme 1.0

  T.Switch {
      id: control

      implicitWidth: indicator.implicitWidth
      implicitHeight: background.implicitHeight

      background: Rectangle {
          implicitWidth: 140
          implicitHeight: Theme.baseSize * 3.8
          color: Theme.lightGray
          border.color: Theme.gray
      }

      leftPadding: 4

      indicator: Rectangle {
          id: switchHandle
          implicitWidth: Theme.baseSize * 4.8
          implicitHeight: Theme.baseSize * 2.6
          x: control.leftPadding
          anchors.verticalCenter: parent.verticalCenter
          radius: Theme.baseSize * 1.3
          color: Theme.light
          border.color: Theme.lightGray

          Rectangle {
              id: rectangle

              width: Theme.baseSize * 2.6
              height: Theme.baseSize * 2.6
              radius: Theme.baseSize * 1.3
              color: Theme.light
              border.color: Theme.gray
          }

          states: [
              State {
                  name: "off"
                  when: !control.checked && !control.down
              },
              State {
                  name: "on"
                  when: control.checked && !control.down

                  PropertyChanges {
                      target: switchHandle
                      color: Theme.mainColor
                      border.color: Theme.mainColor
                  }

                  PropertyChanges {
                      target: rectangle
                      x: parent.width - width

                  }
              },
              State {
                  name: "off_down"
                  when: !control.checked && control.down

                  PropertyChanges {
                      target: rectangle
                      color: Theme.light
                  }

              },
              State {
                  name: "on_down"
                  extend: "off_down"
                  when: control.checked && control.down

                  PropertyChanges {
                      target: rectangle
                      x: parent.width - width
                      color: Theme.light
                  }

                  PropertyChanges {
                      target: switchHandle
                      color: Theme.mainColorDarker
                      border.color: Theme.mainColorDarker
                  }
              }
          ]
      }
  }