title: Creating a horizontal Tumbler or circular SwipeView in QML
body: <p>I'd like to replace a <code>SwipeView</code> with an <code>Tumbler</code> in QML as I prefer the notion, that there is no first and no last <code>Item</code>.
  The problem is, I can't find any other way to get this <code>Tumbler</code> tumble horizontally instead of vertically, but to rotate it by -90° and then rotate the <code>Item</code>s back by +90°</p>
  
  <p>This is my code so far, and works as expected:</p>
  
  <pre><code>import QtQuick 2.5
  import QtQuick.Controls 2.0
  import QtQuick.Window 2.2
  
  Window {
      id: root
      visible: true
      width: 640
      height: 480
  
      Row {
          id: buttons
          spacing: 2
          Button {
              text: '0'
              onClicked: tumbl.currentIndex = 0
          }
          Button {
              text: '1'
              onClicked: tumbl.currentIndex = 1
          }
          Button {
              text: '2'
              onClicked: tumbl.currentIndex = 2
          }
          Button {
              text: '3'
              onClicked: tumbl.currentIndex = 3
          }
      }
  
      Tumbler {
          id: tumbl
          rotation: -90 // &lt;---- Rotate there
          anchors {
              top: buttons.bottom
              left: buttons.left
              right: buttons.right
              bottom: parent.bottom
          }
          model: 4
          delegate: Rectangle {
              rotation: 90 // &lt;---- Rotate back
              color: 'red'
              border.width: 15
              Text {
                  anchors.centerIn: parent
                  text: index
              }
          }
          visibleItemCount: 1
          Component.onCompleted: contentItem.interactive = false
      }
  }
  </code></pre>
  
  <p>You can see the two lines, in which I do the rotation marked with a comment.<br>
  Does anybody know a way to either produce this circular behavior with a <code>SwipeView</code> or to change the tumble-orientation of the tumbler without this rotation trick?</p>