positioners-attachedproperties.qml Example File

positioners/positioners-attachedproperties.qml
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import QtQuick 2.0

Rectangle {
  width: 320
  height: 480

  // Create column with four rectangles, the fourth one is hidden
  Column {
    id: column

    Rectangle {
      id: red
      color: "red"
      width: 100
      height: 100

      Text {
          anchors.left: parent.right
          anchors.leftMargin: 20
          anchors.verticalCenter: parent.verticalCenter
          text: "Index: " + parent.Positioner.index
          + (parent.Positioner.isFirstItem ? " (First)" : "")
          + (parent.Positioner.isLastItem ? " (Last)" : "")
      }

      // When mouse is clicked, display the values of the positioner
      MouseArea {
        anchors.fill: parent
        onClicked: column.showInfo(red.Positioner)
      }
    }

    Rectangle {
      id: green
      color: "green"
      width: 100
      height: 100

      Text {
          anchors.left: parent.right
          anchors.leftMargin: 20
          anchors.verticalCenter: parent.verticalCenter
          text: "Index: " + parent.Positioner.index
          + (parent.Positioner.isFirstItem ? " (First)" : "")
          + (parent.Positioner.isLastItem ? " (Last)" : "")
      }

      // When mouse is clicked, display the values of the positioner
      MouseArea {
        anchors.fill: parent
        onClicked: column.showInfo(green.Positioner)
      }
    }

    Rectangle {
      id: blue
      color: "blue"
      width: 100
      height: 100

      Text {
          anchors.left: parent.right
          anchors.leftMargin: 20
          anchors.verticalCenter: parent.verticalCenter
          text: "Index: " + parent.Positioner.index
          + (parent.Positioner.isFirstItem ? " (First)" : "")
          + (parent.Positioner.isLastItem ? " (Last)" : "")
      }

      // When mouse is clicked, display the values of the positioner
      MouseArea {
        anchors.fill: parent
        onClicked: column.showInfo(blue.Positioner)
      }
    }

    // This rectangle is not visible, so it doesn't have a positioner value
    Rectangle {
      color: "black"
      width: 100
      height: 100
      visible: false
    }

    // Print the index of the child item in the positioner and convenience
    // properties showing if it's the first or last item.
    function showInfo(positioner) {
      console.log("Item Index = " + positioner.index)
      console.log("  isFirstItem = " + positioner.isFirstItem)
      console.log("  isLastItem = " + positioner.isLastItem)
    }
  }
}