HintedMouseArea.qml Example File

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  // Mouse area which flashes to indicate its location on the screen

  import QtQuick 2.0

  MouseArea {
      property alias hintColor: hintRect.color
      property bool hintEnabled: true

      Rectangle {
          id: hintRect
          anchors.fill: parent
          color: "yellow"
          opacity: 0

          states: [
              State {
                  name: "high"
                  PropertyChanges {
                      target: hintRect
                      opacity: 0.8
                  }
              },
              State {
                  name: "low"
                  PropertyChanges {
                      target: hintRect
                      opacity: 0.4
                  }
              }
          ]

          transitions: [
              Transition {
                  from: "low"
                  to: "high"
                  SequentialAnimation {
                      NumberAnimation {
                          properties: "opacity"
                          easing.type: Easing.InOutSine
                          duration: 500
                      }
                      ScriptAction { script: hintRect.state = "low" }
                  }
              },
              Transition {
                  from: "*"
                  to: "low"
                  SequentialAnimation {
                      NumberAnimation {
                          properties: "opacity"
                          easing.type: Easing.InOutSine
                          duration: 500
                      }
                      ScriptAction { script: hintRect.state = "high" }
                  }
              },
              Transition {
                  from: "*"
                  to: "baseState"
                  NumberAnimation {
                      properties: "opacity"
                      easing.type: Easing.InOutSine
                      duration: 500
                  }
              }
          ]
      }

      onHintEnabledChanged: hintRect.state = hintEnabled ? "low" : "baseState"

      Component.onCompleted: hintRect.state = "low"
  }