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    41 

    42 import Qt 4.7

    43 

    44 Item {

    45     id: container

    46 

    47     property variant flickableArea

    48 

    49     Rectangle {

    50         radius: 5

    51         color: "black"

    52         opacity: 0.3

    53         border.color: "white"

    54         border.width: 2

    55         x: 0

    56         y: flickableArea.visibleArea.yPosition * container.height

    57         width: parent.width

    58         height: flickableArea.visibleArea.heightRatio * container.height

    59     }

    60     states: [

    61         State {

    62             name: "show"

    63             when: flickableArea.movingVertically

    64             PropertyChanges {

    65                 target: container

    66                 opacity: 1

    67             }

    68         }

    69     ]

    70     transitions: [

    71         Transition {

    72             from: "*"

    73             to: "*"

    74             NumberAnimation {

    75                 target: container

    76                 properties: "opacity"

    77                 duration: 400

    78             }

    79         }

    80     ]

    81 }