Qt Reference Documentation

# DropShadow.qml Example File

declarative/shadereffects/qml/shadereffects/DropShadow.qml

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     import QtQuick 1.0

     Item {
         id: main
         anchors.fill: parent

         Image {
             id: background
             anchors.fill: parent
             source: "images/bg.jpg"
         }

         DropShadowEffect {
             id: layer

             property real distance: 0.0

             width: photo.width
             height: photo.height
             sourceItem: photo
             color: "black"
             blur: distance / 10.0
             opacity: 1 - distance / 50.0

             Binding {
                 target: layer
                 property: "x"
                 value: -0.4 * layer.distance
                 when: !dragArea.pressed
             }
             Binding {
                 target: layer
                 property: "y"
                 value: 0.9 * layer.distance
                 when: !dragArea.pressed
             }

             SequentialAnimation on distance {
                 id: animation
                 running: true
                 loops:  Animation.Infinite

                 NumberAnimation { to: 30; duration: 2000 }
                 PauseAnimation { duration: 500 }
                 NumberAnimation { to: 0; duration: 2000 }
                 PauseAnimation { duration: 500 }
             }
         }

         Image {
             id: photo
             anchors.fill: parent
             source: "images/drop_shadow.png"
             smooth: true
         }

         MouseArea {
             id: dragArea
             anchors.fill: parent

             property int startX
             property int startY

             onPressed: {
                 startX = mouseX
                 startY = mouseY
             }

             onPositionChanged: {
                 layer.x += mouseX - startX
                 layer.y += mouseY - startY
                 startX = mouseX
                 startY = mouseY
             }
         }
     }