QML Video Shader Effects Example

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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"
}