qt-everywhere-src-5.15.1/qtdeclarative/examples/quick/imageelements/animatedimage.qml

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import QtQuick 2.12
import "../shared" as Examples

Column {
    width: 320
    height: 480
    spacing: 6
    y: 12

//! [image]
    AnimatedImage {
        id: animation
        source: "content/Uniflow_steam_engine.gif"
        anchors.horizontalCenter: parent.horizontalCenter
        speed: speedSlider.value
        TapHandler {
            onTapped: animation.playing = !animation.playing
        }
    }
//! [image]

    Rectangle {
        id: timeline
        color: "steelblue"
        width: animation.width
        height: 1
        x: animation.x
        y: animation.height + 12
        visible: animation.playing

        Rectangle {
            property int frames: animation.frameCount
            width: 4; height: 8
            x: (animation.width - width) * animation.currentFrame / frames
            y: -4
            color: "red"
        }
    }

    Examples.Slider {
        id: speedSlider
        name: "Speed"
        min: 0
        max: 5
        init: 1
        width: 240
        x: animation.x
        Text {
            font.pointSize: 12
            text: Math.round(animation.speed * 100) + "%"
            x: animation.width - width
            anchors.verticalCenter: parent.verticalCenter
            anchors.margins: 6
        }
    }

    Examples.Button {
        text: "Reset"
        enabled: speedSlider.value !== 1
        anchors.horizontalCenter: parent.horizontalCenter
        onClicked: {
            speedSlider.setValue(1)
            animation.playing = true
        }
    }
}