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import QtQuick 2.0
//! [1]
import MetalTextureImport 1.0
//! [1]

Rectangle {
    gradient: Gradient {
        GradientStop { position: 0; color: "steelblue" }
        GradientStop { position: 1; color: "black" }
    }

    //! [2]
    CustomTextureItem {
        id: renderer
        anchors.fill: parent
        anchors.margins: 10

        SequentialAnimation on t {
            NumberAnimation { to: 1; duration: 2500; easing.type: Easing.InQuad }
            NumberAnimation { to: 0; duration: 2500; easing.type: Easing.OutQuad }
            loops: Animation.Infinite
            running: true
        }
    //! [2]

        transform: [
            Rotation { id: rotation; axis.x: 0; axis.z: 0; axis.y: 1; angle: 0; origin.x: renderer.width / 2; origin.y: renderer.height / 2; },
            Translate { id: txOut; x: -renderer.width / 2; y: -renderer.height / 2 },
            Scale { id: scale; },
            Translate { id: txIn; x: renderer.width / 2; y: renderer.height / 2 }
        ]
    }

    SequentialAnimation {
        PauseAnimation { duration: 5000 }
        ParallelAnimation {
            NumberAnimation { target: scale; property: "xScale"; to: 0.6; duration: 1000; easing.type: Easing.InOutBack }
            NumberAnimation { target: scale; property: "yScale"; to: 0.6; duration: 1000; easing.type: Easing.InOutBack }
        }
        NumberAnimation { target: rotation; property: "angle"; to: 80; duration: 1000; easing.type: Easing.InOutCubic }
        NumberAnimation { target: rotation; property: "angle"; to: -80; duration: 1000; easing.type: Easing.InOutCubic }
        NumberAnimation { target: rotation; property: "angle"; to: 0; duration: 1000; easing.type: Easing.InOutCubic }
        NumberAnimation { target: renderer; property: "opacity"; to: 0.1; duration: 1000; easing.type: Easing.InOutCubic }
        PauseAnimation { duration: 1000 }
        NumberAnimation { target: renderer; property: "opacity"; to: 1.0; duration: 1000; easing.type: Easing.InOutCubic }
        ParallelAnimation {
            NumberAnimation { target: scale; property: "xScale"; to: 1; duration: 1000; easing.type: Easing.InOutBack }
            NumberAnimation { target: scale; property: "yScale"; to: 1; duration: 1000; easing.type: Easing.InOutBack }
        }
        running: true
        loops: Animation.Infinite
    }

    Rectangle {
        id: labelFrame
        anchors.margins: -10
        radius: 5
        color: "white"
        border.color: "black"
        opacity: 0.5
        anchors.fill: label
    }

    Text {
        id: label
        anchors.bottom: renderer.bottom
        anchors.left: renderer.left
        anchors.right: renderer.right
        anchors.margins: 20
        wrapMode: Text.WordWrap
        text: "The squircle, using rendering code borrowed from the metalunderqml example, is rendered into a texture directly with Metal. The MTLTexture is then imported and used in a custom Qt Quick item."
    }
}