- Qt 5.3
- Qt Quick
- Qt Quick Examples - Animation
- pathinterpolator.qml Example File
- Qt 5.3.2 Reference Documentation

# pathinterpolator.qml Example File

animation/pathinterpolator/pathinterpolator.qml

    /****************************************************************************
    **
    ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
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    **     of its contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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    import QtQuick 2.0

    Rectangle {
        id: window
        width: 320
        height: 480

        Canvas {
            id: canvas
            anchors.fill: parent
            antialiasing: true

            onPaint: {
                var context = canvas.getContext("2d")
                context.clearRect(0, 0, width, height)
                context.strokeStyle = "black"
                context.path = motionPath.path
                context.stroke()
            }
        }

        PathInterpolator {
            id: motionPath

            path: Path {
                startX: 50; startY: 50

                PathCubic {
                    x: window.width - 50
                    y: window.height - 50

                    control1X: x; control1Y: 50
                    control2X: 50; control2Y: y
                }

                onChanged: canvas.requestPaint()
            }

            SequentialAnimation on progress {
                running: true
                loops: -1
                PauseAnimation { duration: 1000 }
                NumberAnimation {
                    id: progressAnim
                    running: false
                    from: 0; to: 1
                    duration: 2000
                    easing.type: Easing.InQuad
                }
            }
        }

        Rectangle {
            id: box

            width: 50; height: 50
            border.width: 1
            antialiasing: true

            //bind our attributes to follow the path as progress changes
            x: motionPath.x
            y: motionPath.y
            rotation: motionPath.angle
            transform: Translate { x: -box.width/2; y: -box.height/2 }

            Text {
                anchors.centerIn: parent
                text: "Box"
            }
        }
    }