Qt Quick Examples - Animation

/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

import QtQuick 2.0

Rectangle {
    width: 320; height: 480
    color: "#343434"

    Rectangle {
        anchors.centerIn: parent
        width: 200; height: 200
        radius: 30
        color: "transparent"
        border.width: 4; border.color: "white"

        SideRect {
            id: leftRect
            anchors { verticalCenter: parent.verticalCenter; horizontalCenter: parent.left }
            text: "Left"
        }

        SideRect {
            id: rightRect
            anchors { verticalCenter: parent.verticalCenter; horizontalCenter: parent.right }
            text: "Right"
        }

        SideRect {
            id: topRect
            anchors { verticalCenter: parent.top; horizontalCenter: parent.horizontalCenter }
            text: "Top"
        }

        SideRect {
            id: bottomRect
            anchors { verticalCenter: parent.bottom; horizontalCenter: parent.horizontalCenter }
            text: "Bottom"
        }

        Rectangle {
            id: focusRect

            property string text

            x: 62; y: 75; width: 75; height: 50
            radius: 6
            border.width: 4; border.color: "white"
            color: "firebrick"

            // Set an 'elastic' behavior on the focusRect's x property.
            Behavior on x {
                NumberAnimation { easing.type: Easing.OutElastic; easing.amplitude: 3.0; easing.period: 2.0; duration: 300 }
            }

            // Set an 'elastic' behavior on the focusRect's y property.
            Behavior on y {
                NumberAnimation { easing.type: Easing.OutElastic; easing.amplitude: 3.0; easing.period: 2.0; duration: 300 }
            }

            Text {
                id: focusText
                text: focusRect.text
                anchors.centerIn: parent
                color: "white"
                font.pixelSize: 16; font.bold: true

                // Set a behavior on the focusText's x property:
                // Set the opacity to 0, set the new text value, then set the opacity back to 1.
                Behavior on text {
                    SequentialAnimation {
                        NumberAnimation { target: focusText; property: "opacity"; to: 0; duration: 150 }
                        NumberAnimation { target: focusText; property: "opacity"; to: 1; duration: 150 }
                    }
                }
            }
        }
    }
}