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+/****************************************************************************
+**
+** Copyright (C) 2021 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 2.12
+import "components"
+
+Rectangle {
+ id: root
+ width: 640
+ height: 480
+ color: "black"
+
+ Repeater {
+ model: 2
+
+ Image {
+ id: ball
+ objectName: "ball" + index
+ source: "images/redball.png"
+ property real homeX: 200 + index * 200
+ property real homeY: 200
+ width: 80; height: 80; x: homeX; y: 200
+
+ Text {
+ anchors.centerIn: parent
+ color: "white"
+ text: momentum.velocity.x.toFixed(2) + "," + momentum.velocity.y.toFixed(2)
+ }
+
+ SequentialAnimation {
+ id: anim
+
+ function restart(vel) {
+ stop()
+ momentum.velocity = vel
+ start()
+ }
+
+ MomentumAnimation { id: momentum; target: ball }
+
+ PauseAnimation { duration: 500 }
+
+ ParallelAnimation {
+ id: ballReturn
+ NumberAnimation {
+ target: ball
+ property: "x"
+ to: homeX
+ duration: 1000
+ easing.period: 50
+ easing.type: Easing.OutElastic
+ }
+ NumberAnimation {
+ target: ball
+ property: "y"
+ to: homeY
+ duration: 1000
+ easing.type: Easing.OutElastic
+ }
+ }
+ }
+
+ DragHandler {
+ id: dragHandler
+ objectName: "dragHandler" + index
+ onActiveChanged: {
+ if (!active)
+ anim.restart(centroid.velocity)
+ }
+ }
+ Rectangle {
+ visible: dragHandler.active
+ anchors.fill: parent
+ anchors.margins: -5
+ radius: width / 2
+ opacity: 0.25
+ }
+
+ Rectangle {
+ visible: width > 0
+ width: dragHandler.centroid.velocity.length() / 10
+ height: 2
+ x: ball.width / 2
+ y: ball.height / 2
+ z: -1
+ rotation: Math.atan2(dragHandler.centroid.velocity.y, dragHandler.centroid.velocity.x) * 180 / Math.PI
+ transformOrigin: Item.BottomLeft
+ antialiasing: true
+
+ Image {
+ source: "images/arrowhead.png"
+ anchors.right: parent.right
+ anchors.verticalCenter: parent.verticalCenter
+ width: 16
+ height: 12
+ antialiasing: true
+ }
+ }
+ }
+ }
+}