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     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtDeclarative module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:BSD$

    10 ** You may use this file under the terms of the BSD license as follows:

    11 **

    12 ** "Redistribution and use in source and binary forms, with or without

    13 ** modification, are permitted provided that the following conditions are

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    38 **

    39 ****************************************************************************/

    40 

    41 import Qt 4.7

    42 

    43 Rectangle {

    44     id: page

    45     width: 640; height: 480

    46     color: "Black"

    47 

    48     // Make a ball to bounce

    49     Rectangle {

    50         id: ball

    51 

    52         // Add a property for the target y coordinate

    53         property int targetY : page.height - 10

    54         property variant direction : "right"

    55 

    56         x: 20; width: 20; height: 20; z: 1

    57         color: "Lime"

    58 

    59         // Move the ball to the right and back to the left repeatedly

    60         SequentialAnimation on x {

    61             loops: Animation.Infinite

    62             NumberAnimation { to: page.width - 40; duration: 2000 }

    63             PropertyAction { target: ball; property: "direction"; value: "left" }

    64             NumberAnimation { to: 20; duration: 2000 }

    65             PropertyAction { target: ball; property: "direction"; value: "right" }

    66         }

    67 

    68         // Make y follow the target y coordinate, with a velocity of 200

    69         SpringFollow on y { to: ball.targetY; velocity: 200 }

    70 

    71         // Detect the ball hitting the top or bottom of the view and bounce it

    72         onYChanged: {

    73             if (y <= 0) {

    74                 targetY = page.height - 20;

    75             } else if (y >= page.height - 20) {

    76                 targetY = 0;

    77             }

    78         }

    79     }

    80 

    81     // Place bats to the left and right of the view, following the y

    82     // coordinates of the ball.

    83     Rectangle {

    84         id: leftBat

    85         color: "Lime"

    86         x: 2; width: 20; height: 90

    87         SpringFollow on y {

    88             to: ball.y - 45; velocity: 300

    89             enabled: ball.direction == 'left'

    90         }

    91     }

    92     Rectangle {

    93         id: rightBat

    94         color: "Lime"

    95         x: page.width - 22; width: 20; height: 90

    96         SpringFollow on y {

    97             to: ball.y-45; velocity: 300

    98             enabled: ball.direction == 'right'

    99         }

   100     }

   101 

   102     // The rest, to make it look realistic, if neither ever scores...

   103     Rectangle { color: "Lime"; x: page.width/2-80; y: 0; width: 40; height: 60 }

   104     Rectangle { color: "Black"; x: page.width/2-70; y: 10; width: 20; height: 40 }

   105     Rectangle { color: "Lime"; x: page.width/2+40; y: 0; width: 40; height: 60 }

   106     Rectangle { color: "Black"; x: page.width/2+50; y: 10; width: 20; height: 40 }

   107     Repeater {

   108         model: page.height / 20

   109         Rectangle { color: "Lime"; x: page.width/2-5; y: index * 20; width: 10; height: 10 }

   110     }

   111 }