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function BallObject(ball) { | ||
var ballDiv = ball; | ||
var curXpos = 0; | ||
var curYpos = 0; | ||
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this.moveHorizontal = moveHorizontal; | ||
this.moveVertical = moveVertical; | ||
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function moveHorizontal( pixels ) { | ||
curXpos = curXpos + pixels; | ||
ballDiv.css("left", curXpos+"px"); | ||
} | ||
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function moveVertical(pixels) { | ||
curYpos = curYpos + pixels; | ||
ballDiv.css("top",curYpos+"px"); | ||
} | ||
} |
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<html> | ||
<head> | ||
<title>TurtleBall</title> | ||
<link rel="stylesheet" type="text/css" href="style.css"/> | ||
<script type="text/javascript" src="jquery-1.10.2.min.js"></script> | ||
<script type="text/javascript" src="TurtleBall.js"></script> | ||
<script type="text/javascript" src="BallObject.js"></script> | ||
</head> | ||
<body> | ||
<button id="btnUp">Up</button> | ||
<button id="btnDown">Down</button> | ||
<button id="btnLeft">Left</button> | ||
<button id="btnRight">Right</button> | ||
<div id="ballDiv"><img src="CoderDojo-ball.png" width='50px' height='50px'/></div> | ||
</body> | ||
</html> |
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var ball; | ||
$(document).ready(function() { | ||
ball = new BallObject($("#ballDiv")); | ||
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$("#btnUp").click(function() { | ||
ball.moveVertical(-10); | ||
}); | ||
$("#btnDown").click(function() { | ||
ball.moveVertical(10); | ||
}); | ||
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$("#btnLeft").click(function() { | ||
ball.moveHorizontal(-10); | ||
}); | ||
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$("#btnRight").click(function() { | ||
ball.moveHorizontal(10); | ||
}); | ||
}); |
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#ballDiv { | ||
position: absolute; | ||
} |