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<!--
Winhweel.js basic code wheel example by Douglas McKechie @ www.dougtesting.net
See website for tutorials and other documentation.
The MIT License (MIT)
Copyright (c) 2016 Douglas McKechie
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<html>
<head>
<title>HTML5 Canvas Winning Wheel</title>
<link rel="stylesheet" href="main.css" type="text/css" />
<script type="text/javascript" src="../../Winwheel.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/gsap/latest/TweenMax.min.js"></script>
</head>
<body>
<div align="center">
<h1>Winwheel.js example wheel - basic image wheel</h1>
<p>Here is an example of a basic image drawn wheel, where the entire face of the wheel has been created out of a graphically rich image.</p>
<br />
<p>Choose a power setting then press the Spin button. You will be alerted to the prize won when the spinning stops.</p>
<br />
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td>
<div class="power_controls">
<br />
<br />
<table class="power" cellpadding="10" cellspacing="0">
<tr>
<th align="center">Power</th>
</tr>
<tr>
<td width="78" align="center" id="pw3" onClick="powerSelected(3);">High</td>
</tr>
<tr>
<td align="center" id="pw2" onClick="powerSelected(2);">Med</td>
</tr>
<tr>
<td align="center" id="pw1" onClick="powerSelected(1);">Low</td>
</tr>
</table>
<br />
<img id="spin_button" src="spin_off.png" alt="Spin" onClick="startSpin();" />
<br /><br />
&nbsp;&nbsp;<a href="#" onClick="resetWheel(); return false;">Play Again</a><br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(reset)
</div>
</td>
<td width="318" height="418" class="the_wheel" align="center" valign="center">
<canvas id="canvas" width="315" height="418">
<p style="{color: white}" align="center">Sorry, your browser doesn't support canvas. Please try another.</p>
</canvas>
</td>
</tr>
</table>
</div>
<script>
// Create new wheel object specifying the parameters at creation time.
var theWheel = new Winwheel({
'numSegments' : 4, // Specify number of segments.
'outerRadius' : 150, // Set outer radius so wheel fits inside the background.
'drawMode' : 'image', // drawMode must be set to image.
'drawText' : true, // Need to set this true if want code-drawn text on image wheels.
'textFontSize' : 12, // Set text options as desired.
'textOrientation' : 'curved',
'textDirection' : 'reversed',
'textAlignment' : 'outer',
'textMargin' : 5,
'textFontFamily' : 'monospace',
'textStrokeStyle' : 'black',
'textLineWidth' : 2,
'textFillStyle' : 'white',
'segments' : // Define segments.
[
{'text' : 'T-55 Vampire'},
{'text' : 'P-40 Kittyhawk'},
{'text' : 'North American Harvard'},
{'text' : 'L-39C Albatross'}
],
'animation' : // Specify the animation to use.
{
'type' : 'spinToStop',
'duration' : 5, // Duration in seconds.
'spins' : 8, // Number of complete spins.
'callbackFinished' : alertPrize
}
});
// Create new image object in memory.
var loadedImg = new Image();
// Create callback to execute once the image has finished loading.
loadedImg.onload = function()
{
theWheel.wheelImage = loadedImg; // Make wheelImage equal the loaded image object.
theWheel.draw(); // Also call draw function to render the wheel.
}
// Set the image source, once complete this will trigger the onLoad callback (above).
loadedImg.src = "planes.png";
// Vars used by the code in this page to do power controls.
var wheelPower = 0;
var wheelSpinning = false;
// -------------------------------------------------------
// Function to handle the onClick on the power buttons.
// -------------------------------------------------------
function powerSelected(powerLevel)
{
// Ensure that power can't be changed while wheel is spinning.
if (wheelSpinning == false)
{
// Reset all to grey incase this is not the first time the user has selected the power.
document.getElementById('pw1').className = "";
document.getElementById('pw2').className = "";
document.getElementById('pw3').className = "";
// Now light up all cells below-and-including the one selected by changing the class.
if (powerLevel >= 1)
{
document.getElementById('pw1').className = "pw1";
}
if (powerLevel >= 2)
{
document.getElementById('pw2').className = "pw2";
}
if (powerLevel >= 3)
{
document.getElementById('pw3').className = "pw3";
}
// Set wheelPower var used when spin button is clicked.
wheelPower = powerLevel;
// Light up the spin button by changing it's source image and adding a clickable class to it.
document.getElementById('spin_button').src = "spin_on.png";
document.getElementById('spin_button').className = "clickable";
}
}
// -------------------------------------------------------
// Click handler for spin button.
// -------------------------------------------------------
function startSpin()
{
// Ensure that spinning can't be clicked again while already running.
if (wheelSpinning == false)
{
// Based on the power level selected adjust the number of spins for the wheel, the more times is has
// to rotate with the duration of the animation the quicker the wheel spins.
if (wheelPower == 1)
{
theWheel.animation.spins = 2;
}
else if (wheelPower == 2)
{
theWheel.animation.spins = 5;
}
else if (wheelPower == 3)
{
theWheel.animation.spins = 8;
}
// Disable the spin button so can't click again while wheel is spinning.
document.getElementById('spin_button').src = "spin_off.png";
document.getElementById('spin_button').className = "";
// Begin the spin animation by calling startAnimation on the wheel object.
theWheel.startAnimation();
// Set to true so that power can't be changed and spin button re-enabled during
// the current animation. The user will have to reset before spinning again.
wheelSpinning = true;
}
}
// -------------------------------------------------------
// Function for reset button.
// -------------------------------------------------------
function resetWheel()
{
theWheel.stopAnimation(false); // Stop the animation, false as param so does not call callback function.
theWheel.rotationAngle = 0; // Re-set the wheel angle to 0 degrees.
theWheel.draw(); // Call draw to render changes to the wheel.
document.getElementById('pw1').className = ""; // Remove all colours from the power level indicators.
document.getElementById('pw2').className = "";
document.getElementById('pw3').className = "";
wheelSpinning = false; // Reset to false to power buttons and spin can be clicked again.
}
// -------------------------------------------------------
// Called when the spin animation has finished by the callback feature of the wheel because I specified callback in the parameters.
// note the indicated segment is passed in as a parmeter as 99% of the time you will want to know this to inform the user of their prize.
// -------------------------------------------------------
function alertPrize(indicatedSegment)
{
// Do basic alert of the segment text. You would probably want to do something more interesting with this information.
alert("The wheel stopped on " + indicatedSegment.text);
}
</script>
</body>
</html>