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我正在尝试从源 http://dougtesting.net/home 获取 winwheel ，我设置了所有内容并在 chrome 和 IE 9+ 上正常工作，但我需要让它在 IE 8 上工作。经过一番调查，我发现需要插入 excanvas.js 才能让 Canvas 在 IE 8 上工作，但它并没有解决我的问题仍然是 IE 8 显示错误“当前浏览器不支持 Canvas ”。
我的 HTML 代码:
<html>
<head>
<title>Wheel</title>
<link rel="stylesheet" href="main.css" type="text/css" />
<script type="text/javascript" src="excanvas.js"></script>
<script type="text/javascript" src="Winwheel.js"></script>
<script src="TweenMax.min.js"></script>
</head>
<body>
<div align="center">
<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();" />
</div>
</td>
<td width="421" height="564" class="the_wheel" align="center" valign="center">
<canvas id="canvas" width="420" height="420">
<p style="{color: white}" align="center">Sorry, your browser doesn't support canvas. Please try another.</p>
</canvas>
</td>
</tr>
</table>
<script>
// Create new wheel object specifying the parameters at creation time.
var theWheel = new Winwheel({
'numSegments' : 20, // Specify number of segments.
'outerRadius' : 160, // Set outer radius so wheel fits inside the background.
'drawText' : false, // Code drawn text can be used with segment images.
'textFontSize' : 16,
'textOrientation' : 'curved',
'textAlignment' : 'inner',
'textMargin' : '90',
'textFontFamily' : 'monospace',
'textStrokeStyle' : 'black',
'textLineWidth' : 3,
'textFillStyle' : 'white',
'drawMode' : 'segmentImage', // Must be segmentImage to draw wheel using one image per segemnt.
'segments' : // Define segments including image and text.
[
{'image' : '1.png', 'text' : '379013000'},
{'image' : '2.png', 'text' : '379067000'},
{'image' : '3.png', 'text' : '379021000'},
{'image' : '4.png', 'text' : 'LOST'},
{'image' : '5.png', 'text' : '800041000'},
{'image' : '6.png', 'text' : '389081000'},
{'image' : '7.png', 'text' : '508056000'},
{'image' : '8.png', 'text' : 'EARN'},
{'image' : '9.png', 'text' : '389020000'},
{'image' : '10.png', 'text' : 'TURN'},
{'image' : '11.png', 'text' : '800042000'},
{'image' : '12.png', 'text' : '389020000'},
{'image' : '13.png', 'text' : '379068000'},
{'image' : '14.png', 'text' : 'EARN'},
{'image' : '15.png', 'text' : 'LOST'},
{'image' : '16.png', 'text' : '389081000'},
{'image' : '17.png', 'text' : '370180000'},
{'image' : '18.png', 'text' : '700002000'},
{'image' : '19.png', 'text' : '379067000'},
{'image' : '20.png', 'text' : '800044000'},
],
'animation' : // Specify the animation to use.
{
'type' : 'spinToStop',
'duration' : 5, // Duration in seconds.
'spins' : 8, // Number of complete spins.
'callbackFinished' : 'alertPrize()'
}
});
// 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 = 3;
}
else if (wheelPower == 2)
{
theWheel.animation.spins = 8;
}
else if (wheelPower == 3)
{
theWheel.animation.spins = 15;
}
// 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.
// -------------------------------------------------------
function alertPrize()
{
// Get the segment indicated by the pointer on the wheel background which is at 0 degrees.
var winningSegment = theWheel.getIndicatedSegment();
// Do basic alert of the segment text. You would probably want to do something more interesting with this information.
switch(winningSegment.text)
{
case "LOST": // lost 1k np
break;
case "EARN": // earn 1k np
break;
case "TURN": // do nothing
break;
default: // give item
}
}
</script>
</body>
</html>
错误显示:
http://screencast.com/t/23WeMNBXOH8N
在我看来，wheelwin 没有读取新 Canvas 。我该如何修复它？
提前致谢
最佳答案
我通过插入修复了它
<!--[if lte IE 8]><script type="text/javascript" src="themes/default/js/excanvas.js"></script><![endif]-->
完成后， Canvas 在 Internet Explorer 8 中正常工作。
下载链接:
https://github.com/arv/ExplorerCanvas/blob/master/excanvas.js
完整代码示例:
<!DOCTYPE html>
<html>
<head>
<title>Wheel</title>
<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
<link rel="stylesheet" href="themes/default/wheel.css" type="text/css" />
<!--[if lte IE 8]><script type="text/javascript" src="themes/default/js/excanvas.js"></script><![endif]-->
<script type="text/javascript" src="themes/default/js/Winwheel.js"></script>
<script src="themes/default/js/TweenMax.min.js"></script>
</head>
<body onload="initWinwheel();" oncontextmenu="return false" onselectstart="return false" ondragstart="return false" scroll="no">
<div align="center">
<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="themes/default/images/wheel/spin_off.png" alt="Spin" onClick="startSpin();" />
</div>
</td>
<td width="421" height="564" class="the_wheel" align="center" valign="center">
<canvas id="canvas" width="420" height="420">
<p style="{color: white}" align="center">Sorry, your browser doesn't support canvas. Please try another.</p>
</canvas>
</td>
</tr>
</table>
<script>
var theWheel;
function initWinwheel() {
// Create new wheel object specifying the parameters at creation time.
theWheel = new Winwheel({
'numSegments' : 20, // Specify number of segments.
'outerRadius' : 160, // Set outer radius so wheel fits inside the background.
'drawText' : false, // Code drawn text can be used with segment images.
'textFontSize' : 16,
'textOrientation' : 'curved',
'textAlignment' : 'inner',
'textMargin' : '90',
'textFontFamily' : 'monospace',
'textStrokeStyle' : 'black',
'textLineWidth' : 3,
'textFillStyle' : 'white',
'drawMode' : 'segmentImage', // Must be segmentImage to draw wheel using one image per segemnt.
'segments' : // Define segments including image and text.
[
{'image' : 'themes/default/images/wheel/1.png', 'text' : '379013000'},
{'image' : 'themes/default/images/wheel/2.png', 'text' : '379067000'},
{'image' : 'themes/default/images/wheel/3.png', 'text' : '379021000'},
{'image' : 'themes/default/images/wheel/4.png', 'text' : 'LOST'},
{'image' : 'themes/default/images/wheel/5.png', 'text' : '800041000'},
{'image' : 'themes/default/images/wheel/6.png', 'text' : '389081000'},
{'image' : 'themes/default/images/wheel/7.png', 'text' : '508056000'},
{'image' : 'themes/default/images/wheel/8.png', 'text' : 'EARN'},
{'image' : 'themes/default/images/wheel/9.png', 'text' : '389020000'},
{'image' : 'themes/default/images/wheel/10.png', 'text' : 'TURN'},
{'image' : 'themes/default/images/wheel/11.png', 'text' : '800042000'},
{'image' : 'themes/default/images/wheel/12.png', 'text' : '389020000'},
{'image' : 'themes/default/images/wheel/13.png', 'text' : '379068000'},
{'image' : 'themes/default/images/wheel/14.png', 'text' : 'EARN'},
{'image' : 'themes/default/images/wheel/15.png', 'text' : 'LOST'},
{'image' : 'themes/default/images/wheel/16.png', 'text' : '389081000'},
{'image' : 'themes/default/images/wheel/17.png', 'text' : '370180000'},
{'image' : 'themes/default/images/wheel/18.png', 'text' : '700002000'},
{'image' : 'themes/default/images/wheel/19.png', 'text' : '379067000'},
{'image' : 'themes/default/images/wheel/20.png', 'text' : '800044000'},
],
'animation' : // Specify the animation to use.
{
'type' : 'spinToStop',
'duration' : 5, // Duration in seconds.
'spins' : 5, // Number of complete spins.
'callbackFinished' : 'alertPrize()'
}
});
}
// 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 = "themes/default/images/wheel/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 = 3;
}
else if (wheelPower == 2)
{
theWheel.animation.spins = 8;
}
else if (wheelPower == 3)
{
theWheel.animation.spins = 15;
}
// Disable the spin button so can't click again while wheel is spinning.
document.getElementById('spin_button').src = "themes/default/images/wheel/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;
//sendCmd2("EMPTY","-1", readCookie("CHAR"));
}
}
// -------------------------------------------------------
// 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.
// -------------------------------------------------------
function alertPrize()
{
// Get the segment indicated by the pointer on the wheel background which is at 0 degrees.
var winningSegment = theWheel.getIndicatedSegment();
if(winningSegment.text == "")
return;
// Do basic alert of the segment text. You would probably want to do something more interesting with this information.
switch(winningSegment.text)
{
case "LOST": // lost 1k np
sendCmd("+np_give","-1000", readCookie("CHAR"));
break;
case "EARN": // earn 1k np
sendCmd("+np_give","1000", readCookie("CHAR"));
break;
case "TURN": // do nothing
sendCmd("EMPTY","0", readCookie("CHAR"));
break;
default: // give item
sendCmd("+give_item",winningSegment.text, readCookie("CHAR"));
}
winningSegment.text = "";
}
function sendCmd(command, giveitem,character)
{
$.ajax({ url: 'https://titan.maxko.org/?page=async',
data: {cmd: command, item: giveitem, chars: character},
type: 'post',
success: function(output) {
//alert(output);
}
});
}
// Cookies
function createCookie(name, value, days) {
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
var expires = "; expires=" + date.toGMTString();
}
else var expires = "";
document.cookie = name + "=" + value + expires + "; path=/";
}
function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') c = c.substring(1, c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
}
return null;
}
function eraseCookie(name) {
createCookie(name, "", -1);
}
</script>
</body>
</html>
关于javascript - Winwheel IE 8 Canvas ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40518654/
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4
0
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