在图像上创建网格叠加 [英] Creating a grid overlay over image
问题描述
我制作了一个脚本(使用mootools库)，该脚本应该用表格网格覆盖图像，并且在每个网格单元格的背景颜色上单击/拖动时，该单元格将突出显示.
I made a script (using mootools library) that is supposed to overlay an image with a table grid and when each grid cell is clicked/dragged over its background color changes 'highlighting' the cell.
当前代码创建一个表格并将其放置在元素上(在这种情况下为el，在此情况下为图片).之所以使用表格，是因为我稍后打算添加矩形选择工具，这似乎是最简单的方法.
Current code creates a table and positions it over the element (el, image in this case). Table was used since I am planning to add rectangle select tool later on, and it seemed easiest way to do it.
<html>
<head>
<title></title>
<script type="text/javascript" src="mootools.js"></script>
<script type="text/javascript">
var SetGrid = function(el, sz, nr, nc){
//get number of rows/columns according to the 'grid' size
numcols = el.getSize().x/sz;
numrows = el.getSize().y/sz;
//create table element for injecting cols/rows
var gridTable = new Element('table', {
'id' : 'gridTable',
'styles' : {
'width' : el.getSize().x,
'height' : el.getSize().y,
'top' : el.getCoordinates().top,
'left' : el.getCoordinates().left
}
});
//inject rows/cols into gridTable
for (row = 1; row<=numrows; row++){
thisRow = new Element('tr', {
'id' : row,
'class' : 'gridRow'
});
for(col = 1; col<=numcols; col++){
thisCol = new Element('td', {
'id' : col,
'class' : 'gridCol0'
});
//each cell gets down/up over event... down starts dragging|up stops|over draws area if down was fired
thisCol.addEvents({
'mousedown' : function(){
dragFlag = true;
startRow = this.getParent().get('id');
startCol = this.get('id');
},
'mouseup' : function(){
dragFlag = false;
},
'mouseover' : function(){
if (dragFlag==true){
this.set('class', 'gridCol'+$$('#lvlSelect .on').get('value'));
}
},
'click' : function(){
//this.set('class', 'gridCol'+$$('#lvlSelect .on').get('id').substr(3, 1) );
str = $$('#lvlSelect .on').get('id');
alert(str.substr(2, 3));
}
});
thisCol.inject(thisRow, 'bottom');
};
thisRow.inject(gridTable, 'bottom');
};
gridTable.inject(el.getParent());
}
//sens level selector func
var SetSensitivitySelector = function(el, sz, nr, nc){
$$('#lvlSelect ul li').each(function(el){
el.addEvents({
'click' : function(){
$$('#lvlSelect ul li').set('class', '');
this.set('class', 'on');
},
'mouseover' : function(){
el.setStyle('cursor','pointer');
},
'mouseout' : function(){
el.setStyle('cursor','');
}
});
});
}
//execute
window.addEvent('load', function(){
SetGrid($('imagetomap'), 32);
SetSensitivitySelector();
});
</script>
<style>
#imagetomapdiv { float:left; display: block; }
#gridTable { border:1px solid red; border-collapse:collapse; position:absolute; z-index:5; }
#gridTable td { opacity:0.2; filter:alpha(opacity=20); }
#gridTable .gridCol0 { border:1px solid gray; background-color: none; }
#gridTable .gridCol1 { border:1px solid gray; background-color: green; }
#gridTable .gridCol2 { border:1px solid gray; background-color: blue; }
#gridTable .gridCol3 { border:1px solid gray; background-color: yellow; }
#gridTable .gridCol4 { border:1px solid gray; background-color: orange; }
#gridTable .gridCol5 { border:1px solid gray; background-color: red; }
#lvlSelect ul {float: left; display:block; position:relative; margin-left: 20px; padding: 10px; }
#lvlSelect ul li { width:40px; text-align:center; display:block; border:1px solid black; position:relative; padding: 10px; list-style:none; opacity:0.2; filter:alpha(opacity=20); }
#lvlSelect ul li.on { opacity:1; filter:alpha(opacity=100); }
#lvlSelect ul #li0 { background-color: none; }
#lvlSelect ul #li1 { background-color: green; }
#lvlSelect ul #li2 { background-color: blue; }
#lvlSelect ul #li3 { background-color: yellow; }
#lvlSelect ul #li4 { background-color: orange; }
#lvlSelect ul #li5 { background-color: red; }
</style>
</head>
<body>
<div id="imagetomapdiv">
<img id="imagetomap" src="1.png">
</div>
<div id="lvlSelect">
<ul>
<li value="0" id="li0">0</li>
<li value="1" id="li1">1</li>
<li value="2" id="li2">2</li>
<li value="3" id="li3">3</li>
<li value="4" id="li4">4</li>
<li value="5" id="li5" class="on">5</li>
</ul>
</div>
</body>
</html>
有两个问题:虽然它在FF中可以正常工作，但是如果刷新页面，IE和Chrome不会创建该表.如果返回目录根目录并单击文件链接，则显示网格表，如果您单击刷新"按钮，则脚本会运行，但不会注入表.
There are two problems: while it works just fine in FF, IE and Chrome do not create the table if the page is refreshed. If you go back to directory root and click on the link to the file the grid table is displayed, if you hit 'refresh' button -- the script runs but the table is not injected.
第二，尽管表HTML注入了IE，但它不显示它.我尝试添加nbsp，以确保其不会被忽略-无济于事.
Secondly, although the table HTML is injected in IE, it does not display it. I tried adding nbsp's to make sure its not ignored -- to no avail.
任何对改进代码或解决问题的建议都表示赞赏.
Any suggestions on improving code or help with the issues is appreciated.
谢谢！
推荐答案
尝试在IE顶部添加docType dec:
Try adding a docType dec at the top of the page IE:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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