End*_*ndi 7 svg gradient google-visualization
我正在尝试通过向为列绘制的SVG rects添加渐变来向Google ColumnChart添加一些pizazz.下面的代码将增加梯度,以iframe的SVG> DEFS和所有我关心的浏览器在这一刻(更高版本的Firefox,IE和Chrome浏览器)正确地更换rects的填充属性.
我的问题是,无论何时我将鼠标悬停在上面或选择一个条形图(或图例),颜色都会重置为原始颜色.我是一个SVG菜鸟,我无法弄清楚重置颜色的方式,位置或内容.
所以我的问题是有没有人知道如何(使用javascript/jquery)停止,覆盖或某种方式操纵重置颜色的代码？如果可能的话,我宁愿保持"互动"部分的完整性(工具提示等).
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Visualization API Sample</title>
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load('visualization', '1', {packages: ['corechart']});
google.load("jquery", "1.7.1");
</script>
<script type="text/javascript">
function drawVisualization() {
// Create and populate the data table.
var data = new google.visualization.DataTable();
var rowData = [['Year', 'North', 'West', 'South'],
['2010', 197, 333, 298 ],
['2011', 167, 261, 381 ]];
var data = google.visualization.arrayToDataTable(rowData);
visualization = new google.visualization.ColumnChart(document.getElementById('visualization'));
google.visualization.events.addListener(visualization, 'ready', function(){
var svgns = "http://www.w3.org/2000/svg";
var gradients = [["red","#C0504D","#E6B8B7"],
["green","#9BBB59","#D8E4BC"],
["blue","#4F81BD","DCE6F1"]];
var svg_defs = $("#visualization iframe").contents().find('defs');
// add gradients to svg defs
for(var i = 0; i < gradients.length; i++){
var grad = $(document.createElementNS(svgns, "linearGradient")).
attr({id:gradients[i][0],x1:"0%",x2:"0%",y1:"0%",y2:"100%"});
var stopTop = $(document.createElementNS(svgns, "stop")).
attr({offset:"0%","stop-color":gradients[i][1]});
var stopBottom = $(document.createElementNS(svgns, "stop")).
attr({offset:"100%","stop-color":gradients[i][2]});
$(grad).append(stopTop).append(stopBottom);
svg_defs.append(grad);
}
// #3366cc, #dc3912, #ff9900 - replace default colors with gradients
$("#visualization iframe").contents().find('rect[fill="#3366cc"]').attr({'fill':'url(#blue)','stroke-width':0.4,'stroke':'#000000'});
$("#visualization iframe").contents().find('rect[fill="#dc3912"]').attr({'fill':'url(#blue)','stroke-width':0.4,'stroke':'#000000'});
$("#visualization iframe").contents().find('rect[fill="#ff9900"]').attr({'fill':'url(#blue)','stroke-width':0.4,'stroke':'#000000'});
});
// Create and draw the visualization.
visualization.draw(data,{width:600, height:400});
}
google.setOnLoadCallback(drawVisualization);
</script>
</head>
<body style="font-family: Arial;border: 0 none;">
<div id="visualization" style="width: 600px; height: 400px;"></div>
</body>
</html>
UPDATE
因此,同时期待通过DOM,看看我能找到这些地方的颜色代码可以被存储(也有由发现使用它们的功能),我发现这些(其时集将做我想做的):
//fill
visualization.qa.l.e[0].Hm.O = "url(#blue)";
visualization.qa.l.e[1].Hm.O = "url(#red)";
visualization.qa.l.e[2].Hm.O = "url(#green)";
// stroke
visualization.qa.l.e[0].Hm.Jb = "#000000";
visualization.qa.l.e[1].Hm.Jb = "#000000";
visualization.qa.l.e[2].Hm.Jb = "#000000";
// fill-opacity
//visualization.qa.l.e[0].Hm.$b = 0.5;
//visualization.qa.l.e[1].Hm.$b = 0.5;
//visualization.qa.l.e[2].Hm.$b = 0.5;
// stroke-width
visualization.qa.l.e[0].Hm.H = 0.4;
visualization.qa.l.e[1].Hm.H = 0.4;
visualization.qa.l.e[2].Hm.H = 0.4;
// stroke-opacity
//visualization.qa.l.e[0].Hm.nc = 0.5;
//visualization.qa.l.e[1].Hm.nc = 0.5;
//visualization.qa.l.e[2].Hm.nc = 0.5;
但这仅仅是一个临时的解决方案,因为我敢肯定,下一次谷歌更新了可视化代码,这些变量名称将发生变化(我不认为有人选择这些目的和使用可能会选择不同的变量名的压缩/混淆下一次 - 但后来谁知道 - 也许它不会).
因此,如果有人知道一种不依赖于手动查找和设置变量名称的更永久的方式,我会喜欢它.否则,这可能是我现在最好的选择.
UPDATE2(2012年3月1日)
一个很好的例子.变量现在被移动:
//fill
visualization.da.C.d[0].en.S = "url(#blue)";
您可以使用 aMutationObserver来了解 svg 何时发生更改
将代码从'ready'事件侦听器移动到observer
覆盖重置颜色的代码
如下面的片段所示...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Visualization API Sample</title>
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load('visualization', '1', {packages: ['corechart']});
google.load("jquery", "1.7.1");
</script>
<script type="text/javascript">
function drawVisualization() {
// Create and populate the data table.
var data = new google.visualization.DataTable();
var rowData = [['Year', 'North', 'West', 'South'],
['2010', 197, 333, 298 ],
['2011', 167, 261, 381 ]];
var data = google.visualization.arrayToDataTable(rowData);
var chartDiv = document.getElementById('visualization');
visualization = new google.visualization.ColumnChart();
// observe changes to the chart container
var observer = new MutationObserver(function () {
var svgns = "http://www.w3.org/2000/svg";
var gradients = [["red","#C0504D","#E6B8B7"],
["green","#9BBB59","#D8E4BC"],
["blue","#4F81BD","DCE6F1"]];
var svg_defs = $("#visualization iframe").contents().find('defs');
// add gradients to svg defs
for(var i = 0; i < gradients.length; i++){
var grad = $(document.createElementNS(svgns, "linearGradient")).
attr({id:gradients[i][0],x1:"0%",x2:"0%",y1:"0%",y2:"100%"});
var stopTop = $(document.createElementNS(svgns, "stop")).
attr({offset:"0%","stop-color":gradients[i][1]});
var stopBottom = $(document.createElementNS(svgns, "stop")).
attr({offset:"100%","stop-color":gradients[i][2]});
$(grad).append(stopTop).append(stopBottom);
svg_defs.append(grad);
}
// #3366cc, #dc3912, #ff9900 - replace default colors with gradients
$("#visualization iframe").contents().find('rect[fill="#3366cc"]').attr({'fill':'url(#blue)','stroke-width':0.4,'stroke':'#000000'});
$("#visualization iframe").contents().find('rect[fill="#dc3912"]').attr({'fill':'url(#blue)','stroke-width':0.4,'stroke':'#000000'});
$("#visualization iframe").contents().find('rect[fill="#ff9900"]').attr({'fill':'url(#blue)','stroke-width':0.4,'stroke':'#000000'});
});
observer.observe(chartDiv, {
childList: true,
subtree: true
});
// Create and draw the visualization.
visualization.draw(data,{width:600, height:400});
}
google.setOnLoadCallback(drawVisualization);
</script>
</head>
<body style="font-family: Arial;border: 0 none;">
<div id="visualization" style="width: 600px; height: 400px;"></div>
</body>
</html>