drawSvg.js
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/**
* 画线路svg 图
* type: 0 上行站点 1 下行站点 2 上下行共有 3 不同名合并
*/
var drawSvg = (function(){
var mt = 81//顶部距离
,p = 132//上下行之间的间隔
,x = d3.scale.linear()
,w;
var upStation = function(value){
return value.type != 1 ;
}
var downStation = function(value){
return value.type != 0;
}
var textY = function(d){
}
var upLine = d3.svg.line().x(function(d) {
return d.cx;
}).y(function(){return mt});
var downLine = d3.svg.line().x(function(d) {
return d.cx;
}).y(function(){return mt + p});
var cx = function(d, i){
return x(i);
}
var drawSvgObject = {
init: function(data, container){
w = $('.line_chart:first').width();
var svg = d3.select('#' + container).append('svg')
.attr('width', w).attr('opacity', 0)
,dLen = data.length;
x.range([ 50 , w - 10]).domain([ 0, dLen]);
//上行线条 path
svg.append('path')
.attr('d', function(){
return upLine([{cx: x(0)}, {cx: x(dLen - 1)}]);
})
.attr('class', 'up_path');
//下行线条 path
svg.append('path')
.attr('d', function(){
return downLine([{cx: x(0)}, {cx: x(dLen - 1)}]);
})
.attr('class', 'down_path');
//左弧线 path
svg.append('path')
.attr('d', function(){
var cx = x(0) - 8
,cy = mt + 5
,arc = cx - 18;
return 'M' + cx + ',' + cy + ' C' + arc + ',' + (cy + 5) + ' ' + arc + ',' + (cy + p - 13) + ' ' + cx + ',' + (cy + p - 8);
})
.attr('class', 'up_path arc');
//右弧线 path
svg.append('path')
.attr('d', function(){
var cx = x(dLen - 1) + 8
,cy = mt + 5
,arc = cx + 18;
return 'M' + cx + ',' + cy + ' C' + arc + ',' + (cy + 5) + ' ' + arc + ',' + (cy + p - 13) + ' ' + cx + ',' + (cy + p - 8);
})
.attr('class', 'down_path arc');
var g = svg.append('g').selectAll('g')
.data(data)
.enter()
.append('g').attr('class', 'item');
//上行站点 circle
g.append('circle')
.attr('class', function(d){
if(d.type != 1)
return 'up_station_circle';
})
.attr('cx', cx)
.attr('cy', mt);
//站点名称 text
g.append('text')
.attr('class', function(d, i){
var c = 'station_text';
if(i == 0)
c += ' start';
else if(i == dLen - 1)
c += ' end';
if(d.type == 3)
c += ' up';
return c;
})
.text(function(d){
return d.type==3 ? d.name[0] : d.name;
})
.attr('x', function(d, i){return (d.type==3?(x(i) - 8):x(i))})
.attr('y', mt + 10);
//下行站点
g.select(function(d){return d.type!=0?this:null})
.append('circle')
.attr('class', function(d){
if(d.type != 0)
return 'down_station_circle';
})
.attr('cx', cx)
.attr('cy', mt + p);
//上下行不同名（异站合并）
g.select(function(d){return d.type==3?this:null})
.append('text')
.attr('class', 'station_text down')
.text(function(d){return d.name[1]})
.attr('x', function(d, i){return x(i) + 8;})
.attr('y', mt + 10);
/**
* --------------- 文字居中啊，长度截断啊处理一下 ----------------------
*/
svg.selectAll('text')
.attr('transform', function(d, i){
var len = $(this).text().length;
return 'translate(0,' + (len < 7?(7 - len) * 8:0) + ')';
})
.text(function(){
var t = $(this).text()
len = t.length;
if(len > 7){
$(this).data('fullname', t);
return t.substring(0, 7);
}
return t;
});
$(' .text-load', '#'+container).remove();
svg.transition().duration(500).attr('opacity', 1);
up(svg, data, g);
}
};
//更新
function up(svg, data, g){
/**
* ------------- 抽站 --------------------------------
*/
var ms = w / 37
,dLen = data.length;
if(ms < dLen){
var rs = dLen - ms
,s = parseInt(dLen / 2 - rs)
,e = (rs + s) * 2;
var rsEmes = [];
//中间开始，隔站抽
for(;s < e; s +=2)
rsEmes.push(g[0][s]);
var i = 0;
(function(){
var f = arguments.callee;
if(i >= rsEmes.length){
upPosi(svg)
}
$(rsEmes[i]).fadeOut(30, function(){
$(this).remove();
i ++;
f();
});
})();
}
}
function upPosi(svg){
//重新等比例位置
var gItems = svg.selectAll('g.item')
,dLen = gItems[0].length;
x.domain([ 0, dLen]);
gItems.select(function(d, i){
var ts = $(this).find('text')
,xv = x(i);
if(ts.length == 2){
xv = x(i) - 8;
d3.select(ts[1])
.transition().duration(500)//过渡
.attr('x', x(i) + 8);
}
d3.select(ts[0])
.transition().duration(500)//过渡
.attr('x', xv);
d3.select(this).selectAll('circle')
.transition().duration(500)//过渡
.attr('cx', x(i));
});
//缩线
svg.select('path.up_path')
.transition().delay(500).duration(500)//过渡
.attr('d', function(){
return upLine([{cx: x(0)}, {cx: x(dLen - 1)}]);
});
svg.select('path.down_path')
.transition().delay(500).duration(500)//过渡
.attr('d', function(){
return downLine([{cx: x(0)}, {cx: x(dLen - 1)}]);
});
svg.select('path.down_path.arc')
.transition().delay(500).duration(500)//过渡
.attr('d', function(){
var cx = x(dLen - 1) + 8
,cy = mt + 5
,arc = cx + 18;
return 'M' + cx + ',' + cy + ' C' + arc + ',' + (cy + 5) + ' ' + arc + ',' + (cy + p - 13) + ' ' + cx + ',' + (cy + p - 8);
});
}
return drawSvgObject;
})();