我正在使用d3.js进行可视化。我从this示例开始。 我可以更新液体填充值但我还想更新圆的大小而不使用函数remove（）并重绘所有内容。 有人能给我至少提示我在哪里以及如何开始实现我想要的东西？ 感谢
更新： 我发现我可以使用一个小技巧：viewBox。我可以通过转换缩小viewBox，但我不认为这是一个很好的解决方案。 这是我到目前为止取得的成就：
d3.select("body")
.append("svg")
.attr("id","svg1")
.attr("width",200)
.attr("height",200)
.attr('viewBox', '0 0 200 200');
var config2 = liquidFillGaugeDefaultSettings();
config2.circleThickness = 0.1;
config2.circleFillGap = 0.0;
config2.textVertPosition = 0.5;
config2.waveAnimateTime = 1500;
config2.waveCount = 2;
config2.waveOffset = 0.9;
var gauge2 = loadLiquidFillGauge("svg1", 30, config2, "title");
d3.select("#buttonValue").on("click",function(){
var newValue = Math.floor((Math.random() * 100) + 1);
d3.select("#svg1").transition().duration(1000).attr('viewBox', '-50 -50 500 500');
return gauge2.update(newValue);}
);
d3.select("#buttonSize").on("click",function(){
d3.select("#svg1").selectAll("*").remove();
d3.select("#svg1")
.attr("width",100)
.attr("height",100);
gauge2 = loadLiquidFillGauge("svg1", 30, config2, "title");
});
/*!
* @license Open source under BSD 2-clause (http://choosealicense.com/licenses/bsd-2-clause/)
* Copyright (c) 2015, Curtis Bratton
* All rights reserved.
*
* Liquid Fill Gauge v1.1
*/
function liquidFillGaugeDefaultSettings(){
return {
minValue: 0, // The gauge minimum value.
maxValue: 100, // The gauge maximum value.
circleThickness: 0.05, // The outer circle thickness as a percentage of it's radius.
circleFillGap: 0.05, // The size of the gap between the outer circle and wave circle as a percentage of the outer circles radius.
circleColor: "#178BCA", // The color of the outer circle.
waveHeight: 0.05, // The wave height as a percentage of the radius of the wave circle.
waveCount: 1, // The number of full waves per width of the wave circle.
waveRiseTime: 500, // The amount of time in milliseconds for the wave to rise from 0 to it's final height.
waveAnimateTime: 18000, // The amount of time in milliseconds for a full wave to enter the wave circle.
waveRise: true, // Control if the wave should rise from 0 to it's full height, or start at it's full height.
waveHeightScaling: true, // Controls wave size scaling at low and high fill percentages. When true, wave height reaches it's maximum at 50% fill, and minimum at 0% and 100% fill. This helps to prevent the wave from making the wave circle from appear totally full or empty when near it's minimum or maximum fill.
waveAnimate: true, // Controls if the wave scrolls or is static.
waveColor: "#178BCA", // The color of the fill wave.
waveOffset: 0, // The amount to initially offset the wave. 0 = no offset. 1 = offset of one full wave.
textVertPosition: .5, // The height at which to display the percentage text withing the wave circle. 0 = bottom, 1 = top.
textSize: 1, // The relative height of the text to display in the wave circle. 1 = 50%
valueCountUp: true, // If true, the displayed value counts up from 0 to it's final value upon loading. If false, the final value is displayed.
displayPercent: true, // If true, a % symbol is displayed after the value.
textColor: "#045681", // The color of the value text when the wave does not overlap it.
waveTextColor: "#A4DBf8" // The color of the value text when the wave overlaps it.
};
}
function loadLiquidFillGauge(elementId, value, config, title) {
if(config == null) config = liquidFillGaugeDefaultSettings();
var gauge = d3.select("#" + elementId);
var radius = Math.min(parseInt(gauge.style("width")), parseInt(gauge.style("height")))/2;
var locationX = parseInt(gauge.style("width"))/2 - radius;
var locationY = parseInt(gauge.style("height"))/2 - radius;
var fillPercent = Math.max(config.minValue, Math.min(config.maxValue, value))/config.maxValue;
var waveHeightScale;
if(config.waveHeightScaling){
waveHeightScale = d3.scale.linear()
.range([0,config.waveHeight,0])
.domain([0,50,100]);
} else {
waveHeightScale = d3.scale.linear()
.range([config.waveHeight,config.waveHeight])
.domain([0,100]);
}
var textPixels = (config.textSize*radius/2);
var textFinalValue = parseFloat(value).toFixed(2);
var textStartValue = config.valueCountUp?config.minValue:textFinalValue;
var percentText = config.displayPercent?"%":"";
var circleThickness = config.circleThickness * radius;
var circleFillGap = config.circleFillGap * radius;
var fillCircleMargin = circleThickness + circleFillGap;
var fillCircleRadius = radius - fillCircleMargin;
var waveHeight = fillCircleRadius*waveHeightScale(fillPercent*100);
var waveLength = fillCircleRadius*2/config.waveCount;
var waveClipCount = 1+config.waveCount;
var waveClipWidth = waveLength*waveClipCount;
// Rounding functions so that the correct number of decimal places is always displayed as the value counts up.
var textRounder = function(value){ return Math.round(value); };
if(parseFloat(textFinalValue) != parseFloat(textRounder(textFinalValue))){
textRounder = function(value){ return parseFloat(value).toFixed(1); };
}
if(parseFloat(textFinalValue) != parseFloat(textRounder(textFinalValue))){
textRounder = function(value){ return parseFloat(value).toFixed(2); };
}
// Data for building the clip wave area.
var data = [];
for(var i = 0; i <= 40*waveClipCount; i++){
data.push({x: i/(40*waveClipCount), y: (i/(40))});
}
// Scales for drawing the outer circle.
var gaugeCircleX = d3.scale.linear().range([0,2*Math.PI]).domain([0,1]);
var gaugeCircleY = d3.scale.linear().range([0,radius]).domain([0,radius]);
// Scales for controlling the size of the clipping path.
var waveScaleX = d3.scale.linear().range([0,waveClipWidth]).domain([0,1]);
var waveScaleY = d3.scale.linear().range([0,waveHeight]).domain([0,1]);
// Scales for controlling the position of the clipping path.
var waveRiseScale = d3.scale.linear()
// The clipping area size is the height of the fill circle + the wave height, so we position the clip wave
// such that the it will overlap the fill circle at all when at 0%, and will totally cover the fill
// circle at 100%.
.range([(fillCircleMargin+fillCircleRadius*2+waveHeight),(fillCircleMargin-waveHeight)])
.domain([0,1]);
var waveAnimateScale = d3.scale.linear()
.range([0, waveClipWidth-fillCircleRadius*2]) // Push the clip area one full wave then snap back.
.domain([0,1]);
// Scale for controlling the position of the text within the gauge.
var textRiseScaleY = d3.scale.linear()
.range([fillCircleMargin+fillCircleRadius*2,(fillCircleMargin+textPixels*0.7)])
.domain([0,1]);
// Center the gauge within the parent SVG.
var gaugeGroup = gauge.append("g")
.attr('transform','translate('+locationX+','+locationY+')');
// Draw the outer circle.
var gaugeCircleArc = d3.svg.arc()
.startAngle(gaugeCircleX(0))
.endAngle(gaugeCircleX(1))
.outerRadius(gaugeCircleY(radius))
.innerRadius(gaugeCircleY(radius-circleThickness));
gaugeGroup.append("path")
.attr("id","path")
.attr("d", gaugeCircleArc)
.style("fill", config.circleColor)
.attr('transform','translate('+radius+','+radius+')');
// Text where the wave does not overlap.
var text1 = gaugeGroup.append("text")
.text(textRounder(textStartValue) + percentText)
.attr("class", "liquidFillGaugeText")
.attr("text-anchor", "middle")
.attr("font-size", textPixels + "px")
.style("fill", config.textColor)
.attr('transform','translate('+radius+','+textRiseScaleY(config.textVertPosition)+')');
var div = d3.select("body").append("div")
.attr("class", "tooltip")
.style("opacity", 0);
// d3.selectAll("#svg1").on("mouseover",function() {
// div.transition()
// .duration(200)
// .style("opacity", .9)
// .attr("text-anchor", "middle")
// .text("click to expand")
// .attr('transform','translate('+radius+','+textRiseScaleY(config.textVertPosition)+')');
// setTimeout(function(){
// $('div.tooltip').remove();
// },3000);
// });
// The clipping wave area.
var clipArea = d3.svg.area()
.x(function(d) { return waveScaleX(d.x); } )
.y0(function(d) { return waveScaleY(Math.sin(Math.PI*2*0.9*-1 + Math.PI*2*(1-config.waveCount) + d.y*2*Math.PI));} )
.y1(function(d) { return (fillCircleRadius*2 + waveHeight); } );
var waveGroup = gaugeGroup.append("defs")
.append("clipPath")
.attr("id", "clipWave" + elementId);
var wave = waveGroup.append("path")
.datum(data)
.attr("d", clipArea)
.attr("T", 0);
// The inner circle with the clipping wave attached.
var fillCircleGroup = gaugeGroup.append("g")
.attr("clip-path", "url(#clipWave" + elementId + ")");
fillCircleGroup.append("circle")
.attr("cx", radius)
.attr("cy", radius)
.attr("r", fillCircleRadius)
.style("fill", config.waveColor);
// Text where the wave does overlap.
var text2 = fillCircleGroup.append("text")
.text(textRounder(textStartValue) + percentText)
.attr("class", "liquidFillGaugeText")
.attr("text-anchor", "middle")
.attr("font-size", textPixels + "px")
.style("fill", config.waveTextColor)
.attr('transform','translate('+radius+','+textRiseScaleY(config.textVertPosition)+')');
var textTitle = fillCircleGroup.append("text")
.text(title)
.attr("class", "liquidFillGaugeText")
.attr("text-anchor", "middle")
.attr("font-size", (textPixels/3) + "px")
.style("fill", config.waveTextColor)
.attr('transform','translate('+radius+','+textRiseScaleY(0.2)+')');
// Make the value count up.
if(config.valueCountUp){
var textTween = function(){
var i = d3.interpolate(this.textContent, textFinalValue);
return function(t) { this.textContent = textRounder(i(t)) + percentText; }
};
text1.transition()
.duration(config.waveRiseTime)
.tween("text", textTween);
text2.transition()
.duration(config.waveRiseTime)
.tween("text", textTween);
}
// Make the wave rise. wave and waveGroup are separate so that horizontal and vertical movement can be controlled independently.
var waveGroupXPosition = fillCircleMargin+fillCircleRadius*2-waveClipWidth;
if(config.waveRise){
waveGroup.attr('transform','translate('+waveGroupXPosition+','+waveRiseScale(0)+')')
.transition()
.duration(config.waveRiseTime)
.attr('transform','translate('+waveGroupXPosition+','+waveRiseScale(fillPercent)+')')
.each("start", function(){ wave.attr('transform','translate(1,0)'); }); // This transform is necessary to get the clip wave positioned correctly when waveRise=true and waveAnimate=false. The wave will not position correctly without this, but it's not clear why this is actually necessary.
} else {
waveGroup.attr('transform','translate('+waveGroupXPosition+','+waveRiseScale(fillPercent)+')');
}
if(config.waveAnimate) animateWave();
function animateWave() {
wave.attr('transform','translate('+waveAnimateScale(wave.attr('T'))+',0)');
wave.transition()
.duration(config.waveAnimateTime * (1-wave.attr('T')))
.ease('linear')
.attr('transform','translate('+waveAnimateScale(1)+',0)')
.attr('T', 1)
.each('end', function(){
wave.attr('T', 0);
animateWave(config.waveAnimateTime);
});
}
function GaugeUpdater(){
this.update = function(value){
var newFinalValue = parseFloat(value).toFixed(2);
var textRounderUpdater = function(value){ return Math.round(value); };
if(parseFloat(newFinalValue) != parseFloat(textRounderUpdater(newFinalValue))){
textRounderUpdater = function(value){ return parseFloat(value).toFixed(1); };
}
if(parseFloat(newFinalValue) != parseFloat(textRounderUpdater(newFinalValue))){
textRounderUpdater = function(value){ return parseFloat(value).toFixed(2); };
}
var textTween = function(){
var i = d3.interpolate(this.textContent, parseFloat(value).toFixed(2));
return function(t) { this.textContent = textRounderUpdater(i(t)) + percentText; }
};
text1.transition()
.duration(config.waveRiseTime)
.tween("text", textTween);
text2.transition()
.duration(config.waveRiseTime)
.tween("text", textTween);
var fillPercent = Math.max(config.minValue, Math.min(config.maxValue, value))/config.maxValue;
var waveHeight = fillCircleRadius*waveHeightScale(fillPercent*100);
var waveRiseScale = d3.scale.linear()
// The clipping area size is the height of the fill circle + the wave height, so we position the clip wave
// such that the it will overlap the fill circle at all when at 0%, and will totally cover the fill
// circle at 100%.
.range([(fillCircleMargin+fillCircleRadius*2+waveHeight),(fillCircleMargin-waveHeight)])
.domain([0,1]);
var newHeight = waveRiseScale(fillPercent);
var waveScaleX = d3.scale.linear().range([0,waveClipWidth]).domain([0,1]);
var waveScaleY = d3.scale.linear().range([0,waveHeight]).domain([0,1]);
var newClipArea;
if(config.waveHeightScaling){
newClipArea = d3.svg.area()
.x(function(d) { return waveScaleX(d.x); } )
.y0(function(d) { return waveScaleY(Math.sin(Math.PI*2*0.9*-1 + Math.PI*2*(1-config.waveCount) + d.y*2*Math.PI));} )
.y1(function(d) { return (fillCircleRadius*2 + waveHeight); } );
} else {
newClipArea = clipArea;
}
var newWavePosition = config.waveAnimate?waveAnimateScale(1):0;
wave.transition()
.duration(0)
.transition()
.duration(config.waveAnimate?(config.waveAnimateTime * (1-wave.attr('T'))):(config.waveRiseTime))
.ease('linear')
.attr('d', newClipArea)
.attr('transform','translate('+newWavePosition+',0)')
.attr('T','1')
.each("end", function(){
if(config.waveAnimate){
wave.attr('transform','translate('+waveAnimateScale(0)+',0)');
animateWave(config.waveAnimateTime);
}
});
waveGroup.transition()
.duration(config.waveRiseTime)
.attr('transform','translate('+waveGroupXPosition+','+newHeight+')')
}
}
return new GaugeUpdater();
}<script src="https://gist.githubusercontent.com/brattonc/5e5ce9beee483220e2f6/raw/4c2e1e4b0ed515d9d9de26d0996519fc16c2ae43/liquidFillGauge.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.0.0/d3.min.js"></script>
<div>
<button type="button" id="buttonValue">Randomize Value</button>
<button type="button" id="buttonSize">Resize</button>
</div>