我正在构建http://jsfiddle.net/zm5p9LLe/中提到的d3js液体填充可视化。该示例显示了一个液体填充量规。我正在循环并创建多个仪表。但是，动画仅适用于循环的最后一次迭代。这是由于转换的公共div ID吗？我们是否有任何替代方案可以在所有仪表中制作动画？
HTML
<svg id="fillgauge1" width="97%" height="250"></svg>
CSS
.liquidFillGaugeText {
font-family: Helvetica;
font-weight: bold;
}
JAVASCRIPT
loadLiquidFillGauge("fillgauge1", 45.34);
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: 3, // The number of full waves per width of the wave circle.
waveRiseTime: 1000, // The amount of time in milliseconds for the wave to rise from 0 to it's final height.
waveAnimateTime: 1000, // 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: 0.25, // The amount to initially offset the wave. 0 = no offset. 1 = offset of one full wave.
textVertPosition: .8, // The height at which to display the percentage text withing the wave circle. 0 = bottom, 1 = top.
textSize: 0.6, // 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) {
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 won't 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("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) + ')');
// 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 * config.waveOffset * -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);
// 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) + ')');
// 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.transition()
.duration(config.waveAnimateTime)
.ease("linear")
.attr('transform', 'translate(' + waveAnimateScale(1) + ',0)')
.each("end", function () {
wave.attr('transform', 'translate(' + waveAnimateScale(0) + ',0)');
animateWave(config.waveAnimateTime);
});
}
}