我正在尝试使用chart.js v2创建一个水平条形图.在将网络服役大约两个小时后,我没有结果.有没有办法从左到右画这样的图表？
解决方法
这是Chart.js 2.1的一部分吧！图表类型为horizontalBar(小写h).
var config = { type: 'horizontalBar',data: { ...
小提琴 – http://jsfiddle.net/gpxjohup/
原始答案
预习
脚本
大多数代码都是Chart.js库中bar的代码副本,其中x / y和宽度/高度交换.感谢@ZachPanzarino为轴标签提供帮助！
Chart.defaults.HorizontalBar = {
hover: {
mode: "single"
},scales: {
yAxes: [{
position: 'left',type: "category",categoryPercentage: 0.8,barPercentage: 1,gridLines: { offsetGridLines: true }
}],xAxes: [{
ticks: {
beginAtZero: true
},position: 'bottom',type: "linear",}],},};
Chart.controllers.HorizontalBar = Chart.controllers.bar.extend({
updateElement: function updateElement(rectangle,index,reset,numBars) {
var xScale = this.getScaleForId(this.getDataset().xAxisID);
var yScale = this.getScaleForId(this.getDataset().yAxisID);
var xScalePoint;
if (xScale.min < 0 && xScale.max < 0) {
xScalePoint = xScale.getPixelForValue(xScale.max);
} else if (xScale.min > 0 && xScale.max > 0) {
xScalePoint = xScale.getPixelForValue(xScale.min);
} else {
xScalePoint = xScale.getPixelForValue(0);
}
Chart.helpers.extend(rectangle,{
_chart: this.chart.chart,_xScale: xScale,_yScale: yScale,_datasetIndex: this.index,_index: index,_model: {
x: reset ? xScalePoint : this.calculateBarX(index,this.index),y: this.calculateBarY(index,label: this.chart.data.labels[index],datasetLabel: this.getDataset().label,base: this.calculateBarBase(this.index,index),height: this.calculateBarHeight(numBars),backgroundColor: rectangle.custom && rectangle.custom.backgroundColor ? rectangle.custom.backgroundColor : Chart.helpers.getValueAtIndexOrDefault(this.getDataset().backgroundColor,this.chart.options.elements.rectangle.backgroundColor),borderColor: rectangle.custom && rectangle.custom.borderColor ? rectangle.custom.borderColor : Chart.helpers.getValueAtIndexOrDefault(this.getDataset().borderColor,this.chart.options.elements.rectangle.borderColor),borderWidth: rectangle.custom && rectangle.custom.borderWidth ? rectangle.custom.borderWidth : Chart.helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth,this.chart.options.elements.rectangle.borderWidth),// override the draw and inRange functions because the one in the library needs width (we only have height)
draw: function() {
var ctx = this._chart.ctx;
ctx.fillStyle = this._view.backgroundColor;
ctx.fillRect(this._view.base,this._view.y - this._view.height / 2,this._view.x - this._view.base,this._view.height);
ctx.strokeStyle = this._view.borderColor;
ctx.strokeWidth = this._view.borderWidth;
ctx.strokeRect(this._view.base,this._view.height);
},inRange: function (mouseX,mouseY) {
var vm = this._view;
var inRange = false;
if (vm) {
if (vm.x < vm.base) {
inRange = (mouseY >= vm.y - vm.height / 2 && mouseY <= vm.y + vm.height / 2) && (mouseX >= vm.x && mouseX <= vm.base);
} else {
inRange = (mouseY >= vm.y - vm.height / 2 && mouseY <= vm.y + vm.height / 2) && (mouseX >= vm.base && mouseX <= vm.x);
}
}
return inRange;
}
});
rectangle.pivot();
// the animation progresses _view values from their current value to the _model value
rectangle._view.x = rectangle._model.base;
},calculateBarBase: function (datasetIndex,index) {
var xScale = this.getScaleForId(this.getDataset().xAxisID);
var yScale = this.getScaleForId(this.getDataset().yAxisID);
var base = 0;
if (xScale.options.stacked) {
var value = this.chart.data.datasets[datasetIndex].data[index];
if (value < 0) {
for (var i = 0; i < datasetIndex; i++) {
var negDS = this.chart.data.datasets[i];
if (Chart.helpers.isDatasetVisible(negDS) && negDS.xAxisID === xScale.id) {
base += negDS.data[index] < 0 ? negDS.data[index] : 0;
}
}
} else {
for (var j = 0; j < datasetIndex; j++) {
var posDS = this.chart.data.datasets[j];
if (Chart.helpers.isDatasetVisible(posDS) && posDS.xAxisID === xScale.id) {
base += posDS.data[index] > 0 ? posDS.data[index] : 0;
}
}
}
return xScale.getPixelForValue(base);
}
base = xScale.getPixelForValue(xScale.min);
if (xScale.beginAtZero || ((xScale.min <= 0 && xScale.max >= 0) || (xScale.min >= 0 && xScale.max <= 0))) {
base = xScale.getPixelForValue(0,0);
} else if (xScale.min < 0 && xScale.max < 0) {
base = xScale.getPixelForValue(xScale.max);
}
return base;
},getRuler: function () {
var xScale = this.getScaleForId(this.getDataset().xAxisID);
var yScale = this.getScaleForId(this.getDataset().yAxisID);
var datasetCount = this.getBarCount();
var tickHeight = (function () {
var min = yScale.getPixelForTick(1) - yScale.getPixelForTick(0);
for (var i = 2; i < this.getDataset().data.length; i++) {
min = Math.min(yScale.getPixelForTick(i) - yScale.getPixelForTick(i - 1),min);
}
return min;
}).call(this);
var categoryHeight = tickHeight * yScale.options.categoryPercentage;
var categorySpacing = (tickHeight - (tickHeight * yScale.options.categoryPercentage)) / 2;
var fullBarHeight = categoryHeight / datasetCount;
var barHeight = fullBarHeight * yScale.options.barPercentage;
var barSpacing = fullBarHeight - (fullBarHeight * yScale.options.barPercentage);
return {
datasetCount: datasetCount,tickHeight: tickHeight,categoryHeight: categoryHeight,categorySpacing: categorySpacing,fullBarHeight: fullBarHeight,barHeight: barHeight,barSpacing: barSpacing,};
},calculateBarHeight: function () {
var yScale = this.getScaleForId(this.getDataset().yAxisID);
var ruler = this.getRuler();
if (yScale.options.stacked) {
return ruler.categoryHeight;
}
return ruler.barHeight;
},calculateBarY: function (index,datasetIndex) {
var yScale = this.getScaleForId(this.getDataset().yAxisID);
var xScale = this.getScaleForId(this.getDataset().xAxisID);
var barIndex = this.getBarIndex(datasetIndex);
var ruler = this.getRuler();
var leftTick = yScale.getPixelForValue(null,datasetIndex,this.chart.isCombo);
leftTick -= this.chart.isCombo ? (ruler.tickHeight / 2) : 0;
if (yScale.options.stacked) {
return leftTick + (ruler.categoryHeight / 2) + ruler.categorySpacing;
}
return leftTick +
(ruler.barHeight / 2) +
ruler.categorySpacing +
(ruler.barHeight * barIndex) +
(ruler.barSpacing / 2) +
(ruler.barSpacing * barIndex);
},calculateBarX: function (index,datasetIndex) {
var xScale = this.getScaleForId(this.getDataset().xAxisID);
var yScale = this.getScaleForId(this.getDataset().yAxisID);
var value = this.getDataset().data[index];
if (xScale.options.stacked) {
var sumPos = 0,sumNeg = 0;
for (var i = 0; i < datasetIndex; i++) {
var ds = this.chart.data.datasets[i];
if (Chart.helpers.isDatasetVisible(ds)) {
if (ds.data[index] < 0) {
sumNeg += ds.data[index] || 0;
} else {
sumPos += ds.data[index] || 0;
}
}
}
if (value < 0) {
return xScale.getPixelForValue(sumNeg + value);
} else {
return xScale.getPixelForValue(sumPos + value);
}
return xScale.getPixelForValue(value);
}
return xScale.getPixelForValue(value);
}
});
然后
var config = { type: 'HorizontalBar',...
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