我有一个堆积柱形图。 为了突出显示任何单个切片，我们可以使用“highlightColors”选项，但是如果我必须突出显示整个栏，是否有任何可用的选项。我当前的代码如下所示：
seriesDefaults : {
renderer : $.jqplot.BarRenderer,
rendererOptions : {
barWidth : this.barWidth,
barMargin : this.barMargin,
highlightColors : '#fffefe'
}
这需要进行修改，以使整个栏突出显示。请指教
【问题讨论】：
我为它做了一些东西。 该解决方案涉及在高亮画布上进行自定义绘画。
它已集成到我为一个问题制作的示例中，该问题询问如何在堆积条形图的顶部添加总和，details are here。我还升级了它的代码，所以现在它是“条形图方向友好”。
以防万一JS代码也在下面：
$(document).ready(function() {
var ins = [2, 2, 3, 5];
var outs = [2, 4, 3, 5];
var swaps = [2, 2, 6, 5];
var passes = [2, 4, 6, 5];
var data = [ins, outs, swaps, passes, [3, 3, 3, 3]];
var series = [
{
label: 'IN',
pointLabels: {
labels: [2, 2, 3, 5]
}},
{
label: 'OUT',
pointLabels: {
labels: [2, 4, 3, 5]
}},
{
label: 'SWAP',
pointLabels: {
labels: [2, 2, 6, 5]
}},
{
label: 'PASS',
pointLabels: {
labels: [2, 4, 6, 5]
}},
{
label: 'INVISIBLE',
pointLabels: {
labels: ['∑ 8', '∑ 12', '∑ 18', '∑ 20']
},
show: false,
shadowAngle: 90,//for horizontal use (180 istead of 90)
rendererOptions: {
shadowDepth: 25,
shadowOffset: 2.5,
shadowAlpha: 0.01
}}
];
var ticks = ['Oi', 'Bike', 'Car', 'Truck'];
var plot = $.jqplot('chart', data, {
stackSeries: true,
seriesDefaults: {
renderer: $.jqplot.BarRenderer,
rendererOptions: {
barMargin: 20
//for horizontal uncomment this
// ,barDirection: 'horizontal'
},
pointLabels: {
show: true,
stackedValue: false,
location: 's'
}
},
axes: {
xaxis: {
renderer: $.jqplot.CategoryAxisRenderer,
ticks: ticks
}
//for horiozontal use the below instead
/*
yaxis: {
renderer: $.jqplot.CategoryAxisRenderer,
ticks: ticks
}
*/
},
legend: {
show: true,
location: 'ne',
placement: 'outside'
},
series: series,
title: "Oi title"
});
//color used for tooltip title
var color = 'rgb(50%,50%,100%)';
//start span of a tooltip's title
var spanStart = '<span style="font-size:14px;font-weight:bold;color:' + color + ';">';
$('#chart').bind('jqplotDataHighlight', function(ev, seriesIndex, pointIndex, data) {
var chart_left = $('#chart').offset().left;
var chart_top = $('#chart').offset().top;
var x = ev.pageX;
var y = ev.pageY;
var left = x;
var top = y;
var chartTooltipHTML = spanStart;
if (plot.axes.xaxis.u2p && plot.axes.yaxis.u2p) { // pierenderer do not have u2p
left = chart_left + plot.axes.xaxis.u2p(data[0]); // convert x axis units to pixels on grid
top = chart_top + plot.axes.yaxis.u2p(data[1]); // convert y axis units to pixels on grid
}
var barWidth = plot.series[0].barWidth;
//tells if the bar chart is vertical
var isVertical = false;
if (plot.series[0].barDirection === "vertical")
isVertical = true;
if (isVertical) left -= barWidth / 2;
else top -= barWidth / 2;
//for stacked chart
if(isVertical){
top = chart_top;
var sum = 0;
for (var i = 0; i < seriesIndex + 1; i++)
sum += plot.series[i].data[pointIndex][1];
top += plot.axes.yaxis.u2p(sum);
}else{
left = chart_left;
var sum = 0;
for (var i = 0; i < seriesIndex + 1; i++)
sum += plot.series[i].data[pointIndex][0];
left += plot.axes.xaxis.u2p(sum);
}
var seriesName = plot.series[seriesIndex].label;
console.log("seriesName = " + seriesName + " seriesIndex = " + seriesIndex + " pointIndex= " + pointIndex + " data= "+data+ " plot.series[seriesIndex].data= " + plot.series[seriesIndex].data[pointIndex]);
chartTooltipHTML += 'My custom tooltip: </span>'
+ '<br/><b>Count:</b> ' + data[1] //data[1] has count of movements
+ '<br/><b>Movement type:</b> ' + seriesName;
//start of part highlighting whole bar --- all bars (other than this bar is related to custom tooltip)
//for painting just grab the first highlight canvas as there could be 'n' of them where 'n' is the number of series, I think
var drawingCanvas = $(".jqplot-barRenderer-highlight-canvas")[0];
var rX = chart_left + plot.axes.xaxis.u2p(data[0]) - $(drawingCanvas).offset().left - barWidth/2;
var rY = chart_top + plot.axes.yaxis.u2p(data[1]) - $(drawingCanvas).offset().top - barWidth/2;
var rW = 0;
var rH = barWidth;
if (isVertical){
rW = rH;
rH = 0;
}
for(var i = 0; i < plot.series.length; i++){
if (isVertical) {
rH += plot.series[i].data[pointIndex][1];
}else{
rW += plot.series[i].data[pointIndex][0];
}
}
var canvasLeft = parseInt($(drawingCanvas).css('left'),10);
var canvasTop = parseInt($(drawingCanvas).css('top'),10);
if(isVertical){
rY = plot.axes.yaxis.u2p(rH) - canvasTop;//- $(drawingCanvas).offset().top;
rH = drawingCanvas.height - plot.axes.yaxis.u2p(rH) + canvasTop;//$(drawingCanvas).css('top').;
}else{
rX = 0;
rW = plot.axes.xaxis.u2p(rW) - canvasLeft;
}
console.log("rX= "+rX+"; rY= "+rY+"; rW= "+rW+"; rH = "+ rH + " drawingCanvas.height= "+drawingCanvas.height);
var context = drawingCanvas.getContext('2d');
context.clearRect(0, 0, drawingCanvas.width, drawingCanvas.height); context.strokeStyle = "#000000";
context.strokeRect(rX, rY, rW, rH);
//end of part doing custom painting of frame around all bars
var ct = $('#chartTooltip');
ct.css({
left: left,
top: top
}).html(chartTooltipHTML).show();
if (plot.series[0].barDirection === "vertical") {
var totalH = ct.height() + ct.padding().top + ct.padding().bottom + ct.border().top + ct.border().bottom;
ct.css({
top: top - totalH
});
}
});
// Bind a function to the unhighlight event to clean up after highlighting.
$('#chart').bind('jqplotDataUnhighlight', function(ev, seriesIndex, pointIndex, data) {
$('#chartTooltip').empty().hide();
});
});
【讨论】：