Javascript 如何在chart.js中的图形和X/Y比例之间添加填充?
我用Chart.js得到了一个简单的折线图 它应该是这样的:(Photoshop,我用红线标记了填充物) chart.js当前的外观: 如您所见,图形点的轮廓与底部的X比例重叠,例如“2:00 PM”,与左侧的Y比例重叠,例如“0” 我的折线图代码: HTML: 图表选项: 在搜索问号chart.js后,我发现了一个非常类似的问题,但效果不太好,因为悬停时解决方案有问题,而且不是折线图。() 我希望我提供了足够的信息,有人可以帮助我,因为我真的对JavaScript一无所知。Javascript 如何在chart.js中的图形和X/Y比例之间添加填充?,javascript,canvas,chart.js,Javascript,Canvas,Chart.js,我用Chart.js得到了一个简单的折线图 它应该是这样的:(Photoshop,我用红线标记了填充物) chart.js当前的外观: 如您所见,图形点的轮廓与底部的X比例重叠,例如“2:00 PM”,与左侧的Y比例重叠,例如“0” 我的折线图代码: HTML: 图表选项: 在搜索问号chart.js后,我发现了一个非常类似的问题,但效果不太好,因为悬停时解决方案有问题,而且不是折线图。() 我希望我提供了足够的信息,有人可以帮助我,因为我真的对JavaScript一无所知。 提前感谢 实际上,
提前感谢 实际上,您不需要链接解决方案的所有复杂性,因为
有了这些注意事项,您只需要做一些更改(只需在选项名称上按住Ctrl+F键即可找到要替换的行) 我们基本上是从一个比我们需要的低1步的值开始。这使图表上升。现在我们需要做的就是隐藏这个额外的比例标签,我们用它来做
scaleLabel: function (d) {
if (d.value < 0)
return '';
else
return d.value + ' ';
},
假设值都大于0时,您不介意额外的标签,这将很好地工作(我们的scaleLabel选项负责隐藏负标签,并且只隐藏负标签)
请注意,如果您使用的是其他图表,而您不希望应用此功能,则需要在完成图表初始化后还原此功能
小提琴-谢谢你指出这一点!我已经在链接答案的提琴中修复了它。@potatopeelings感谢您更新了您伟大的解决方案!你能不能也为线条图创建解决方案,或者解释一下我自己怎么做?我的JavaScript技能真的很像0——所以我只是生活在这些库和像你这样帮助调整它们的人中。提前感谢!我对您当前的代码做了一些假设。如果这些不正确,请告诉我。顺便说一下,你不必像你的问题那样设置
图表.defaults.global。您只需覆盖您喜欢的Chart.defaults.global.scaleSteps=7;Chart.defaults.global.animation=false代码>对于您的单个图表选项,您只需要在选项对象中包含要覆盖的选项-您可以忽略其他选项。首先:非常感谢!编辑:按enter键时,它总是自动发送答案。所以:我真的不知道我的数据将在什么范围内。为什么我现在硬编码:否则,scala将进入下一个100步,我不想这样做。我想计算一个良好的开始/步长和PHP中的步长值总数。这意味着您的答案本身有效,但不适用于其他数据集,因为最后的填充会有所不同。我希望你明白我的意思。但是谢谢你抽出时间来!再次感谢您的编辑!填充看起来很好,但是没有我的Scala值,我得到了一个不必要的大y-Scala。图片:是否可以使图形中的最高值等于Y刻度上的最高点?或者可能是一个没有现在那么大的差距。无论如何,再次感谢你的时间!尝试使用calculateScaleRange函数来减少scalerAge.max值,直到它在数据最大值的1个步长内(您需要减少scalerAge.steps以匹配顺便说一句)-看看这里修改的函数,我真的不知道如何按照我想要的方式调整它,但这把小提琴似乎已经足够好了。我可以非常感谢你,并祝你有一个伟大的一天,因为你的所有帮助!这很简单。我们允许chart.js进行比例计算。然后,我们将标尺顶部调整为与最大数据值相差2步以内。你想做什么改变?Bte如果它太靠近你的圆圈边缘,你会被剪掉。
Chart.defaults.global = {
// Boolean - Whether to animate the chart
animation: false,
// Number - Number of animation steps
animationSteps: 60,
// String - Animation easing effect
// Possible effects are:
// [easeInOutQuart, linear, easeOutBounce, easeInBack, easeInOutQuad,
// easeOutQuart, easeOutQuad, easeInOutBounce, easeOutSine, easeInOutCubic,
// easeInExpo, easeInOutBack, easeInCirc, easeInOutElastic, easeOutBack,
// easeInQuad, easeInOutExpo, easeInQuart, easeOutQuint, easeInOutCirc,
// easeInSine, easeOutExpo, easeOutCirc, easeOutCubic, easeInQuint,
// easeInElastic, easeInOutSine, easeInOutQuint, easeInBounce,
// easeOutElastic, easeInCubic]
animationEasing: "easeInOutQuart",
// Boolean - If we should show the scale at all
showScale: true,
// Boolean - If we want to override with a hard coded scale
scaleOverride: true,
// ** Required if scaleOverride is true **
// Number - The number of steps in a hard coded scale
scaleSteps: 7,
// Number - The value jump in the hard coded scale
scaleStepWidth: 18,
// Number - The scale starting value
scaleStartValue: 0,
// String - Colour of the scale line
scaleLineColor: "#565a60",
// Number - Pixel width of the scale line
scaleLineWidth: 0.1,
// Boolean - Whether to show labels on the scale
scaleShowLabels: true,
// Interpolated JS string - can access value
scaleLabel: "<%=value%>",
// Boolean - Whether the scale should stick to integers, not floats even if drawing space is there
scaleIntegersOnly: true,
// Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
scaleBeginAtZero: false,
// String - Scale label font declaration for the scale label
scaleFontFamily: "'Open Sans', sans-serif",
// Number - Scale label font size in pixels
scaleFontSize: 13,
// String - Scale label font weight style
scaleFontStyle: "500",
// String - Scale label font colour
scaleFontColor: "#7c8189",
// Boolean - whether or not the chart should be responsive and resize when the browser does.
responsive: true,
// Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container
maintainAspectRatio: false,
// Boolean - Determines whether to draw tooltips on the canvas or not
showTooltips: true,
// Function - Determines whether to execute the customTooltips function instead of drawing the built in tooltips (See [Advanced - External Tooltips](#advanced-usage-custom-tooltips))
customTooltips: false,
// Array - Array of string names to attach tooltip events
tooltipEvents: ["mousemove", "touchstart", "touchmove"],
// String - Tooltip background colour
tooltipFillColor: "#42454a",
// String - Tooltip label font declaration for the scale label
tooltipFontFamily: "'Open Sans', sans-serif",
// Number - Tooltip label font size in pixels
tooltipFontSize: 15,
// String - Tooltip font weight style
tooltipFontStyle: "normal",
// String - Tooltip label font colour
tooltipFontColor: "#e7e7e7",
// String - Tooltip title font declaration for the scale label
tooltipTitleFontFamily: "'Open Sans', sans-serif",
// Number - Tooltip title font size in pixels
tooltipTitleFontSize: 14,
// String - Tooltip title font weight style
tooltipTitleFontStyle: "regular",
// String - Tooltip title font colour
tooltipTitleFontColor: "#fff",
// Number - pixel width of padding around tooltip text
tooltipYPadding: 6,
// Number - pixel width of padding around tooltip text
tooltipXPadding: 6,
// Number - Size of the caret on the tooltip
tooltipCaretSize: 8,
// Number - Pixel radius of the tooltip border
tooltipCornerRadius: 0,
// Number - Pixel offset from point x to tooltip edge
tooltipXOffset: 10,
// String - Template string for single tooltips
tooltipTemplate: "On <%if (label){%><%=label%> there were <%}%><%= value %> active users",
// String - Template string for multiple tooltips
multiTooltipTemplate: "<%= value %>",
// Function - Will fire on animation progression.
onAnimationProgress: function(){},
// Function - Will fire on animation completion.
onAnimationComplete: function(){}
}
var usageData = {
labels : ["2:00 PM","4:00 PM","6:00 PM","8:00 PM","10:00 PM","0:00 AM","2:00 AM"],
datasets : [
{
strokeColor : "#61666c",
pointColor : "#4e82c9",
pointStrokeColor : "#565a60",
data : [0,120,120,100,60,40,0]
}
]
}
var options = {
///Boolean - Whether grid lines are shown across the chart
scaleShowGridLines : false,
//String - Colour of the grid lines
scaleGridLineColor : "rgba(0,0,0,.05)",
//Number - Width of the grid lines
scaleGridLineWidth : 1,
//Boolean - Whether to show horizontal lines (except X axis)
scaleShowHorizontalLines: true,
//Boolean - Whether to show vertical lines (except Y axis)
scaleShowVerticalLines: true,
//Boolean - Whether the line is curved between points
bezierCurve : false,
//Number - Tension of the bezier curve between points
bezierCurveTension : 0.4,
//Boolean - Whether to show a dot for each point
pointDot : true,
//Number - Radius of each point dot in pixels
pointDotRadius : 18,
//Number - Pixel width of point dot stroke
pointDotStrokeWidth : 8,
//Number - amount extra to add to the radius to cater for hit detection outside the drawn point
pointHitDetectionRadius : 20,
//Boolean - Whether to show a stroke for datasets
datasetStroke : true,
//Number - Pixel width of dataset stroke
datasetStrokeWidth : 4,
//Boolean - Whether to fill the dataset with a colour
datasetFill : false,
//String - A legend template
legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokeColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"
};
var serverUsage = document.getElementById('server-usage').getContext('2d');
new Chart(serverUsage).Line(usageData, options);
scaleSteps: 5,
// Number - The value jump in the hard coded scale
scaleStepWidth: 50,
// Number - The scale starting value
scaleStartValue: -50,
scaleLabel: function (d) {
if (d.value < 0)
return '';
else
return d.value + ' ';
},
// this applies to all chart instances that use this scale!
var originalCalculateScaleRange = Chart.helpers.calculateScaleRange;
Chart.helpers.calculateScaleRange = function () {
var scaleRange = originalCalculateScaleRange.apply(this, arguments);
// add 1 unit at the top and bottom
scaleRange.min = scaleRange.min - scaleRange.stepValue;
scaleRange.max = scaleRange.max + scaleRange.stepValue;
scaleRange.steps = scaleRange.steps + 2;
return scaleRange;
}