如何在两行中以每行不同的字体大小显示标题？ [英] How would I be able display the title in two lines with a different font size for each line?

查看：48
本文介绍了如何在两行中以每行不同的字体大小显示标题？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在使用Google Chart API创建时间线图，并希望将图的标题修改为两行。

I am using Google Chart API to create a time-line graph and want to modify the title of the graph into two lines.

问题：

如何显示具有不同字体大小的两行图表标题。

How would I be able display the two lined chart title, with different font sizes.

当前输出：

理想输出：

相关研究：

我唯一能找到的就是有人试图用饼图来做到这一点，但是我尝试了

The only thing I could find was was someone trying to do this with a pie chart, but I tried and couldn't make it work.

  • Two line title in google chart api

MWE： 

google.charts.load('current', {'packages':['corechart']})
google.charts.setOnLoadCallback(drawChart);

function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date \& Time');
data.addColumn('number', "Triggered Events");
data.addColumn({type: 'string', role: 'tooltip'});
data.addRows([
	[new Date(2021, 11, 31, 0, 0, 0), 0, ''],


	[new Date(2021, 11, 31, 3, 41, 44), 0, ''],
	[new Date(2021, 11, 31, 3, 41, 44), 1, 'Event Duration: 2h 14m 57s\nMax Val: XYZ °C\nStart Time: 03:41:44\nEnd Time: 05:56:41'],

	[new Date(2021, 11, 31, 5, 56, 41), 1, 'Event Duration: 2h 14m 57s\nMax Val: XYZ °C\nStart Time: 03:41:44\nEnd Time: 05:56:41'],
	[new Date(2021, 11, 31, 5, 56, 41), 0, ''],

	[new Date(2021, 11, 31, 9, 40, 48), 0, ''],
	[new Date(2021, 11, 31, 9, 40, 48), 1, 'Event Duration: 2h 30m 17s\nMax Val: XYZ °C\nStart Time: 09:40:48\nEnd Time: 12:11:05'],

	[new Date(2021, 11, 31, 12, 11, 5), 1, 'Event Duration: 2h 30m 17s\nMax Val: XYZ °C\nStart Time: 09:40:48\nEnd Time: 12:11:05'],
	[new Date(2021, 11, 31, 12, 11, 5), 0, ''],

	[new Date(2021, 11, 31, 12, 45, 57), 0, ''],
	[new Date(2021, 11, 31, 12, 45, 57), 1, 'Event Duration: 2h 28m 9s\nMax Val: XYZ °C\nStart Time: 12:45:57\nEnd Time: 15:14:06'],

	[new Date(2021, 11, 31, 15, 14, 6), 1, 'Event Duration: 2h 28m 9s\nMax Val: XYZ °C\nStart Time: 12:45:57\nEnd Time: 15:14:06'],
	[new Date(2021, 11, 31, 15, 14, 6), 0, ''],

	[new Date(2022, 0, 1, 0, 0, 0), 0, '']
]);   //End data.addRows([])

var options = {
	title:'Generated 3 Events\nAverage Event Duration: 2h 24m 27s',
	tooltip: {textStyle: {fontName: 'Lucida Console', fontSize: 12} },
	width: 1100,
	height: 500,
	lineWidth: 1,
	chartArea:{width: 900, height:150 },
	series: { 0: { color: '#188785', areaOpacity: 1.0}},
	legend: {position: 'none'},
	enableInteractivity: true,

	hAxis: {
		title: 'Date \& Time',
		titleTextStyle: {bold: false, italic: false},
		format: 'dd/MM/yyyy HH:mm',
		slantedText:true,
		slantedTextAngle:90,
		gridlines: {color: 'none'},
		},  //End hAxis

	vAxis: {
		title: 'Events Triggered',
		titleTextStyle: {bold: false, italic: false},
		viewWindow: {min: 0, max: 1},
		ticks: [{ v: 0, f: 'Event Off'}, {v: 1, f: 'Event On'}],
		gridlines: { color: 'transparent' }
		},  //End vAxis

	};  //End var options

var chart = new google.visualization.AreaChart(document.getElementById('chart_div'));
chart.draw(data, options);

}   //End drawChart()

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

推荐答案

未知其他答案，对图表的修改，

应该仅在图表的就绪 事件中进行。

，否则尝试进行修改时，元素可能尚不存在。

unbeknownst to the other answer, modifications to the chart,
should only be made on the chart's 'ready' event.
else, the elements may not exist yet, when the modification is tried.

在这里，我们确定要更改的标签的文本内容。

找到包含该内容的标签，

然后减小元素的字体大小。

here, we determine the text content of the label we want to change.
find the label containing the content,
then reduce the font size of the element. 

// listen for chart ready event
google.visualization.events.addListener(chart, 'ready', function () {
  // get label copy to change
  var labelContent = options.title.substring(options.title.indexOf('\n') + 1);

  // get chart labels
  var labels = chart.getContainer().getElementsByTagName('text');

  // find chart label
  for (var i = 0; i < labels.length; i++) {
    if (labels[i].textContent === labelContent) {
      // reduce font size
      var currentFontSize = parseInt(labels[i].getAttribute('font-size'));
      labels[i].setAttribute('font-size', currentFontSize - 4);
      break;
    }
  }
});

注意：字体大小可能会有所不同，具体取决于图表的大小。
$ b除非在图表选项中显式设置了字体大小，否则$ b。

，还必须在创建图表后，

和绘制图表之前分配事件侦听器。

note: the font size may vary, depending on the size of the chart.
unless the font size is explicitly set in the chart options.
also, the event listener must be assigned after the chart is created,
and before the chart is drawn.

请参阅以下工作摘要...

see following working snippet... 

google.charts.load('current', {'packages':['corechart']})
google.charts.setOnLoadCallback(drawChart);

function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date \& Time');
data.addColumn('number', "Triggered Events");
data.addColumn({type: 'string', role: 'tooltip'});
data.addRows([
	[new Date(2021, 11, 31, 0, 0, 0), 0, ''],


	[new Date(2021, 11, 31, 3, 41, 44), 0, ''],
	[new Date(2021, 11, 31, 3, 41, 44), 1, 'Event Duration: 2h 14m 57s\nMax Val: XYZ °C\nStart Time: 03:41:44\nEnd Time: 05:56:41'],

	[new Date(2021, 11, 31, 5, 56, 41), 1, 'Event Duration: 2h 14m 57s\nMax Val: XYZ °C\nStart Time: 03:41:44\nEnd Time: 05:56:41'],
	[new Date(2021, 11, 31, 5, 56, 41), 0, ''],

	[new Date(2021, 11, 31, 9, 40, 48), 0, ''],
	[new Date(2021, 11, 31, 9, 40, 48), 1, 'Event Duration: 2h 30m 17s\nMax Val: XYZ °C\nStart Time: 09:40:48\nEnd Time: 12:11:05'],

	[new Date(2021, 11, 31, 12, 11, 5), 1, 'Event Duration: 2h 30m 17s\nMax Val: XYZ °C\nStart Time: 09:40:48\nEnd Time: 12:11:05'],
	[new Date(2021, 11, 31, 12, 11, 5), 0, ''],

	[new Date(2021, 11, 31, 12, 45, 57), 0, ''],
	[new Date(2021, 11, 31, 12, 45, 57), 1, 'Event Duration: 2h 28m 9s\nMax Val: XYZ °C\nStart Time: 12:45:57\nEnd Time: 15:14:06'],

	[new Date(2021, 11, 31, 15, 14, 6), 1, 'Event Duration: 2h 28m 9s\nMax Val: XYZ °C\nStart Time: 12:45:57\nEnd Time: 15:14:06'],
	[new Date(2021, 11, 31, 15, 14, 6), 0, ''],

	[new Date(2022, 0, 1, 0, 0, 0), 0, '']
]);   //End data.addRows([])

var options = {
	title:'Generated 3 Events\nAverage Event Duration: 2h 24m 27s',
	tooltip: {textStyle: {fontName: 'Lucida Console', fontSize: 12} },
	width: 1100,
	height: 500,
	lineWidth: 1,
	chartArea:{width: 900, height:150 },
	series: { 0: { color: '#188785', areaOpacity: 1.0}},
	legend: {position: 'none'},
	enableInteractivity: true,

	hAxis: {
		title: 'Date \& Time',
		titleTextStyle: {bold: false, italic: false},
		format: 'dd/MM/yyyy HH:mm',
		slantedText:true,
		slantedTextAngle:90,
		gridlines: {color: 'none'},
		},  //End hAxis

	vAxis: {
		title: 'Events Triggered',
		titleTextStyle: {bold: false, italic: false},
		viewWindow: {min: 0, max: 1},
		ticks: [{ v: 0, f: 'Event Off'}, {v: 1, f: 'Event On'}],
		gridlines: { color: 'transparent' }
		},  //End vAxis

	};  //End var options

  var chart = new google.visualization.AreaChart(document.getElementById('chart_div'));

  // listen for chart ready event
  google.visualization.events.addListener(chart, 'ready', function () {
    // get label copy to change
    var labelContent = options.title.substring(options.title.indexOf('\n') + 1);

    // get chart labels
    var labels = chart.getContainer().getElementsByTagName('text');

    // find chart label
    for (var i = 0; i < labels.length; i++) {
      if (labels[i].textContent === labelContent) {
        // reduce font size
        var currentFontSize = parseInt(labels[i].getAttribute('font-size'));
        labels[i].setAttribute('font-size', currentFontSize - 4);
        break;
      }
    }
  });

  chart.draw(data, options);
}

<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

编辑

对于多行，请使用 split 方法，而不是 substring 。

for multiple lines, use the split method, instead of substring.

然后更改所有匹配标签的字体大小，但第一个除外。

then change the font size of all matching labels, except the first. 

// get label copy to change
var labelContent = options.title.split('\n');

// get chart labels
var labels = chart.getContainer().getElementsByTagName('text');

// loop chart title lines, beginning with second line
for (var l = 1; l < labelContent.length; l++) {
  // find chart label
  for (var i = 0; i < labels.length; i++) {
    if (labels[i].textContent === labelContent[l]) {
      // reduce font size
      var currentFontSize = parseInt(labels[i].getAttribute('font-size'));
      labels[i].setAttribute('font-size', currentFontSize - 4);
      break;
    }
  }
}

请参阅以下工作片段。

see following working snippet... 

google.charts.load('current', {'packages':['corechart']})
google.charts.setOnLoadCallback(drawChart);

function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date \& Time');
data.addColumn('number', "Triggered Events");
data.addColumn({type: 'string', role: 'tooltip'});
data.addRows([
	[new Date(2021, 11, 31, 0, 0, 0), 0, ''],


	[new Date(2021, 11, 31, 3, 41, 44), 0, ''],
	[new Date(2021, 11, 31, 3, 41, 44), 1, 'Event Duration: 2h 14m 57s\nMax Val: XYZ °C\nStart Time: 03:41:44\nEnd Time: 05:56:41'],

	[new Date(2021, 11, 31, 5, 56, 41), 1, 'Event Duration: 2h 14m 57s\nMax Val: XYZ °C\nStart Time: 03:41:44\nEnd Time: 05:56:41'],
	[new Date(2021, 11, 31, 5, 56, 41), 0, ''],

	[new Date(2021, 11, 31, 9, 40, 48), 0, ''],
	[new Date(2021, 11, 31, 9, 40, 48), 1, 'Event Duration: 2h 30m 17s\nMax Val: XYZ °C\nStart Time: 09:40:48\nEnd Time: 12:11:05'],

	[new Date(2021, 11, 31, 12, 11, 5), 1, 'Event Duration: 2h 30m 17s\nMax Val: XYZ °C\nStart Time: 09:40:48\nEnd Time: 12:11:05'],
	[new Date(2021, 11, 31, 12, 11, 5), 0, ''],

	[new Date(2021, 11, 31, 12, 45, 57), 0, ''],
	[new Date(2021, 11, 31, 12, 45, 57), 1, 'Event Duration: 2h 28m 9s\nMax Val: XYZ °C\nStart Time: 12:45:57\nEnd Time: 15:14:06'],

	[new Date(2021, 11, 31, 15, 14, 6), 1, 'Event Duration: 2h 28m 9s\nMax Val: XYZ °C\nStart Time: 12:45:57\nEnd Time: 15:14:06'],
	[new Date(2021, 11, 31, 15, 14, 6), 0, ''],

	[new Date(2022, 0, 1, 0, 0, 0), 0, '']
]);   //End data.addRows([])

var options = {
	title:'Generated 3 Events\nAverage Event Duration: 2h 24m 27s\nLine 3\nLine 4\nLine 5',
	tooltip: {textStyle: {fontName: 'Lucida Console', fontSize: 12} },
	width: 1100,
	height: 500,
	lineWidth: 1,
	chartArea:{width: 900, height:150 },
	series: { 0: { color: '#188785', areaOpacity: 1.0}},
	legend: {position: 'none'},
	enableInteractivity: true,

	hAxis: {
		title: 'Date \& Time',
		titleTextStyle: {bold: false, italic: false},
		format: 'dd/MM/yyyy HH:mm',
		slantedText:true,
		slantedTextAngle:90,
		gridlines: {color: 'none'},
		},  //End hAxis

	vAxis: {
		title: 'Events Triggered',
		titleTextStyle: {bold: false, italic: false},
		viewWindow: {min: 0, max: 1},
		ticks: [{ v: 0, f: 'Event Off'}, {v: 1, f: 'Event On'}],
		gridlines: { color: 'transparent' }
		},  //End vAxis

	};  //End var options

  var chart = new google.visualization.AreaChart(document.getElementById('chart_div'));

  // listen for chart ready event
  google.visualization.events.addListener(chart, 'ready', function () {
    // get label copy to change
    var labelContent = options.title.split('\n');

    // get chart labels
    var labels = chart.getContainer().getElementsByTagName('text');

    // loop chart title lines, beginning with second line
    for (var l = 1; l < labelContent.length; l++) {
      // find chart label
      for (var i = 0; i < labels.length; i++) {
        if (labels[i].textContent === labelContent[l]) {
          // reduce font size
          var currentFontSize = parseInt(labels[i].getAttribute('font-size'));
          labels[i].setAttribute('font-size', currentFontSize - 4);
          break;
        }
      }
    }
  });

  chart.draw(data, options);
}

<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

这篇关于如何在两行中以每行不同的字体大小显示标题？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

查看全文
相关文章
前端开发最新文章
热门教程
热门工具
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆