Javascript 如何动态添加数据做谷歌时间线图?
事实上,我正在尝试使用谷歌时间线图制作一个餐厅预订系统 我只是在尝试时间线的功能,然后单击一次,我想用表单中的值将新数据添加到图表中 随后,数据将保存在数据库中,甚至在页面加载时从数据库中加载 下面是javascript代码Javascript 如何动态添加数据做谷歌时间线图?,javascript,charts,google-visualization,Javascript,Charts,Google Visualization,事实上,我正在尝试使用谷歌时间线图制作一个餐厅预订系统 我只是在尝试时间线的功能,然后单击一次,我想用表单中的值将新数据添加到图表中 随后,数据将保存在数据库中,甚至在页面加载时从数据库中加载 下面是javascript代码 <script type="text/javascript"> google.charts.load("current", { packages: ["timeline"] }); google.charts.setOnLoadCallback
<script type="text/javascript">
google.charts.load("current", { packages: ["timeline"] });
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var container = document.getElementById('timeline');
var chart = new google.visualization.Timeline(container);
var dataTable = new google.visualization.DataTable();
dataTable.addColumn({ type: 'string', id: 'Tavolo' });
dataTable.addColumn({ type: 'date', id: 'Start' });
dataTable.addColumn({ type: 'date', id: 'End' });
dataTable.addRows([
['Tavolo 1', new Date(0, 0, 0, 12, 00, 0), new Date(0, 0, 0, 12, 00, 0)],
['Tavolo 2', new Date(0, 0, 0, 12, 00, 0), new Date(0, 0, 0, 12, 00, 0)],
['Tavolo 3', new Date(0, 0, 0, 12, 30, 0), new Date(0, 0, 0, 14, 0, 0)],
['Tavolo 3', new Date(0, 0, 0, 14, 30, 0), new Date(0, 0, 0, 16, 0, 0)],
['Tavolo 3', new Date(0, 0, 0, 16, 30, 0), new Date(0, 0, 0, 18, 0, 0)],
['Tavolo 4', new Date(0, 0, 0, 14, 30, 0), new Date(0, 0, 0, 16, 0, 0)],
['Tavolo 4', new Date(0, 0, 0, 16, 30, 0), new Date(0, 0, 0, 18, 0, 0)],
['Tavolo 5', new Date(0, 0, 0, 12, 0, 0), new Date(0, 0, 0, 13, 30, 0)],
['Tavolo 6', new Date(0, 0, 0, 14, 0, 0), new Date(0, 0, 0, 15, 30, 0)],
['Tavolo 7', new Date(0, 0, 0, 12, 30, 0), new Date(0, 0, 0, 14, 0, 0)],
['Tavolo 8', new Date(0, 0, 0, 14, 30, 0), new Date(0, 0, 0, 16, 0, 0)],
['Tavolo 8', new Date(0, 0, 0, 16, 30, 0), new Date(0, 0, 0, 18, 0, 0)],
['Tavolo 9', new Date(0, 0, 0, 14, 30, 0), new Date(0, 0, 0, 16, 0, 0)]]);
var options = {
timeline: { singleColor: '#ff0000' }
};
chart.draw(dataTable, options);
// Function to remove 0 value bars
(function () {
var el = container.getElementsByTagName("rect");
var width = 100000000;
var elToRem = [];
for (var i = 0; i < el.length; i++) {
var cwidth = parseInt(el[i].getAttribute("width"));
if (cwidth < width) {
elToRem = [el[i]];
width = cwidth;
}
else if (cwidth == width) {
elToRem.push(el[i]);
}
}
for (var i = 0; i < elToRem.length; i++)
elToRem[i].setAttribute("fill", "none");
})();
}
function addPrenotazione() {
dataTable.addRows(["Tavolo" + $("#tavolo").val(), new Date($("#datainizio").val()), new Date($("#datafine").val())]);
}
</script>
load(“当前”{packages:[“timeline”]});
google.charts.setOnLoadCallback(drawChart);
函数绘图图(){
var container=document.getElementById('timeline');
var chart=newgoogle.visualization.Timeline(容器);
var dataTable=new google.visualization.dataTable();
addColumn({type:'string',id:'Tavolo'});
addColumn({type:'date',id:'Start'});
addColumn({type:'date',id:'End'});
dataTable.addRows([
['Tavolo 1',新日期(0,0,0,12,00,0),新日期(0,0,0,12,00,0)],
['Tavolo 2',新日期(0,0,0,12,00,0),新日期(0,0,0,12,00,0)],
['Tavolo 3',新日期(0,0,0,12,30,0),新日期(0,0,0,14,0,0)],
['Tavolo 3',新日期(0,0,0,14,30,0),新日期(0,0,0,16,0,0)],
['Tavolo 3',新日期(0,0,0,16,30,0),新日期(0,0,0,18,0,0)],
['Tavolo 4',新日期(0,0,0,14,30,0),新日期(0,0,0,16,0,0)],
['Tavolo 4',新日期(0,0,0,16,30,0),新日期(0,0,0,18,0,0)],
['Tavolo 5',新日期(0,0,0,12,0,0),新日期(0,0,0,13,30,0)],
['Tavolo 6',新日期(0,0,0,14,0,0),新日期(0,0,0,15,30,0)],
['Tavolo 7',新日期(0,0,0,12,30,0),新日期(0,0,0,14,0,0)],
['Tavolo 8',新日期(0,0,0,14,30,0),新日期(0,0,0,16,0,0)],
['Tavolo 8',新日期(0,0,0,16,30,0),新日期(0,0,0,18,0,0)],
新的日期(0,0,0,14,30,0),新的日期(0,0,0,16,0,0)];
变量选项={
时间线:{singleColor:'#ff0000'}
};
图表绘制(数据表、选项);
//函数删除0个值栏
(函数(){
var el=container.getElementsByTagName(“rect”);
风险值宽度=100000000;
var elToRem=[];
对于(var i=0;i
每当添加新数据或更改选项时,必须重新绘制图表
function addPrenotazione() {
dataTable.addRows(["Tavolo" + $("#tavolo").val(), new Date($("#datainizio").val()), new Date($("#datafine").val())]);
chart.draw(dataTable, options);
}
将上述函数移到绘图图函数中,
这将允许函数访问数据表
和图表
变量
也不建议在元素上使用内联事件处理程序
onclick="addPrenotazione"
相反,将事件也添加到drawChart
函数中
document.getElementById('prenota').addEventListener('click', addPrenotazione); // 'prenota' or whatever the button id is...
最后,在修改图表元素时,等待'ready'
,
为确保图表已完成绘制
// Function to remove 0 value bars
google.visualization.events.addListener(chart, 'ready', function () {
var el = container.getElementsByTagName("rect");
var width = 100000000;
var elToRem = [];
for (var i = 0; i < el.length; i++) {
var cwidth = parseInt(el[i].getAttribute("width"));
if (cwidth < width) {
elToRem = [el[i]];
width = cwidth;
}
else if (cwidth == width) {
elToRem.push(el[i]);
}
}
for (var i = 0; i < elToRem.length; i++)
elToRem[i].setAttribute("fill", "none");
});
这是在向图表中添加值,但问题是插入数据不正确图表变得不可读,这是使用新日期($(“#Datanizio”).val()从datatime local获取日期值的正确方法吗?是否检查屏幕截图,Arrivo是Datanizio的标签,它的值是19/03/2019 12:00周二2019年3月19日12:21:00 GMT+0100(Ora标准dell'Europa centrale),这是新日期($(“Datanizio”).val())的输出,如果我将其放入警报中,在这种情况下,您应该能够返回到新日期($(“#Dataniziio”).val())
google.charts.load('current', {
packages: ['timeline']
}).then(function () {
var container = document.getElementById('timeline');
var chart = new google.visualization.Timeline(container);
var dataTable = new google.visualization.DataTable();
dataTable.addColumn({ type: 'string', id: 'Tavolo' });
dataTable.addColumn({ type: 'date', id: 'Start' });
dataTable.addColumn({ type: 'date', id: 'End' });
dataTable.addRows([
['Tavolo 1', new Date(0, 0, 0, 12, 00, 0), new Date(0, 0, 0, 12, 00, 0)],
['Tavolo 2', new Date(0, 0, 0, 12, 00, 0), new Date(0, 0, 0, 12, 00, 0)],
['Tavolo 3', new Date(0, 0, 0, 12, 30, 0), new Date(0, 0, 0, 14, 0, 0)],
['Tavolo 3', new Date(0, 0, 0, 14, 30, 0), new Date(0, 0, 0, 16, 0, 0)],
['Tavolo 3', new Date(0, 0, 0, 16, 30, 0), new Date(0, 0, 0, 18, 0, 0)],
['Tavolo 4', new Date(0, 0, 0, 14, 30, 0), new Date(0, 0, 0, 16, 0, 0)],
['Tavolo 4', new Date(0, 0, 0, 16, 30, 0), new Date(0, 0, 0, 18, 0, 0)],
['Tavolo 5', new Date(0, 0, 0, 12, 0, 0), new Date(0, 0, 0, 13, 30, 0)],
['Tavolo 6', new Date(0, 0, 0, 14, 0, 0), new Date(0, 0, 0, 15, 30, 0)],
['Tavolo 7', new Date(0, 0, 0, 12, 30, 0), new Date(0, 0, 0, 14, 0, 0)],
['Tavolo 8', new Date(0, 0, 0, 14, 30, 0), new Date(0, 0, 0, 16, 0, 0)],
['Tavolo 8', new Date(0, 0, 0, 16, 30, 0), new Date(0, 0, 0, 18, 0, 0)],
['Tavolo 9', new Date(0, 0, 0, 14, 30, 0), new Date(0, 0, 0, 16, 0, 0)]
]);
var options = {
timeline: { singleColor: '#ff0000' }
};
chart.draw(dataTable, options);
// Function to remove 0 value bars
google.visualization.events.addListener(chart, 'ready', function () {
var el = container.getElementsByTagName("rect");
var width = 100000000;
var elToRem = [];
for (var i = 0; i < el.length; i++) {
var cwidth = parseInt(el[i].getAttribute("width"));
if (cwidth < width) {
elToRem = [el[i]];
width = cwidth;
}
else if (cwidth == width) {
elToRem.push(el[i]);
}
}
for (var i = 0; i < elToRem.length; i++)
elToRem[i].setAttribute("fill", "none");
});
document.getElementById('prenota').addEventListener('click', addPrenotazione);
function addPrenotazione() {
dataTable.addRows(["Tavolo" + $("#tavolo").val(), new Date($("#datainizio").val()), new Date($("#datafine").val())]);
chart.draw(dataTable, options);
}
});
function addPrenotazione() {
var dateBeg = new Date($("#datainizio").val());
var dateEnd = new Date($("#datafine").val());
dataTable.addRow(["Tavolo" + $("#tavolo").val(), new Date(0, 0, 0, dateBeg.getHours(), dateBeg.getMinutes(), dateBeg.getSeconds()), new Date(0, 0, 0, dateEnd.getHours(), dateEnd.getMinutes(), dateEnd.getSeconds())]);
chart.draw(dataTable, options);
}