Google chart redraw/scale on window resize

问题:

How do I redraw/rescale a google linechart on window resize?

回答1:

To redraw only when the window resize is completed and avoid multiple triggers, I think is better create an event:

//create trigger to resizeEnd event     
$(window).resize(function() {
    if(this.resizeTO) clearTimeout(this.resizeTO);
    this.resizeTO = setTimeout(function() {
        $(this).trigger('resizeEnd');
    }, 500);
});

//redraw graph when window resize is completed  
$(window).on('resizeEnd', function() {
    drawChart(data);
});

回答2:

The original code by Google simply does this at the end:

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

Changing it with a little javascript you can scale it when the window resizes:

function resize () {
    var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
    chart.draw(data, options);
}

window.onload = resize;
window.onresize = resize;

回答3:

Since the window.resize event fires multiple times on each resize event, I believe that the best solution is to use smartresize.js and use smartdraw(). This limits the number of chart redraw’s per window.resize.

By using the provided js you can do it as simply as this:

// Instantiate and draw our user charts, passing in some options (as you probably were doing it)
var chart = new google.visualization.LineChart(document.getElementById('div_chart'));
chart.draw(data, options);

// And then:
$(window).smartresize(function () {
    chart.draw(data, options);
});

回答4:

This is the simplest way I can work out of doing this without causing too much stress to the server:

    var chart1 = "done";

$(window).resize(function() {
if(chart1=="done"){
chart1 = "waiting";
setTimeout(function(){drawChart();chart1 = "done"},1000);
}
});

All it does is wait 1 second before the chart reloads and doesn't let the function call again in this waiting period. as window resize functions are called multiple times any time you change the window size this helps make the function only actually work once each time you change the window size, the rest of the calls get stopped by the if statement.

I hope this helps

回答5:

There is no option in Google Visualization API to make Google Charts responsive.

But we can make Google Charts responsive as Window Resizes. To make Google Chart responsive there is jQuery library available at GitHub - jquery-smartresize licensed under MIT License, which has the ability to resize graphs on window resize event.

This project on GitHub has two script files :-

jquery.debouncedresize.js: adds a special event that fires once after the window
has been resized.

&

jquery.throttledresize.js: adds a special event that fires at a reduced rate (no 
more double events from Chrome and Safari).

Here are two examples of responsive charts...

1. Responsive Google Pie Chart
2. Responsive Google Bar Chart

We can change the bottom padding of visualization_wrap to match the desired aspect ratio of chart.

Calculate as Height / Width x 100
For a 16x9 display it would be 9/16 = 0.5625 x 100 = 56.25%
For a square it'd be 100%

We can customize chartarea option of Google Chart to ensure that labels don't get cut off on resizing.

回答6:

Redraw/rescale a Google linechart on window resize:

$(document).ready(function () {
    $(window).resize(function(){
        drawChart();
    });
});

回答7:

I personally prefer the following approach, if You can live with using addEventListener, and don't mind lack of support for IE < 9.

var windowResizeTimer;
window.addEventListener('resize', function(e){
    clearTimeout(windowResizeTimer);
    windowResizeTimer = setTimeout(function(){
        chart.draw(data, options);
    }, 750);
});

Note the use of the setTimeout() and clearTimeout() functions and the added delay of 750 milliseconds, which makes this slightly less intensive when multiple resize events fire in quick succession (which is often the case for browsers on desktop when resizing using a mouse).

回答8:

Using Tiago Castro's answer, I have implemented a line chart to show the demonstration.

google.load('visualization', '1', {
  packages: ['corechart', 'line']
});
google.setOnLoadCallback(drawBackgroundColor);

function drawBackgroundColor() {
  var data = new google.visualization.DataTable();
  data.addColumn('number', 'X');
  data.addColumn('number', 'Compute Time');
  data.addColumn('number', 'Compute Times');
  console.log("--");
  data.addRows([
    [0, 0, 0],
    [10, 10, 15],
    [20, 20, 65]
  ]);
  console.log(data);
  var options = {
    height: 350,
    legend: {
      position: 'bottom'
    },
    hAxis: {
      title: 'Nb Curves'
    },
    vAxis: {
      title: 'Time (ms)'
    },
    backgroundColor: '#f1f8e9'
  };

  function resize() {
    var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
    chart.draw(data, options);
  }
  window.onload = resize();
  window.onresize = resize;

}

<script src='https://www.google.com/jsapi'></script>
<div id="chart_div">