How to set hAxis.viewWindow.max for a LineChart when the major axis is typeofday?

Question

I need to draw a chart to show the evolution of data in real time in a day. I've been playing in Google Charts Playground to see how it would be visualized, but I haven't been able to set the hAxis.viewWindow.max option, in order to make the X axis be fixed.

Here is the code I've been using to test:

function drawVisualization() {
  // Create and populate the data table.
  var data = new google.visualization.DataTable();

  data.addColumn('timeofday', 'x');
  data.addColumn('number', 'S0');
  data.addColumn('number', 'S1');
  data.addColumn('number', 'S2');

  data.addRows([
    [[0,0,0,0],   1,       1,           0.5],
    [[1,0,0,0],   2,       0.5,         1],
    [[2,0,0,0],   4,       1,           0.5],
  ]);

  // Create and draw the visualization.
  new google.visualization.LineChart(document.getElementById('visualization')).
      draw(data, {curveType: "function",
                  width: 500, height: 400,
                  vAxis: {maxValue: 10},
                  hAxis: {maxValue: [23,59,59,0], minValue:[0,0,0,0], viewWindow:{max: [23, 59, 59, 0]}}}
          );
    }

The documentation claims that hAxis.viewWindow.max receives numbers, but I haven't found a way to represent the "timeofday" type as a number. ​ Using that, the X axis goes from 0am to 2am, but I needed the axis to go until midnight.

I tried using "datetime" as the column type, with the same problem.

The sample below, using numbers, works the way I intended it to, drawing the line where my points are, but extending the grid until my max value:

function drawVisualization() {
  // Create and populate the data table.
  var data = new google.visualization.DataTable();

  data.addColumn('number', 'x');
  data.addColumn('number', 'S0');
  data.addColumn('number', 'S1');
  data.addColumn('number', 'S2');

  data.addRows([
    [0,   1,       1,           0.5],
    [1,   2,       0.5,         1],
    [2,   4,       1,           0.5],
  ]);

  // Create and draw the visualization.
  new google.visualization.LineChart(document.getElementById('visualization')).
      draw(data, {curveType: "function",
                  width: 500, height: 400,
                  vAxis: {maxValue: 10},
                  hAxis: {maxValue: 23, minValue:0, viewWindow:{max: 23}}}
          );
}

​