I am not a Javascript ninja so this might be a lack of knowledge but
that about the 'prototype' objects used in
http://code.google.com/apis/visualization/documentation/dev/index.html
?
Every class-method has a prototype in its name. What does it do? Can I
omit it?
// Declare a unique namespace.
var example = {};
// Class constructor. Parameter container is a DOM elementon the
client that
// that will contain the visualization.
example.MyTable = function(container) {
this.containerElement = container;
}
// Main drawing logic.
// Parameters:
// data is data to display, type google.visualization.DataTable.
// options is a name/value map of options. Our example takes one
option.
example.MyTable.prototype.draw = function(data, options) {
// Create an HTML table
var showLineNumber = options.showLineNumber; // Boolean
configuration option.
var html = [];
html.push('<table border="1">');
// Header row
html.push('<tr>');
if (showLineNumber) {
html.push('<th>Seq</th>');
}
for (var col = 0; col < data.getNumberOfColumns(); col++) {
html.push('<th>' + this.escapeHtml(data.getColumnLabel(col)) + '</
th>');
}
html.push('</tr>');
for (var row = 0; row < data.getNumberOfRows(); row++) {
html.push('<tr>');
if (showLineNumber) {
html.push('<td align="right">', (row + 1), '</td>');
}
for (var col = 0; col < data.getNumberOfColumns(); col++) {
html.push(data.getColumnType(col) == 'number' ? '<td
align="right">' : '<td>');
html.push(this.escapeHtml(data.getFormattedValue(row, col)));
html.push('</td>');
}
html.push('</tr>');
}
html.push('</table>');
this.containerElement.innerHTML = html.join('');
}
// Utility function to escape HTML special characters
example.MyTable.prototype.escapeHtml = function(text) {
if (text == null)
return '';
return text.replace(/&/g, '&').replace(/</g, '<')
.replace(/>/g, '>').replace(/"/g, '"');
}
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