Эта опция не включена в плагин, на который вы ссылаетесь. I t было довольно легко изменить и взломать его в (вот источник измененного плагина):
/**
* Value Labels Plugin for flot.
* http://leonardoeloy.github.com/flot-valuelabels
* http://wiki.github.com/leonardoeloy/flot-valuelabels/
*
* Using canvas.fillText instead of divs, which is better for printing - by Leonardo Eloy, March 2010.
* Tested with Flot 0.6 and JQuery 1.3.2.
*
* Original homepage: http://sites.google.com/site/petrsstuff/projects/flotvallab
* Released under the MIT license by Petr Blahos, December 2009.
*/
(function ($) {
var options = {
valueLabels: {
show: false,
showAsHtml: false, // Set to true if you wanna switch back to DIV usage (you need plot.css for this)
showLastValue: false, // Use this to show the label only for the last value in the series
verticalText: false // should text be written vertically
}
};
function init(plot) {
plot.hooks.draw.push(function (plot, ctx) {
if (!plot.getOptions().valueLabels.show) return;
var showLastValue = plot.getOptions().valueLabels.showLastValue;
var showAsHtml = plot.getOptions().valueLabels.showAsHtml;
var verticalText = plot.getOptions().valueLabels.verticalText;
var ctx = plot.getCanvas().getContext("2d");
$.each(plot.getData(), function(ii, series) {
// Workaround, since Flot doesn't set this value anymore
series.seriesIndex = ii;
if (showAsHtml) plot.getPlaceholder().find("#valueLabels"+ii).remove();
var html = '<div id="valueLabels' + series.seriesIndex + '" class="valueLabels">';
var last_val = null;
var last_x = -1000;
var last_y = -1000;
for (var i = 0; i < series.data.length; ++i) {
if (series.data[i] == null || (showLastValue && i != series.data.length-1)) continue;
var x = series.data[i][0], y = series.data[i][2];
if (x < series.xaxis.min || x > series.xaxis.max || y < series.yaxis.min || y > series.yaxis.max) continue;
var val = y;
if (series.valueLabelFunc) val = series.valueLabelFunc({ series: series, seriesIndex: ii, index: i });
val = ""+val;
if (val!=last_val || i==series.data.length-1) {
var xx = series.xaxis.p2c(x)+plot.getPlotOffset().left;
var yy = series.yaxis.p2c(y)-12+plot.getPlotOffset().top;
if (Math.abs(yy-last_y)>20 || last_x<xx) {
last_val = val;
last_x = xx + val.length*8;
last_y = yy;
if (!showAsHtml) {
// Little 5 px padding here helps the number to get
// closer to points
x_pos = xx;
y_pos = yy+6;
// If the value is on the top of the canvas, we need
// to push it down a little
if (yy <= 0) y_pos = 18;
// The same happens with the x axis
if (xx >= plot.width()) x_pos = plot.width();
// Translate to near the center to rotate about the center
if (verticalText){
ctx.save();
ctx.translate(x_pos,y_pos);
ctx.rotate(Math.PI / 2);
ctx.translate(-x_pos,-y_pos);
}
ctx.fillText(val, x_pos, y_pos);
if (verticalText) ctx.restore();
} else {
var head = '<div style="left:' + xx + 'px;top:' + yy + 'px;" class="valueLabel';
var tail = '">' + val + '</div>';
html+= head + "Light" + tail + head + tail;
}
}
}
}
if (showAsHtml) {
html+= "</div>";
plot.getPlaceholder().append(html);
}
});
});
}
$.plot.plugins.push({
init: init,
options: options,
name: 'valueLabels',
version: '1.1'
});
})(jQuery);
Как это назвать:
var data_a = {
label: "Series A",
data: [[1, 10], [2, 20], [3, 30]]
};
var data_b = {
label: "Series B",
data: [[1, 30], [2, 20], [3, 10]]
};
var options = {
valueLabels: {
show: true,
verticalText: true
}
};
var plot = $.plot($('#placeholder'), [data_a, data_b], options);
Результирующий участок: