mirror of
https://github.com/billz/raspap-webgui.git
synced 2023-10-10 13:37:24 +02:00
821 lines
23 KiB
JavaScript
Executable File
821 lines
23 KiB
JavaScript
Executable File
/* Flot plugin for rendering pie charts.
|
|
|
|
Copyright (c) 2007-2014 IOLA and Ole Laursen.
|
|
Licensed under the MIT license.
|
|
|
|
The plugin assumes that each series has a single data value, and that each
|
|
value is a positive integer or zero. Negative numbers don't make sense for a
|
|
pie chart, and have unpredictable results. The values do NOT need to be
|
|
passed in as percentages; the plugin will calculate the total and per-slice
|
|
percentages internally.
|
|
|
|
* Created by Brian Medendorp
|
|
|
|
* Updated with contributions from btburnett3, Anthony Aragues and Xavi Ivars
|
|
|
|
The plugin supports these options:
|
|
|
|
series: {
|
|
pie: {
|
|
show: true/false
|
|
radius: 0-1 for percentage of fullsize, or a specified pixel length, or 'auto'
|
|
innerRadius: 0-1 for percentage of fullsize or a specified pixel length, for creating a donut effect
|
|
startAngle: 0-2 factor of PI used for starting angle (in radians) i.e 3/2 starts at the top, 0 and 2 have the same result
|
|
tilt: 0-1 for percentage to tilt the pie, where 1 is no tilt, and 0 is completely flat (nothing will show)
|
|
offset: {
|
|
top: integer value to move the pie up or down
|
|
left: integer value to move the pie left or right, or 'auto'
|
|
},
|
|
stroke: {
|
|
color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#FFF')
|
|
width: integer pixel width of the stroke
|
|
},
|
|
label: {
|
|
show: true/false, or 'auto'
|
|
formatter: a user-defined function that modifies the text/style of the label text
|
|
radius: 0-1 for percentage of fullsize, or a specified pixel length
|
|
background: {
|
|
color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#000')
|
|
opacity: 0-1
|
|
},
|
|
threshold: 0-1 for the percentage value at which to hide labels (if they're too small)
|
|
},
|
|
combine: {
|
|
threshold: 0-1 for the percentage value at which to combine slices (if they're too small)
|
|
color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#CCC'), if null, the plugin will automatically use the color of the first slice to be combined
|
|
label: any text value of what the combined slice should be labeled
|
|
}
|
|
highlight: {
|
|
opacity: 0-1
|
|
}
|
|
}
|
|
}
|
|
|
|
More detail and specific examples can be found in the included HTML file.
|
|
|
|
*/
|
|
|
|
(function($) {
|
|
|
|
// Maximum redraw attempts when fitting labels within the plot
|
|
|
|
var REDRAW_ATTEMPTS = 10;
|
|
|
|
// Factor by which to shrink the pie when fitting labels within the plot
|
|
|
|
var REDRAW_SHRINK = 0.95;
|
|
|
|
function init(plot) {
|
|
|
|
var canvas = null,
|
|
target = null,
|
|
options = null,
|
|
maxRadius = null,
|
|
centerLeft = null,
|
|
centerTop = null,
|
|
processed = false,
|
|
ctx = null;
|
|
|
|
// interactive variables
|
|
|
|
var highlights = [];
|
|
|
|
// add hook to determine if pie plugin in enabled, and then perform necessary operations
|
|
|
|
plot.hooks.processOptions.push(function(plot, options) {
|
|
if (options.series.pie.show) {
|
|
|
|
options.grid.show = false;
|
|
|
|
// set labels.show
|
|
|
|
if (options.series.pie.label.show == "auto") {
|
|
if (options.legend.show) {
|
|
options.series.pie.label.show = false;
|
|
} else {
|
|
options.series.pie.label.show = true;
|
|
}
|
|
}
|
|
|
|
// set radius
|
|
|
|
if (options.series.pie.radius == "auto") {
|
|
if (options.series.pie.label.show) {
|
|
options.series.pie.radius = 3/4;
|
|
} else {
|
|
options.series.pie.radius = 1;
|
|
}
|
|
}
|
|
|
|
// ensure sane tilt
|
|
|
|
if (options.series.pie.tilt > 1) {
|
|
options.series.pie.tilt = 1;
|
|
} else if (options.series.pie.tilt < 0) {
|
|
options.series.pie.tilt = 0;
|
|
}
|
|
}
|
|
});
|
|
|
|
plot.hooks.bindEvents.push(function(plot, eventHolder) {
|
|
var options = plot.getOptions();
|
|
if (options.series.pie.show) {
|
|
if (options.grid.hoverable) {
|
|
eventHolder.unbind("mousemove").mousemove(onMouseMove);
|
|
}
|
|
if (options.grid.clickable) {
|
|
eventHolder.unbind("click").click(onClick);
|
|
}
|
|
}
|
|
});
|
|
|
|
plot.hooks.processDatapoints.push(function(plot, series, data, datapoints) {
|
|
var options = plot.getOptions();
|
|
if (options.series.pie.show) {
|
|
processDatapoints(plot, series, data, datapoints);
|
|
}
|
|
});
|
|
|
|
plot.hooks.drawOverlay.push(function(plot, octx) {
|
|
var options = plot.getOptions();
|
|
if (options.series.pie.show) {
|
|
drawOverlay(plot, octx);
|
|
}
|
|
});
|
|
|
|
plot.hooks.draw.push(function(plot, newCtx) {
|
|
var options = plot.getOptions();
|
|
if (options.series.pie.show) {
|
|
draw(plot, newCtx);
|
|
}
|
|
});
|
|
|
|
function processDatapoints(plot, series, datapoints) {
|
|
if (!processed) {
|
|
processed = true;
|
|
canvas = plot.getCanvas();
|
|
target = $(canvas).parent();
|
|
options = plot.getOptions();
|
|
plot.setData(combine(plot.getData()));
|
|
}
|
|
}
|
|
|
|
function combine(data) {
|
|
|
|
var total = 0,
|
|
combined = 0,
|
|
numCombined = 0,
|
|
color = options.series.pie.combine.color,
|
|
newdata = [];
|
|
|
|
// Fix up the raw data from Flot, ensuring the data is numeric
|
|
|
|
for (var i = 0; i < data.length; ++i) {
|
|
|
|
var value = data[i].data;
|
|
|
|
// If the data is an array, we'll assume that it's a standard
|
|
// Flot x-y pair, and are concerned only with the second value.
|
|
|
|
// Note how we use the original array, rather than creating a
|
|
// new one; this is more efficient and preserves any extra data
|
|
// that the user may have stored in higher indexes.
|
|
|
|
if ($.isArray(value) && value.length == 1) {
|
|
value = value[0];
|
|
}
|
|
|
|
if ($.isArray(value)) {
|
|
// Equivalent to $.isNumeric() but compatible with jQuery < 1.7
|
|
if (!isNaN(parseFloat(value[1])) && isFinite(value[1])) {
|
|
value[1] = +value[1];
|
|
} else {
|
|
value[1] = 0;
|
|
}
|
|
} else if (!isNaN(parseFloat(value)) && isFinite(value)) {
|
|
value = [1, +value];
|
|
} else {
|
|
value = [1, 0];
|
|
}
|
|
|
|
data[i].data = [value];
|
|
}
|
|
|
|
// Sum up all the slices, so we can calculate percentages for each
|
|
|
|
for (var i = 0; i < data.length; ++i) {
|
|
total += data[i].data[0][1];
|
|
}
|
|
|
|
// Count the number of slices with percentages below the combine
|
|
// threshold; if it turns out to be just one, we won't combine.
|
|
|
|
for (var i = 0; i < data.length; ++i) {
|
|
var value = data[i].data[0][1];
|
|
if (value / total <= options.series.pie.combine.threshold) {
|
|
combined += value;
|
|
numCombined++;
|
|
if (!color) {
|
|
color = data[i].color;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (var i = 0; i < data.length; ++i) {
|
|
var value = data[i].data[0][1];
|
|
if (numCombined < 2 || value / total > options.series.pie.combine.threshold) {
|
|
newdata.push(
|
|
$.extend(data[i], { /* extend to allow keeping all other original data values
|
|
and using them e.g. in labelFormatter. */
|
|
data: [[1, value]],
|
|
color: data[i].color,
|
|
label: data[i].label,
|
|
angle: value * Math.PI * 2 / total,
|
|
percent: value / (total / 100)
|
|
})
|
|
);
|
|
}
|
|
}
|
|
|
|
if (numCombined > 1) {
|
|
newdata.push({
|
|
data: [[1, combined]],
|
|
color: color,
|
|
label: options.series.pie.combine.label,
|
|
angle: combined * Math.PI * 2 / total,
|
|
percent: combined / (total / 100)
|
|
});
|
|
}
|
|
|
|
return newdata;
|
|
}
|
|
|
|
function draw(plot, newCtx) {
|
|
|
|
if (!target) {
|
|
return; // if no series were passed
|
|
}
|
|
|
|
var canvasWidth = plot.getPlaceholder().width(),
|
|
canvasHeight = plot.getPlaceholder().height(),
|
|
legendWidth = target.children().filter(".legend").children().width() || 0;
|
|
|
|
ctx = newCtx;
|
|
|
|
// WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE!
|
|
|
|
// When combining smaller slices into an 'other' slice, we need to
|
|
// add a new series. Since Flot gives plugins no way to modify the
|
|
// list of series, the pie plugin uses a hack where the first call
|
|
// to processDatapoints results in a call to setData with the new
|
|
// list of series, then subsequent processDatapoints do nothing.
|
|
|
|
// The plugin-global 'processed' flag is used to control this hack;
|
|
// it starts out false, and is set to true after the first call to
|
|
// processDatapoints.
|
|
|
|
// Unfortunately this turns future setData calls into no-ops; they
|
|
// call processDatapoints, the flag is true, and nothing happens.
|
|
|
|
// To fix this we'll set the flag back to false here in draw, when
|
|
// all series have been processed, so the next sequence of calls to
|
|
// processDatapoints once again starts out with a slice-combine.
|
|
// This is really a hack; in 0.9 we need to give plugins a proper
|
|
// way to modify series before any processing begins.
|
|
|
|
processed = false;
|
|
|
|
// calculate maximum radius and center point
|
|
|
|
maxRadius = Math.min(canvasWidth, canvasHeight / options.series.pie.tilt) / 2;
|
|
centerTop = canvasHeight / 2 + options.series.pie.offset.top;
|
|
centerLeft = canvasWidth / 2;
|
|
|
|
if (options.series.pie.offset.left == "auto") {
|
|
if (options.legend.position.match("w")) {
|
|
centerLeft += legendWidth / 2;
|
|
} else {
|
|
centerLeft -= legendWidth / 2;
|
|
}
|
|
if (centerLeft < maxRadius) {
|
|
centerLeft = maxRadius;
|
|
} else if (centerLeft > canvasWidth - maxRadius) {
|
|
centerLeft = canvasWidth - maxRadius;
|
|
}
|
|
} else {
|
|
centerLeft += options.series.pie.offset.left;
|
|
}
|
|
|
|
var slices = plot.getData(),
|
|
attempts = 0;
|
|
|
|
// Keep shrinking the pie's radius until drawPie returns true,
|
|
// indicating that all the labels fit, or we try too many times.
|
|
|
|
do {
|
|
if (attempts > 0) {
|
|
maxRadius *= REDRAW_SHRINK;
|
|
}
|
|
attempts += 1;
|
|
clear();
|
|
if (options.series.pie.tilt <= 0.8) {
|
|
drawShadow();
|
|
}
|
|
} while (!drawPie() && attempts < REDRAW_ATTEMPTS)
|
|
|
|
if (attempts >= REDRAW_ATTEMPTS) {
|
|
clear();
|
|
target.prepend("<div class='error'>Could not draw pie with labels contained inside canvas</div>");
|
|
}
|
|
|
|
if (plot.setSeries && plot.insertLegend) {
|
|
plot.setSeries(slices);
|
|
plot.insertLegend();
|
|
}
|
|
|
|
// we're actually done at this point, just defining internal functions at this point
|
|
|
|
function clear() {
|
|
ctx.clearRect(0, 0, canvasWidth, canvasHeight);
|
|
target.children().filter(".pieLabel, .pieLabelBackground").remove();
|
|
}
|
|
|
|
function drawShadow() {
|
|
|
|
var shadowLeft = options.series.pie.shadow.left;
|
|
var shadowTop = options.series.pie.shadow.top;
|
|
var edge = 10;
|
|
var alpha = options.series.pie.shadow.alpha;
|
|
var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
|
|
|
|
if (radius >= canvasWidth / 2 - shadowLeft || radius * options.series.pie.tilt >= canvasHeight / 2 - shadowTop || radius <= edge) {
|
|
return; // shadow would be outside canvas, so don't draw it
|
|
}
|
|
|
|
ctx.save();
|
|
ctx.translate(shadowLeft,shadowTop);
|
|
ctx.globalAlpha = alpha;
|
|
ctx.fillStyle = "#000";
|
|
|
|
// center and rotate to starting position
|
|
|
|
ctx.translate(centerLeft,centerTop);
|
|
ctx.scale(1, options.series.pie.tilt);
|
|
|
|
//radius -= edge;
|
|
|
|
for (var i = 1; i <= edge; i++) {
|
|
ctx.beginPath();
|
|
ctx.arc(0, 0, radius, 0, Math.PI * 2, false);
|
|
ctx.fill();
|
|
radius -= i;
|
|
}
|
|
|
|
ctx.restore();
|
|
}
|
|
|
|
function drawPie() {
|
|
|
|
var startAngle = Math.PI * options.series.pie.startAngle;
|
|
var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
|
|
|
|
// center and rotate to starting position
|
|
|
|
ctx.save();
|
|
ctx.translate(centerLeft,centerTop);
|
|
ctx.scale(1, options.series.pie.tilt);
|
|
//ctx.rotate(startAngle); // start at top; -- This doesn't work properly in Opera
|
|
|
|
// draw slices
|
|
|
|
ctx.save();
|
|
var currentAngle = startAngle;
|
|
for (var i = 0; i < slices.length; ++i) {
|
|
slices[i].startAngle = currentAngle;
|
|
drawSlice(slices[i].angle, slices[i].color, true);
|
|
}
|
|
ctx.restore();
|
|
|
|
// draw slice outlines
|
|
|
|
if (options.series.pie.stroke.width > 0) {
|
|
ctx.save();
|
|
ctx.lineWidth = options.series.pie.stroke.width;
|
|
currentAngle = startAngle;
|
|
for (var i = 0; i < slices.length; ++i) {
|
|
drawSlice(slices[i].angle, options.series.pie.stroke.color, false);
|
|
}
|
|
ctx.restore();
|
|
}
|
|
|
|
// draw donut hole
|
|
|
|
drawDonutHole(ctx);
|
|
|
|
ctx.restore();
|
|
|
|
// Draw the labels, returning true if they fit within the plot
|
|
|
|
if (options.series.pie.label.show) {
|
|
return drawLabels();
|
|
} else return true;
|
|
|
|
function drawSlice(angle, color, fill) {
|
|
|
|
if (angle <= 0 || isNaN(angle)) {
|
|
return;
|
|
}
|
|
|
|
if (fill) {
|
|
ctx.fillStyle = color;
|
|
} else {
|
|
ctx.strokeStyle = color;
|
|
ctx.lineJoin = "round";
|
|
}
|
|
|
|
ctx.beginPath();
|
|
if (Math.abs(angle - Math.PI * 2) > 0.000000001) {
|
|
ctx.moveTo(0, 0); // Center of the pie
|
|
}
|
|
|
|
//ctx.arc(0, 0, radius, 0, angle, false); // This doesn't work properly in Opera
|
|
ctx.arc(0, 0, radius,currentAngle, currentAngle + angle / 2, false);
|
|
ctx.arc(0, 0, radius,currentAngle + angle / 2, currentAngle + angle, false);
|
|
ctx.closePath();
|
|
//ctx.rotate(angle); // This doesn't work properly in Opera
|
|
currentAngle += angle;
|
|
|
|
if (fill) {
|
|
ctx.fill();
|
|
} else {
|
|
ctx.stroke();
|
|
}
|
|
}
|
|
|
|
function drawLabels() {
|
|
|
|
var currentAngle = startAngle;
|
|
var radius = options.series.pie.label.radius > 1 ? options.series.pie.label.radius : maxRadius * options.series.pie.label.radius;
|
|
|
|
for (var i = 0; i < slices.length; ++i) {
|
|
if (slices[i].percent >= options.series.pie.label.threshold * 100) {
|
|
if (!drawLabel(slices[i], currentAngle, i)) {
|
|
return false;
|
|
}
|
|
}
|
|
currentAngle += slices[i].angle;
|
|
}
|
|
|
|
return true;
|
|
|
|
function drawLabel(slice, startAngle, index) {
|
|
|
|
if (slice.data[0][1] == 0) {
|
|
return true;
|
|
}
|
|
|
|
// format label text
|
|
|
|
var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter;
|
|
|
|
if (lf) {
|
|
text = lf(slice.label, slice);
|
|
} else {
|
|
text = slice.label;
|
|
}
|
|
|
|
if (plf) {
|
|
text = plf(text, slice);
|
|
}
|
|
|
|
var halfAngle = ((startAngle + slice.angle) + startAngle) / 2;
|
|
var x = centerLeft + Math.round(Math.cos(halfAngle) * radius);
|
|
var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt;
|
|
|
|
var html = "<span class='pieLabel' id='pieLabel" + index + "' style='position:absolute;top:" + y + "px;left:" + x + "px;'>" + text + "</span>";
|
|
target.append(html);
|
|
|
|
var label = target.children("#pieLabel" + index);
|
|
var labelTop = (y - label.height() / 2);
|
|
var labelLeft = (x - label.width() / 2);
|
|
|
|
label.css("top", labelTop);
|
|
label.css("left", labelLeft);
|
|
|
|
// check to make sure that the label is not outside the canvas
|
|
|
|
if (0 - labelTop > 0 || 0 - labelLeft > 0 || canvasHeight - (labelTop + label.height()) < 0 || canvasWidth - (labelLeft + label.width()) < 0) {
|
|
return false;
|
|
}
|
|
|
|
if (options.series.pie.label.background.opacity != 0) {
|
|
|
|
// put in the transparent background separately to avoid blended labels and label boxes
|
|
|
|
var c = options.series.pie.label.background.color;
|
|
|
|
if (c == null) {
|
|
c = slice.color;
|
|
}
|
|
|
|
var pos = "top:" + labelTop + "px;left:" + labelLeft + "px;";
|
|
$("<div class='pieLabelBackground' style='position:absolute;width:" + label.width() + "px;height:" + label.height() + "px;" + pos + "background-color:" + c + ";'></div>")
|
|
.css("opacity", options.series.pie.label.background.opacity)
|
|
.insertBefore(label);
|
|
}
|
|
|
|
return true;
|
|
} // end individual label function
|
|
} // end drawLabels function
|
|
} // end drawPie function
|
|
} // end draw function
|
|
|
|
// Placed here because it needs to be accessed from multiple locations
|
|
|
|
function drawDonutHole(layer) {
|
|
if (options.series.pie.innerRadius > 0) {
|
|
|
|
// subtract the center
|
|
|
|
layer.save();
|
|
var innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius;
|
|
layer.globalCompositeOperation = "destination-out"; // this does not work with excanvas, but it will fall back to using the stroke color
|
|
layer.beginPath();
|
|
layer.fillStyle = options.series.pie.stroke.color;
|
|
layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
|
|
layer.fill();
|
|
layer.closePath();
|
|
layer.restore();
|
|
|
|
// add inner stroke
|
|
|
|
layer.save();
|
|
layer.beginPath();
|
|
layer.strokeStyle = options.series.pie.stroke.color;
|
|
layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
|
|
layer.stroke();
|
|
layer.closePath();
|
|
layer.restore();
|
|
|
|
// TODO: add extra shadow inside hole (with a mask) if the pie is tilted.
|
|
}
|
|
}
|
|
|
|
//-- Additional Interactive related functions --
|
|
|
|
function isPointInPoly(poly, pt) {
|
|
for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i)
|
|
((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) || (poly[j][1] <= pt[1] && pt[1]< poly[i][1]))
|
|
&& (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0])
|
|
&& (c = !c);
|
|
return c;
|
|
}
|
|
|
|
function findNearbySlice(mouseX, mouseY) {
|
|
|
|
var slices = plot.getData(),
|
|
options = plot.getOptions(),
|
|
radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius,
|
|
x, y;
|
|
|
|
for (var i = 0; i < slices.length; ++i) {
|
|
|
|
var s = slices[i];
|
|
|
|
if (s.pie.show) {
|
|
|
|
ctx.save();
|
|
ctx.beginPath();
|
|
ctx.moveTo(0, 0); // Center of the pie
|
|
//ctx.scale(1, options.series.pie.tilt); // this actually seems to break everything when here.
|
|
ctx.arc(0, 0, radius, s.startAngle, s.startAngle + s.angle / 2, false);
|
|
ctx.arc(0, 0, radius, s.startAngle + s.angle / 2, s.startAngle + s.angle, false);
|
|
ctx.closePath();
|
|
x = mouseX - centerLeft;
|
|
y = mouseY - centerTop;
|
|
|
|
if (ctx.isPointInPath) {
|
|
if (ctx.isPointInPath(mouseX - centerLeft, mouseY - centerTop)) {
|
|
ctx.restore();
|
|
return {
|
|
datapoint: [s.percent, s.data],
|
|
dataIndex: 0,
|
|
series: s,
|
|
seriesIndex: i
|
|
};
|
|
}
|
|
} else {
|
|
|
|
// excanvas for IE doesn;t support isPointInPath, this is a workaround.
|
|
|
|
var p1X = radius * Math.cos(s.startAngle),
|
|
p1Y = radius * Math.sin(s.startAngle),
|
|
p2X = radius * Math.cos(s.startAngle + s.angle / 4),
|
|
p2Y = radius * Math.sin(s.startAngle + s.angle / 4),
|
|
p3X = radius * Math.cos(s.startAngle + s.angle / 2),
|
|
p3Y = radius * Math.sin(s.startAngle + s.angle / 2),
|
|
p4X = radius * Math.cos(s.startAngle + s.angle / 1.5),
|
|
p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5),
|
|
p5X = radius * Math.cos(s.startAngle + s.angle),
|
|
p5Y = radius * Math.sin(s.startAngle + s.angle),
|
|
arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]],
|
|
arrPoint = [x, y];
|
|
|
|
// TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt?
|
|
|
|
if (isPointInPoly(arrPoly, arrPoint)) {
|
|
ctx.restore();
|
|
return {
|
|
datapoint: [s.percent, s.data],
|
|
dataIndex: 0,
|
|
series: s,
|
|
seriesIndex: i
|
|
};
|
|
}
|
|
}
|
|
|
|
ctx.restore();
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
function onMouseMove(e) {
|
|
triggerClickHoverEvent("plothover", e);
|
|
}
|
|
|
|
function onClick(e) {
|
|
triggerClickHoverEvent("plotclick", e);
|
|
}
|
|
|
|
// trigger click or hover event (they send the same parameters so we share their code)
|
|
|
|
function triggerClickHoverEvent(eventname, e) {
|
|
|
|
var offset = plot.offset();
|
|
var canvasX = parseInt(e.pageX - offset.left);
|
|
var canvasY = parseInt(e.pageY - offset.top);
|
|
var item = findNearbySlice(canvasX, canvasY);
|
|
|
|
if (options.grid.autoHighlight) {
|
|
|
|
// clear auto-highlights
|
|
|
|
for (var i = 0; i < highlights.length; ++i) {
|
|
var h = highlights[i];
|
|
if (h.auto == eventname && !(item && h.series == item.series)) {
|
|
unhighlight(h.series);
|
|
}
|
|
}
|
|
}
|
|
|
|
// highlight the slice
|
|
|
|
if (item) {
|
|
highlight(item.series, eventname);
|
|
}
|
|
|
|
// trigger any hover bind events
|
|
|
|
var pos = { pageX: e.pageX, pageY: e.pageY };
|
|
target.trigger(eventname, [pos, item]);
|
|
}
|
|
|
|
function highlight(s, auto) {
|
|
//if (typeof s == "number") {
|
|
// s = series[s];
|
|
//}
|
|
|
|
var i = indexOfHighlight(s);
|
|
|
|
if (i == -1) {
|
|
highlights.push({ series: s, auto: auto });
|
|
plot.triggerRedrawOverlay();
|
|
} else if (!auto) {
|
|
highlights[i].auto = false;
|
|
}
|
|
}
|
|
|
|
function unhighlight(s) {
|
|
if (s == null) {
|
|
highlights = [];
|
|
plot.triggerRedrawOverlay();
|
|
}
|
|
|
|
//if (typeof s == "number") {
|
|
// s = series[s];
|
|
//}
|
|
|
|
var i = indexOfHighlight(s);
|
|
|
|
if (i != -1) {
|
|
highlights.splice(i, 1);
|
|
plot.triggerRedrawOverlay();
|
|
}
|
|
}
|
|
|
|
function indexOfHighlight(s) {
|
|
for (var i = 0; i < highlights.length; ++i) {
|
|
var h = highlights[i];
|
|
if (h.series == s)
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
function drawOverlay(plot, octx) {
|
|
|
|
var options = plot.getOptions();
|
|
|
|
var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
|
|
|
|
octx.save();
|
|
octx.translate(centerLeft, centerTop);
|
|
octx.scale(1, options.series.pie.tilt);
|
|
|
|
for (var i = 0; i < highlights.length; ++i) {
|
|
drawHighlight(highlights[i].series);
|
|
}
|
|
|
|
drawDonutHole(octx);
|
|
|
|
octx.restore();
|
|
|
|
function drawHighlight(series) {
|
|
|
|
if (series.angle <= 0 || isNaN(series.angle)) {
|
|
return;
|
|
}
|
|
|
|
//octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString();
|
|
octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor
|
|
octx.beginPath();
|
|
if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) {
|
|
octx.moveTo(0, 0); // Center of the pie
|
|
}
|
|
octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false);
|
|
octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false);
|
|
octx.closePath();
|
|
octx.fill();
|
|
}
|
|
}
|
|
} // end init (plugin body)
|
|
|
|
// define pie specific options and their default values
|
|
|
|
var options = {
|
|
series: {
|
|
pie: {
|
|
show: false,
|
|
radius: "auto", // actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value)
|
|
innerRadius: 0, /* for donut */
|
|
startAngle: 3/2,
|
|
tilt: 1,
|
|
shadow: {
|
|
left: 5, // shadow left offset
|
|
top: 15, // shadow top offset
|
|
alpha: 0.02 // shadow alpha
|
|
},
|
|
offset: {
|
|
top: 0,
|
|
left: "auto"
|
|
},
|
|
stroke: {
|
|
color: "#fff",
|
|
width: 1
|
|
},
|
|
label: {
|
|
show: "auto",
|
|
formatter: function(label, slice) {
|
|
return "<div style='font-size:x-small;text-align:center;padding:2px;color:" + slice.color + ";'>" + label + "<br/>" + Math.round(slice.percent) + "%</div>";
|
|
}, // formatter function
|
|
radius: 1, // radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value)
|
|
background: {
|
|
color: null,
|
|
opacity: 0
|
|
},
|
|
threshold: 0 // percentage at which to hide the label (i.e. the slice is too narrow)
|
|
},
|
|
combine: {
|
|
threshold: -1, // percentage at which to combine little slices into one larger slice
|
|
color: null, // color to give the new slice (auto-generated if null)
|
|
label: "Other" // label to give the new slice
|
|
},
|
|
highlight: {
|
|
//color: "#fff", // will add this functionality once parseColor is available
|
|
opacity: 0.5
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
$.plot.plugins.push({
|
|
init: init,
|
|
options: options,
|
|
name: "pie",
|
|
version: "1.1"
|
|
});
|
|
|
|
})(jQuery);
|