' + l + '
');
- }
-
- if (labels.length > 0) {
- var dummyDiv = $(''
- + labels.join("") + '
').appendTo(placeholder);
- axis.labelHeight = dummyDiv.height();
- dummyDiv.remove();
- }
- }
- }
- else if (axis.labelWidth == null || axis.labelHeight == null) {
- // calculate y label dimensions
- for (i = 0; i < axis.ticks.length; ++i) {
- l = axis.ticks[i].label;
- if (l)
- labels.push('' + l + '
');
- }
-
- if (labels.length > 0) {
- var dummyDiv = $(''
- + labels.join("") + '
').appendTo(placeholder);
- if (axis.labelWidth == null)
- axis.labelWidth = dummyDiv.width();
- if (axis.labelHeight == null)
- axis.labelHeight = dummyDiv.find("div").height();
- dummyDiv.remove();
- }
-
- }
-
- if (axis.labelWidth == null)
- axis.labelWidth = 0;
- if (axis.labelHeight == null)
- axis.labelHeight = 0;
- }
-
- function setGridSpacing() {
- // get the most space needed around the grid for things
- // that may stick out
- var maxOutset = options.grid.borderWidth;
- for (i = 0; i < series.length; ++i)
- maxOutset = Math.max(maxOutset, 2 * (series[i].points.radius + series[i].points.lineWidth/2));
-
- plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = maxOutset;
-
- var margin = options.grid.labelMargin + options.grid.borderWidth;
-
- if (axes.xaxis.labelHeight > 0)
- plotOffset.bottom = Math.max(maxOutset, axes.xaxis.labelHeight + margin);
- if (axes.yaxis.labelWidth > 0)
- plotOffset.left = Math.max(maxOutset, axes.yaxis.labelWidth + margin);
- if (axes.x2axis.labelHeight > 0)
- plotOffset.top = Math.max(maxOutset, axes.x2axis.labelHeight + margin);
- if (axes.y2axis.labelWidth > 0)
- plotOffset.right = Math.max(maxOutset, axes.y2axis.labelWidth + margin);
-
- plotWidth = canvasWidth - plotOffset.left - plotOffset.right;
- plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top;
- }
-
- var axis;
- for (axis in axes)
- setRange(axes[axis], options[axis]);
-
- if (options.grid.show) {
- for (axis in axes) {
- prepareTickGeneration(axes[axis], options[axis]);
- setTicks(axes[axis], options[axis]);
- measureLabels(axes[axis], options[axis]);
- }
-
- setGridSpacing();
- }
- else {
- plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = 0;
- plotWidth = canvasWidth;
- plotHeight = canvasHeight;
- }
-
- for (axis in axes)
- setTransformationHelpers(axes[axis], options[axis]);
-
- if (options.grid.show)
- insertLabels();
-
- insertLegend();
- }
-
- function setRange(axis, axisOptions) {
- var min = +(axisOptions.min != null ? axisOptions.min : axis.datamin),
- max = +(axisOptions.max != null ? axisOptions.max : axis.datamax),
- delta = max - min;
-
- if (delta == 0.0) {
- // degenerate case
- var widen = max == 0 ? 1 : 0.01;
-
- if (axisOptions.min == null)
- min -= widen;
- // alway widen max if we couldn't widen min to ensure we
- // don't fall into min == max which doesn't work
- if (axisOptions.max == null || axisOptions.min != null)
- max += widen;
- }
- else {
- // consider autoscaling
- var margin = axisOptions.autoscaleMargin;
- if (margin != null) {
- if (axisOptions.min == null) {
- min -= delta * margin;
- // make sure we don't go below zero if all values
- // are positive
- if (min < 0 && axis.datamin != null && axis.datamin >= 0)
- min = 0;
- }
- if (axisOptions.max == null) {
- max += delta * margin;
- if (max > 0 && axis.datamax != null && axis.datamax <= 0)
- max = 0;
- }
- }
- }
- axis.min = min;
- axis.max = max;
- }
-
- function prepareTickGeneration(axis, axisOptions) {
- // estimate number of ticks
- var noTicks;
- if (typeof axisOptions.ticks == "number" && axisOptions.ticks > 0)
- noTicks = axisOptions.ticks;
- else if (axis == axes.xaxis || axis == axes.x2axis)
- // heuristic based on the model a*sqrt(x) fitted to
- // some reasonable data points
- noTicks = 0.3 * Math.sqrt(canvasWidth);
- else
- noTicks = 0.3 * Math.sqrt(canvasHeight);
-
- var delta = (axis.max - axis.min) / noTicks,
- size, generator, unit, formatter, i, magn, norm;
-
- if (axisOptions.mode == "time") {
- // pretty handling of time
-
- // map of app. size of time units in milliseconds
- var timeUnitSize = {
- "second": 1000,
- "minute": 60 * 1000,
- "hour": 60 * 60 * 1000,
- "day": 24 * 60 * 60 * 1000,
- "month": 30 * 24 * 60 * 60 * 1000,
- "year": 365.2425 * 24 * 60 * 60 * 1000
- };
-
-
- // the allowed tick sizes, after 1 year we use
- // an integer algorithm
- var spec = [
- [1, "second"], [2, "second"], [5, "second"], [10, "second"],
- [30, "second"],
- [1, "minute"], [2, "minute"], [5, "minute"], [10, "minute"],
- [30, "minute"],
- [1, "hour"], [2, "hour"], [4, "hour"],
- [8, "hour"], [12, "hour"],
- [1, "day"], [2, "day"], [3, "day"],
- [0.25, "month"], [0.5, "month"], [1, "month"],
- [2, "month"], [3, "month"], [6, "month"],
- [1, "year"]
- ];
-
- var minSize = 0;
- if (axisOptions.minTickSize != null) {
- if (typeof axisOptions.tickSize == "number")
- minSize = axisOptions.tickSize;
- else
- minSize = axisOptions.minTickSize[0] * timeUnitSize[axisOptions.minTickSize[1]];
- }
-
- for (i = 0; i < spec.length - 1; ++i)
- if (delta < (spec[i][0] * timeUnitSize[spec[i][1]]
- + spec[i + 1][0] * timeUnitSize[spec[i + 1][1]]) / 2
- && spec[i][0] * timeUnitSize[spec[i][1]] >= minSize)
- break;
- size = spec[i][0];
- unit = spec[i][1];
-
- // special-case the possibility of several years
- if (unit == "year") {
- magn = Math.pow(10, Math.floor(Math.log(delta / timeUnitSize.year) / Math.LN10));
- norm = (delta / timeUnitSize.year) / magn;
- if (norm < 1.5)
- size = 1;
- else if (norm < 3)
- size = 2;
- else if (norm < 7.5)
- size = 5;
- else
- size = 10;
-
- size *= magn;
- }
-
- if (axisOptions.tickSize) {
- size = axisOptions.tickSize[0];
- unit = axisOptions.tickSize[1];
- }
-
- generator = function(axis) {
- var ticks = [],
- tickSize = axis.tickSize[0], unit = axis.tickSize[1],
- d = new Date(axis.min);
-
- var step = tickSize * timeUnitSize[unit];
-
- if (unit == "second")
- d.setUTCSeconds(floorInBase(d.getUTCSeconds(), tickSize));
- if (unit == "minute")
- d.setUTCMinutes(floorInBase(d.getUTCMinutes(), tickSize));
- if (unit == "hour")
- d.setUTCHours(floorInBase(d.getUTCHours(), tickSize));
- if (unit == "month")
- d.setUTCMonth(floorInBase(d.getUTCMonth(), tickSize));
- if (unit == "year")
- d.setUTCFullYear(floorInBase(d.getUTCFullYear(), tickSize));
-
- // reset smaller components
- d.setUTCMilliseconds(0);
- if (step >= timeUnitSize.minute)
- d.setUTCSeconds(0);
- if (step >= timeUnitSize.hour)
- d.setUTCMinutes(0);
- if (step >= timeUnitSize.day)
- d.setUTCHours(0);
- if (step >= timeUnitSize.day * 4)
- d.setUTCDate(1);
- if (step >= timeUnitSize.year)
- d.setUTCMonth(0);
-
-
- var carry = 0, v = Number.NaN, prev;
- do {
- prev = v;
- v = d.getTime();
- ticks.push({ v: v, label: axis.tickFormatter(v, axis) });
- if (unit == "month") {
- if (tickSize < 1) {
- // a bit complicated - we'll divide the month
- // up but we need to take care of fractions
- // so we don't end up in the middle of a day
- d.setUTCDate(1);
- var start = d.getTime();
- d.setUTCMonth(d.getUTCMonth() + 1);
- var end = d.getTime();
- d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);
- carry = d.getUTCHours();
- d.setUTCHours(0);
- }
- else
- d.setUTCMonth(d.getUTCMonth() + tickSize);
- }
- else if (unit == "year") {
- d.setUTCFullYear(d.getUTCFullYear() + tickSize);
- }
- else
- d.setTime(v + step);
- } while (v < axis.max && v != prev);
-
- return ticks;
- };
-
- formatter = function (v, axis) {
- var d = new Date(v);
-
- // first check global format
- if (axisOptions.timeformat != null)
- return $.plot.formatDate(d, axisOptions.timeformat, axisOptions.monthNames);
-
- var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];
- var span = axis.max - axis.min;
- var suffix = (axisOptions.twelveHourClock) ? " %p" : "";
-
- if (t < timeUnitSize.minute)
- fmt = "%h:%M:%S" + suffix;
- else if (t < timeUnitSize.day) {
- if (span < 2 * timeUnitSize.day)
- fmt = "%h:%M" + suffix;
- else
- fmt = "%b %d %h:%M" + suffix;
- }
- else if (t < timeUnitSize.month)
- fmt = "%b %d";
- else if (t < timeUnitSize.year) {
- if (span < timeUnitSize.year)
- fmt = "%b";
- else
- fmt = "%b %y";
- }
- else
- fmt = "%y";
-
- return $.plot.formatDate(d, fmt, axisOptions.monthNames);
- };
- }
- else {
- // pretty rounding of base-10 numbers
- var maxDec = axisOptions.tickDecimals;
- var dec = -Math.floor(Math.log(delta) / Math.LN10);
- if (maxDec != null && dec > maxDec)
- dec = maxDec;
-
- magn = Math.pow(10, -dec);
- norm = delta / magn; // norm is between 1.0 and 10.0
-
- if (norm < 1.5)
- size = 1;
- else if (norm < 3) {
- size = 2;
- // special case for 2.5, requires an extra decimal
- if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) {
- size = 2.5;
- ++dec;
- }
- }
- else if (norm < 7.5)
- size = 5;
- else
- size = 10;
-
- size *= magn;
-
- if (axisOptions.minTickSize != null && size < axisOptions.minTickSize)
- size = axisOptions.minTickSize;
-
- if (axisOptions.tickSize != null)
- size = axisOptions.tickSize;
-
- axis.tickDecimals = Math.max(0, (maxDec != null) ? maxDec : dec);
-
- generator = function (axis) {
- var ticks = [];
-
- // spew out all possible ticks
- var start = floorInBase(axis.min, axis.tickSize),
- i = 0, v = Number.NaN, prev;
- do {
- prev = v;
- v = start + i * axis.tickSize;
- ticks.push({ v: v, label: axis.tickFormatter(v, axis) });
- ++i;
- } while (v < axis.max && v != prev);
- return ticks;
- };
-
- formatter = function (v, axis) {
- return v.toFixed(axis.tickDecimals);
- };
- }
-
- axis.tickSize = unit ? [size, unit] : size;
- axis.tickGenerator = generator;
- if ($.isFunction(axisOptions.tickFormatter))
- axis.tickFormatter = function (v, axis) { return "" + axisOptions.tickFormatter(v, axis); };
- else
- axis.tickFormatter = formatter;
- }
-
- function setTicks(axis, axisOptions) {
- axis.ticks = [];
-
- if (!axis.used)
- return;
-
- if (axisOptions.ticks == null)
- axis.ticks = axis.tickGenerator(axis);
- else if (typeof axisOptions.ticks == "number") {
- if (axisOptions.ticks > 0)
- axis.ticks = axis.tickGenerator(axis);
- }
- else if (axisOptions.ticks) {
- var ticks = axisOptions.ticks;
-
- if ($.isFunction(ticks))
- // generate the ticks
- ticks = ticks({ min: axis.min, max: axis.max });
-
- // clean up the user-supplied ticks, copy them over
- var i, v;
- for (i = 0; i < ticks.length; ++i) {
- var label = null;
- var t = ticks[i];
- if (typeof t == "object") {
- v = t[0];
- if (t.length > 1)
- label = t[1];
- }
- else
- v = t;
- if (label == null)
- label = axis.tickFormatter(v, axis);
- axis.ticks[i] = { v: v, label: label };
- }
- }
-
- if (axisOptions.autoscaleMargin != null && axis.ticks.length > 0) {
- // snap to ticks
- if (axisOptions.min == null)
- axis.min = Math.min(axis.min, axis.ticks[0].v);
- if (axisOptions.max == null && axis.ticks.length > 1)
- axis.max = Math.max(axis.max, axis.ticks[axis.ticks.length - 1].v);
- }
- }
-
- function draw() {
- ctx.clearRect(0, 0, canvasWidth, canvasHeight);
-
- var grid = options.grid;
-
- if (grid.show && !grid.aboveData)
- drawGrid();
-
- for (var i = 0; i < series.length; ++i)
- drawSeries(series[i]);
-
- executeHooks(hooks.draw, [ctx]);
-
- if (grid.show && grid.aboveData)
- drawGrid();
- }
-
- function extractRange(ranges, coord) {
- var firstAxis = coord + "axis",
- secondaryAxis = coord + "2axis",
- axis, from, to, reverse;
-
- if (ranges[firstAxis]) {
- axis = axes[firstAxis];
- from = ranges[firstAxis].from;
- to = ranges[firstAxis].to;
- }
- else if (ranges[secondaryAxis]) {
- axis = axes[secondaryAxis];
- from = ranges[secondaryAxis].from;
- to = ranges[secondaryAxis].to;
- }
- else {
- // backwards-compat stuff - to be removed in future
- axis = axes[firstAxis];
- from = ranges[coord + "1"];
- to = ranges[coord + "2"];
- }
-
- // auto-reverse as an added bonus
- if (from != null && to != null && from > to)
- return { from: to, to: from, axis: axis };
-
- return { from: from, to: to, axis: axis };
- }
-
- function drawGrid() {
- var i;
-
- ctx.save();
- ctx.translate(plotOffset.left, plotOffset.top);
-
- // draw background, if any
- if (options.grid.backgroundColor) {
- ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)");
- ctx.fillRect(0, 0, plotWidth, plotHeight);
- }
-
- // draw markings
- var markings = options.grid.markings;
- if (markings) {
- if ($.isFunction(markings))
- // xmin etc. are backwards-compatible, to be removed in future
- markings = markings({ xmin: axes.xaxis.min, xmax: axes.xaxis.max, ymin: axes.yaxis.min, ymax: axes.yaxis.max, xaxis: axes.xaxis, yaxis: axes.yaxis, x2axis: axes.x2axis, y2axis: axes.y2axis });
-
- for (i = 0; i < markings.length; ++i) {
- var m = markings[i],
- xrange = extractRange(m, "x"),
- yrange = extractRange(m, "y");
-
- // fill in missing
- if (xrange.from == null)
- xrange.from = xrange.axis.min;
- if (xrange.to == null)
- xrange.to = xrange.axis.max;
- if (yrange.from == null)
- yrange.from = yrange.axis.min;
- if (yrange.to == null)
- yrange.to = yrange.axis.max;
-
- // clip
- if (xrange.to < xrange.axis.min || xrange.from > xrange.axis.max ||
- yrange.to < yrange.axis.min || yrange.from > yrange.axis.max)
- continue;
-
- xrange.from = Math.max(xrange.from, xrange.axis.min);
- xrange.to = Math.min(xrange.to, xrange.axis.max);
- yrange.from = Math.max(yrange.from, yrange.axis.min);
- yrange.to = Math.min(yrange.to, yrange.axis.max);
-
- if (xrange.from == xrange.to && yrange.from == yrange.to)
- continue;
-
- // then draw
- xrange.from = xrange.axis.p2c(xrange.from);
- xrange.to = xrange.axis.p2c(xrange.to);
- yrange.from = yrange.axis.p2c(yrange.from);
- yrange.to = yrange.axis.p2c(yrange.to);
-
- if (xrange.from == xrange.to || yrange.from == yrange.to) {
- // draw line
- ctx.beginPath();
- ctx.strokeStyle = m.color || options.grid.markingsColor;
- ctx.lineWidth = m.lineWidth || options.grid.markingsLineWidth;
- //ctx.moveTo(Math.floor(xrange.from), yrange.from);
- //ctx.lineTo(Math.floor(xrange.to), yrange.to);
- ctx.moveTo(xrange.from, yrange.from);
- ctx.lineTo(xrange.to, yrange.to);
- ctx.stroke();
- }
- else {
- // fill area
- ctx.fillStyle = m.color || options.grid.markingsColor;
- ctx.fillRect(xrange.from, yrange.to,
- xrange.to - xrange.from,
- yrange.from - yrange.to);
- }
- }
- }
-
- // draw the inner grid
- ctx.lineWidth = 1;
- ctx.strokeStyle = options.grid.tickColor;
- ctx.beginPath();
- var v, axis = axes.xaxis;
- for (i = 0; i < axis.ticks.length; ++i) {
- v = axis.ticks[i].v;
- if (v <= axis.min || v >= axes.xaxis.max)
- continue; // skip those lying on the axes
-
- ctx.moveTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, 0);
- ctx.lineTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, plotHeight);
- }
-
- axis = axes.yaxis;
- for (i = 0; i < axis.ticks.length; ++i) {
- v = axis.ticks[i].v;
- if (v <= axis.min || v >= axis.max)
- continue;
-
- ctx.moveTo(0, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);
- ctx.lineTo(plotWidth, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);
- }
-
- axis = axes.x2axis;
- for (i = 0; i < axis.ticks.length; ++i) {
- v = axis.ticks[i].v;
- if (v <= axis.min || v >= axis.max)
- continue;
-
- ctx.moveTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, -5);
- ctx.lineTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, 5);
- }
-
- axis = axes.y2axis;
- for (i = 0; i < axis.ticks.length; ++i) {
- v = axis.ticks[i].v;
- if (v <= axis.min || v >= axis.max)
- continue;
-
- ctx.moveTo(plotWidth-5, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);
- ctx.lineTo(plotWidth+5, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);
- }
-
- ctx.stroke();
-
- if (options.grid.borderWidth) {
- // draw border
- var bw = options.grid.borderWidth;
- ctx.lineWidth = bw;
- ctx.strokeStyle = options.grid.borderColor;
- ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw);
- }
-
- ctx.restore();
- }
-
- function insertLabels() {
- placeholder.find(".tickLabels").remove();
-
- var html = [''];
-
- function addLabels(axis, labelGenerator) {
- for (var i = 0; i < axis.ticks.length; ++i) {
- var tick = axis.ticks[i];
- if (!tick.label || tick.v < axis.min || tick.v > axis.max)
- continue;
- html.push(labelGenerator(tick, axis));
- }
- }
-
- var margin = options.grid.labelMargin + options.grid.borderWidth;
-
- addLabels(axes.xaxis, function (tick, axis) {
- return '
');
-
- placeholder.append(html.join(""));
- }
-
- function drawSeries(series) {
- if (series.lines.show)
- drawSeriesLines(series);
- if (series.bars.show)
- drawSeriesBars(series);
- if (series.points.show)
- drawSeriesPoints(series);
- }
-
- function drawSeriesLines(series) {
- function plotLine(datapoints, xoffset, yoffset, axisx, axisy) {
- var points = datapoints.points,
- ps = datapoints.pointsize,
- prevx = null, prevy = null;
-
- ctx.beginPath();
- for (var i = ps; i < points.length; i += ps) {
- var x1 = points[i - ps], y1 = points[i - ps + 1],
- x2 = points[i], y2 = points[i + 1];
-
- if (x1 == null || x2 == null)
- continue;
-
- // clip with ymin
- if (y1 <= y2 && y1 < axisy.min) {
- if (y2 < axisy.min)
- continue; // line segment is outside
- // compute new intersection point
- x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
- y1 = axisy.min;
- }
- else if (y2 <= y1 && y2 < axisy.min) {
- if (y1 < axisy.min)
- continue;
- x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
- y2 = axisy.min;
- }
-
- // clip with ymax
- if (y1 >= y2 && y1 > axisy.max) {
- if (y2 > axisy.max)
- continue;
- x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
- y1 = axisy.max;
- }
- else if (y2 >= y1 && y2 > axisy.max) {
- if (y1 > axisy.max)
- continue;
- x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
- y2 = axisy.max;
- }
-
- // clip with xmin
- if (x1 <= x2 && x1 < axisx.min) {
- if (x2 < axisx.min)
- continue;
- y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
- x1 = axisx.min;
- }
- else if (x2 <= x1 && x2 < axisx.min) {
- if (x1 < axisx.min)
- continue;
- y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
- x2 = axisx.min;
- }
-
- // clip with xmax
- if (x1 >= x2 && x1 > axisx.max) {
- if (x2 > axisx.max)
- continue;
- y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
- x1 = axisx.max;
- }
- else if (x2 >= x1 && x2 > axisx.max) {
- if (x1 > axisx.max)
- continue;
- y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
- x2 = axisx.max;
- }
-
- if (x1 != prevx || y1 != prevy)
- ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset);
-
- prevx = x2;
- prevy = y2;
- ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2) + yoffset);
- }
- ctx.stroke();
- }
-
- function plotLineArea(datapoints, axisx, axisy) {
- var points = datapoints.points,
- ps = datapoints.pointsize,
- bottom = Math.min(Math.max(0, axisy.min), axisy.max),
- top, lastX = 0, areaOpen = false;
-
- for (var i = ps; i < points.length; i += ps) {
- var x1 = points[i - ps], y1 = points[i - ps + 1],
- x2 = points[i], y2 = points[i + 1];
-
- if (areaOpen && x1 != null && x2 == null) {
- // close area
- ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom));
- ctx.fill();
- areaOpen = false;
- continue;
- }
-
- if (x1 == null || x2 == null)
- continue;
-
- // clip x values
-
- // clip with xmin
- if (x1 <= x2 && x1 < axisx.min) {
- if (x2 < axisx.min)
- continue;
- y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
- x1 = axisx.min;
- }
- else if (x2 <= x1 && x2 < axisx.min) {
- if (x1 < axisx.min)
- continue;
- y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
- x2 = axisx.min;
- }
-
- // clip with xmax
- if (x1 >= x2 && x1 > axisx.max) {
- if (x2 > axisx.max)
- continue;
- y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
- x1 = axisx.max;
- }
- else if (x2 >= x1 && x2 > axisx.max) {
- if (x1 > axisx.max)
- continue;
- y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
- x2 = axisx.max;
- }
-
- if (!areaOpen) {
- // open area
- ctx.beginPath();
- ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom));
- areaOpen = true;
- }
-
- // now first check the case where both is outside
- if (y1 >= axisy.max && y2 >= axisy.max) {
- ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));
- ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));
- lastX = x2;
- continue;
- }
- else if (y1 <= axisy.min && y2 <= axisy.min) {
- ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min));
- ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min));
- lastX = x2;
- continue;
- }
-
- // else it's a bit more complicated, there might
- // be two rectangles and two triangles we need to fill
- // in; to find these keep track of the current x values
- var x1old = x1, x2old = x2;
-
- // and clip the y values, without shortcutting
-
- // clip with ymin
- if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) {
- x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
- y1 = axisy.min;
- }
- else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) {
- x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
- y2 = axisy.min;
- }
-
- // clip with ymax
- if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) {
- x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
- y1 = axisy.max;
- }
- else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) {
- x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
- y2 = axisy.max;
- }
-
-
- // if the x value was changed we got a rectangle
- // to fill
- if (x1 != x1old) {
- if (y1 <= axisy.min)
- top = axisy.min;
- else
- top = axisy.max;
-
- ctx.lineTo(axisx.p2c(x1old), axisy.p2c(top));
- ctx.lineTo(axisx.p2c(x1), axisy.p2c(top));
- }
-
- // fill the triangles
- ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1));
- ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
-
- // fill the other rectangle if it's there
- if (x2 != x2old) {
- if (y2 <= axisy.min)
- top = axisy.min;
- else
- top = axisy.max;
-
- ctx.lineTo(axisx.p2c(x2), axisy.p2c(top));
- ctx.lineTo(axisx.p2c(x2old), axisy.p2c(top));
- }
-
- lastX = Math.max(x2, x2old);
- }
-
- if (areaOpen) {
- ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom));
- ctx.fill();
- }
- }
-
- ctx.save();
- ctx.translate(plotOffset.left, plotOffset.top);
- ctx.lineJoin = "round";
-
- var lw = series.lines.lineWidth,
- sw = series.shadowSize;
- // FIXME: consider another form of shadow when filling is turned on
- if (lw > 0 && sw > 0) {
- // draw shadow as a thick and thin line with transparency
- ctx.lineWidth = sw;
- ctx.strokeStyle = "rgba(0,0,0,0.1)";
- // position shadow at angle from the mid of line
- var angle = Math.PI/18;
- plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/2), Math.cos(angle) * (lw/2 + sw/2), series.xaxis, series.yaxis);
- ctx.lineWidth = sw/2;
- plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/4), Math.cos(angle) * (lw/2 + sw/4), series.xaxis, series.yaxis);
- }
-
- ctx.lineWidth = lw;
- ctx.strokeStyle = series.color;
- var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight);
- if (fillStyle) {
- ctx.fillStyle = fillStyle;
- plotLineArea(series.datapoints, series.xaxis, series.yaxis);
- }
-
- if (lw > 0)
- plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis);
- ctx.restore();
- }
-
- function drawSeriesPoints(series) {
- function plotPoints(datapoints, radius, fillStyle, offset, circumference, axisx, axisy) {
- var points = datapoints.points, ps = datapoints.pointsize;
-
- for (var i = 0; i < points.length; i += ps) {
- var x = points[i], y = points[i + 1];
- if (x == null || x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max)
- continue;
-
- ctx.beginPath();
- ctx.arc(axisx.p2c(x), axisy.p2c(y) + offset, radius, 0, circumference, false);
- if (fillStyle) {
- ctx.fillStyle = fillStyle;
- ctx.fill();
- }
- ctx.stroke();
- }
- }
-
- ctx.save();
- ctx.translate(plotOffset.left, plotOffset.top);
-
- var lw = series.lines.lineWidth,
- sw = series.shadowSize,
- radius = series.points.radius;
- if (lw > 0 && sw > 0) {
- // draw shadow in two steps
- var w = sw / 2;
- ctx.lineWidth = w;
- ctx.strokeStyle = "rgba(0,0,0,0.1)";
- plotPoints(series.datapoints, radius, null, w + w/2, Math.PI,
- series.xaxis, series.yaxis);
-
- ctx.strokeStyle = "rgba(0,0,0,0.2)";
- plotPoints(series.datapoints, radius, null, w/2, Math.PI,
- series.xaxis, series.yaxis);
- }
-
- ctx.lineWidth = lw;
- ctx.strokeStyle = series.color;
- plotPoints(series.datapoints, radius,
- getFillStyle(series.points, series.color), 0, 2 * Math.PI,
- series.xaxis, series.yaxis);
- ctx.restore();
- }
-
- function drawBar(x, y, b, barLeft, barRight, offset, fillStyleCallback, axisx, axisy, c, horizontal) {
- var left, right, bottom, top,
- drawLeft, drawRight, drawTop, drawBottom,
- tmp;
-
- if (horizontal) {
- drawBottom = drawRight = drawTop = true;
- drawLeft = false;
- left = b;
- right = x;
- top = y + barLeft;
- bottom = y + barRight;
-
- // account for negative bars
- if (right < left) {
- tmp = right;
- right = left;
- left = tmp;
- drawLeft = true;
- drawRight = false;
- }
- }
- else {
- drawLeft = drawRight = drawTop = true;
- drawBottom = false;
- left = x + barLeft;
- right = x + barRight;
- bottom = b;
- top = y;
-
- // account for negative bars
- if (top < bottom) {
- tmp = top;
- top = bottom;
- bottom = tmp;
- drawBottom = true;
- drawTop = false;
- }
- }
-
- // clip
- if (right < axisx.min || left > axisx.max ||
- top < axisy.min || bottom > axisy.max)
- return;
-
- if (left < axisx.min) {
- left = axisx.min;
- drawLeft = false;
- }
-
- if (right > axisx.max) {
- right = axisx.max;
- drawRight = false;
- }
-
- if (bottom < axisy.min) {
- bottom = axisy.min;
- drawBottom = false;
- }
-
- if (top > axisy.max) {
- top = axisy.max;
- drawTop = false;
- }
-
- left = axisx.p2c(left);
- bottom = axisy.p2c(bottom);
- right = axisx.p2c(right);
- top = axisy.p2c(top);
-
- // fill the bar
- if (fillStyleCallback) {
- c.beginPath();
- c.moveTo(left, bottom);
- c.lineTo(left, top);
- c.lineTo(right, top);
- c.lineTo(right, bottom);
- c.fillStyle = fillStyleCallback(bottom, top);
- c.fill();
- }
-
- // draw outline
- if (drawLeft || drawRight || drawTop || drawBottom) {
- c.beginPath();
-
- // FIXME: inline moveTo is buggy with excanvas
- c.moveTo(left, bottom + offset);
- if (drawLeft)
- c.lineTo(left, top + offset);
- else
- c.moveTo(left, top + offset);
- if (drawTop)
- c.lineTo(right, top + offset);
- else
- c.moveTo(right, top + offset);
- if (drawRight)
- c.lineTo(right, bottom + offset);
- else
- c.moveTo(right, bottom + offset);
- if (drawBottom)
- c.lineTo(left, bottom + offset);
- else
- c.moveTo(left, bottom + offset);
- c.stroke();
- }
- }
-
- function drawSeriesBars(series) {
- function plotBars(datapoints, barLeft, barRight, offset, fillStyleCallback, axisx, axisy) {
- var points = datapoints.points, ps = datapoints.pointsize;
-
- for (var i = 0; i < points.length; i += ps) {
- if (points[i] == null)
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- }
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-
- ctx.save();
- ctx.translate(plotOffset.left, plotOffset.top);
-
- // FIXME: figure out a way to add shadows (for instance along the right edge)
- ctx.lineWidth = series.bars.lineWidth;
- ctx.strokeStyle = series.color;
- var barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2;
- var fillStyleCallback = series.bars.fill ? function (bottom, top) { return getFillStyle(series.bars, series.color, bottom, top); } : null;
- plotBars(series.datapoints, barLeft, barLeft + series.bars.barWidth, 0, fillStyleCallback, series.xaxis, series.yaxis);
- ctx.restore();
- }
-
- function getFillStyle(filloptions, seriesColor, bottom, top) {
- var fill = filloptions.fill;
- if (!fill)
- return null;
-
- if (filloptions.fillColor)
- return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor);
-
- var c = $.color.parse(seriesColor);
- c.a = typeof fill == "number" ? fill : 0.4;
- c.normalize();
- return c.toString();
- }
-
- function insertLegend() {
- placeholder.find(".legend").remove();
-
- if (!options.legend.show)
- return;
-
- var fragments = [], rowStarted = false,
- lf = options.legend.labelFormatter, s, label;
- for (i = 0; i < series.length; ++i) {
- s = series[i];
- label = s.label;
- if (!label)
- continue;
-
- if (i % options.legend.noColumns == 0) {
- if (rowStarted)
- fragments.push('');
- fragments.push('' + tick.label + "
";
- });
-
-
- addLabels(axes.yaxis, function (tick, axis) {
- return '' + tick.label + "
";
- });
-
- addLabels(axes.x2axis, function (tick, axis) {
- return '' + tick.label + "
";
- });
-
- addLabels(axes.y2axis, function (tick, axis) {
- return '' + tick.label + "
";
- });
-
- html.push('' + table.replace('style="', 'style="position:absolute;' + pos +';') + '
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- if (options.legend.backgroundOpacity != 0.0) {
- // put in the transparent background
- // separately to avoid blended labels and
- // label boxes
- var c = options.legend.backgroundColor;
- if (c == null) {
- c = options.grid.backgroundColor;
- if (c && typeof c == "string")
- c = $.color.parse(c);
- else
- c = $.color.extract(legend, 'background-color');
- c.a = 1;
- c = c.toString();
- }
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