/**
* Line charts
*/
$.fn.sparkline.line = line = createClass($.fn.sparkline._base, {
type: 'line',
init: function (el, values, options, width, height) {
line._super.init.call(this, el, values, options, width, height);
this.vertices = [];
this.regionMap = [];
this.xvalues = [];
this.yvalues = [];
this.yminmax = [];
this.hightlightSpotId = null;
this.lastShapeId = null;
this.initTarget();
},
getRegion: function (el, x, y) {
var i,
regionMap = this.regionMap; // maps regions to value positions
for (i = regionMap.length; i--;) {
if (regionMap[i] !== null && x >= regionMap[i][0] && x <= regionMap[i][1]) {
return regionMap[i][2];
}
}
return undefined;
},
getCurrentRegionFields: function () {
var currentRegion = this.currentRegion;
return {
isNull: this.yvalues[currentRegion] === null,
x: this.xvalues[currentRegion],
y: this.yvalues[currentRegion],
color: this.options.get('lineColor'),
fillColor: this.options.get('fillColor'),
offset: currentRegion
};
},
renderHighlight: function () {
var currentRegion = this.currentRegion,
target = this.target,
vertex = this.vertices[currentRegion],
options = this.options,
spotRadius = options.get('spotRadius'),
highlightSpotColor = options.get('highlightSpotColor'),
highlightLineColor = options.get('highlightLineColor'),
highlightSpot, highlightLine;
if (!vertex) {
return;
}
if (spotRadius && highlightSpotColor) {
highlightSpot = target.drawCircle(vertex[0], vertex[1],
spotRadius, undefined, highlightSpotColor);
this.highlightSpotId = highlightSpot.id;
target.insertAfterShape(this.lastShapeId, highlightSpot);
}
if (highlightLineColor) {
highlightLine = target.drawLine(vertex[0], this.canvasTop, vertex[0],
this.canvasTop + this.canvasHeight, highlightLineColor);
this.highlightLineId = highlightLine.id;
target.insertAfterShape(this.lastShapeId, highlightLine);
}
},
removeHighlight: function () {
var target = this.target;
if (this.highlightSpotId) {
target.removeShapeId(this.highlightSpotId);
this.highlightSpotId = null;
}
if (this.highlightLineId) {
target.removeShapeId(this.highlightLineId);
this.highlightLineId = null;
}
},
scanValues: function () {
var values = this.values,
valcount = values.length,
xvalues = this.xvalues,
yvalues = this.yvalues,
yminmax = this.yminmax,
i, val, isStr, isArray, sp;
for (i = 0; i < valcount; i++) {
val = values[i];
isStr = typeof(values[i]) === 'string';
isArray = typeof(values[i]) === 'object' && values[i] instanceof Array;
sp = isStr && values[i].split(':');
if (isStr && sp.length === 2) { // x:y
xvalues.push(Number(sp[0]));
yvalues.push(Number(sp[1]));
yminmax.push(Number(sp[1]));
} else if (isArray) {
xvalues.push(val[0]);
yvalues.push(val[1]);
yminmax.push(val[1]);
} else {
xvalues.push(i);
if (values[i] === null || values[i] === 'null') {
yvalues.push(null);
} else {
yvalues.push(Number(val));
yminmax.push(Number(val));
}
}
}
if (this.options.get('xvalues')) {
xvalues = this.options.get('xvalues');
}
this.maxy = this.maxyorg = Math.max.apply(Math, yminmax);
this.miny = this.minyorg = Math.min.apply(Math, yminmax);
this.maxx = Math.max.apply(Math, xvalues);
this.minx = Math.min.apply(Math, xvalues);
this.xvalues = xvalues;
this.yvalues = yvalues;
this.yminmax = yminmax;
},
processRangeOptions: function () {
var options = this.options,
normalRangeMin = options.get('normalRangeMin'),
normalRangeMax = options.get('normalRangeMax');
if (normalRangeMin !== undefined) {
if (normalRangeMin < this.miny) {
this.miny = normalRangeMin;
}
if (normalRangeMax > this.maxy) {
this.maxy = normalRangeMax;
}
}
if (options.get('chartRangeMin') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMin') < this.miny)) {
this.miny = options.get('chartRangeMin');
}
if (options.get('chartRangeMax') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMax') > this.maxy)) {
this.maxy = options.get('chartRangeMax');
}
if (options.get('chartRangeMinX') !== undefined && (options.get('chartRangeClipX') || options.get('chartRangeMinX') < this.minx)) {
this.minx = options.get('chartRangeMinX');
}
if (options.get('chartRangeMaxX') !== undefined && (options.get('chartRangeClipX') || options.get('chartRangeMaxX') > this.maxx)) {
this.maxx = options.get('chartRangeMaxX');
}
},
drawNormalRange: function (canvasLeft, canvasTop, canvasHeight, canvasWidth, rangey) {
var normalRangeMin = this.options.get('normalRangeMin'),
normalRangeMax = this.options.get('normalRangeMax'),
ytop = canvasTop + Math.round(canvasHeight - (canvasHeight * ((normalRangeMax - this.miny) / rangey))),
height = Math.round((canvasHeight * (normalRangeMax - normalRangeMin)) / rangey);
this.target.drawRect(canvasLeft, ytop, canvasWidth, height, undefined, this.options.get('normalRangeColor')).append();
},
render: function () {
var options = this.options,
target = this.target,
canvasWidth = this.canvasWidth,
canvasHeight = this.canvasHeight,
vertices = this.vertices,
spotRadius = options.get('spotRadius'),
regionMap = this.regionMap,
rangex, rangey, yvallast,
canvasTop, canvasLeft,
vertex, path, paths, x, y, xnext, xpos, xposnext,
last, next, yvalcount, lineShapes, fillShapes, plen,
valueSpots, hlSpotsEnabled, color, xvalues, yvalues, i;
if (!line._super.render.call(this)) {
return;
}
this.scanValues();
this.processRangeOptions();
xvalues = this.xvalues;
yvalues = this.yvalues;
if (!this.yminmax.length || this.yvalues.length < 2) {
// empty or all null valuess
return;
}
canvasTop = canvasLeft = 0;
rangex = this.maxx - this.minx === 0 ? 1 : this.maxx - this.minx;
rangey = this.maxy - this.miny === 0 ? 1 : this.maxy - this.miny;
yvallast = this.yvalues.length - 1;
if (spotRadius && (canvasWidth < (spotRadius * 4) || canvasHeight < (spotRadius * 4))) {
spotRadius = 0;
}
if (spotRadius) {
// adjust the canvas size as required so that spots will fit
hlSpotsEnabled = options.get('highlightSpotColor') && !options.get('disableInteraction');
if (hlSpotsEnabled || options.get('minSpotColor') || (options.get('spotColor') && yvalues[yvallast] === this.miny)) {
canvasHeight -= Math.ceil(spotRadius);
}
if (hlSpotsEnabled || options.get('maxSpotColor') || (options.get('spotColor') && yvalues[yvallast] === this.maxy)) {
canvasHeight -= Math.ceil(spotRadius);
canvasTop += Math.ceil(spotRadius);
}
if (hlSpotsEnabled ||
((options.get('minSpotColor') || options.get('maxSpotColor')) && (yvalues[0] === this.miny || yvalues[0] === this.maxy))) {
canvasLeft += Math.ceil(spotRadius);
canvasWidth -= Math.ceil(spotRadius);
}
if (hlSpotsEnabled || options.get('spotColor') ||
(options.get('minSpotColor') || options.get('maxSpotColor') &&
(yvalues[yvallast] === this.miny || yvalues[yvallast] === this.maxy))) {
canvasWidth -= Math.ceil(spotRadius);
}
}
canvasHeight--;
if (options.get('normalRangeMin') !== undefined && !options.get('drawNormalOnTop')) {
this.drawNormalRange(canvasLeft, canvasTop, canvasHeight, canvasWidth, rangey);
}
path = [];
paths = [path];
last = next = null;
yvalcount = yvalues.length;
for (i = 0; i < yvalcount; i++) {
x = xvalues[i];
xnext = xvalues[i + 1];
y = yvalues[i];
xpos = canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex));
xposnext = i < yvalcount - 1 ? canvasLeft + Math.round((xnext - this.minx) * (canvasWidth / rangex)) : canvasWidth;
next = xpos + ((xposnext - xpos) / 2);
regionMap[i] = [last || 0, next, i];
last = next;
if (y === null) {
if (i) {
if (yvalues[i - 1] !== null) {
path = [];
paths.push(path);
}
vertices.push(null);
}
} else {
if (y < this.miny) {
y = this.miny;
}
if (y > this.maxy) {
y = this.maxy;
}
if (!path.length) {
// previous value was null
path.push([xpos, canvasTop + canvasHeight]);
}
vertex = [xpos, canvasTop + Math.round(canvasHeight - (canvasHeight * ((y - this.miny) / rangey)))];
path.push(vertex);
vertices.push(vertex);
}
}
lineShapes = [];
fillShapes = [];
plen = paths.length;
for (i = 0; i < plen; i++) {
path = paths[i];
if (path.length) {
if (options.get('fillColor')) {
path.push([path[path.length - 1][0], (canvasTop + canvasHeight)]);
fillShapes.push(path.slice(0));
path.pop();
}
// if there's only a single point in this path, then we want to display it
// as a vertical line which means we keep path[0] as is
if (path.length > 2) {
// else we want the first value
path[0] = [path[0][0], path[1][1]];
}
lineShapes.push(path);
}
}
// draw the fill first, then optionally the normal range, then the line on top of that
plen = fillShapes.length;
for (i = 0; i < plen; i++) {
target.drawShape(fillShapes[i],
options.get('fillColor'), options.get('fillColor')).append();
}
if (options.get('normalRangeMin') !== undefined && options.get('drawNormalOnTop')) {
this.drawNormalRange(canvasLeft, canvasTop, canvasHeight, canvasWidth, rangey);
}
plen = lineShapes.length;
for (i = 0; i < plen; i++) {
target.drawShape(lineShapes[i], options.get('lineColor'), undefined,
options.get('lineWidth')).append();
}
if (spotRadius && options.get('valueSpots')) {
valueSpots = options.get('valueSpots');
if (valueSpots.get === undefined) {
valueSpots = new RangeMap(valueSpots);
}
for (i = 0; i < yvalcount; i++) {
color = valueSpots.get(yvalues[i]);
if (color) {
target.drawCircle(canvasLeft + Math.round((xvalues[i] - this.minx) * (canvasWidth / rangex)),
canvasTop + Math.round(canvasHeight - (canvasHeight * ((yvalues[i] - this.miny) / rangey))),
spotRadius, undefined,
color).append();
}
}
}
if (spotRadius && options.get('spotColor') && yvalues[yvallast] !== null) {
target.drawCircle(canvasLeft + Math.round((xvalues[xvalues.length - 1] - this.minx) * (canvasWidth / rangex)),
canvasTop + Math.round(canvasHeight - (canvasHeight * ((yvalues[yvallast] - this.miny) / rangey))),
spotRadius, undefined,
options.get('spotColor')).append();
}
if (this.maxy !== this.minyorg) {
if (spotRadius && options.get('minSpotColor')) {
x = xvalues[$.inArray(this.minyorg, yvalues)];
target.drawCircle(canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex)),
canvasTop + Math.round(canvasHeight - (canvasHeight * ((this.minyorg - this.miny) / rangey))),
spotRadius, undefined,
options.get('minSpotColor')).append();
}
if (spotRadius && options.get('maxSpotColor')) {
x = xvalues[$.inArray(this.maxyorg, yvalues)];
target.drawCircle(canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex)),
canvasTop + Math.round(canvasHeight - (canvasHeight * ((this.maxyorg - this.miny) / rangey))),
spotRadius, undefined,
options.get('maxSpotColor')).append();
}
}
this.lastShapeId = target.getLastShapeId();
this.canvasTop = canvasTop;
target.render();
}
});
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