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define(function (require) {
var graphic = require('../../util/graphic');
var HeatmapLayer = require('./HeatmapLayer');
var zrUtil = require('zrender/core/util');
function getIsInPiecewiseRange(dataExtent, pieceList, selected) {
var dataSpan = dataExtent[1] - dataExtent[0];
pieceList = zrUtil.map(pieceList, function (piece) {
return {
interval: [
(piece.interval[0] - dataExtent[0]) / dataSpan,
(piece.interval[1] - dataExtent[0]) / dataSpan
]
};
});
var len = pieceList.length;
var lastIndex = 0;
return function (val) {
// Try to find in the location of the last found
for (var i = lastIndex; i < len; i++) {
var interval = pieceList[i].interval;
if (interval[0] <= val && val <= interval[1]) {
lastIndex = i;
break;
}
}
if (i === len) { // Not found, back interation
for (var i = lastIndex - 1; i >= 0; i--) {
var interval = pieceList[i].interval;
if (interval[0] <= val && val <= interval[1]) {
lastIndex = i;
break;
}
}
}
return i >= 0 && i < len && selected[i];
};
}
function getIsInContinuousRange(dataExtent, range) {
var dataSpan = dataExtent[1] - dataExtent[0];
range = [
(range[0] - dataExtent[0]) / dataSpan,
(range[1] - dataExtent[0]) / dataSpan
];
return function (val) {
return val >= range[0] && val <= range[1];
};
}
function isGeoCoordSys(coordSys) {
var dimensions = coordSys.dimensions;
// Not use coorSys.type === 'geo' because coordSys maybe extended
return dimensions[0] === 'lng' && dimensions[1] === 'lat';
}
return require('../../echarts').extendChartView({
type: 'heatmap',
render: function (seriesModel, ecModel, api) {
var visualMapOfThisSeries;
ecModel.eachComponent('visualMap', function (visualMap) {
visualMap.eachTargetSeries(function (targetSeries) {
if (targetSeries === seriesModel) {
visualMapOfThisSeries = visualMap;
}
});
});
if (__DEV__) {
if (!visualMapOfThisSeries) {
throw new Error('Heatmap must use with visualMap');
}
}
this.group.removeAll();
var coordSys = seriesModel.coordinateSystem;
if (coordSys.type === 'cartesian2d') {
this._renderOnCartesian(coordSys, seriesModel, api);
}
else if (isGeoCoordSys(coordSys)) {
this._renderOnGeo(
coordSys, seriesModel, visualMapOfThisSeries, api
);
}
},
_renderOnCartesian: function (cartesian, seriesModel, api) {
var xAxis = cartesian.getAxis('x');
var yAxis = cartesian.getAxis('y');
var group = this.group;
if (__DEV__) {
if (!(xAxis.type === 'category' && yAxis.type === 'category')) {
throw new Error('Heatmap on cartesian must have two category axes');
}
if (!(xAxis.onBand && yAxis.onBand)) {
throw new Error('Heatmap on cartesian must have two axes with boundaryGap true');
}
}
var width = xAxis.getBandWidth();
var height = yAxis.getBandWidth();
var data = seriesModel.getData();
var itemStyleQuery = 'itemStyle.normal';
var hoverItemStyleQuery = 'itemStyle.emphasis';
var labelQuery = 'label.normal';
var hoverLabelQuery = 'label.emphasis';
var style = seriesModel.getModel(itemStyleQuery).getItemStyle(['color']);
var hoverStl = seriesModel.getModel(hoverItemStyleQuery).getItemStyle();
var labelModel = seriesModel.getModel('label.normal');
var hoverLabelModel = seriesModel.getModel('label.emphasis');
data.each(['x', 'y', 'z'], function (x, y, z, idx) {
var itemModel = data.getItemModel(idx);
var point = cartesian.dataToPoint([x, y]);
// Ignore empty data
if (isNaN(z)) {
return;
}
var rect = new graphic.Rect({
shape: {
x: point[0] - width / 2,
y: point[1] - height / 2,
width: width,
height: height
},
style: {
fill: data.getItemVisual(idx, 'color'),
opacity: data.getItemVisual(idx, 'opacity')
}
});
// Optimization for large datset
if (data.hasItemOption) {
style = itemModel.getModel(itemStyleQuery).getItemStyle(['color']);
hoverStl = itemModel.getModel(hoverItemStyleQuery).getItemStyle();
labelModel = itemModel.getModel(labelQuery);
hoverLabelModel = itemModel.getModel(hoverLabelQuery);
}
var rawValue = seriesModel.getRawValue(idx);
var defaultText = '-';
if (rawValue && rawValue[2] != null) {
defaultText = rawValue[2];
}
if (labelModel.getShallow('show')) {
graphic.setText(style, labelModel);
style.text = seriesModel.getFormattedLabel(idx, 'normal') || defaultText;
}
if (hoverLabelModel.getShallow('show')) {
graphic.setText(hoverStl, hoverLabelModel);
hoverStl.text = seriesModel.getFormattedLabel(idx, 'emphasis') || defaultText;
}
rect.setStyle(style);
graphic.setHoverStyle(rect, data.hasItemOption ? hoverStl : zrUtil.extend({}, hoverStl));
group.add(rect);
data.setItemGraphicEl(idx, rect);
});
},
_renderOnGeo: function (geo, seriesModel, visualMapModel, api) {
var inRangeVisuals = visualMapModel.targetVisuals.inRange;
var outOfRangeVisuals = visualMapModel.targetVisuals.outOfRange;
// if (!visualMapping) {
// throw new Error('Data range must have color visuals');
// }
var data = seriesModel.getData();
var hmLayer = this._hmLayer || (this._hmLayer || new HeatmapLayer());
hmLayer.blurSize = seriesModel.get('blurSize');
hmLayer.pointSize = seriesModel.get('pointSize');
hmLayer.minOpacity = seriesModel.get('minOpacity');
hmLayer.maxOpacity = seriesModel.get('maxOpacity');
var rect = geo.getViewRect().clone();
var roamTransform = geo.getRoamTransform().transform;
rect.applyTransform(roamTransform);
// Clamp on viewport
var x = Math.max(rect.x, 0);
var y = Math.max(rect.y, 0);
var x2 = Math.min(rect.width + rect.x, api.getWidth());
var y2 = Math.min(rect.height + rect.y, api.getHeight());
var width = x2 - x;
var height = y2 - y;
var points = data.mapArray(['lng', 'lat', 'value'], function (lng, lat, value) {
var pt = geo.dataToPoint([lng, lat]);
pt[0] -= x;
pt[1] -= y;
pt.push(value);
return pt;
});
var dataExtent = visualMapModel.getExtent();
var isInRange = visualMapModel.type === 'visualMap.continuous'
? getIsInContinuousRange(dataExtent, visualMapModel.option.range)
: getIsInPiecewiseRange(
dataExtent, visualMapModel.getPieceList(), visualMapModel.option.selected
);
hmLayer.update(
points, width, height,
inRangeVisuals.color.getNormalizer(),
{
inRange: inRangeVisuals.color.getColorMapper(),
outOfRange: outOfRangeVisuals.color.getColorMapper()
},
isInRange
);
var img = new graphic.Image({
style: {
width: width,
height: height,
x: x,
y: y,
image: hmLayer.canvas
},
silent: true
});
this.group.add(img);
}
});
});
