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jefferyzhao
2025-07-31 17:44:12 +08:00
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181
node_modules/echarts/lib/chart/heatmap/HeatmapLayer.js generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
var zrUtil = require("zrender/lib/core/util");
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/* global Uint8ClampedArray */
var GRADIENT_LEVELS = 256;
/**
* Heatmap Chart
*
* @class
*/
function Heatmap() {
var canvas = zrUtil.createCanvas();
this.canvas = canvas;
this.blurSize = 30;
this.pointSize = 20;
this.maxOpacity = 1;
this.minOpacity = 0;
this._gradientPixels = {};
}
Heatmap.prototype = {
/**
* Renders Heatmap and returns the rendered canvas
* @param {Array} data array of data, each has x, y, value
* @param {number} width canvas width
* @param {number} height canvas height
*/
update: function (data, width, height, normalize, colorFunc, isInRange) {
var brush = this._getBrush();
var gradientInRange = this._getGradient(data, colorFunc, 'inRange');
var gradientOutOfRange = this._getGradient(data, colorFunc, 'outOfRange');
var r = this.pointSize + this.blurSize;
var canvas = this.canvas;
var ctx = canvas.getContext('2d');
var len = data.length;
canvas.width = width;
canvas.height = height;
for (var i = 0; i < len; ++i) {
var p = data[i];
var x = p[0];
var y = p[1];
var value = p[2]; // calculate alpha using value
var alpha = normalize(value); // draw with the circle brush with alpha
ctx.globalAlpha = alpha;
ctx.drawImage(brush, x - r, y - r);
}
if (!canvas.width || !canvas.height) {
// Avoid "Uncaught DOMException: Failed to execute 'getImageData' on
// 'CanvasRenderingContext2D': The source height is 0."
return canvas;
} // colorize the canvas using alpha value and set with gradient
var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
var pixels = imageData.data;
var offset = 0;
var pixelLen = pixels.length;
var minOpacity = this.minOpacity;
var maxOpacity = this.maxOpacity;
var diffOpacity = maxOpacity - minOpacity;
while (offset < pixelLen) {
var alpha = pixels[offset + 3] / 256;
var gradientOffset = Math.floor(alpha * (GRADIENT_LEVELS - 1)) * 4; // Simple optimize to ignore the empty data
if (alpha > 0) {
var gradient = isInRange(alpha) ? gradientInRange : gradientOutOfRange; // Any alpha > 0 will be mapped to [minOpacity, maxOpacity]
alpha > 0 && (alpha = alpha * diffOpacity + minOpacity);
pixels[offset++] = gradient[gradientOffset];
pixels[offset++] = gradient[gradientOffset + 1];
pixels[offset++] = gradient[gradientOffset + 2];
pixels[offset++] = gradient[gradientOffset + 3] * alpha * 256;
} else {
offset += 4;
}
}
ctx.putImageData(imageData, 0, 0);
return canvas;
},
/**
* get canvas of a black circle brush used for canvas to draw later
* @private
* @returns {Object} circle brush canvas
*/
_getBrush: function () {
var brushCanvas = this._brushCanvas || (this._brushCanvas = zrUtil.createCanvas()); // set brush size
var r = this.pointSize + this.blurSize;
var d = r * 2;
brushCanvas.width = d;
brushCanvas.height = d;
var ctx = brushCanvas.getContext('2d');
ctx.clearRect(0, 0, d, d); // in order to render shadow without the distinct circle,
// draw the distinct circle in an invisible place,
// and use shadowOffset to draw shadow in the center of the canvas
ctx.shadowOffsetX = d;
ctx.shadowBlur = this.blurSize; // draw the shadow in black, and use alpha and shadow blur to generate
// color in color map
ctx.shadowColor = '#000'; // draw circle in the left to the canvas
ctx.beginPath();
ctx.arc(-r, r, this.pointSize, 0, Math.PI * 2, true);
ctx.closePath();
ctx.fill();
return brushCanvas;
},
/**
* get gradient color map
* @private
*/
_getGradient: function (data, colorFunc, state) {
var gradientPixels = this._gradientPixels;
var pixelsSingleState = gradientPixels[state] || (gradientPixels[state] = new Uint8ClampedArray(256 * 4));
var color = [0, 0, 0, 0];
var off = 0;
for (var i = 0; i < 256; i++) {
colorFunc[state](i / 255, true, color);
pixelsSingleState[off++] = color[0];
pixelsSingleState[off++] = color[1];
pixelsSingleState[off++] = color[2];
pixelsSingleState[off++] = color[3];
}
return pixelsSingleState;
}
};
var _default = Heatmap;
module.exports = _default;

76
node_modules/echarts/lib/chart/heatmap/HeatmapSeries.js generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
var SeriesModel = require("../../model/Series");
var createListFromArray = require("../helper/createListFromArray");
var CoordinateSystem = require("../../CoordinateSystem");
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
var _default = SeriesModel.extend({
type: 'series.heatmap',
getInitialData: function (option, ecModel) {
return createListFromArray(this.getSource(), this, {
generateCoord: 'value'
});
},
preventIncremental: function () {
var coordSysCreator = CoordinateSystem.get(this.get('coordinateSystem'));
if (coordSysCreator && coordSysCreator.dimensions) {
return coordSysCreator.dimensions[0] === 'lng' && coordSysCreator.dimensions[1] === 'lat';
}
},
defaultOption: {
// Cartesian2D or geo
coordinateSystem: 'cartesian2d',
zlevel: 0,
z: 2,
// Cartesian coordinate system
// xAxisIndex: 0,
// yAxisIndex: 0,
// Geo coordinate system
geoIndex: 0,
blurSize: 30,
pointSize: 20,
maxOpacity: 1,
minOpacity: 0
}
});
module.exports = _default;

281
node_modules/echarts/lib/chart/heatmap/HeatmapView.js generated vendored Normal file
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
var _config = require("../../config");
var __DEV__ = _config.__DEV__;
var echarts = require("../../echarts");
var graphic = require("../../util/graphic");
var HeatmapLayer = require("./HeatmapLayer");
var zrUtil = require("zrender/lib/core/util");
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
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';
}
var _default = 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;
}
});
});
this.group.removeAll();
this._incrementalDisplayable = null;
var coordSys = seriesModel.coordinateSystem;
if (coordSys.type === 'cartesian2d' || coordSys.type === 'calendar') {
this._renderOnCartesianAndCalendar(seriesModel, api, 0, seriesModel.getData().count());
} else if (isGeoCoordSys(coordSys)) {
this._renderOnGeo(coordSys, seriesModel, visualMapOfThisSeries, api);
}
},
incrementalPrepareRender: function (seriesModel, ecModel, api) {
this.group.removeAll();
},
incrementalRender: function (params, seriesModel, ecModel, api) {
var coordSys = seriesModel.coordinateSystem;
if (coordSys) {
this._renderOnCartesianAndCalendar(seriesModel, api, params.start, params.end, true);
}
},
_renderOnCartesianAndCalendar: function (seriesModel, api, start, end, incremental) {
var coordSys = seriesModel.coordinateSystem;
var width;
var height;
if (coordSys.type === 'cartesian2d') {
var xAxis = coordSys.getAxis('x');
var yAxis = coordSys.getAxis('y');
width = xAxis.getBandWidth();
height = yAxis.getBandWidth();
}
var group = this.group;
var data = seriesModel.getData();
var itemStyleQuery = 'itemStyle';
var hoverItemStyleQuery = 'emphasis.itemStyle';
var labelQuery = 'label';
var hoverLabelQuery = 'emphasis.label';
var style = seriesModel.getModel(itemStyleQuery).getItemStyle(['color']);
var hoverStl = seriesModel.getModel(hoverItemStyleQuery).getItemStyle();
var labelModel = seriesModel.getModel(labelQuery);
var hoverLabelModel = seriesModel.getModel(hoverLabelQuery);
var coordSysType = coordSys.type;
var dataDims = coordSysType === 'cartesian2d' ? [data.mapDimension('x'), data.mapDimension('y'), data.mapDimension('value')] : [data.mapDimension('time'), data.mapDimension('value')];
for (var idx = start; idx < end; idx++) {
var rect;
if (coordSysType === 'cartesian2d') {
// Ignore empty data
if (isNaN(data.get(dataDims[2], idx))) {
continue;
}
var point = coordSys.dataToPoint([data.get(dataDims[0], idx), data.get(dataDims[1], idx)]);
rect = new graphic.Rect({
shape: {
x: Math.floor(Math.round(point[0]) - width / 2),
y: Math.floor(Math.round(point[1]) - height / 2),
width: Math.ceil(width),
height: Math.ceil(height)
},
style: {
fill: data.getItemVisual(idx, 'color'),
opacity: data.getItemVisual(idx, 'opacity')
}
});
} else {
// Ignore empty data
if (isNaN(data.get(dataDims[1], idx))) {
continue;
}
rect = new graphic.Rect({
z2: 1,
shape: coordSys.dataToRect([data.get(dataDims[0], idx)]).contentShape,
style: {
fill: data.getItemVisual(idx, 'color'),
opacity: data.getItemVisual(idx, 'opacity')
}
});
}
var itemModel = data.getItemModel(idx); // 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];
}
graphic.setLabelStyle(style, hoverStl, labelModel, hoverLabelModel, {
labelFetcher: seriesModel,
labelDataIndex: idx,
defaultText: defaultText,
isRectText: true
});
rect.setStyle(style);
graphic.setHoverStyle(rect, data.hasItemOption ? hoverStl : zrUtil.extend({}, hoverStl));
rect.incremental = incremental; // PENDING
if (incremental) {
// Rect must use hover layer if it's incremental.
rect.useHoverLayer = true;
}
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();
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 dims = [data.mapDimension('lng'), data.mapDimension('lat'), data.mapDimension('value')];
var points = data.mapArray(dims, 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);
},
dispose: function () {}
});
module.exports = _default;