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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.
*/
import * as zrUtil from 'zrender/src/core/util';
import {parsePercent} from '../util/number';
import {isDimensionStacked} from '../data/helper/dataStackHelper';
function getSeriesStackId(seriesModel) {
return seriesModel.get('stack')
|| '__ec_stack_' + seriesModel.seriesIndex;
}
function getAxisKey(polar, axis) {
return axis.dim + polar.model.componentIndex;
}
/**
* @param {string} seriesType
* @param {module:echarts/model/Global} ecModel
* @param {module:echarts/ExtensionAPI} api
*/
function barLayoutPolar(seriesType, ecModel, api) {
var lastStackCoords = {};
var barWidthAndOffset = calRadialBar(
zrUtil.filter(
ecModel.getSeriesByType(seriesType),
function (seriesModel) {
return !ecModel.isSeriesFiltered(seriesModel)
&& seriesModel.coordinateSystem
&& seriesModel.coordinateSystem.type === 'polar';
}
)
);
ecModel.eachSeriesByType(seriesType, function (seriesModel) {
// Check series coordinate, do layout for polar only
if (seriesModel.coordinateSystem.type !== 'polar') {
return;
}
var data = seriesModel.getData();
var polar = seriesModel.coordinateSystem;
var baseAxis = polar.getBaseAxis();
var axisKey = getAxisKey(polar, baseAxis);
var stackId = getSeriesStackId(seriesModel);
var columnLayoutInfo = barWidthAndOffset[axisKey][stackId];
var columnOffset = columnLayoutInfo.offset;
var columnWidth = columnLayoutInfo.width;
var valueAxis = polar.getOtherAxis(baseAxis);
var cx = seriesModel.coordinateSystem.cx;
var cy = seriesModel.coordinateSystem.cy;
var barMinHeight = seriesModel.get('barMinHeight') || 0;
var barMinAngle = seriesModel.get('barMinAngle') || 0;
lastStackCoords[stackId] = lastStackCoords[stackId] || [];
var valueDim = data.mapDimension(valueAxis.dim);
var baseDim = data.mapDimension(baseAxis.dim);
var stacked = isDimensionStacked(data, valueDim /*, baseDim*/);
var clampLayout = baseAxis.dim !== 'radius'
|| !seriesModel.get('roundCap', true);
var valueAxisStart = valueAxis.dim === 'radius'
? valueAxis.dataToRadius(0)
: valueAxis.dataToAngle(0);
for (var idx = 0, len = data.count(); idx < len; idx++) {
var value = data.get(valueDim, idx);
var baseValue = data.get(baseDim, idx);
var sign = value >= 0 ? 'p' : 'n';
var baseCoord = valueAxisStart;
// Because of the barMinHeight, we can not use the value in
// stackResultDimension directly.
// Only ordinal axis can be stacked.
if (stacked) {
if (!lastStackCoords[stackId][baseValue]) {
lastStackCoords[stackId][baseValue] = {
p: valueAxisStart, // Positive stack
n: valueAxisStart // Negative stack
};
}
// Should also consider #4243
baseCoord = lastStackCoords[stackId][baseValue][sign];
}
var r0;
var r;
var startAngle;
var endAngle;
// radial sector
if (valueAxis.dim === 'radius') {
var radiusSpan = valueAxis.dataToRadius(value) - valueAxisStart;
var angle = baseAxis.dataToAngle(baseValue);
if (Math.abs(radiusSpan) < barMinHeight) {
radiusSpan = (radiusSpan < 0 ? -1 : 1) * barMinHeight;
}
r0 = baseCoord;
r = baseCoord + radiusSpan;
startAngle = angle - columnOffset;
endAngle = startAngle - columnWidth;
stacked && (lastStackCoords[stackId][baseValue][sign] = r);
}
// tangential sector
else {
var angleSpan = valueAxis.dataToAngle(value, clampLayout) - valueAxisStart;
var radius = baseAxis.dataToRadius(baseValue);
if (Math.abs(angleSpan) < barMinAngle) {
angleSpan = (angleSpan < 0 ? -1 : 1) * barMinAngle;
}
r0 = radius + columnOffset;
r = r0 + columnWidth;
startAngle = baseCoord;
endAngle = baseCoord + angleSpan;
// if the previous stack is at the end of the ring,
// add a round to differentiate it from origin
// var extent = angleAxis.getExtent();
// var stackCoord = angle;
// if (stackCoord === extent[0] && value > 0) {
// stackCoord = extent[1];
// }
// else if (stackCoord === extent[1] && value < 0) {
// stackCoord = extent[0];
// }
stacked && (lastStackCoords[stackId][baseValue][sign] = endAngle);
}
data.setItemLayout(idx, {
cx: cx,
cy: cy,
r0: r0,
r: r,
// Consider that positive angle is anti-clockwise,
// while positive radian of sector is clockwise
startAngle: -startAngle * Math.PI / 180,
endAngle: -endAngle * Math.PI / 180
});
}
}, this);
}
/**
* Calculate bar width and offset for radial bar charts
*/
function calRadialBar(barSeries, api) {
// Columns info on each category axis. Key is polar name
var columnsMap = {};
zrUtil.each(barSeries, function (seriesModel, idx) {
var data = seriesModel.getData();
var polar = seriesModel.coordinateSystem;
var baseAxis = polar.getBaseAxis();
var axisKey = getAxisKey(polar, baseAxis);
var axisExtent = baseAxis.getExtent();
var bandWidth = baseAxis.type === 'category'
? baseAxis.getBandWidth()
: (Math.abs(axisExtent[1] - axisExtent[0]) / data.count());
var columnsOnAxis = columnsMap[axisKey] || {
bandWidth: bandWidth,
remainedWidth: bandWidth,
autoWidthCount: 0,
categoryGap: '20%',
gap: '30%',
stacks: {}
};
var stacks = columnsOnAxis.stacks;
columnsMap[axisKey] = columnsOnAxis;
var stackId = getSeriesStackId(seriesModel);
if (!stacks[stackId]) {
columnsOnAxis.autoWidthCount++;
}
stacks[stackId] = stacks[stackId] || {
width: 0,
maxWidth: 0
};
var barWidth = parsePercent(
seriesModel.get('barWidth'),
bandWidth
);
var barMaxWidth = parsePercent(
seriesModel.get('barMaxWidth'),
bandWidth
);
var barGap = seriesModel.get('barGap');
var barCategoryGap = seriesModel.get('barCategoryGap');
if (barWidth && !stacks[stackId].width) {
barWidth = Math.min(columnsOnAxis.remainedWidth, barWidth);
stacks[stackId].width = barWidth;
columnsOnAxis.remainedWidth -= barWidth;
}
barMaxWidth && (stacks[stackId].maxWidth = barMaxWidth);
(barGap != null) && (columnsOnAxis.gap = barGap);
(barCategoryGap != null) && (columnsOnAxis.categoryGap = barCategoryGap);
});
var result = {};
zrUtil.each(columnsMap, function (columnsOnAxis, coordSysName) {
result[coordSysName] = {};
var stacks = columnsOnAxis.stacks;
var bandWidth = columnsOnAxis.bandWidth;
var categoryGap = parsePercent(columnsOnAxis.categoryGap, bandWidth);
var barGapPercent = parsePercent(columnsOnAxis.gap, 1);
var remainedWidth = columnsOnAxis.remainedWidth;
var autoWidthCount = columnsOnAxis.autoWidthCount;
var autoWidth = (remainedWidth - categoryGap)
/ (autoWidthCount + (autoWidthCount - 1) * barGapPercent);
autoWidth = Math.max(autoWidth, 0);
// Find if any auto calculated bar exceeded maxBarWidth
zrUtil.each(stacks, function (column, stack) {
var maxWidth = column.maxWidth;
if (maxWidth && maxWidth < autoWidth) {
maxWidth = Math.min(maxWidth, remainedWidth);
if (column.width) {
maxWidth = Math.min(maxWidth, column.width);
}
remainedWidth -= maxWidth;
column.width = maxWidth;
autoWidthCount--;
}
});
// Recalculate width again
autoWidth = (remainedWidth - categoryGap)
/ (autoWidthCount + (autoWidthCount - 1) * barGapPercent);
autoWidth = Math.max(autoWidth, 0);
var widthSum = 0;
var lastColumn;
zrUtil.each(stacks, function (column, idx) {
if (!column.width) {
column.width = autoWidth;
}
lastColumn = column;
widthSum += column.width * (1 + barGapPercent);
});
if (lastColumn) {
widthSum -= lastColumn.width * barGapPercent;
}
var offset = -widthSum / 2;
zrUtil.each(stacks, function (column, stackId) {
result[coordSysName][stackId] = result[coordSysName][stackId] || {
offset: offset,
width: column.width
};
offset += column.width * (1 + barGapPercent);
});
});
return result;
}
export default barLayoutPolar;