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frontend/node_modules/echarts/lib/chart/themeRiver/themeRiverLayout.js

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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.
+*/
+
+
+/**
+ * AUTO-GENERATED FILE. DO NOT MODIFY.
+ */
+
+/*
+* 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/lib/core/util.js';
+import * as numberUtil from '../../util/number.js';
+export default function themeRiverLayout(ecModel, api) {
+  ecModel.eachSeriesByType('themeRiver', function (seriesModel) {
+    var data = seriesModel.getData();
+    var single = seriesModel.coordinateSystem;
+    var layoutInfo = {};
+    // use the axis boundingRect for view
+    var rect = single.getRect();
+    layoutInfo.rect = rect;
+    var boundaryGap = seriesModel.get('boundaryGap');
+    var axis = single.getAxis();
+    layoutInfo.boundaryGap = boundaryGap;
+    if (axis.orient === 'horizontal') {
+      boundaryGap[0] = numberUtil.parsePercent(boundaryGap[0], rect.height);
+      boundaryGap[1] = numberUtil.parsePercent(boundaryGap[1], rect.height);
+      var height = rect.height - boundaryGap[0] - boundaryGap[1];
+      doThemeRiverLayout(data, seriesModel, height);
+    } else {
+      boundaryGap[0] = numberUtil.parsePercent(boundaryGap[0], rect.width);
+      boundaryGap[1] = numberUtil.parsePercent(boundaryGap[1], rect.width);
+      var width = rect.width - boundaryGap[0] - boundaryGap[1];
+      doThemeRiverLayout(data, seriesModel, width);
+    }
+    data.setLayout('layoutInfo', layoutInfo);
+  });
+}
+/**
+ * The layout information about themeriver
+ *
+ * @param data  data in the series
+ * @param seriesModel  the model object of themeRiver series
+ * @param height  value used to compute every series height
+ */
+function doThemeRiverLayout(data, seriesModel, height) {
+  if (!data.count()) {
+    return;
+  }
+  var coordSys = seriesModel.coordinateSystem;
+  // the data in each layer are organized into a series.
+  var layerSeries = seriesModel.getLayerSeries();
+  // the points in each layer.
+  var timeDim = data.mapDimension('single');
+  var valueDim = data.mapDimension('value');
+  var layerPoints = zrUtil.map(layerSeries, function (singleLayer) {
+    return zrUtil.map(singleLayer.indices, function (idx) {
+      var pt = coordSys.dataToPoint(data.get(timeDim, idx));
+      pt[1] = data.get(valueDim, idx);
+      return pt;
+    });
+  });
+  var base = computeBaseline(layerPoints);
+  var baseLine = base.y0;
+  var ky = height / base.max;
+  // set layout information for each item.
+  var n = layerSeries.length;
+  var m = layerSeries[0].indices.length;
+  var baseY0;
+  for (var j = 0; j < m; ++j) {
+    baseY0 = baseLine[j] * ky;
+    data.setItemLayout(layerSeries[0].indices[j], {
+      layerIndex: 0,
+      x: layerPoints[0][j][0],
+      y0: baseY0,
+      y: layerPoints[0][j][1] * ky
+    });
+    for (var i = 1; i < n; ++i) {
+      baseY0 += layerPoints[i - 1][j][1] * ky;
+      data.setItemLayout(layerSeries[i].indices[j], {
+        layerIndex: i,
+        x: layerPoints[i][j][0],
+        y0: baseY0,
+        y: layerPoints[i][j][1] * ky
+      });
+    }
+  }
+}
+/**
+ * Compute the baseLine of the rawdata
+ * Inspired by Lee Byron's paper Stacked Graphs - Geometry & Aesthetics
+ *
+ * @param  data  the points in each layer
+ */
+function computeBaseline(data) {
+  var layerNum = data.length;
+  var pointNum = data[0].length;
+  var sums = [];
+  var y0 = [];
+  var max = 0;
+  for (var i = 0; i < pointNum; ++i) {
+    var temp = 0;
+    for (var j = 0; j < layerNum; ++j) {
+      temp += data[j][i][1];
+    }
+    if (temp > max) {
+      max = temp;
+    }
+    sums.push(temp);
+  }
+  for (var k = 0; k < pointNum; ++k) {
+    y0[k] = (max - sums[k]) / 2;
+  }
+  max = 0;
+  for (var l = 0; l < pointNum; ++l) {
+    var sum = sums[l] + y0[l];
+    if (sum > max) {
+      max = sum;
+    }
+  }
+  return {
+    y0: y0,
+    max: max
+  };
+}