echarts Grid 源码
echarts Grid 代码
文件路径：/src/coord/cartesian/Grid.ts
/*
* 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.
*/
/**
* Grid is a region which contains at most 4 cartesian systems
*
* TODO Default cartesian
*/
import {isObject, each, indexOf, retrieve3, keys} from 'zrender/src/core/util';
import {getLayoutRect, LayoutRect} from '../../util/layout';
import {
createScaleByModel,
ifAxisCrossZero,
niceScaleExtent,
estimateLabelUnionRect,
getDataDimensionsOnAxis
} from '../../coord/axisHelper';
import Cartesian2D, {cartesian2DDimensions} from './Cartesian2D';
import Axis2D from './Axis2D';
import {ParsedModelFinder, ParsedModelFinderKnown, SINGLE_REFERRING} from '../../util/model';
// Depends on GridModel, AxisModel, which performs preprocess.
import GridModel from './GridModel';
import CartesianAxisModel from './AxisModel';
import GlobalModel from '../../model/Global';
import ExtensionAPI from '../../core/ExtensionAPI';
import { Dictionary } from 'zrender/src/core/types';
import {CoordinateSystemMaster} from '../CoordinateSystem';
import { ScaleDataValue } from '../../util/types';
import SeriesData from '../../data/SeriesData';
import OrdinalScale from '../../scale/Ordinal';
import { isCartesian2DSeries, findAxisModels } from './cartesianAxisHelper';
import { CategoryAxisBaseOption, NumericAxisBaseOptionCommon } from '../axisCommonTypes';
import { AxisBaseModel } from '../AxisBaseModel';
import { isIntervalOrLogScale } from '../../scale/helper';
import { alignScaleTicks } from '../axisAlignTicks';
import IntervalScale from '../../scale/Interval';
import LogScale from '../../scale/Log';
type Cartesian2DDimensionName = 'x' | 'y';
type FinderAxisIndex = {xAxisIndex?: number, yAxisIndex?: number};
type AxesMap = {
x: Axis2D[],
y: Axis2D[]
};
class Grid implements CoordinateSystemMaster {
// FIXME:TS where used (different from registered type 'cartesian2d')?
readonly type: string = 'grid';
private _coordsMap: Dictionary<Cartesian2D> = {};
private _coordsList: Cartesian2D[] = [];
private _axesMap: AxesMap = {} as AxesMap;
private _axesList: Axis2D[] = [];
private _rect: LayoutRect;
readonly model: GridModel;
readonly axisPointerEnabled = true;
// Injected:
name: string;
// For deciding which dimensions to use when creating list data
static dimensions = cartesian2DDimensions;
readonly dimensions = cartesian2DDimensions;
constructor(gridModel: GridModel, ecModel: GlobalModel, api: ExtensionAPI) {
this._initCartesian(gridModel, ecModel, api);
this.model = gridModel;
}
getRect(): LayoutRect {
return this._rect;
}
update(ecModel: GlobalModel, api: ExtensionAPI): void {
const axesMap = this._axesMap;
this._updateScale(ecModel, this.model);
function updateAxisTicks(axes: Record<number, Axis2D>) {
let alignTo: Axis2D;
// Axis is added in order of axisIndex.
const axesIndices = keys(axes);
const len = axesIndices.length;
if (!len) {
return;
}
const axisNeedsAlign: Axis2D[] = [];
// Process once and calculate the ticks for those don't use alignTicks.
for (let i = len - 1; i >= 0; i--) {
const idx = +axesIndices[i]; // Convert to number.
const axis = axes[idx];
const model = axis.model as AxisBaseModel<NumericAxisBaseOptionCommon>;
const scale = axis.scale;
if (// Only value and log axis without interval support alignTicks.
isIntervalOrLogScale(scale)
&& model.get('alignTicks')
&& model.get('interval') == null
) {
axisNeedsAlign.push(axis);
}
else {
niceScaleExtent(scale, model);
if (isIntervalOrLogScale(scale)) { // Can only align to interval or log axis.
alignTo = axis;
}
}
};
// All axes has set alignTicks. Pick the first one.
// PENDING. Should we find the axis that both set interval, min, max and align to this one?
if (axisNeedsAlign.length) {
if (!alignTo) {
alignTo = axisNeedsAlign.pop();
niceScaleExtent(alignTo.scale, alignTo.model);
}
each(axisNeedsAlign, axis => {
alignScaleTicks(
axis.scale as IntervalScale | LogScale,
axis.model,
alignTo.scale as IntervalScale | LogScale
);
});
}
}
updateAxisTicks(axesMap.x);
updateAxisTicks(axesMap.y);
// Key: axisDim_axisIndex, value: boolean, whether onZero target.
const onZeroRecords = {} as Dictionary<boolean>;
each(axesMap.x, function (xAxis) {
fixAxisOnZero(axesMap, 'y', xAxis, onZeroRecords);
});
each(axesMap.y, function (yAxis) {
fixAxisOnZero(axesMap, 'x', yAxis, onZeroRecords);
});
// Resize again if containLabel is enabled
// FIXME It may cause getting wrong grid size in data processing stage
this.resize(this.model, api);
}
/**
* Resize the grid
*/
resize(gridModel: GridModel, api: ExtensionAPI, ignoreContainLabel?: boolean): void {
const boxLayoutParams = gridModel.getBoxLayoutParams();
const isContainLabel = !ignoreContainLabel && gridModel.get('containLabel');
const gridRect = getLayoutRect(
boxLayoutParams, {
width: api.getWidth(),
height: api.getHeight()
});
this._rect = gridRect;
const axesList = this._axesList;
adjustAxes();
// Minus label size
if (isContainLabel) {
each(axesList, function (axis) {
if (!axis.model.get(['axisLabel', 'inside'])) {
const labelUnionRect = estimateLabelUnionRect(axis);
if (labelUnionRect) {
const dim: 'height' | 'width' = axis.isHorizontal() ? 'height' : 'width';
const margin = axis.model.get(['axisLabel', 'margin']);
gridRect[dim] -= labelUnionRect[dim] + margin;
if (axis.position === 'top') {
gridRect.y += labelUnionRect.height + margin;
}
else if (axis.position === 'left') {
gridRect.x += labelUnionRect.width + margin;
}
}
}
});
adjustAxes();
}
each(this._coordsList, function (coord) {
// Calculate affine matrix to accelerate the data to point transform.
// If all the axes scales are time or value.
coord.calcAffineTransform();
});
function adjustAxes() {
each(axesList, function (axis) {
const isHorizontal = axis.isHorizontal();
const extent = isHorizontal ? [0, gridRect.width] : [0, gridRect.height];
const idx = axis.inverse ? 1 : 0;
axis.setExtent(extent[idx], extent[1 - idx]);
updateAxisTransform(axis, isHorizontal ? gridRect.x : gridRect.y);
});
}
}
getAxis(dim: Cartesian2DDimensionName, axisIndex?: number): Axis2D {
const axesMapOnDim = this._axesMap[dim];
if (axesMapOnDim != null) {
return axesMapOnDim[axisIndex || 0];
}
}
getAxes(): Axis2D[] {
return this._axesList.slice();
}
/**
* Usage:
* grid.getCartesian(xAxisIndex, yAxisIndex);
* grid.getCartesian(xAxisIndex);
* grid.getCartesian(null, yAxisIndex);
* grid.getCartesian({xAxisIndex: ..., yAxisIndex: ...});
*
* When only xAxisIndex or yAxisIndex given, find its first cartesian.
*/
getCartesian(finder: FinderAxisIndex): Cartesian2D;
getCartesian(xAxisIndex?: number, yAxisIndex?: number): Cartesian2D;
getCartesian(xAxisIndex?: number | FinderAxisIndex, yAxisIndex?: number) {
if (xAxisIndex != null && yAxisIndex != null) {
const key = 'x' + xAxisIndex + 'y' + yAxisIndex;
return this._coordsMap[key];
}
if (isObject(xAxisIndex)) {
yAxisIndex = (xAxisIndex as FinderAxisIndex).yAxisIndex;
xAxisIndex = (xAxisIndex as FinderAxisIndex).xAxisIndex;
}
for (let i = 0, coordList = this._coordsList; i < coordList.length; i++) {
if (coordList[i].getAxis('x').index === xAxisIndex
|| coordList[i].getAxis('y').index === yAxisIndex
) {
return coordList[i];
}
}
}
getCartesians(): Cartesian2D[] {
return this._coordsList.slice();
}
/**
* @implements
*/
convertToPixel(
ecModel: GlobalModel, finder: ParsedModelFinder, value: ScaleDataValue | ScaleDataValue[]
): number | number[] {
const target = this._findConvertTarget(finder);
return target.cartesian
? target.cartesian.dataToPoint(value as ScaleDataValue[])
: target.axis
? target.axis.toGlobalCoord(target.axis.dataToCoord(value as ScaleDataValue))
: null;
}
/**
* @implements
*/
convertFromPixel(
ecModel: GlobalModel, finder: ParsedModelFinder, value: number | number[]
): number | number[] {
const target = this._findConvertTarget(finder);
return target.cartesian
? target.cartesian.pointToData(value as number[])
: target.axis
? target.axis.coordToData(target.axis.toLocalCoord(value as number))
: null;
}
private _findConvertTarget(finder: ParsedModelFinderKnown): {
cartesian: Cartesian2D,
axis: Axis2D
} {
const seriesModel = finder.seriesModel;
const xAxisModel = finder.xAxisModel
|| (seriesModel && seriesModel.getReferringComponents('xAxis', SINGLE_REFERRING).models[0]);
const yAxisModel = finder.yAxisModel
|| (seriesModel && seriesModel.getReferringComponents('yAxis', SINGLE_REFERRING).models[0]);
const gridModel = finder.gridModel;
const coordsList = this._coordsList;
let cartesian: Cartesian2D;
let axis;
if (seriesModel) {
cartesian = seriesModel.coordinateSystem as Cartesian2D;
indexOf(coordsList, cartesian) < 0 && (cartesian = null);
}
else if (xAxisModel && yAxisModel) {
cartesian = this.getCartesian(xAxisModel.componentIndex, yAxisModel.componentIndex);
}
else if (xAxisModel) {
axis = this.getAxis('x', xAxisModel.componentIndex);
}
else if (yAxisModel) {
axis = this.getAxis('y', yAxisModel.componentIndex);
}
// Lowest priority.
else if (gridModel) {
const grid = gridModel.coordinateSystem;
if (grid === this) {
cartesian = this._coordsList[0];
}
}
return {cartesian: cartesian, axis: axis};
}
/**
* @implements
*/
containPoint(point: number[]): boolean {
const coord = this._coordsList[0];
if (coord) {
return coord.containPoint(point);
}
}
/**
* Initialize cartesian coordinate systems
*/
private _initCartesian(
gridModel: GridModel, ecModel: GlobalModel, api: ExtensionAPI
): void {
const grid = this;
const axisPositionUsed = {
left: false,
right: false,
top: false,
bottom: false
};
const axesMap = {
x: {},
y: {}
} as AxesMap;
const axesCount = {
x: 0,
y: 0
};
// Create axis
ecModel.eachComponent('xAxis', createAxisCreator('x'), this);
ecModel.eachComponent('yAxis', createAxisCreator('y'), this);
if (!axesCount.x || !axesCount.y) {
// Roll back when there no either x or y axis
this._axesMap = {} as AxesMap;
this._axesList = [];
return;
}
this._axesMap = axesMap;
// Create cartesian2d
each(axesMap.x, (xAxis, xAxisIndex) => {
each(axesMap.y, (yAxis, yAxisIndex) => {
const key = 'x' + xAxisIndex + 'y' + yAxisIndex;
const cartesian = new Cartesian2D(key);
cartesian.master = this;
cartesian.model = gridModel;
this._coordsMap[key] = cartesian;
this._coordsList.push(cartesian);
cartesian.addAxis(xAxis);
cartesian.addAxis(yAxis);
});
});
function createAxisCreator(dimName: Cartesian2DDimensionName) {
return function (axisModel: CartesianAxisModel, idx: number): void {
if (!isAxisUsedInTheGrid(axisModel, gridModel)) {
return;
}
let axisPosition = axisModel.get('position');
if (dimName === 'x') {
// Fix position
if (axisPosition !== 'top' && axisPosition !== 'bottom') {
// Default bottom of X
axisPosition = axisPositionUsed.bottom ? 'top' : 'bottom';
}
}
else {
// Fix position
if (axisPosition !== 'left' && axisPosition !== 'right') {
// Default left of Y
axisPosition = axisPositionUsed.left ? 'right' : 'left';
}
}
axisPositionUsed[axisPosition] = true;
const axis = new Axis2D(
dimName,
createScaleByModel(axisModel),
[0, 0],
axisModel.get('type'),
axisPosition
);
const isCategory = axis.type === 'category';
axis.onBand = isCategory && (axisModel as AxisBaseModel<CategoryAxisBaseOption>).get('boundaryGap');
axis.inverse = axisModel.get('inverse');
// Inject axis into axisModel
axisModel.axis = axis;
// Inject axisModel into axis
axis.model = axisModel;
// Inject grid info axis
axis.grid = grid;
// Index of axis, can be used as key
axis.index = idx;
grid._axesList.push(axis);
axesMap[dimName][idx] = axis;
axesCount[dimName]++;
};
}
}
/**
* Update cartesian properties from series.
*/
private _updateScale(ecModel: GlobalModel, gridModel: GridModel): void {
// Reset scale
each(this._axesList, function (axis) {
axis.scale.setExtent(Infinity, -Infinity);
if (axis.type === 'category') {
const categorySortInfo = axis.model.get('categorySortInfo');
(axis.scale as OrdinalScale).setSortInfo(categorySortInfo);
}
});
ecModel.eachSeries(function (seriesModel) {
if (isCartesian2DSeries(seriesModel)) {
const axesModelMap = findAxisModels(seriesModel);
const xAxisModel = axesModelMap.xAxisModel;
const yAxisModel = axesModelMap.yAxisModel;
if (!isAxisUsedInTheGrid(xAxisModel, gridModel)
|| !isAxisUsedInTheGrid(yAxisModel, gridModel)
) {
return;
}
const cartesian = this.getCartesian(
xAxisModel.componentIndex, yAxisModel.componentIndex
);
const data = seriesModel.getData();
const xAxis = cartesian.getAxis('x');
const yAxis = cartesian.getAxis('y');
unionExtent(data, xAxis);
unionExtent(data, yAxis);
}
}, this);
function unionExtent(data: SeriesData, axis: Axis2D): void {
each(getDataDimensionsOnAxis(data, axis.dim), function (dim) {
axis.scale.unionExtentFromData(data, dim);
});
}
}
/**
* @param dim 'x' or 'y' or 'auto' or null/undefined
*/
getTooltipAxes(dim: Cartesian2DDimensionName | 'auto'): {
baseAxes: Axis2D[], otherAxes: Axis2D[]
} {
const baseAxes = [] as Axis2D[];
const otherAxes = [] as Axis2D[];
each(this.getCartesians(), function (cartesian) {
const baseAxis = (dim != null && dim !== 'auto')
? cartesian.getAxis(dim) : cartesian.getBaseAxis();
const otherAxis = cartesian.getOtherAxis(baseAxis);
indexOf(baseAxes, baseAxis) < 0 && baseAxes.push(baseAxis);
indexOf(otherAxes, otherAxis) < 0 && otherAxes.push(otherAxis);
});
return {baseAxes: baseAxes, otherAxes: otherAxes};
}
static create(ecModel: GlobalModel, api: ExtensionAPI): Grid[] {
const grids = [] as Grid[];
ecModel.eachComponent('grid', function (gridModel: GridModel, idx) {
const grid = new Grid(gridModel, ecModel, api);
grid.name = 'grid_' + idx;
// dataSampling requires axis extent, so resize
// should be performed in create stage.
grid.resize(gridModel, api, true);
gridModel.coordinateSystem = grid;
grids.push(grid);
});
// Inject the coordinateSystems into seriesModel
ecModel.eachSeries(function (seriesModel) {
if (!isCartesian2DSeries(seriesModel)) {
return;
}
const axesModelMap = findAxisModels(seriesModel);
const xAxisModel = axesModelMap.xAxisModel;
const yAxisModel = axesModelMap.yAxisModel;
const gridModel = xAxisModel.getCoordSysModel();
if (__DEV__) {
if (!gridModel) {
throw new Error(
'Grid "' + retrieve3(
xAxisModel.get('gridIndex'),
xAxisModel.get('gridId'),
0
) + '" not found'
);
}
if (xAxisModel.getCoordSysModel() !== yAxisModel.getCoordSysModel()) {
throw new Error('xAxis and yAxis must use the same grid');
}
}
const grid = gridModel.coordinateSystem as Grid;
seriesModel.coordinateSystem = grid.getCartesian(
xAxisModel.componentIndex, yAxisModel.componentIndex
);
});
return grids;
}
}
/**
* Check if the axis is used in the specified grid.
*/
function isAxisUsedInTheGrid(axisModel: CartesianAxisModel, gridModel: GridModel): boolean {
return axisModel.getCoordSysModel() === gridModel;
}
function fixAxisOnZero(
axesMap: AxesMap,
otherAxisDim: Cartesian2DDimensionName,
axis: Axis2D,
// Key: see `getOnZeroRecordKey`
onZeroRecords: Dictionary<boolean>
): void {
axis.getAxesOnZeroOf = function () {
// TODO: onZero of multiple axes.
return otherAxisOnZeroOf ? [otherAxisOnZeroOf] : [];
};
// onZero can not be enabled in these two situations:
// 1. When any other axis is a category axis.
// 2. When no axis is cross 0 point.
const otherAxes = axesMap[otherAxisDim];
let otherAxisOnZeroOf: Axis2D;
const axisModel = axis.model;
const onZero = axisModel.get(['axisLine', 'onZero']);
const onZeroAxisIndex = axisModel.get(['axisLine', 'onZeroAxisIndex']);
if (!onZero) {
return;
}
// If target axis is specified.
if (onZeroAxisIndex != null) {
if (canOnZeroToAxis(otherAxes[onZeroAxisIndex])) {
otherAxisOnZeroOf = otherAxes[onZeroAxisIndex];
}
}
else {
// Find the first available other axis.
for (const idx in otherAxes) {
if (otherAxes.hasOwnProperty(idx)
&& canOnZeroToAxis(otherAxes[idx])
// Consider that two Y axes on one value axis,
// if both onZero, the two Y axes overlap.
&& !onZeroRecords[getOnZeroRecordKey(otherAxes[idx])]
) {
otherAxisOnZeroOf = otherAxes[idx];
break;
}
}
}
if (otherAxisOnZeroOf) {
onZeroRecords[getOnZeroRecordKey(otherAxisOnZeroOf)] = true;
}
function getOnZeroRecordKey(axis: Axis2D) {
return axis.dim + '_' + axis.index;
}
}
function canOnZeroToAxis(axis: Axis2D): boolean {
return axis && axis.type !== 'category' && axis.type !== 'time' && ifAxisCrossZero(axis);
}
function updateAxisTransform(axis: Axis2D, coordBase: number) {
const axisExtent = axis.getExtent();
const axisExtentSum = axisExtent[0] + axisExtent[1];
// Fast transform
axis.toGlobalCoord = axis.dim === 'x'
? function (coord) {
return coord + coordBase;
}
: function (coord) {
return axisExtentSum - coord + coordBase;
};
axis.toLocalCoord = axis.dim === 'x'
? function (coord) {
return coord - coordBase;
}
: function (coord) {
return axisExtentSum - coord + coordBase;
};
}
export default Grid;
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