echarts SliderZoomView 源码
echarts SliderZoomView 代码
文件路径：/src/component/dataZoom/SliderZoomView.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.
*/
import {bind, each, isFunction, isString, indexOf} from 'zrender/src/core/util';
import * as eventTool from 'zrender/src/core/event';
import * as graphic from '../../util/graphic';
import * as throttle from '../../util/throttle';
import DataZoomView from './DataZoomView';
import {linearMap, asc, parsePercent} from '../../util/number';
import * as layout from '../../util/layout';
import sliderMove from '../helper/sliderMove';
import GlobalModel from '../../model/Global';
import ExtensionAPI from '../../core/ExtensionAPI';
import {
LayoutOrient, Payload, ZRTextVerticalAlign, ZRTextAlign, ZRElementEvent, ParsedValue
} from '../../util/types';
import SliderZoomModel from './SliderZoomModel';
import { RectLike } from 'zrender/src/core/BoundingRect';
import Axis from '../../coord/Axis';
import SeriesModel from '../../model/Series';
import { AxisBaseModel } from '../../coord/AxisBaseModel';
import { getAxisMainType, collectReferCoordSysModelInfo } from './helper';
import { enableHoverEmphasis } from '../../util/states';
import { createSymbol, symbolBuildProxies } from '../../util/symbol';
import { deprecateLog } from '../../util/log';
import { PointLike } from 'zrender/src/core/Point';
import Displayable from 'zrender/src/graphic/Displayable';
import {createTextStyle} from '../../label/labelStyle';
import SeriesData from '../../data/SeriesData';
const Rect = graphic.Rect;
// Constants
const DEFAULT_LOCATION_EDGE_GAP = 7;
const DEFAULT_FRAME_BORDER_WIDTH = 1;
const DEFAULT_FILLER_SIZE = 30;
const DEFAULT_MOVE_HANDLE_SIZE = 7;
const HORIZONTAL = 'horizontal';
const VERTICAL = 'vertical';
const LABEL_GAP = 5;
const SHOW_DATA_SHADOW_SERIES_TYPE = ['line', 'bar', 'candlestick', 'scatter'];
const REALTIME_ANIMATION_CONFIG = {
easing: 'cubicOut',
duration: 100,
delay: 0
} as const;
// const NORMAL_ANIMATION_CONFIG = {
// easing: 'cubicInOut',
// duration: 200
// } as const;
interface Displayables {
sliderGroup: graphic.Group;
handles: [graphic.Path, graphic.Path];
handleLabels: [graphic.Text, graphic.Text];
dataShadowSegs: graphic.Group[];
filler: graphic.Rect;
brushRect: graphic.Rect;
moveHandle: graphic.Rect;
moveHandleIcon: graphic.Path;
// invisible move zone.
moveZone: graphic.Rect;
}
class SliderZoomView extends DataZoomView {
static type = 'dataZoom.slider';
type = SliderZoomView.type;
dataZoomModel: SliderZoomModel;
private _displayables = {} as Displayables;
private _orient: LayoutOrient;
private _range: number[];
/**
* [coord of the first handle, coord of the second handle]
*/
private _handleEnds: number[];
/**
* [length, thick]
*/
private _size: number[];
private _handleWidth: number;
private _handleHeight: number;
private _location: PointLike;
private _brushStart: PointLike;
private _brushStartTime: number;
private _dragging: boolean;
private _brushing: boolean;
private _dataShadowInfo: {
thisAxis: Axis
series: SeriesModel
thisDim: string
otherDim: string
otherAxisInverse: boolean
};
// Cached raw data. Avoid rendering data shadow multiple times.
private _shadowData: SeriesData;
private _shadowDim: string;
private _shadowSize: number[];
private _shadowPolygonPts: number[][];
private _shadowPolylinePts: number[][];
init(ecModel: GlobalModel, api: ExtensionAPI) {
this.api = api;
// A unique handler for each dataZoom component
this._onBrush = bind(this._onBrush, this);
this._onBrushEnd = bind(this._onBrushEnd, this);
}
render(
dataZoomModel: SliderZoomModel,
ecModel: GlobalModel,
api: ExtensionAPI,
payload: Payload & {
from: string
type: string
}
) {
super.render.apply(this, arguments as any);
throttle.createOrUpdate(
this,
'_dispatchZoomAction',
dataZoomModel.get('throttle'),
'fixRate'
);
this._orient = dataZoomModel.getOrient();
if (dataZoomModel.get('show') === false) {
this.group.removeAll();
return;
}
if (dataZoomModel.noTarget()) {
this._clear();
this.group.removeAll();
return;
}
// Notice: this._resetInterval() should not be executed when payload.type
// is 'dataZoom', origin this._range should be maintained, otherwise 'pan'
// or 'zoom' info will be missed because of 'throttle' of this.dispatchAction,
if (!payload || payload.type !== 'dataZoom' || payload.from !== this.uid) {
this._buildView();
}
this._updateView();
}
dispose() {
this._clear();
super.dispose.apply(this, arguments as any);
}
private _clear() {
throttle.clear(this, '_dispatchZoomAction');
const zr = this.api.getZr();
zr.off('mousemove', this._onBrush);
zr.off('mouseup', this._onBrushEnd);
}
private _buildView() {
const thisGroup = this.group;
thisGroup.removeAll();
this._brushing = false;
this._displayables.brushRect = null;
this._resetLocation();
this._resetInterval();
const barGroup = this._displayables.sliderGroup = new graphic.Group();
this._renderBackground();
this._renderHandle();
this._renderDataShadow();
thisGroup.add(barGroup);
this._positionGroup();
}
private _resetLocation() {
const dataZoomModel = this.dataZoomModel;
const api = this.api;
const showMoveHandle = dataZoomModel.get('brushSelect');
const moveHandleSize = showMoveHandle ? DEFAULT_MOVE_HANDLE_SIZE : 0;
// If some of x/y/width/height are not specified,
// auto-adapt according to target grid.
const coordRect = this._findCoordRect();
const ecSize = {width: api.getWidth(), height: api.getHeight()};
// Default align by coordinate system rect.
const positionInfo = this._orient === HORIZONTAL
? {
// Why using 'right', because right should be used in vertical,
// and it is better to be consistent for dealing with position param merge.
right: ecSize.width - coordRect.x - coordRect.width,
top: (ecSize.height - DEFAULT_FILLER_SIZE - DEFAULT_LOCATION_EDGE_GAP - moveHandleSize),
width: coordRect.width,
height: DEFAULT_FILLER_SIZE
}
: { // vertical
right: DEFAULT_LOCATION_EDGE_GAP,
top: coordRect.y,
width: DEFAULT_FILLER_SIZE,
height: coordRect.height
};
// Do not write back to option and replace value 'ph', because
// the 'ph' value should be recalculated when resize.
const layoutParams = layout.getLayoutParams(dataZoomModel.option);
// Replace the placeholder value.
each(['right', 'top', 'width', 'height'] as const, function (name) {
if (layoutParams[name] === 'ph') {
layoutParams[name] = positionInfo[name];
}
});
const layoutRect = layout.getLayoutRect(
layoutParams,
ecSize
);
this._location = {x: layoutRect.x, y: layoutRect.y};
this._size = [layoutRect.width, layoutRect.height];
this._orient === VERTICAL && this._size.reverse();
}
private _positionGroup() {
const thisGroup = this.group;
const location = this._location;
const orient = this._orient;
// Just use the first axis to determine mapping.
const targetAxisModel = this.dataZoomModel.getFirstTargetAxisModel();
const inverse = targetAxisModel && targetAxisModel.get('inverse');
const sliderGroup = this._displayables.sliderGroup;
const otherAxisInverse = (this._dataShadowInfo || {}).otherAxisInverse;
// Transform barGroup.
sliderGroup.attr(
(orient === HORIZONTAL && !inverse)
? {scaleY: otherAxisInverse ? 1 : -1, scaleX: 1 }
: (orient === HORIZONTAL && inverse)
? {scaleY: otherAxisInverse ? 1 : -1, scaleX: -1 }
: (orient === VERTICAL && !inverse)
? {scaleY: otherAxisInverse ? -1 : 1, scaleX: 1, rotation: Math.PI / 2}
// Dont use Math.PI, considering shadow direction.
: {scaleY: otherAxisInverse ? -1 : 1, scaleX: -1, rotation: Math.PI / 2}
);
// Position barGroup
const rect = thisGroup.getBoundingRect([sliderGroup]);
thisGroup.x = location.x - rect.x;
thisGroup.y = location.y - rect.y;
thisGroup.markRedraw();
}
private _getViewExtent() {
return [0, this._size[0]];
}
private _renderBackground() {
const dataZoomModel = this.dataZoomModel;
const size = this._size;
const barGroup = this._displayables.sliderGroup;
const brushSelect = dataZoomModel.get('brushSelect');
barGroup.add(new Rect({
silent: true,
shape: {
x: 0, y: 0, width: size[0], height: size[1]
},
style: {
fill: dataZoomModel.get('backgroundColor')
},
z2: -40
}));
// Click panel, over shadow, below handles.
const clickPanel = new Rect({
shape: {
x: 0, y: 0, width: size[0], height: size[1]
},
style: {
fill: 'transparent'
},
z2: 0,
onclick: bind(this._onClickPanel, this)
});
const zr = this.api.getZr();
if (brushSelect) {
clickPanel.on('mousedown', this._onBrushStart, this);
clickPanel.cursor = 'crosshair';
zr.on('mousemove', this._onBrush);
zr.on('mouseup', this._onBrushEnd);
}
else {
zr.off('mousemove', this._onBrush);
zr.off('mouseup', this._onBrushEnd);
}
barGroup.add(clickPanel);
}
private _renderDataShadow() {
const info = this._dataShadowInfo = this._prepareDataShadowInfo();
this._displayables.dataShadowSegs = [];
if (!info) {
return;
}
const size = this._size;
const oldSize = this._shadowSize || [];
const seriesModel = info.series;
const data = seriesModel.getRawData();
const candlestickDim = seriesModel.getShadowDim && seriesModel.getShadowDim();
const otherDim: string = candlestickDim && data.getDimensionInfo(candlestickDim)
? seriesModel.getShadowDim() // @see candlestick
: info.otherDim;
if (otherDim == null) {
return;
}
let polygonPts = this._shadowPolygonPts;
let polylinePts = this._shadowPolylinePts;
// Not re-render if data doesn't change.
if (
data !== this._shadowData || otherDim !== this._shadowDim
|| size[0] !== oldSize[0] || size[1] !== oldSize[1]
) {
let otherDataExtent = data.getDataExtent(otherDim);
// Nice extent.
const otherOffset = (otherDataExtent[1] - otherDataExtent[0]) * 0.3;
otherDataExtent = [
otherDataExtent[0] - otherOffset,
otherDataExtent[1] + otherOffset
];
const otherShadowExtent = [0, size[1]];
const thisShadowExtent = [0, size[0]];
const areaPoints = [[size[0], 0], [0, 0]];
const linePoints: number[][] = [];
const step = thisShadowExtent[1] / (data.count() - 1);
let thisCoord = 0;
// Optimize for large data shadow
const stride = Math.round(data.count() / size[0]);
let lastIsEmpty: boolean;
data.each([otherDim], function (value: ParsedValue, index) {
if (stride > 0 && (index % stride)) {
thisCoord += step;
return;
}
// FIXME
// Should consider axis.min/axis.max when drawing dataShadow.
// FIXME
// 应该使用统一的空判断？还是在list里进行空判断？
const isEmpty = value == null || isNaN(value as number) || value === '';
// See #4235.
const otherCoord = isEmpty
? 0 : linearMap(value as number, otherDataExtent, otherShadowExtent, true);
// Attempt to draw data shadow precisely when there are empty value.
if (isEmpty && !lastIsEmpty && index) {
areaPoints.push([areaPoints[areaPoints.length - 1][0], 0]);
linePoints.push([linePoints[linePoints.length - 1][0], 0]);
}
else if (!isEmpty && lastIsEmpty) {
areaPoints.push([thisCoord, 0]);
linePoints.push([thisCoord, 0]);
}
areaPoints.push([thisCoord, otherCoord]);
linePoints.push([thisCoord, otherCoord]);
thisCoord += step;
lastIsEmpty = isEmpty;
});
polygonPts = this._shadowPolygonPts = areaPoints;
polylinePts = this._shadowPolylinePts = linePoints;
}
this._shadowData = data;
this._shadowDim = otherDim;
this._shadowSize = [size[0], size[1]];
const dataZoomModel = this.dataZoomModel;
function createDataShadowGroup(isSelectedArea?: boolean) {
const model = dataZoomModel.getModel(isSelectedArea ? 'selectedDataBackground' : 'dataBackground');
const group = new graphic.Group();
const polygon = new graphic.Polygon({
shape: {points: polygonPts},
segmentIgnoreThreshold: 1,
style: model.getModel('areaStyle').getAreaStyle(),
silent: true,
z2: -20
});
const polyline = new graphic.Polyline({
shape: {points: polylinePts},
segmentIgnoreThreshold: 1,
style: model.getModel('lineStyle').getLineStyle(),
silent: true,
z2: -19
});
group.add(polygon);
group.add(polyline);
return group;
}
// let dataBackgroundModel = dataZoomModel.getModel('dataBackground');
for (let i = 0; i < 3; i++) {
const group = createDataShadowGroup(i === 1);
this._displayables.sliderGroup.add(group);
this._displayables.dataShadowSegs.push(group);
}
}
private _prepareDataShadowInfo() {
const dataZoomModel = this.dataZoomModel;
const showDataShadow = dataZoomModel.get('showDataShadow');
if (showDataShadow === false) {
return;
}
// Find a representative series.
let result: SliderZoomView['_dataShadowInfo'];
const ecModel = this.ecModel;
dataZoomModel.eachTargetAxis(function (axisDim, axisIndex) {
const seriesModels = dataZoomModel
.getAxisProxy(axisDim, axisIndex)
.getTargetSeriesModels();
each(seriesModels, function (seriesModel) {
if (result) {
return;
}
if (showDataShadow !== true && indexOf(
SHOW_DATA_SHADOW_SERIES_TYPE, seriesModel.get('type')
) < 0
) {
return;
}
const thisAxis = (
ecModel.getComponent(getAxisMainType(axisDim), axisIndex) as AxisBaseModel
).axis;
let otherDim = getOtherDim(axisDim);
let otherAxisInverse;
const coordSys = seriesModel.coordinateSystem;
if (otherDim != null && coordSys.getOtherAxis) {
otherAxisInverse = coordSys.getOtherAxis(thisAxis).inverse;
}
otherDim = seriesModel.getData().mapDimension(otherDim);
result = {
thisAxis: thisAxis,
series: seriesModel,
thisDim: axisDim,
otherDim: otherDim,
otherAxisInverse: otherAxisInverse
};
}, this);
}, this);
return result;
}
private _renderHandle() {
const thisGroup = this.group;
const displayables = this._displayables;
const handles: [graphic.Path, graphic.Path] = displayables.handles = [null, null];
const handleLabels: [graphic.Text, graphic.Text] = displayables.handleLabels = [null, null];
const sliderGroup = this._displayables.sliderGroup;
const size = this._size;
const dataZoomModel = this.dataZoomModel;
const api = this.api;
const borderRadius = dataZoomModel.get('borderRadius') || 0;
const brushSelect = dataZoomModel.get('brushSelect');
const filler = displayables.filler = new Rect({
silent: brushSelect,
style: {
fill: dataZoomModel.get('fillerColor')
},
textConfig: {
position: 'inside'
}
});
sliderGroup.add(filler);
// Frame border.
sliderGroup.add(new Rect({
silent: true,
subPixelOptimize: true,
shape: {
x: 0,
y: 0,
width: size[0],
height: size[1],
r: borderRadius
},
style: {
// deprecated option
stroke: dataZoomModel.get('dataBackgroundColor' as any)
|| dataZoomModel.get('borderColor'),
lineWidth: DEFAULT_FRAME_BORDER_WIDTH,
fill: 'rgba(0,0,0,0)'
}
}));
// Left and right handle to resize
each([0, 1] as const, function (handleIndex) {
let iconStr = dataZoomModel.get('handleIcon');
if (
!symbolBuildProxies[iconStr]
&& iconStr.indexOf('path://') < 0
&& iconStr.indexOf('image://') < 0
) {
// Compatitable with the old icon parsers. Which can use a path string without path://
iconStr = 'path://' + iconStr;
if (__DEV__) {
deprecateLog('handleIcon now needs \'path://\' prefix when using a path string');
}
}
const path = createSymbol(
iconStr,
-1, 0, 2, 2, null, true
) as graphic.Path;
path.attr({
cursor: getCursor(this._orient),
draggable: true,
drift: bind(this._onDragMove, this, handleIndex),
ondragend: bind(this._onDragEnd, this),
onmouseover: bind(this._showDataInfo, this, true),
onmouseout: bind(this._showDataInfo, this, false),
z2: 5
});
const bRect = path.getBoundingRect();
const handleSize = dataZoomModel.get('handleSize');
this._handleHeight = parsePercent(handleSize, this._size[1]);
this._handleWidth = bRect.width / bRect.height * this._handleHeight;
path.setStyle(dataZoomModel.getModel('handleStyle').getItemStyle());
path.style.strokeNoScale = true;
path.rectHover = true;
path.ensureState('emphasis').style = dataZoomModel.getModel(['emphasis', 'handleStyle']).getItemStyle();
enableHoverEmphasis(path);
const handleColor = dataZoomModel.get('handleColor' as any); // deprecated option
// Compatitable with previous version
if (handleColor != null) {
path.style.fill = handleColor;
}
sliderGroup.add(handles[handleIndex] = path);
const textStyleModel = dataZoomModel.getModel('textStyle');
thisGroup.add(
handleLabels[handleIndex] = new graphic.Text({
silent: true,
invisible: true,
style: createTextStyle(textStyleModel, {
x: 0, y: 0, text: '',
verticalAlign: 'middle',
align: 'center',
fill: textStyleModel.getTextColor(),
font: textStyleModel.getFont()
}),
z2: 10
}));
}, this);
// Handle to move. Only visible when brushSelect is set true.
let actualMoveZone: Displayable = filler;
if (brushSelect) {
const moveHandleHeight = parsePercent(dataZoomModel.get('moveHandleSize'), size[1]);
const moveHandle = displayables.moveHandle = new graphic.Rect({
style: dataZoomModel.getModel('moveHandleStyle').getItemStyle(),
silent: true,
shape: {
r: [0, 0, 2, 2],
y: size[1] - 0.5,
height: moveHandleHeight
}
});
const iconSize = moveHandleHeight * 0.8;
const moveHandleIcon = displayables.moveHandleIcon = createSymbol(
dataZoomModel.get('moveHandleIcon'),
-iconSize / 2, -iconSize / 2, iconSize, iconSize,
'#fff',
true
);
moveHandleIcon.silent = true;
moveHandleIcon.y = size[1] + moveHandleHeight / 2 - 0.5;
moveHandle.ensureState('emphasis').style = dataZoomModel.getModel(
['emphasis', 'moveHandleStyle']
).getItemStyle();
const moveZoneExpandSize = Math.min(size[1] / 2, Math.max(moveHandleHeight, 10));
actualMoveZone = displayables.moveZone = new graphic.Rect({
invisible: true,
shape: {
y: size[1] - moveZoneExpandSize,
height: moveHandleHeight + moveZoneExpandSize
}
});
actualMoveZone.on('mouseover', () => {
api.enterEmphasis(moveHandle);
})
.on('mouseout', () => {
api.leaveEmphasis(moveHandle);
});
sliderGroup.add(moveHandle);
sliderGroup.add(moveHandleIcon);
sliderGroup.add(actualMoveZone);
}
actualMoveZone.attr({
draggable: true,
cursor: getCursor(this._orient),
drift: bind(this._onDragMove, this, 'all'),
ondragstart: bind(this._showDataInfo, this, true),
ondragend: bind(this._onDragEnd, this),
onmouseover: bind(this._showDataInfo, this, true),
onmouseout: bind(this._showDataInfo, this, false)
});
}
private _resetInterval() {
const range = this._range = this.dataZoomModel.getPercentRange();
const viewExtent = this._getViewExtent();
this._handleEnds = [
linearMap(range[0], [0, 100], viewExtent, true),
linearMap(range[1], [0, 100], viewExtent, true)
];
}
private _updateInterval(handleIndex: 0 | 1 | 'all', delta: number): boolean {
const dataZoomModel = this.dataZoomModel;
const handleEnds = this._handleEnds;
const viewExtend = this._getViewExtent();
const minMaxSpan = dataZoomModel.findRepresentativeAxisProxy().getMinMaxSpan();
const percentExtent = [0, 100];
sliderMove(
delta,
handleEnds,
viewExtend,
dataZoomModel.get('zoomLock') ? 'all' : handleIndex,
minMaxSpan.minSpan != null
? linearMap(minMaxSpan.minSpan, percentExtent, viewExtend, true) : null,
minMaxSpan.maxSpan != null
? linearMap(minMaxSpan.maxSpan, percentExtent, viewExtend, true) : null
);
const lastRange = this._range;
const range = this._range = asc([
linearMap(handleEnds[0], viewExtend, percentExtent, true),
linearMap(handleEnds[1], viewExtend, percentExtent, true)
]);
return !lastRange || lastRange[0] !== range[0] || lastRange[1] !== range[1];
}
private _updateView(nonRealtime?: boolean) {
const displaybles = this._displayables;
const handleEnds = this._handleEnds;
const handleInterval = asc(handleEnds.slice());
const size = this._size;
each([0, 1] as const, function (handleIndex) {
// Handles
const handle = displaybles.handles[handleIndex];
const handleHeight = this._handleHeight;
(handle as graphic.Path).attr({
scaleX: handleHeight / 2,
scaleY: handleHeight / 2,
// This is a trick, by adding an extra tiny offset to let the default handle's end point align to the drag window.
// NOTE: It may affect some custom shapes a bit. But we prefer to have better result by default.
x: handleEnds[handleIndex] + (handleIndex ? -1 : 1),
y: size[1] / 2 - handleHeight / 2
});
}, this);
// Filler
displaybles.filler.setShape({
x: handleInterval[0],
y: 0,
width: handleInterval[1] - handleInterval[0],
height: size[1]
});
const viewExtent = {
x: handleInterval[0],
width: handleInterval[1] - handleInterval[0]
};
// Move handle
if (displaybles.moveHandle) {
displaybles.moveHandle.setShape(viewExtent);
displaybles.moveZone.setShape(viewExtent);
// Force update path on the invisible object
displaybles.moveZone.getBoundingRect();
displaybles.moveHandleIcon && displaybles.moveHandleIcon.attr('x', viewExtent.x + viewExtent.width / 2);
}
// update clip path of shadow.
const dataShadowSegs = displaybles.dataShadowSegs;
const segIntervals = [0, handleInterval[0], handleInterval[1], size[0]];
for (let i = 0; i < dataShadowSegs.length; i++) {
const segGroup = dataShadowSegs[i];
let clipPath = segGroup.getClipPath();
if (!clipPath) {
clipPath = new graphic.Rect();
segGroup.setClipPath(clipPath);
}
clipPath.setShape({
x: segIntervals[i],
y: 0,
width: segIntervals[i + 1] - segIntervals[i],
height: size[1]
});
}
this._updateDataInfo(nonRealtime);
}
private _updateDataInfo(nonRealtime?: boolean) {
const dataZoomModel = this.dataZoomModel;
const displaybles = this._displayables;
const handleLabels = displaybles.handleLabels;
const orient = this._orient;
let labelTexts = ['', ''];
// FIXME
// date型，支持formatter，autoformatter（ec2 date.getAutoFormatter）
if (dataZoomModel.get('showDetail')) {
const axisProxy = dataZoomModel.findRepresentativeAxisProxy();
if (axisProxy) {
const axis = axisProxy.getAxisModel().axis;
const range = this._range;
const dataInterval = nonRealtime
// See #4434, data and axis are not processed and reset yet in non-realtime mode.
? axisProxy.calculateDataWindow({
start: range[0], end: range[1]
}).valueWindow
: axisProxy.getDataValueWindow();
labelTexts = [
this._formatLabel(dataInterval[0], axis),
this._formatLabel(dataInterval[1], axis)
];
}
}
const orderedHandleEnds = asc(this._handleEnds.slice());
setLabel.call(this, 0);
setLabel.call(this, 1);
function setLabel(this: SliderZoomView, handleIndex: 0 | 1) {
// Label
// Text should not transform by barGroup.
// Ignore handlers transform
const barTransform = graphic.getTransform(
displaybles.handles[handleIndex].parent, this.group
);
const direction = graphic.transformDirection(
handleIndex === 0 ? 'right' : 'left', barTransform
);
const offset = this._handleWidth / 2 + LABEL_GAP;
const textPoint = graphic.applyTransform(
[
orderedHandleEnds[handleIndex] + (handleIndex === 0 ? -offset : offset),
this._size[1] / 2
],
barTransform
);
handleLabels[handleIndex].setStyle({
x: textPoint[0],
y: textPoint[1],
verticalAlign: orient === HORIZONTAL ? 'middle' : direction as ZRTextVerticalAlign,
align: orient === HORIZONTAL ? direction as ZRTextAlign : 'center',
text: labelTexts[handleIndex]
});
}
}
private _formatLabel(value: ParsedValue, axis: Axis) {
const dataZoomModel = this.dataZoomModel;
const labelFormatter = dataZoomModel.get('labelFormatter');
let labelPrecision = dataZoomModel.get('labelPrecision');
if (labelPrecision == null || labelPrecision === 'auto') {
labelPrecision = axis.getPixelPrecision();
}
const valueStr = (value == null || isNaN(value as number))
? ''
// FIXME Glue code
: (axis.type === 'category' || axis.type === 'time')
? axis.scale.getLabel({
value: Math.round(value as number)
})
// param of toFixed should less then 20.
: (value as number).toFixed(Math.min(labelPrecision as number, 20));
return isFunction(labelFormatter)
? labelFormatter(value as number, valueStr)
: isString(labelFormatter)
? labelFormatter.replace('{value}', valueStr)
: valueStr;
}
/**
* @param showOrHide true: show, false: hide
*/
private _showDataInfo(showOrHide?: boolean) {
// Always show when drgging.
showOrHide = this._dragging || showOrHide;
const displayables = this._displayables;
const handleLabels = displayables.handleLabels;
handleLabels[0].attr('invisible', !showOrHide);
handleLabels[1].attr('invisible', !showOrHide);
// Highlight move handle
displayables.moveHandle
&& this.api[showOrHide ? 'enterEmphasis' : 'leaveEmphasis'](displayables.moveHandle, 1);
}
private _onDragMove(handleIndex: 0 | 1 | 'all', dx: number, dy: number, event: ZRElementEvent) {
this._dragging = true;
// For mobile device, prevent screen slider on the button.
eventTool.stop(event.event);
// Transform dx, dy to bar coordination.
const barTransform = this._displayables.sliderGroup.getLocalTransform();
const vertex = graphic.applyTransform([dx, dy], barTransform, true);
const changed = this._updateInterval(handleIndex, vertex[0]);
const realtime = this.dataZoomModel.get('realtime');
this._updateView(!realtime);
// Avoid dispatch dataZoom repeatly but range not changed,
// which cause bad visual effect when progressive enabled.
changed && realtime && this._dispatchZoomAction(true);
}
private _onDragEnd() {
this._dragging = false;
this._showDataInfo(false);
// While in realtime mode and stream mode, dispatch action when
// drag end will cause the whole view rerender, which is unnecessary.
const realtime = this.dataZoomModel.get('realtime');
!realtime && this._dispatchZoomAction(false);
}
private _onClickPanel(e: ZRElementEvent) {
const size = this._size;
const localPoint = this._displayables.sliderGroup.transformCoordToLocal(e.offsetX, e.offsetY);
if (localPoint[0] < 0 || localPoint[0] > size[0]
|| localPoint[1] < 0 || localPoint[1] > size[1]
) {
return;
}
const handleEnds = this._handleEnds;
const center = (handleEnds[0] + handleEnds[1]) / 2;
const changed = this._updateInterval('all', localPoint[0] - center);
this._updateView();
changed && this._dispatchZoomAction(false);
}
private _onBrushStart(e: ZRElementEvent) {
const x = e.offsetX;
const y = e.offsetY;
this._brushStart = new graphic.Point(x, y);
this._brushing = true;
this._brushStartTime = +new Date();
// this._updateBrushRect(x, y);
}
private _onBrushEnd(e: ZRElementEvent) {
if (!this._brushing) {
return;
}
const brushRect = this._displayables.brushRect;
this._brushing = false;
if (!brushRect) {
return;
}
brushRect.attr('ignore', true);
const brushShape = brushRect.shape;
const brushEndTime = +new Date();
// console.log(brushEndTime - this._brushStartTime);
if (brushEndTime - this._brushStartTime < 200 && Math.abs(brushShape.width) < 5) {
// Will treat it as a click
return;
}
const viewExtend = this._getViewExtent();
const percentExtent = [0, 100];
this._range = asc([
linearMap(brushShape.x, viewExtend, percentExtent, true),
linearMap(brushShape.x + brushShape.width, viewExtend, percentExtent, true)
]);
this._handleEnds = [brushShape.x, brushShape.x + brushShape.width];
this._updateView();
this._dispatchZoomAction(false);
}
private _onBrush(e: ZRElementEvent) {
if (this._brushing) {
// For mobile device, prevent screen slider on the button.
eventTool.stop(e.event);
this._updateBrushRect(e.offsetX, e.offsetY);
}
}
private _updateBrushRect(mouseX: number, mouseY: number) {
const displayables = this._displayables;
const dataZoomModel = this.dataZoomModel;
let brushRect = displayables.brushRect;
if (!brushRect) {
brushRect = displayables.brushRect = new Rect({
silent: true,
style: dataZoomModel.getModel('brushStyle').getItemStyle()
});
displayables.sliderGroup.add(brushRect);
}
brushRect.attr('ignore', false);
const brushStart = this._brushStart;
const sliderGroup = this._displayables.sliderGroup;
const endPoint = sliderGroup.transformCoordToLocal(mouseX, mouseY);
const startPoint = sliderGroup.transformCoordToLocal(brushStart.x, brushStart.y);
const size = this._size;
endPoint[0] = Math.max(Math.min(size[0], endPoint[0]), 0);
brushRect.setShape({
x: startPoint[0], y: 0,
width: endPoint[0] - startPoint[0], height: size[1]
});
}
/**
* This action will be throttled.
*/
_dispatchZoomAction(realtime: boolean) {
const range = this._range;
this.api.dispatchAction({
type: 'dataZoom',
from: this.uid,
dataZoomId: this.dataZoomModel.id,
animation: realtime ? REALTIME_ANIMATION_CONFIG : null,
start: range[0],
end: range[1]
});
}
private _findCoordRect() {
// Find the grid coresponding to the first axis referred by dataZoom.
let rect: RectLike;
const coordSysInfoList = collectReferCoordSysModelInfo(this.dataZoomModel).infoList;
if (!rect && coordSysInfoList.length) {
const coordSys = coordSysInfoList[0].model.coordinateSystem;
rect = coordSys.getRect && coordSys.getRect();
}
if (!rect) {
const width = this.api.getWidth();
const height = this.api.getHeight();
rect = {
x: width * 0.2,
y: height * 0.2,
width: width * 0.6,
height: height * 0.6
};
}
return rect;
}
}
function getOtherDim(thisDim: 'x' | 'y' | 'radius' | 'angle' | 'single' | 'z') {
// FIXME
// 这个逻辑和getOtherAxis里一致，但是写在这里是否不好
const map = {x: 'y', y: 'x', radius: 'angle', angle: 'radius'};
return map[thisDim as 'x' | 'y' | 'radius' | 'angle'];
}
function getCursor(orient: LayoutOrient) {
return orient === 'vertical' ? 'ns-resize' : 'ew-resize';
}
export default SliderZoomView;
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