/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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import GlobalModel from '../../model/Global';
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import ParallelModel, { ParallelCoordinateSystemOption } from '../../coord/parallel/ParallelModel';
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import ExtensionAPI from '../../core/ExtensionAPI';
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import ComponentView from '../../view/Component';
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import { ElementEventName } from 'zrender/src/core/types';
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import { ElementEvent } from 'zrender/src/Element';
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import { ParallelAxisExpandPayload } from '../axis/parallelAxisAction';
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import { each, bind, extend } from 'zrender/src/core/util';
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import { ThrottleController, createOrUpdate } from '../../util/throttle';
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const CLICK_THRESHOLD = 5; // > 4
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class ParallelView extends ComponentView {
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static type = 'parallel';
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readonly type = ParallelView.type;
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// @internal
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_model: ParallelModel;
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private _api: ExtensionAPI;
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// @internal
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_mouseDownPoint: number[];
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private _handlers: Partial<Record<ElementEventName, ElementEventHandler>>;
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render(parallelModel: ParallelModel, ecModel: GlobalModel, api: ExtensionAPI): void {
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this._model = parallelModel;
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this._api = api;
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if (!this._handlers) {
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this._handlers = {};
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each(handlers, function (handler: ElementEventHandler, eventName) {
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api.getZr().on(eventName, this._handlers[eventName] = bind(handler, this) as ElementEventHandler);
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}, this);
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}
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createOrUpdate(this, '_throttledDispatchExpand', parallelModel.get('axisExpandRate'), 'fixRate');
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}
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dispose(ecModel: GlobalModel, api: ExtensionAPI): void {
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each(this._handlers, function (handler: ElementEventHandler, eventName) {
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api.getZr().off(eventName, handler);
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});
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this._handlers = null;
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}
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/**
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* @internal
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* @param {Object} [opt] If null, cancle the last action triggering for debounce.
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*/
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_throttledDispatchExpand(this: ParallelView, opt: Omit<ParallelAxisExpandPayload, 'type'>): void {
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this._dispatchExpand(opt);
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}
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/**
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* @internal
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*/
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_dispatchExpand(opt: Omit<ParallelAxisExpandPayload, 'type'>) {
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opt && this._api.dispatchAction(extend({ type: 'parallelAxisExpand' }, opt));
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}
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}
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type ElementEventHandler = (this: ParallelView, e: ElementEvent) => void;
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const handlers: Partial<Record<ElementEventName, ElementEventHandler>> = {
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mousedown: function (e) {
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if (checkTrigger(this, 'click')) {
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this._mouseDownPoint = [e.offsetX, e.offsetY];
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}
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},
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mouseup: function (e) {
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const mouseDownPoint = this._mouseDownPoint;
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if (checkTrigger(this, 'click') && mouseDownPoint) {
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const point = [e.offsetX, e.offsetY];
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const dist = Math.pow(mouseDownPoint[0] - point[0], 2)
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+ Math.pow(mouseDownPoint[1] - point[1], 2);
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if (dist > CLICK_THRESHOLD) {
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return;
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}
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const result = this._model.coordinateSystem.getSlidedAxisExpandWindow([e.offsetX, e.offsetY]);
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result.behavior !== 'none' && this._dispatchExpand({
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axisExpandWindow: result.axisExpandWindow
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});
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}
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this._mouseDownPoint = null;
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},
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mousemove: function (e) {
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// Should do nothing when brushing.
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if (this._mouseDownPoint || !checkTrigger(this, 'mousemove')) {
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return;
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}
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const model = this._model;
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const result = model.coordinateSystem.getSlidedAxisExpandWindow([e.offsetX, e.offsetY]);
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const behavior = result.behavior;
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behavior === 'jump'
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&& (this._throttledDispatchExpand as ParallelView['_throttledDispatchExpand'] & ThrottleController)
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.debounceNextCall(model.get('axisExpandDebounce'));
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this._throttledDispatchExpand(behavior === 'none'
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? null // Cancle the last trigger, in case that mouse slide out of the area quickly.
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: {
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axisExpandWindow: result.axisExpandWindow,
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// Jumping uses animation, and sliding suppresses animation.
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animation: behavior === 'jump' ? null : {
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duration: 0 // Disable animation.
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}
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});
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}
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};
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function checkTrigger(view: ParallelView, triggerOn: ParallelCoordinateSystemOption['axisExpandTriggerOn']): boolean {
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const model = view._model;
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return model.get('axisExpandable') && model.get('axisExpandTriggerOn') === triggerOn;
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}
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export default ParallelView;
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