ParallelAxisView.js

/*
* 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 echarts from '../../echarts';
import * as zrUtil from 'zrender/src/core/util';
import AxisBuilder from './AxisBuilder';
import BrushController from '../helper/BrushController';
import * as brushHelper from '../helper/brushHelper';
import * as graphic from '../../util/graphic';

var elementList = ['axisLine', 'axisTickLabel', 'axisName'];

var AxisView = echarts.extendComponentView({

    type: 'parallelAxis',

    /**
     * @override
     */
    init: function (ecModel, api) {
        AxisView.superApply(this, 'init', arguments);

        /**
         * @type {module:echarts/component/helper/BrushController}
         */
        (this._brushController = new BrushController(api.getZr()))
            .on('brush', zrUtil.bind(this._onBrush, this));
    },

    /**
     * @override
     */
    render: function (axisModel, ecModel, api, payload) {
        if (fromAxisAreaSelect(axisModel, ecModel, payload)) {
            return;
        }

        this.axisModel = axisModel;
        this.api = api;

        this.group.removeAll();

        var oldAxisGroup = this._axisGroup;
        this._axisGroup = new graphic.Group();
        this.group.add(this._axisGroup);

        if (!axisModel.get('show')) {
            return;
        }

        var coordSysModel = getCoordSysModel(axisModel, ecModel);
        var coordSys = coordSysModel.coordinateSystem;

        var areaSelectStyle = axisModel.getAreaSelectStyle();
        var areaWidth = areaSelectStyle.width;

        var dim = axisModel.axis.dim;
        var axisLayout = coordSys.getAxisLayout(dim);

        var builderOpt = zrUtil.extend(
            {strokeContainThreshold: areaWidth},
            axisLayout
        );

        var axisBuilder = new AxisBuilder(axisModel, builderOpt);

        zrUtil.each(elementList, axisBuilder.add, axisBuilder);

        this._axisGroup.add(axisBuilder.getGroup());

        this._refreshBrushController(
            builderOpt, areaSelectStyle, axisModel, coordSysModel, areaWidth, api
        );

        var animationModel = (payload && payload.animation === false) ? null : axisModel;
        graphic.groupTransition(oldAxisGroup, this._axisGroup, animationModel);
    },

    // /**
    //  * @override
    //  */
    // updateVisual: function (axisModel, ecModel, api, payload) {
    //     this._brushController && this._brushController
    //         .updateCovers(getCoverInfoList(axisModel));
    // },

    _refreshBrushController: function (
        builderOpt, areaSelectStyle, axisModel, coordSysModel, areaWidth, api
    ) {
        // After filtering, axis may change, select area needs to be update.
        var extent = axisModel.axis.getExtent();
        var extentLen = extent[1] - extent[0];
        var extra = Math.min(30, Math.abs(extentLen) * 0.1); // Arbitrary value.

        // width/height might be negative, which will be
        // normalized in BoundingRect.
        var rect = graphic.BoundingRect.create({
            x: extent[0],
            y: -areaWidth / 2,
            width: extentLen,
            height: areaWidth
        });
        rect.x -= extra;
        rect.width += 2 * extra;

        this._brushController
            .mount({
                enableGlobalPan: true,
                rotation: builderOpt.rotation,
                position: builderOpt.position
            })
            .setPanels([{
                panelId: 'pl',
                clipPath: brushHelper.makeRectPanelClipPath(rect),
                isTargetByCursor: brushHelper.makeRectIsTargetByCursor(rect, api, coordSysModel),
                getLinearBrushOtherExtent: brushHelper.makeLinearBrushOtherExtent(rect, 0)
            }])
            .enableBrush({
                brushType: 'lineX',
                brushStyle: areaSelectStyle,
                removeOnClick: true
            })
            .updateCovers(getCoverInfoList(axisModel));
    },

    _onBrush: function (coverInfoList, opt) {
        // Do not cache these object, because the mey be changed.
        var axisModel = this.axisModel;
        var axis = axisModel.axis;
        var intervals = zrUtil.map(coverInfoList, function (coverInfo) {
            return [
                axis.coordToData(coverInfo.range[0], true),
                axis.coordToData(coverInfo.range[1], true)
            ];
        });

        // If realtime is true, action is not dispatched on drag end, because
        // the drag end emits the same params with the last drag move event,
        // and may have some delay when using touch pad.
        if (!axisModel.option.realtime === opt.isEnd || opt.removeOnClick) { // jshint ignore:line
            this.api.dispatchAction({
                type: 'axisAreaSelect',
                parallelAxisId: axisModel.id,
                intervals: intervals
            });
        }
    },

    /**
     * @override
     */
    dispose: function () {
        this._brushController.dispose();
    }
});

function fromAxisAreaSelect(axisModel, ecModel, payload) {
    return payload
        && payload.type === 'axisAreaSelect'
        && ecModel.findComponents(
            {mainType: 'parallelAxis', query: payload}
        )[0] === axisModel;
}

function getCoverInfoList(axisModel) {
    var axis = axisModel.axis;
    return zrUtil.map(axisModel.activeIntervals, function (interval) {
        return {
            brushType: 'lineX',
            panelId: 'pl',
            range: [
                axis.dataToCoord(interval[0], true),
                axis.dataToCoord(interval[1], true)
            ]
        };
    });
}

function getCoordSysModel(axisModel, ecModel) {
    return ecModel.getComponent(
        'parallel', axisModel.get('parallelIndex')
    );
}

export default AxisView;