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META-INF.assets.rjzjh.echarts.src.component.dataZoom.roams.js Maven / Gradle / Ivy
/**
* @file Roam controller manager.
*/
define(function(require) {
// Only create one roam controller for each coordinate system.
// one roam controller might be refered by two inside data zoom
// components (for example, one for x and one for y). When user
// pan or zoom, only dispatch one action for those data zoom
// components.
var zrUtil = require('zrender/core/util');
var RoamController = require('../../component/helper/RoamController');
var throttle = require('../../util/throttle');
var curry = zrUtil.curry;
var ATTR = '\0_ec_dataZoom_roams';
var roams = {
/**
* @public
* @param {module:echarts/ExtensionAPI} api
* @param {Object} dataZoomInfo
* @param {string} dataZoomInfo.coordId
* @param {Object} dataZoomInfo.coordinateSystem
* @param {Array.} dataZoomInfo.allCoordIds
* @param {string} dataZoomInfo.dataZoomId
* @param {number} dataZoomInfo.throttleRate
* @param {Function} dataZoomInfo.panGetRange
* @param {Function} dataZoomInfo.zoomGetRange
*/
register: function (api, dataZoomInfo) {
var store = giveStore(api);
var theDataZoomId = dataZoomInfo.dataZoomId;
var theCoordId = dataZoomInfo.coordId;
// Do clean when a dataZoom changes its target coordnate system.
zrUtil.each(store, function (record, coordId) {
var dataZoomInfos = record.dataZoomInfos;
if (dataZoomInfos[theDataZoomId]
&& zrUtil.indexOf(dataZoomInfo.allCoordIds, theCoordId) < 0
) {
delete dataZoomInfos[theDataZoomId];
record.count--;
}
});
cleanStore(store);
var record = store[theCoordId];
// Create if needed.
if (!record) {
record = store[theCoordId] = {
coordId: theCoordId,
dataZoomInfos: {},
count: 0
};
record.controller = createController(api, dataZoomInfo, record);
record.dispatchAction = zrUtil.curry(dispatchAction, api);
}
// Consider resize, area should be always updated.
var rect = dataZoomInfo.coordinateSystem.getRect().clone();
record.controller.rectProvider = function () {
return rect;
};
// Update throttle.
throttle.createOrUpdate(
record,
'dispatchAction',
dataZoomInfo.throttleRate,
'fixRate'
);
// Update reference of dataZoom.
!(record.dataZoomInfos[theDataZoomId]) && record.count++;
record.dataZoomInfos[theDataZoomId] = dataZoomInfo;
},
/**
* @public
* @param {module:echarts/ExtensionAPI} api
* @param {string} dataZoomId
*/
unregister: function (api, dataZoomId) {
var store = giveStore(api);
zrUtil.each(store, function (record) {
var dataZoomInfos = record.dataZoomInfos;
if (dataZoomInfos[dataZoomId]) {
delete dataZoomInfos[dataZoomId];
record.count--;
}
});
cleanStore(store);
},
/**
* @public
*/
shouldRecordRange: function (payload, dataZoomId) {
if (payload && payload.type === 'dataZoom' && payload.batch) {
for (var i = 0, len = payload.batch.length; i < len; i++) {
if (payload.batch[i].dataZoomId === dataZoomId) {
return false;
}
}
}
return true;
},
/**
* @public
*/
generateCoordId: function (coordModel) {
return coordModel.type + '\0_' + coordModel.id;
}
};
/**
* Key: coordId, value: {dataZoomInfos: [], count, controller}
* @type {Array.}
*/
function giveStore(api) {
// Mount store on zrender instance, so that we do not
// need to worry about dispose.
var zr = api.getZr();
return zr[ATTR] || (zr[ATTR] = {});
}
function createController(api, dataZoomInfo, newRecord) {
var controller = new RoamController(api.getZr());
controller.enable();
controller.on('pan', curry(onPan, newRecord));
controller.on('zoom', curry(onZoom, newRecord));
return controller;
}
function cleanStore(store) {
zrUtil.each(store, function (record, coordId) {
if (!record.count) {
record.controller.off('pan').off('zoom');
delete store[coordId];
}
});
}
function onPan(record, dx, dy) {
wrapAndDispatch(record, function (info) {
return info.panGetRange(record.controller, dx, dy);
});
}
function onZoom(record, scale, mouseX, mouseY) {
wrapAndDispatch(record, function (info) {
return info.zoomGetRange(record.controller, scale, mouseX, mouseY);
});
}
function wrapAndDispatch(record, getRange) {
var batch = [];
zrUtil.each(record.dataZoomInfos, function (info) {
var range = getRange(info);
range && batch.push({
dataZoomId: info.dataZoomId,
start: range[0],
end: range[1]
});
});
record.dispatchAction(batch);
}
/**
* This action will be throttled.
*/
function dispatchAction(api, batch) {
api.dispatchAction({
type: 'dataZoom',
batch: batch
});
}
return roams;
});
