ngx-treeview
Version:
An Angular treeview component with checkbox
97 lines • 10.9 kB
JavaScript
import { Injectable } from '@angular/core';
import { isNil } from 'lodash';
export class TreeviewEventParser {
}
TreeviewEventParser.decorators = [
{ type: Injectable }
];
export class DefaultTreeviewEventParser extends TreeviewEventParser {
getSelectedChange(component) {
const checkedItems = component.selection.checkedItems;
if (!isNil(checkedItems)) {
return checkedItems.map(item => item.value);
}
return [];
}
}
DefaultTreeviewEventParser.decorators = [
{ type: Injectable }
];
export class DownlineTreeviewEventParser extends TreeviewEventParser {
getSelectedChange(component) {
const items = component.items;
if (!isNil(items)) {
let result = [];
items.forEach(item => {
const links = this.getLinks(item, null);
if (!isNil(links)) {
result = result.concat(links);
}
});
return result;
}
return [];
}
getLinks(item, parent) {
if (!isNil(item.children)) {
const link = {
item,
parent
};
let result = [];
item.children.forEach(child => {
const links = this.getLinks(child, link);
if (!isNil(links)) {
result = result.concat(links);
}
});
return result;
}
if (item.checked) {
return [{
item,
parent
}];
}
return null;
}
}
DownlineTreeviewEventParser.decorators = [
{ type: Injectable }
];
export class OrderDownlineTreeviewEventParser extends TreeviewEventParser {
constructor() {
super(...arguments);
this.currentDownlines = [];
this.parser = new DownlineTreeviewEventParser();
}
getSelectedChange(component) {
const newDownlines = this.parser.getSelectedChange(component);
if (this.currentDownlines.length === 0) {
this.currentDownlines = newDownlines;
}
else {
const intersectDownlines = [];
this.currentDownlines.forEach(downline => {
let foundIndex = -1;
const length = newDownlines.length;
for (let i = 0; i < length; i++) {
if (downline.item.value === newDownlines[i].item.value) {
foundIndex = i;
break;
}
}
if (foundIndex !== -1) {
intersectDownlines.push(newDownlines[foundIndex]);
newDownlines.splice(foundIndex, 1);
}
});
this.currentDownlines = intersectDownlines.concat(newDownlines);
}
return this.currentDownlines;
}
}
OrderDownlineTreeviewEventParser.decorators = [
{ type: Injectable }
];
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