ngx-treeview
Version:
An Angular treeview component with checkbox
210 lines • 30.6 kB
JavaScript
import { Component, Input, Output, EventEmitter } from '@angular/core';
import { isNil, includes } from 'lodash';
import { TreeviewI18n } from '../../models/treeview-i18n';
import { TreeviewItem } from '../../models/treeview-item';
import { TreeviewConfig } from '../../models/treeview-config';
import { TreeviewHelper } from '../../helpers/treeview-helper';
import { TreeviewEventParser } from '../../helpers/treeview-event-parser';
class FilterTreeviewItem extends TreeviewItem {
constructor(item) {
super({
text: item.text,
value: item.value,
disabled: item.disabled,
checked: item.checked,
collapsed: item.collapsed,
children: item.children
});
this.refItem = item;
}
updateRefChecked() {
this.children.forEach(child => {
if (child instanceof FilterTreeviewItem) {
child.updateRefChecked();
}
});
let refChecked = this.checked;
if (refChecked) {
for (const refChild of this.refItem.children) {
if (!refChild.checked) {
refChecked = false;
break;
}
}
}
this.refItem.checked = refChecked;
}
}
export class TreeviewComponent {
constructor(i18n, defaultConfig, eventParser) {
this.i18n = i18n;
this.defaultConfig = defaultConfig;
this.eventParser = eventParser;
this.selectedChange = new EventEmitter();
this.filterChange = new EventEmitter();
this.filterText = '';
this.config = this.defaultConfig;
this.allItem = new TreeviewItem({ text: 'All', value: undefined });
}
get hasFilterItems() {
return !isNil(this.filterItems) && this.filterItems.length > 0;
}
get maxHeight() {
return `${this.config.maxHeight}`;
}
ngOnInit() {
this.createHeaderTemplateContext();
this.generateSelection();
}
ngOnChanges(changes) {
const itemsSimpleChange = changes.items;
if (!isNil(itemsSimpleChange) && !isNil(this.items)) {
this.updateFilterItems();
this.updateCollapsedOfAll();
this.raiseSelectedChange();
}
}
onAllCollapseExpand() {
this.allItem.collapsed = !this.allItem.collapsed;
this.filterItems.forEach(item => item.setCollapsedRecursive(this.allItem.collapsed));
}
onFilterTextChange(text) {
this.filterText = text;
this.filterChange.emit(text);
this.updateFilterItems();
}
onAllCheckedChange() {
const checked = this.allItem.checked;
this.filterItems.forEach(item => {
item.setCheckedRecursive(checked);
if (item instanceof FilterTreeviewItem) {
item.updateRefChecked();
}
});
this.raiseSelectedChange();
}
onItemCheckedChange(item, checked) {
if (item instanceof FilterTreeviewItem) {
item.updateRefChecked();
}
this.updateCheckedOfAll();
this.raiseSelectedChange();
}
raiseSelectedChange() {
this.generateSelection();
const values = this.eventParser.getSelectedChange(this);
setTimeout(() => {
this.selectedChange.emit(values);
});
}
createHeaderTemplateContext() {
this.headerTemplateContext = {
config: this.config,
item: this.allItem,
onCheckedChange: () => this.onAllCheckedChange(),
onCollapseExpand: () => this.onAllCollapseExpand(),
onFilterTextChange: (text) => this.onFilterTextChange(text)
};
}
generateSelection() {
let checkedItems = [];
let uncheckedItems = [];
if (!isNil(this.items)) {
const selection = TreeviewHelper.concatSelection(this.items, checkedItems, uncheckedItems);
checkedItems = selection.checked;
uncheckedItems = selection.unchecked;
}
this.selection = {
checkedItems,
uncheckedItems
};
}
updateFilterItems() {
if (this.filterText !== '') {
const filterItems = [];
const filterText = this.filterText.toLowerCase();
this.items.forEach(item => {
const newItem = this.filterItem(item, filterText);
if (!isNil(newItem)) {
filterItems.push(newItem);
}
});
this.filterItems = filterItems;
}
else {
this.filterItems = this.items;
}
this.updateCheckedOfAll();
}
filterItem(item, filterText) {
const isMatch = includes(item.text.toLowerCase(), filterText);
if (isMatch) {
return item;
}
else {
if (!isNil(item.children)) {
const children = [];
item.children.forEach(child => {
const newChild = this.filterItem(child, filterText);
if (!isNil(newChild)) {
children.push(newChild);
}
});
if (children.length > 0) {
const newItem = new FilterTreeviewItem(item);
newItem.collapsed = false;
newItem.children = children;
return newItem;
}
}
}
return undefined;
}
updateCheckedOfAll() {
let itemChecked = null;
for (const filterItem of this.filterItems) {
if (itemChecked === null) {
itemChecked = filterItem.checked;
}
else if (itemChecked !== filterItem.checked) {
itemChecked = undefined;
break;
}
}
if (itemChecked === null) {
itemChecked = false;
}
this.allItem.checked = itemChecked;
}
updateCollapsedOfAll() {
let hasItemExpanded = false;
for (const filterItem of this.filterItems) {
if (!filterItem.collapsed) {
hasItemExpanded = true;
break;
}
}
this.allItem.collapsed = !hasItemExpanded;
}
}
TreeviewComponent.decorators = [
{ type: Component, args: [{
selector: 'ngx-treeview',
template: "<ng-template #defaultItemTemplate let-item=\"item\" let-onCollapseExpand=\"onCollapseExpand\"\r\n let-onCheckedChange=\"onCheckedChange\">\r\n <div class=\"form-inline row-item\">\r\n <i *ngIf=\"item.children\" (click)=\"onCollapseExpand()\" aria-hidden=\"true\" [ngSwitch]=\"item.collapsed\">\r\n <svg *ngSwitchCase=\"true\" width=\"0.8rem\" height=\"0.8rem\" viewBox=\"0 0 16 16\" class=\"bi bi-caret-right-fill\"\r\n fill=\"currentColor\" xmlns=\"http://www.w3.org/2000/svg\">\r\n <path\r\n d=\"M12.14 8.753l-5.482 4.796c-.646.566-1.658.106-1.658-.753V3.204a1 1 0 0 1 1.659-.753l5.48 4.796a1 1 0 0 1 0 1.506z\" />\r\n </svg>\r\n <svg *ngSwitchCase=\"false\" width=\"0.8rem\" height=\"0.8rem\" viewBox=\"0 0 16 16\" class=\"bi bi-caret-down-fill\"\r\n fill=\"currentColor\" xmlns=\"http://www.w3.org/2000/svg\">\r\n <path\r\n d=\"M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z\" />\r\n </svg>\r\n </i>\r\n <div class=\"form-check\">\r\n <input type=\"checkbox\" class=\"form-check-input\" [(ngModel)]=\"item.checked\" (ngModelChange)=\"onCheckedChange()\"\r\n [disabled]=\"item.disabled\" [indeterminate]=\"item.indeterminate\" />\r\n <label class=\"form-check-label\" (click)=\"item.checked = !item.checked; onCheckedChange()\">\r\n {{item.text}}\r\n </label>\r\n </div>\r\n </div>\r\n</ng-template>\r\n<ng-template #defaultHeaderTemplate let-config=\"config\" let-item=\"item\" let-onCollapseExpand=\"onCollapseExpand\"\r\n let-onCheckedChange=\"onCheckedChange\" let-onFilterTextChange=\"onFilterTextChange\">\r\n <div *ngIf=\"config.hasFilter\" class=\"row row-filter\">\r\n <div class=\"col-12\">\r\n <input class=\"form-control\" type=\"text\" [placeholder]=\"i18n.getFilterPlaceholder()\" [(ngModel)]=\"filterText\"\r\n (ngModelChange)=\"onFilterTextChange($event)\" />\r\n </div>\r\n </div>\r\n <div *ngIf=\"hasFilterItems\">\r\n <div *ngIf=\"config.hasAllCheckBox || config.hasCollapseExpand\" class=\"row row-all\">\r\n <div class=\"col-12\">\r\n <div class=\"form-check form-check-inline\" *ngIf=\"config.hasAllCheckBox\">\r\n <input type=\"checkbox\" class=\"form-check-input\" [(ngModel)]=\"item.checked\" (ngModelChange)=\"onCheckedChange()\"\r\n [indeterminate]=\"item.indeterminate\" />\r\n <label class=\"form-check-label\" (click)=\"item.checked = !item.checked; onCheckedChange()\">\r\n {{i18n.getAllCheckboxText()}}\r\n </label>\r\n </div>\r\n <label *ngIf=\"config.hasCollapseExpand\" class=\"float-right form-check-label\" (click)=\"onCollapseExpand()\">\r\n <i [title]=\"i18n.getTooltipCollapseExpandText(item.collapsed)\" aria-hidden=\"true\" [ngSwitch]=\"item.collapsed\">\r\n <svg *ngSwitchCase=\"true\" width=\"1em\" height=\"1em\" viewBox=\"0 0 16 16\" class=\"bi bi-arrows-angle-expand\"\r\n fill=\"currentColor\" xmlns=\"http://www.w3.org/2000/svg\">\r\n <path fill-rule=\"evenodd\"\r\n d=\"M1.5 10.036a.5.5 0 0 1 .5.5v3.5h3.5a.5.5 0 0 1 0 1h-4a.5.5 0 0 1-.5-.5v-4a.5.5 0 0 1 .5-.5z\" />\r\n <path fill-rule=\"evenodd\"\r\n d=\"M6.354 9.646a.5.5 0 0 1 0 .708l-4.5 4.5a.5.5 0 0 1-.708-.708l4.5-4.5a.5.5 0 0 1 .708 0zm8.5-8.5a.5.5 0 0 1 0 .708l-4.5 4.5a.5.5 0 0 1-.708-.708l4.5-4.5a.5.5 0 0 1 .708 0z\" />\r\n <path fill-rule=\"evenodd\"\r\n d=\"M10.036 1.5a.5.5 0 0 1 .5-.5h4a.5.5 0 0 1 .5.5v4a.5.5 0 1 1-1 0V2h-3.5a.5.5 0 0 1-.5-.5z\" />\r\n </svg>\r\n <svg *ngSwitchCase=\"false\" width=\"1em\" height=\"1em\" viewBox=\"0 0 16 16\" class=\"bi bi-arrows-angle-contract\"\r\n fill=\"currentColor\" xmlns=\"http://www.w3.org/2000/svg\">\r\n <path fill-rule=\"evenodd\"\r\n d=\"M9.5 2.036a.5.5 0 0 1 .5.5v3.5h3.5a.5.5 0 0 1 0 1h-4a.5.5 0 0 1-.5-.5v-4a.5.5 0 0 1 .5-.5z\" />\r\n <path fill-rule=\"evenodd\"\r\n d=\"M14.354 1.646a.5.5 0 0 1 0 .708l-4.5 4.5a.5.5 0 1 1-.708-.708l4.5-4.5a.5.5 0 0 1 .708 0zm-7.5 7.5a.5.5 0 0 1 0 .708l-4.5 4.5a.5.5 0 0 1-.708-.708l4.5-4.5a.5.5 0 0 1 .708 0z\" />\r\n <path fill-rule=\"evenodd\"\r\n d=\"M2.036 9.5a.5.5 0 0 1 .5-.5h4a.5.5 0 0 1 .5.5v4a.5.5 0 0 1-1 0V10h-3.5a.5.5 0 0 1-.5-.5z\" />\r\n </svg>\r\n </i>\r\n </label>\r\n </div>\r\n </div>\r\n <div *ngIf=\"config.hasDivider\" class=\"dropdown-divider\"></div>\r\n </div>\r\n</ng-template>\r\n<div class=\"treeview-header\">\r\n <ng-template [ngTemplateOutlet]=\"headerTemplate || defaultHeaderTemplate\"\r\n [ngTemplateOutletContext]=\"headerTemplateContext\">\r\n </ng-template>\r\n</div>\r\n<div [ngSwitch]=\"hasFilterItems\">\r\n <div *ngSwitchCase=\"true\" class=\"treeview-container\" [style.max-height.px]=\"maxHeight\">\r\n <ngx-treeview-item *ngFor=\"let item of filterItems\" [config]=\"config\" [item]=\"item\"\r\n [template]=\"itemTemplate || defaultItemTemplate\" (checkedChange)=\"onItemCheckedChange(item, $event)\">\r\n </ngx-treeview-item>\r\n </div>\r\n <div *ngSwitchCase=\"false\" class=\"treeview-text\">\r\n {{i18n.getFilterNoItemsFoundText()}}\r\n </div>\r\n</div>\r\n",
styles: [":host .treeview-header .row-filter{margin-bottom:.5rem}:host .treeview-header .row-all .bi{cursor:pointer}:host .treeview-container .row-item{flex-wrap:nowrap;margin-bottom:.3rem}:host .treeview-container .row-item .bi{cursor:pointer;margin-right:.3rem}.treeview-container{overflow-y:auto;padding-right:.3rem}.treeview-text{padding:.3rem 0;white-space:nowrap}"]
},] }
];
TreeviewComponent.ctorParameters = () => [
{ type: TreeviewI18n },
{ type: TreeviewConfig },
{ type: TreeviewEventParser }
];
TreeviewComponent.propDecorators = {
headerTemplate: [{ type: Input }],
itemTemplate: [{ type: Input }],
items: [{ type: Input }],
config: [{ type: Input }],
selectedChange: [{ type: Output }],
filterChange: [{ type: Output }]
};
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{ Component, Input, Output, EventEmitter, SimpleChanges, OnChanges, TemplateRef, OnInit } from '@angular/core';\r\nimport { isNil, includes } from 'lodash';\r\nimport { TreeviewI18n } from '../../models/treeview-i18n';\r\nimport { TreeviewItem, TreeviewSelection } from '../../models/treeview-item';\r\nimport { TreeviewConfig } from '../../models/treeview-config';\r\nimport { TreeviewHeaderTemplateContext } from '../../models/treeview-header-template-context';\r\nimport { TreeviewItemTemplateContext } from '../../models/treeview-item-template-context';\r\nimport { TreeviewHelper } from '../../helpers/treeview-helper';\r\nimport { TreeviewEventParser } from '../../helpers/treeview-event-parser';\r\n\r\nclass FilterTreeviewItem extends TreeviewItem {\r\n  private readonly refItem: TreeviewItem;\r\n  constructor(item: TreeviewItem) {\r\n    super({\r\n      text: item.text,\r\n      value: item.value,\r\n      disabled: item.disabled,\r\n      checked: item.checked,\r\n      collapsed: item.collapsed,\r\n      children: item.children\r\n    });\r\n    this.refItem = item;\r\n  }\r\n\r\n  updateRefChecked(): void {\r\n    this.children.forEach(child => {\r\n      if (child instanceof FilterTreeviewItem) {\r\n        child.updateRefChecked();\r\n      }\r\n    });\r\n\r\n    let refChecked = this.checked;\r\n    if (refChecked) {\r\n      for (const refChild of this.refItem.children) {\r\n        if (!refChild.checked) {\r\n          refChecked = false;\r\n          break;\r\n        }\r\n      }\r\n    }\r\n    this.refItem.checked = refChecked;\r\n  }\r\n}\r\n\r\n@Component({\r\n  selector: 'ngx-treeview',\r\n  templateUrl: './treeview.component.html',\r\n  styleUrls: ['./treeview.component.scss']\r\n})\r\nexport class TreeviewComponent implements OnChanges, OnInit {\r\n  @Input() headerTemplate: TemplateRef<TreeviewHeaderTemplateContext>;\r\n  @Input() itemTemplate: TemplateRef<TreeviewItemTemplateContext>;\r\n  @Input() items: TreeviewItem[];\r\n  @Input() config: TreeviewConfig;\r\n  @Output() selectedChange = new EventEmitter<any[]>();\r\n  @Output() filterChange = new EventEmitter<string>();\r\n  headerTemplateContext: TreeviewHeaderTemplateContext;\r\n  allItem: TreeviewItem;\r\n  filterText = '';\r\n  filterItems: TreeviewItem[];\r\n  selection: TreeviewSelection;\r\n\r\n  constructor(\r\n    public i18n: TreeviewI18n,\r\n    private defaultConfig: TreeviewConfig,\r\n    private eventParser: TreeviewEventParser\r\n  ) {\r\n    this.config = this.defaultConfig;\r\n    this.allItem = new TreeviewItem({ text: 'All', value: undefined });\r\n  }\r\n\r\n  get hasFilterItems(): boolean {\r\n    return !isNil(this.filterItems) && this.filterItems.length > 0;\r\n  }\r\n\r\n  get maxHeight(): string {\r\n    return `${this.config.maxHeight}`;\r\n  }\r\n\r\n  ngOnInit(): void {\r\n    this.createHeaderTemplateContext();\r\n    this.generateSelection();\r\n  }\r\n\r\n  ngOnChanges(changes: SimpleChanges): void {\r\n    const itemsSimpleChange = changes.items;\r\n    if (!isNil(itemsSimpleChange) && !isNil(this.items)) {\r\n      this.updateFilterItems();\r\n      this.updateCollapsedOfAll();\r\n      this.raiseSelectedChange();\r\n    }\r\n  }\r\n\r\n  onAllCollapseExpand(): void {\r\n    this.allItem.collapsed = !this.allItem.collapsed;\r\n    this.filterItems.forEach(item => item.setCollapsedRecursive(this.allItem.collapsed));\r\n  }\r\n\r\n  onFilterTextChange(text: string): void {\r\n    this.filterText = text;\r\n    this.filterChange.emit(text);\r\n    this.updateFilterItems();\r\n  }\r\n\r\n  onAllCheckedChange(): void {\r\n    const checked = this.allItem.checked;\r\n    this.filterItems.forEach(item => {\r\n      item.setCheckedRecursive(checked);\r\n      if (item instanceof FilterTreeviewItem) {\r\n        item.updateRefChecked();\r\n      }\r\n    });\r\n\r\n    this.raiseSelectedChange();\r\n  }\r\n\r\n  onItemCheckedChange(item: TreeviewItem, checked: boolean): void {\r\n    if (item instanceof FilterTreeviewItem) {\r\n      item.updateRefChecked();\r\n    }\r\n\r\n    this.updateCheckedOfAll();\r\n    this.raiseSelectedChange();\r\n  }\r\n\r\n  raiseSelectedChange(): void {\r\n    this.generateSelection();\r\n    const values = this.eventParser.getSelectedChange(this);\r\n    setTimeout(() => {\r\n      this.selectedChange.emit(values);\r\n    });\r\n  }\r\n\r\n  private createHeaderTemplateContext(): void {\r\n    this.headerTemplateContext = {\r\n      config: this.config,\r\n      item: this.allItem,\r\n      onCheckedChange: () => this.onAllCheckedChange(),\r\n      onCollapseExpand: () => this.onAllCollapseExpand(),\r\n      onFilterTextChange: (text) => this.onFilterTextChange(text)\r\n    };\r\n  }\r\n\r\n  private generateSelection(): void {\r\n    let checkedItems: TreeviewItem[] = [];\r\n    let uncheckedItems: TreeviewItem[] = [];\r\n    if (!isNil(this.items)) {\r\n      const selection = TreeviewHelper.concatSelection(this.items, checkedItems, uncheckedItems);\r\n      checkedItems = selection.checked;\r\n      uncheckedItems = selection.unchecked;\r\n    }\r\n\r\n    this.selection = {\r\n      checkedItems,\r\n      uncheckedItems\r\n    };\r\n  }\r\n\r\n  private updateFilterItems(): void {\r\n    if (this.filterText !== '') {\r\n      const filterItems: TreeviewItem[] = [];\r\n      const filterText = this.filterText.toLowerCase();\r\n      this.items.forEach(item => {\r\n        const newItem = this.filterItem(item, filterText);\r\n        if (!isNil(newItem)) {\r\n          filterItems.push(newItem);\r\n        }\r\n      });\r\n      this.filterItems = filterItems;\r\n    } else {\r\n      this.filterItems = this.items;\r\n    }\r\n\r\n    this.updateCheckedOfAll();\r\n  }\r\n\r\n  private filterItem(item: TreeviewItem, filterText: string): TreeviewItem {\r\n    const isMatch = includes(item.text.toLowerCase(), filterText);\r\n    if (isMatch) {\r\n      return item;\r\n    } else {\r\n      if (!isNil(item.children)) {\r\n        const children: TreeviewItem[] = [];\r\n        item.children.forEach(child => {\r\n          const newChild = this.filterItem(child, filterText);\r\n          if (!isNil(newChild)) {\r\n            children.push(newChild);\r\n          }\r\n        });\r\n        if (children.length > 0) {\r\n          const newItem = new FilterTreeviewItem(item);\r\n          newItem.collapsed = false;\r\n          newItem.children = children;\r\n          return newItem;\r\n        }\r\n      }\r\n    }\r\n\r\n    return undefined;\r\n  }\r\n\r\n  private updateCheckedOfAll(): void {\r\n    let itemChecked: boolean = null;\r\n    for (const filterItem of this.filterItems) {\r\n      if (itemChecked === null) {\r\n        itemChecked = filterItem.checked;\r\n      } else if (itemChecked !== filterItem.checked) {\r\n        itemChecked = undefined;\r\n        break;\r\n      }\r\n    }\r\n\r\n    if (itemChecked === null) {\r\n      itemChecked = false;\r\n    }\r\n\r\n    this.allItem.checked = itemChecked;\r\n  }\r\n\r\n  private updateCollapsedOfAll(): void {\r\n    let hasItemExpanded = false;\r\n    for (const filterItem of this.filterItems) {\r\n      if (!filterItem.collapsed) {\r\n        hasItemExpanded = true;\r\n        break;\r\n      }\r\n    }\r\n\r\n    this.allItem.collapsed = !hasItemExpanded;\r\n  }\r\n}\r\n"]}