@progress/kendo-angular-treeview
Version:
Kendo UI TreeView for Angular
161 lines (160 loc) • 6.42 kB
JavaScript
/**-----------------------------------------------------------------------------------------
* Copyright © 2025 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
import { Directive, EventEmitter, HostBinding, Input, Output } from '@angular/core';
import { TreeViewComponent } from '../treeview.component';
import { isBoolean, isPresent, noop } from '../utils';
import { Subscription } from 'rxjs';
import { isChanged } from '@progress/kendo-angular-common';
import { NavigationService } from '../navigation/navigation.service';
import * as i0 from "@angular/core";
import * as i1 from "../treeview.component";
import * as i2 from "../navigation/navigation.service";
/**
* A directive which manages the in-memory selection state of the TreeView node
* ([see example]({% slug selection_treeview %})).
*/
export class SelectDirective {
treeView;
navigationService;
/**
* @hidden
*/
set isSelected(value) {
this.treeView.isSelected = value;
}
/**
* Defines the item key that will be stored in the `selectedKeys` collection.
*/
selectKey;
/**
* Defines the current selection mode
* ([see example](slug:selection_treeview#toc-modes)).
*/
selection;
/**
* Defines the collection that will store the selected keys
* ([see example](slug:selection_treeview#toc-modes)).
*/
selectedKeys;
/**
* Fires when the `selectedKeys` collection was updated.
*/
selectedKeysChange = new EventEmitter();
get getAriaMultiselectable() {
return this.options.mode === 'multiple';
}
subscriptions = new Subscription();
get options() {
const defaultOptions = {
enabled: true,
mode: 'single'
};
if (!isPresent(this.selection) || typeof this.selection === 'string') {
return defaultOptions;
}
const selectionSettings = isBoolean(this.selection) ? { enabled: this.selection } : this.selection;
return Object.assign(defaultOptions, selectionSettings);
}
selectActions = {
'multiple': (e) => this.selectMultiple(e),
'single': (e) => this.selectSingle(e)
};
/**
* Reflectes the internal `selectedKeys` state.
*/
state = new Set();
/**
* Holds the last emitted `selectedKeys` collection.
*/
lastChange;
constructor(treeView, navigationService) {
this.treeView = treeView;
this.navigationService = navigationService;
this.subscriptions.add(this.treeView.selectionChange.subscribe(this.select.bind(this)));
this.treeView.isSelected = (dataItem, index) => (this.state.has(this.itemKey({ dataItem, index })));
this.navigationService.deselectAllButCurrentItem.subscribe((node) => {
this.selectSingle(node);
});
}
ngOnChanges(changes) {
if (isChanged('selectedKeys', changes, false) && changes['selectedKeys'].currentValue !== this.lastChange) {
this.state = new Set(changes['selectedKeys'].currentValue);
}
const isSelectionBooleanTrue = typeof this.selection === 'boolean' && this.selection;
this.navigationService.selection = isSelectionBooleanTrue ? 'single' : this.selection?.mode;
}
ngOnDestroy() {
this.subscriptions.unsubscribe();
}
itemKey(e) {
if (!this.selectKey) {
return e.index;
}
if (typeof this.selectKey === 'string') {
return e.dataItem[this.selectKey];
}
if (typeof this.selectKey === 'function') {
return this.selectKey(e);
}
}
select(e) {
const { enabled, mode } = this.options;
const performSelection = this.selectActions[mode] || noop;
if (!enabled) {
return;
}
performSelection(e);
}
selectSingle(node) {
const key = this.itemKey(node);
if (!this.state.has(key)) {
this.state.clear();
this.state.add(key);
this.notify();
}
}
selectMultiple(node) {
const key = this.itemKey(node);
const isSelected = this.state.has(key);
if (!isPresent(key)) {
return;
}
if (isSelected) {
this.state.delete(key);
}
else {
this.state.add(key);
}
this.notify();
}
notify() {
this.lastChange = Array.from(this.state);
this.selectedKeysChange.emit(this.lastChange);
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: SelectDirective, deps: [{ token: i1.TreeViewComponent }, { token: i2.NavigationService }], target: i0.ɵɵFactoryTarget.Directive });
static ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.2.12", type: SelectDirective, isStandalone: true, selector: "[kendoTreeViewSelectable]", inputs: { isSelected: "isSelected", selectKey: ["selectBy", "selectKey"], selection: ["kendoTreeViewSelectable", "selection"], selectedKeys: "selectedKeys" }, outputs: { selectedKeysChange: "selectedKeysChange" }, host: { properties: { "attr.aria-multiselectable": "this.getAriaMultiselectable" } }, usesOnChanges: true, ngImport: i0 });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: SelectDirective, decorators: [{
type: Directive,
args: [{
selector: '[kendoTreeViewSelectable]',
standalone: true
}]
}], ctorParameters: function () { return [{ type: i1.TreeViewComponent }, { type: i2.NavigationService }]; }, propDecorators: { isSelected: [{
type: Input
}], selectKey: [{
type: Input,
args: ['selectBy']
}], selection: [{
type: Input,
args: ['kendoTreeViewSelectable']
}], selectedKeys: [{
type: Input
}], selectedKeysChange: [{
type: Output
}], getAriaMultiselectable: [{
type: HostBinding,
args: ['attr.aria-multiselectable']
}] } });