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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 | import { Optional, Component, OnInit, AfterViewInit, OnChanges, OnDestroy } from '@angular/core'; import { Input, forwardRef } from '@angular/core'; import { Output, EventEmitter } from '@angular/core'; import { ContentChildren, QueryList } from '@angular/core'; import { ChangeDetectionStrategy, ChangeDetectorRef } from '@angular/core'; import { AbstractControl, FormGroup, FormGroupDirective } from '@angular/forms'; import { ControlContainer, ControlValueAccessor } from "@angular/forms"; import { NG_VALUE_ACCESSOR } from "@angular/forms"; import { Subscription } from 'rxjs'; /*************************************/ /* UPP-SELECT-OPTION COMPONENT */ /*************************************/ /** * Represents an option within the `upp-select` component. */ @Component({ selector: 'upp-select-option', templateUrl: './parts/upp-option.html', styleUrls: ['./upp-select.scss'], }) export class UppSelectOptionComponent { /** The value associated with this option. */ @Input() value: any = null; /** Event emitted when the option is selected. */ @Output() Select = new EventEmitter <any> (); /** * Emits the `Select` event with the current value when selected. */ OnSelect(){ this.Select.emit(this.value); } } /*************************************/ /* UPP-SELECT-LIST COMPONENT */ /*************************************/ /** * Represents a list of `upp-select-option` components. */ @Component({ selector: 'upp-select-list', templateUrl: './parts/upp-list.html', styleUrls: ['./upp-select.scss'], }) export class UppSelectListComponent implements AfterViewInit, OnDestroy { private _option_subscription: Subscription | null = null; /** * Lifecycle hook that unsubscribes from subscriptions when the component is destroyed. */ ngOnDestroy(): void { Iif (this._option_subscription){ this._option_subscription.unsubscribe(); this._option_subscription = null; } } /** Event emitted when an option is selected from the list. */ @Output() Select = new EventEmitter <any> (); private OnSelect(value: any){ this.Select.emit(value); } /** Query list of `upp-select-option` components within this list. */ @ContentChildren(UppSelectOptionComponent) options!: QueryList<UppSelectOptionComponent>; /** * Lifecycle hook that sets up option listeners after the view initializes. */ ngAfterViewInit() { this._OptionListeners(); Iif (this._option_subscription){ this._option_subscription.unsubscribe(); this._option_subscription = null; } this._option_subscription = this.options.changes.subscribe(() => { this._OptionListeners(); }); } private _OptionListeners() { this.options.forEach(option => { option.Select.subscribe(value => { this.OnSelect(value); }); }); } private _expand = false; /** * Whether the list is expanded. */ get IsExpand(): boolean { return this._expand; } set IsExpand(value: boolean){ this._expand = value; } /** * Expands or collapses the list. */ Expand(value: boolean){ this.IsExpand = value; } } /*************************************/ /* UPP-SELECT-ITEM COMPONENT */ /*************************************/ /** * Represents an item in the `upp-select` component. */ @Component({ selector: 'upp-select-item', templateUrl: './parts/upp-item.html', styleUrls: ['./upp-select.scss'], }) export class UppSelectItemComponent { /** Event emitted when the item is expanded. */ @Output() Expand = new EventEmitter <boolean> (); private _expand = false; /** * Whether the item is expanded. */ get IsExpand(): boolean { return this._expand; } set IsExpand(value: boolean) { this._expand = value; } /** * Expands or collapses the item. */ OnExpand(value: boolean){ Iif (this.IsExpand != value){ this.IsExpand = value; this.Expand.emit(this.IsExpand); } } } /*************************************/ /* UPP-SELECT COMPONENT */ /*************************************/ /** * The main `upp-select` component. * Implements `ControlValueAccessor` for form control integration. */ @Component({ selector: 'upp-select', changeDetection: ChangeDetectionStrategy.OnPush, templateUrl:'./upp-select.html', styleUrls: [ './upp-select.scss' ], providers: [ { provide: NG_VALUE_ACCESSOR, useExisting: forwardRef(() => UppSelectComponent), multi: true } ] }) export class UppSelectComponent implements ControlValueAccessor, OnInit, AfterViewInit, OnChanges, OnDestroy { /** The name of the form control this input is bound to. */ @Input() formControlName = ''; /** Disables the input when set to true. */ @Input() disabled = false; /** Emits the current value when it changes. */ @Output() Changed = new EventEmitter<any>(); /** Emits an event when the input gains focus. */ @Output() Focus = new EventEmitter<void>(); /** optional FromGroup */ public formGroup: FormGroup | null = null public formControl: AbstractControl | null = null; private _innerValue: any = null; /* eslint-disable @typescript-eslint/no-unused-vars */ /** Callback to notify Angular Forms when the value changes. */ private _onChangeCallback = (v: any) => { // nothing to do (required by angular) } /** Callback to notify Angular Forms when the input is touched. */ private _onTouchCallback = () => { // nothing to do (required by angular) } /* eslint-enable @typescript-eslint/no-unused-vars */ /** * Constructor for dependency injection. * @param controlContainer Provides access to the parent form group. * @param change A service to trigger manual change detection. */ constructor(@Optional() private controlContainer: ControlContainer, private change: ChangeDetectorRef) { // nothing to do } private _form_subscription: Subscription | null = null; private _list_subscription: Subscription | null = null; private _item_subscription: Subscription | null = null; /** * Lifecycle hook that initializes the component. * Sets up form control integration and initializes the value. */ ngOnInit() { this._innerValue = this.value; Iif (this.controlContainer && this.controlContainer instanceof FormGroupDirective){ this.formGroup = this.controlContainer.form; } this.formControl = (this.formGroup && this.formControlName) ? this.formGroup.get(this.formControlName) : null; Iif (this.formControl){ this.value = this.formControl.value || null; this._form_subscription = this.formControl.valueChanges.subscribe( () => { this.value = this.formControl?.value || null; }); } this.onChange(); } /** Query list of child `upp-select-item` components. */ @ContentChildren(UppSelectItemComponent) items!: QueryList<UppSelectItemComponent>; /** Query list of child `upp-select-list` components. */ @ContentChildren(UppSelectListComponent) lists!: QueryList<UppSelectListComponent>; /** * Lifecycle hook that runs after the component’s view has been initialized. * It sets up listeners for child components. */ ngAfterViewInit() { this._ItemListeners(); this._ListListeners(); Iif (this._item_subscription){ this._item_subscription.unsubscribe(); this._item_subscription = null; } Iif (this._list_subscription){ this._list_subscription.unsubscribe(); this._list_subscription = null; } this._item_subscription = this.items.changes.subscribe(() => { this._ItemListeners(); }); this._list_subscription = this.lists.changes.subscribe(() => { this._ListListeners(); }); } /** * Sets up event listeners for `upp-select-item` components. * Expands or collapses the corresponding lists when an item is expanded. */ private _ItemListeners() { this.items.forEach(item => { item.Expand.subscribe(value => { for (const list of this.lists){ list.Expand(value); } }); }); } /** * Sets up event listeners for `upp-select-list` components. * Updates the selected value when a list item is selected. */ private _ListListeners() { this.lists.forEach(list => { list.Select.subscribe(value => { this.value = value; }); }); } /** * Lifecycle hook that detects changes to the input's properties. */ ngOnChanges() { this.onChange(); } /** * Lifecycle hook that cleans up resources on component destruction. * Unsubscribes from form control value changes. */ ngOnDestroy() { Iif (this._form_subscription){ this._form_subscription.unsubscribe(); this._form_subscription = null; } Iif (this._item_subscription){ this._item_subscription.unsubscribe(); this._item_subscription = null; } Iif (this._list_subscription){ this._list_subscription.unsubscribe(); this._list_subscription = null; } } /** * Handles value change events and triggers UI updates. */ onChange(): void { this.Changed.emit(this._innerValue); Iif (this.items){ this.items.forEach(item => { item.OnExpand(false); }); } this.change.markForCheck(); } /** * Emits a focus event when the input gains focus. */ onFocus(): void { this.Focus.emit(); } /********************************************/ /* disable control */ /********************************************/ /** * Determines whether the input is disabled. * @returns {boolean} True if the input is disabled; otherwise, false. */ get _disabled(): boolean { // if directly disabled, return true Iif (this.disabled){ return true; } // check if the the form control is disabled const _formcontrol = (this.formGroup && this.formControlName) ? this.formGroup.get(this.formControlName) : null; Iif (_formcontrol){ return _formcontrol.disabled; } // not disabled return false; } /********************************************/ /* get/set accesors */ /********************************************/ @Input() /** * Gets the current value of the input. * @returns {string} The current value of the input. */ get value(): string { return this._innerValue; } /** * Sets a new value for the input. * Updates the internal value, notifies Angular Forms, and triggers value change events. * @param {string} v - The new value to set. */ set value(v: string) { Iif (v !== this._innerValue) { this._innerValue = v; this.onChange(); this._onChangeCallback(v); this._onTouchCallback(); } } /********************************************/ /* ControlValueAccessor */ /********************************************/ /** * Writes a value to the input. Required by `ControlValueAccessor`. * @param {string} value - The value to write. */ writeValue(value: string) { Iif (value !== this._innerValue) { this.value = value; this.onChange(); } } /** * Registers a callback function to be called when the input value changes. * Required by `ControlValueAccessor`. * @param {Function} fn - The callback function. */ registerOnChange(fn: any) { this._onChangeCallback = fn; } /** * Registers a callback function to be called when the input is touched. * Required by `ControlValueAccessor`. * @param {Function} fn - The callback function. */ registerOnTouched(fn: any) { this._onTouchCallback = fn; } } |