| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| import { Component, Input, Output, EventEmitter, OnChanges, SimpleChanges } from '@angular/core'; |
| import { ListItem } from '@app/classes/list-item'; |
| import { UtilsService } from '@app/services/utils.service'; |
| |
| @Component({ |
| selector: 'dropdown-button', |
| templateUrl: './dropdown-button.component.html', |
| styleUrls: ['./dropdown-button.component.less'] |
| }) |
| export class DropdownButtonComponent implements OnChanges { |
| @Input() |
| label?: string; |
| |
| @Input() |
| buttonClass = 'btn-link'; |
| |
| @Input() |
| iconClass?: string; |
| |
| @Input() |
| hideCaret = false; |
| |
| @Input() |
| showSelectedValue = true; |
| |
| @Input() |
| isRightAlign = false; |
| |
| @Input() |
| isDropup = false; |
| |
| @Input() |
| showCommonLabelWithSelection = false; |
| |
| @Output() |
| selectItem: EventEmitter<any> = new EventEmitter(); |
| |
| // PROXY PROPERTIES TO DROPDOWN LIST COMPONENT |
| @Input() |
| options: ListItem[] = []; |
| |
| @Input() |
| listItemArguments: any[] = []; |
| |
| @Input() |
| isMultipleChoice = false; |
| |
| @Input() |
| useClearToDefaultSelection = false; |
| |
| @Input() |
| showTotalSelection = false; |
| |
| @Input() |
| useDropDownLocalFilter = false; |
| |
| @Input() |
| closeOnSelection = true; |
| |
| @Input() |
| disabled = false; |
| |
| protected selectedItems: ListItem[] = []; |
| |
| get selection(): ListItem[] { |
| return this.selectedItems; |
| } |
| |
| set selection(items: ListItem[]) { |
| this.selectedItems = <ListItem[]>(Array.isArray(items) ? items : items || []); |
| if (this.selectedItems.length > 1 && !this.isMultipleChoice) { |
| this.selectedItems = this.selectedItems.slice(0, 1); |
| } |
| if (this.isMultipleChoice && this.options) { |
| this.options.forEach( |
| (option: ListItem): void => { |
| const selectionItem = this.selectedItems.find( |
| (item: ListItem): boolean => this.utils.isEqual(item.value, option.value) |
| ); |
| option.isChecked = !!selectionItem; |
| } |
| ); |
| } |
| } |
| |
| get hasSelection(): boolean { |
| return this.selectedItems.length > 0; |
| } |
| |
| get totalSelection(): number { |
| return this.selectedItems.length; |
| } |
| |
| // TODO handle case of selections with multiple items |
| /** |
| * Indicates whether selection can be displayed at the moment, i.e. it's not empty, not multiple |
| * and set to be displayed by showSelectedValue flag |
| * @returns {boolean} |
| */ |
| get isSelectionDisplayable(): boolean { |
| return this.showSelectedValue && !this.isMultipleChoice && this.hasSelection; |
| } |
| |
| get value(): any { |
| const values = this.selectedItems && this.selectedItems.length && this.selectedItems.map(item => item.value); |
| return this.isMultipleChoice ? values : values[0]; |
| } |
| |
| constructor(protected utils: UtilsService) {} |
| |
| ngOnChanges(changes: SimpleChanges) { |
| if (changes.options) { |
| this.hanldeOptionsChange(); |
| } |
| } |
| |
| hanldeOptionsChange() { |
| this.filterAndSetSelection(); |
| } |
| |
| clearSelection(silent: boolean = false) { |
| let hasChange = false; |
| this.options.forEach((item: ListItem) => { |
| hasChange = hasChange || item.isChecked; |
| item.isChecked = false; |
| }); |
| if (!silent && hasChange) { |
| this.selectItem.emit(this.isMultipleChoice ? [] : undefined); |
| } |
| } |
| |
| updateSelection(updates: ListItem | ListItem[]): boolean { |
| let hasChange = false; |
| if (updates && (!Array.isArray(updates) || updates.length)) { |
| const items: ListItem[] = Array.isArray(updates) ? updates : [updates]; |
| if (this.isMultipleChoice) { |
| items.forEach((item: ListItem) => { |
| if (this.options && this.options.length) { |
| const itemToUpdate: ListItem = this.options.find((option: ListItem) => |
| this.utils.isEqual(option.value, item.value) |
| ); |
| if (itemToUpdate) { |
| hasChange = hasChange || itemToUpdate.isChecked !== item.isChecked; |
| itemToUpdate.isChecked = item.isChecked; |
| } |
| } |
| }); |
| } else { |
| const selectedItem: ListItem = Array.isArray(updates) ? updates[0] : updates; |
| this.options.forEach((item: ListItem) => { |
| const checkedStateBefore = item.isChecked; |
| item.isChecked = this.utils.isEqual(item.value, selectedItem.value); |
| hasChange = hasChange || checkedStateBefore !== item.isChecked; |
| }); |
| } |
| } else { |
| this.options.forEach((item: ListItem) => (item.isChecked = false)); |
| } |
| this.filterAndSetSelection(); |
| if (hasChange) { |
| const selectedValues = this.selection.map((option: ListItem): any => option.value); |
| this.selectItem.emit(this.isMultipleChoice ? selectedValues : selectedValues.shift()); |
| } |
| return hasChange; |
| } |
| |
| protected filterAndSetSelection() { |
| const checkedItems = this.options.filter((option: ListItem): boolean => option.isChecked); |
| this.selection = checkedItems; |
| } |
| } |