ngc-scrolling-tabs
Version:
This component is a scrollable responsive tab component build on Angular 8 and Bootstrap 4. The left and right nav buttons will scroll one tab at a time. The component will track what tab is open and re-navigate to the open tab when the screen is refreshe
263 lines • 23.5 kB
JavaScript
/**
* @fileoverview added by tsickle
* Generated from: lib/scrolling-tabs.component.ts
* @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
import { Component, ChangeDetectionStrategy, ChangeDetectorRef, ElementRef, ViewChild, HostListener, Input, Output, EventEmitter } from '@angular/core';
import { Router, ActivatedRoute } from '@angular/router';
export class ScrollingTabsComponent {
/**
* @param {?} changeDetector
* @param {?} route
* @param {?} router
*/
constructor(changeDetector, route, router) {
this.changeDetector = changeDetector;
this.route = route;
this.router = router;
this.firstTabActive = true;
this.scrollToActive = true;
this.trackOpenTab = true;
this.selectedTabChanged = new EventEmitter();
this.tabs = [];
this.leftOffset = 0;
this.firstVisibleTabIndex = -1;
this.showLeftArrow = false;
this.showRightArrow = false;
}
/**
* @return {?}
*/
ngAfterViewInit() {
setTimeout((/**
* @return {?}
*/
() => {
// if there is a param of tabId and we want to track open tabs mark the open tab as active
if (this.route.snapshot.queryParams.tabId && this.trackOpenTab) {
this.markTabAsActive(this.route.snapshot.queryParams.tabId);
}
else if (this.firstTabActive) { // if we should mark the first tab as active if a active tab is not specified
this.markFirstTabActive();
}
// scroll to the active tab if setting is true and the tabs are larger than the window
if (this.scrollToActive && this.hasHiddenTabs()) {
this.scrollToActiveTab();
}
this.redrawTabs();
this.changeDetector.detectChanges();
}), 0);
}
/**
* @param {?} tab
* @return {?}
*/
addTab(tab) {
this.tabs.push(tab);
}
/**
* @param {?} tab
* @return {?}
*/
removeTab(tab) {
/** @type {?} */
const index = this.tabs.indexOf(tab);
if (index !== -1) {
this.tabs.splice(index, 1);
}
}
/**
* @return {?}
*/
windowResize() {
this.redrawTabs();
}
/**
* @return {?}
*/
redrawTabs() {
// Take the total width of the list. Subtract how far right we are and see if that is greater than the
// width of the current display
if (this.widthOfList() + this.leftOffset > this.navWrapper.nativeElement.offsetWidth) {
this.showRightArrow = true;
}
else {
this.showRightArrow = false;
}
// see if we have scrolled right and we are not at the left most position
if (this.leftOffset < 0) {
this.showLeftArrow = true;
}
else {
this.showLeftArrow = false;
}
}
/**
* @return {?}
*/
widthOfList() {
/** @type {?} */
let totalWidth = 0;
for (const li of this.tabList.nativeElement.children) {
totalWidth += li.offsetWidth;
}
return totalWidth;
}
/**
* @return {?}
*/
onScrollerLeftClick() {
// we need to go left for the width of the previous tab
this.firstVisibleTabIndex--;
// when moving left the left offset increases
this.leftOffset += this.tabList.nativeElement.children[this.firstVisibleTabIndex].offsetWidth;
this.redrawTabs();
}
/**
* @return {?}
*/
onScrollerRightClick() {
// when moving right you descrease the left offset. We want to go right the length of the current tab
this.leftOffset -= this.tabList.nativeElement.children[this.firstVisibleTabIndex].offsetWidth;
// change the index of the visible tab now that we have moved
this.firstVisibleTabIndex++;
this.redrawTabs();
}
/**
* @param {?} tab
* @return {?}
*/
onSelectedTabChanged(tab) {
this.markTabAsActive(tab.id);
if (this.trackOpenTab) {
this.pushCurrentTabToParam(tab);
}
this.selectedTabChanged.emit(tab);
}
/**
* @return {?}
*/
markFirstTabActive() {
/** @type {?} */
const activeTab = this.tabs.find((/**
* @param {?} t
* @return {?}
*/
t => t.active));
// if there is no active tab and we have tabs set first one to active
if (!activeTab && this.tabs.length > 0) {
this.tabs[0].active = true;
}
}
/**
* @return {?}
*/
scrollToActiveTab() {
/** @type {?} */
const activeTab = this.tabs.findIndex((/**
* @param {?} t
* @return {?}
*/
t => t.active));
this.firstVisibleTabIndex = activeTab;
for (let i = 0; i < activeTab; i++) {
if (this.tabList.nativeElement.children[i]) {
this.leftOffset -= this.tabList.nativeElement.children[i].offsetWidth;
}
}
}
/**
* @return {?}
*/
hasHiddenTabs() {
return this.widthOfList() > this.navWrapper.nativeElement.offsetWidth;
}
/**
* @param {?} tabId
* @return {?}
*/
markTabAsActive(tabId) {
for (const t of this.tabs) {
t.active = false;
if (t.id === tabId) {
t.active = true;
}
}
}
/**
* @param {?} tab
* @return {?}
*/
pushCurrentTabToParam(tab) {
this.router.navigate([], {
relativeTo: this.route,
queryParams: {
tabId: tab.id
},
queryParamsHandling: 'merge'
});
}
}
ScrollingTabsComponent.decorators = [
{ type: Component, args: [{
selector: 'ngc-scrolling-tabs',
template: "<div class=\"wrap-selector\">\n <div class=\"nav-tabs-boxed\">\n <div class=\"scroller scroller-left\" (click)=\"onScrollerLeftClick()\" *ngIf=\"showLeftArrow\">\n <svg class=\"arrow-img\" xmlns=\"http://www.w3.org/2000/svg\" version=\"1.0\" width=\"157.000000pt\" height=\"263.000000pt\"\n viewBox=\"0 0 157.000000 263.000000\" preserveAspectRatio=\"xMidYMid meet\">\n <g transform=\"translate(0.000000,263.000000) scale(0.100000,-0.100000)\" fill=\"currentColor\" stroke=\"none\">\n <path d=\"M653 1967 l-603 -602 0 -45 0 -45 603 -602 c710 -711 628 -655 764 -520 79 79 83 85 83 127 l0 45 -497 497 -498 498 498 498 497 497 0 45 c0 42 -4 48 -83 127 -136 135 -54 191 -764 -520z\" />\n </g>\n </svg>\n </div>\n <div class=\"scroller scroller-right\" (click)=\"onScrollerRightClick()\" *ngIf=\"showRightArrow\">\n <svg class=\"arrow-img\" xmlns=\"http://www.w3.org/2000/svg\" version=\"1.0\" width=\"157.000000pt\" height=\"263.000000pt\"\n viewBox=\"0 0 157.000000 263.000000\" preserveAspectRatio=\"xMidYMid meet\">\n <g transform=\"translate(0.000000,263.000000) scale(0.100000,-0.100000)\" fill=\"currentColor\" stroke=\"none\">\n <path d=\"M153 2477 c-79 -79 -83 -85 -83 -127 l0 -45 497 -497 498 -498 -498 -498 -497 -497 0 -45 c0 -42 4 -48 83 -127 136 -135 54 -191 764 520 l603 602 0 45 0 45 -603 602 c-710 711 -628 655 -764 520z\" />\n </g>\n </svg>\n </div>\n <div class=\"nav-wrapper\" #navWrapper>\n <ul class=\"nav nav-tabs list\" role=\"tablist\" #tabList [style.left.px]=\"leftOffset\">\n <li *ngFor=\"let tab of tabs\" class=\"nav-item\">\n <a [ngClass]=\"tab.getTabClasses()\" data-toggle=\"tab\" href=\"javascript:void(0)\" role=\"tab\"\n attr.aria-controls=\"{{tab.title}}\" (click)=\"onSelectedTabChanged(tab)\">{{tab.title}}</a>\n </li>\n </ul>\n </div>\n <div class=\"tab-content\">\n <ng-content></ng-content>\n </div>\n </div>\n</div>",
changeDetection: ChangeDetectionStrategy.OnPush,
styles: [".nav-wrapper{position:relative;margin:0 auto;overflow:hidden;padding:5px;height:38px}.nav-tabs{height:38px;margin-left:1px}.tab-content{margin-left:1px}.list{position:absolute;left:0;top:0;min-width:3000px;margin-top:0}.list li{display:table-cell;position:relative;text-align:center;cursor:grab;cursor:-webkit-grab;color:#efefef;vertical-align:middle}.scroller{text-align:center;cursor:pointer;padding:7px;white-space:no-wrap;vertical-align:middle}.scroller-right{float:right}.scroller-left{float:left}.arrow-img{height:20px;width:15px}.arrow-img:hover{opacity:.5}"]
}] }
];
/** @nocollapse */
ScrollingTabsComponent.ctorParameters = () => [
{ type: ChangeDetectorRef },
{ type: ActivatedRoute },
{ type: Router }
];
ScrollingTabsComponent.propDecorators = {
navWrapper: [{ type: ViewChild, args: ['navWrapper', { static: false },] }],
tabList: [{ type: ViewChild, args: ['tabList', { static: false },] }],
firstTabActive: [{ type: Input }],
scrollToActive: [{ type: Input }],
trackOpenTab: [{ type: Input }],
selectedTabChanged: [{ type: Output }],
windowResize: [{ type: HostListener, args: ['window:resize',] }]
};
if (false) {
/** @type {?} */
ScrollingTabsComponent.prototype.navWrapper;
/** @type {?} */
ScrollingTabsComponent.prototype.tabList;
/** @type {?} */
ScrollingTabsComponent.prototype.firstTabActive;
/** @type {?} */
ScrollingTabsComponent.prototype.scrollToActive;
/** @type {?} */
ScrollingTabsComponent.prototype.trackOpenTab;
/** @type {?} */
ScrollingTabsComponent.prototype.selectedTabChanged;
/** @type {?} */
ScrollingTabsComponent.prototype.tabs;
/** @type {?} */
ScrollingTabsComponent.prototype.leftOffset;
/** @type {?} */
ScrollingTabsComponent.prototype.firstVisibleTabIndex;
/** @type {?} */
ScrollingTabsComponent.prototype.showLeftArrow;
/** @type {?} */
ScrollingTabsComponent.prototype.showRightArrow;
/**
* @type {?}
* @private
*/
ScrollingTabsComponent.prototype.changeDetector;
/**
* @type {?}
* @private
*/
ScrollingTabsComponent.prototype.route;
/**
* @type {?}
* @private
*/
ScrollingTabsComponent.prototype.router;
}
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{ Component, ChangeDetectionStrategy, ChangeDetectorRef, ElementRef,\n         ViewChild, AfterViewInit, HostListener, Input, Output, EventEmitter } from '@angular/core';\nimport { Router, ActivatedRoute } from '@angular/router';\n\nimport { ScrollingTabDirective } from './scrolling-tab.directive';\n\n@Component({\n  selector: 'ngc-scrolling-tabs',\n  templateUrl: './scrolling-tabs.component.html',\n  styleUrls: ['./scrolling-tabs.component.css'],\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class ScrollingTabsComponent implements AfterViewInit {\n  @ViewChild('navWrapper', { static: false }) navWrapper: ElementRef;\n  @ViewChild('tabList', { static: false }) tabList: ElementRef;\n\n  @Input() firstTabActive = true;\n  @Input() scrollToActive = true;\n  @Input() trackOpenTab = true;\n  @Output() selectedTabChanged = new EventEmitter<ScrollingTabDirective>();\n\n  tabs: ScrollingTabDirective[] = [];\n  leftOffset = 0;\n  firstVisibleTabIndex = -1;\n  showLeftArrow = false;\n  showRightArrow = false;\n\n  constructor(private changeDetector: ChangeDetectorRef, private route: ActivatedRoute, private router: Router) { }\n\n  ngAfterViewInit(): void {\n    setTimeout(() => {\n      // if there is a param of tabId and we want to track open tabs mark the open tab as active\n      if (this.route.snapshot.queryParams.tabId && this.trackOpenTab) {\n        this.markTabAsActive(this.route.snapshot.queryParams.tabId);\n      } else if (this.firstTabActive) { // if we should mark the first tab as active if a active tab is not specified\n        this.markFirstTabActive();\n      }\n\n      // scroll to the active tab if setting is true and the tabs are larger than the window\n      if (this.scrollToActive && this.hasHiddenTabs()) {\n        this.scrollToActiveTab();\n      }\n      this.redrawTabs();\n      this.changeDetector.detectChanges();\n    }, 0);\n  }\n\n  addTab(tab: ScrollingTabDirective) {\n    this.tabs.push(tab);\n  }\n\n  removeTab(tab: ScrollingTabDirective) {\n    const index = this.tabs.indexOf(tab);\n    if (index !== -1) {\n      this.tabs.splice(index, 1);\n    }\n  }\n\n  @HostListener('window:resize')\n  windowResize() {\n    this.redrawTabs();\n  }\n\n  redrawTabs() {\n    // Take the total width of the list. Subtract how far right we are and see if that is greater than the\n    // width of the current display\n    if (this.widthOfList() + this.leftOffset > this.navWrapper.nativeElement.offsetWidth) {\n      this.showRightArrow = true;\n    } else {\n      this.showRightArrow = false;\n    }\n\n    // see if we have scrolled right and we are not at the left most position\n    if (this.leftOffset < 0) {\n      this.showLeftArrow = true;\n    } else {\n      this.showLeftArrow = false;\n    }\n  }\n\n  widthOfList() {\n    let totalWidth = 0;\n    for (const li of this.tabList.nativeElement.children) {\n      totalWidth += li.offsetWidth;\n    }\n    return totalWidth;\n  }\n\n  onScrollerLeftClick() {\n    // we need to go left for the width of the previous tab\n    this.firstVisibleTabIndex--;\n    // when moving left the left offset increases\n    this.leftOffset += this.tabList.nativeElement.children[this.firstVisibleTabIndex].offsetWidth;\n    this.redrawTabs();\n  }\n\n  onScrollerRightClick() {\n    // when moving right you descrease the left offset. We want to go right the length of the current tab\n    this.leftOffset -= this.tabList.nativeElement.children[this.firstVisibleTabIndex].offsetWidth;\n    // change the index of the visible tab now that we have moved\n    this.firstVisibleTabIndex++;\n    this.redrawTabs();\n  }\n\n  onSelectedTabChanged(tab: ScrollingTabDirective) {\n    this.markTabAsActive(tab.id);\n    if (this.trackOpenTab) {\n      this.pushCurrentTabToParam(tab);\n    }\n    this.selectedTabChanged.emit(tab);\n  }\n\n  markFirstTabActive() {\n    const activeTab = this.tabs.find(t => t.active);\n    //  if there is no active tab and we have tabs set first one to active\n    if (!activeTab && this.tabs.length > 0) {\n      this.tabs[0].active = true;\n    }\n  }\n\n  scrollToActiveTab() {\n    const activeTab = this.tabs.findIndex(t => t.active);\n    this.firstVisibleTabIndex = activeTab;\n    for (let i = 0; i < activeTab; i++) {\n      if (this.tabList.nativeElement.children[i]) {\n        this.leftOffset -= this.tabList.nativeElement.children[i].offsetWidth;\n      }\n    }\n  }\n\n  hasHiddenTabs() {\n    return this.widthOfList() > this.navWrapper.nativeElement.offsetWidth;\n  }\n\n  markTabAsActive(tabId: any) {\n    for (const t of this.tabs) {\n      t.active = false;\n      if (t.id === tabId) {\n        t.active = true;\n      }\n    }\n  }\n\n  pushCurrentTabToParam(tab: ScrollingTabDirective) {\n    this.router.navigate([], {\n      relativeTo: this.route,\n      queryParams: {\n        tabId: tab.id\n      },\n      queryParamsHandling: 'merge'\n    });\n  }\n}\n"]}