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import { Component, ContentChildren, QueryList, AfterContentInit, Input, Output, EventEmitter } from '@angular/core';
import { Tab } from './tab/tab.component';
import { ViewEncapsulation } from '@angular/core';
import { trigger, state, style, transition, animate, keyframes } from '@angular/core';
@Component({
selector: 'tabs',
templateUrl: './tabs.component.html',
styleUrls: ['./tabs.component.less'],
encapsulation: ViewEncapsulation.None,
animations: [
trigger('indicatorAnimation', [
transition(':enter', [style({ transform: 'translateY(-50%)', opacity: 0 }), animate('250ms', style({ transform: 'translateY(0)', opacity: 1 })) ]),
transition(':leave', [style({ opacity: 1 }), animate('500ms', style({ opacity: 0 })) ])
])
]
})
export class Tabs implements AfterContentInit {
@Input() tabStyle: string;
@Input() hideIndicationOnTabChange?: boolean = false;
@ContentChildren(Tab) tabs: QueryList<Tab>;
@Output() tabChanged: EventEmitter<Tab> = new EventEmitter<Tab>();
ngAfterContentInit() {
//after contentChildren are set, determine active tab. If no active tab set, activate the first one
let activeTabs = this.tabs.filter((tab) => tab.active);
if (activeTabs.length === 0) {
this.selectTab(this.tabs.first);
}
}
selectTab(tab: Tab) {
//activate the tab the user clicked.
this.tabs.toArray().forEach(tab => {
tab.active = false;
if (this.hideIndicationOnTabChange && tab.indication) {
tab.indication = null;
}
});
tab.active = true;
this.tabChanged.emit(tab);
}
triggerTabChange(tabTitle) {
this.tabs.toArray().forEach(tab => {
tab.active = (tab.title == tabTitle) ? true : false;
});
}
setTabIndication(tabTitle:string, indication?:number) {
let selectedTab: Tab = this.tabs.toArray().find(tab => tab.title == tabTitle);
selectedTab.indication = indication || null;
}
}
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