Javascript 角度2在滚动条上的一组组件之间导航
我想通过以下方式更改基于滚动事件的组件:Javascript 角度2在滚动条上的一组组件之间导航,javascript,angular,typescript,angular5,Javascript,Angular,Typescript,Angular5,我想通过以下方式更改基于滚动事件的组件: 如果用户到达组件的末端(滚动位置),则应加载下一个组件 类似地,如果用户到达组件的顶部(滚动位置),则应加载上一个组件 所有这些组件都应具有独立的路由器链路(路径) 因此,如果有2个页面(组件) 组件a和组件b分别具有路径“/a”和“/b” 它们应该加载到组件(父/包装器)中 我正在尝试检测父组件中的这些更改 import { Component, HostListener, ElementRef, Output, EventEmitter, OnI
- 如果用户到达组件的末端(滚动位置),则应加载下一个组件
- 类似地,如果用户到达组件的顶部(滚动位置),则应加载上一个组件
- 所有这些组件都应具有独立的路由器链路(路径)
import { Component, HostListener, ElementRef, Output, EventEmitter, OnInit } from '@angular/core';
import { Router } from "@angular/router"
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: [ './app.component.css' ]
})
export class AppComponent implements OnInit {
@Output() mouseWheelUp = new EventEmitter();
@Output() mouseWheelDown = new EventEmitter();
@HostListener('mousewheel', ['$event']) onMouseWheelChrome(event: any) {
this.mouseWheelFunc(event);
}
@HostListener('DOMMouseScroll', ['$event']) onMouseWheelFirefox(event: any) {
this.mouseWheelFunc(event);
}
@HostListener('onmousewheel', ['$event']) onMouseWheelIE(event: any) {
this.mouseWheelFunc(event);
}
ngOnInit() {
}
mouseWheelFunc(event: any) {
let currentScrollPos = window.pageYOffset;
let elemStartsAt = this.ref.nativeElement.offsetTop;
var delta = Math.max(-1, Math.min(1, (event.wheelDelta || -event.detail)));
if(delta > 0) {
console.log("Up "+currentScrollPos+" "+elemStartsAt);
} else if(delta < 0) {
console.log("Down"+currentScrollPos+" "+elemStartsAt);
}
}
constructor(private router : Router) {}
}
从'@angular/core'导入{Component,HostListener,ElementRef,Output,EventEmitter,OnInit};
从“@angular/Router”导入{Router}
@组成部分({
选择器:“我的应用程序”,
templateUrl:“./app.component.html”,
样式URL:['./app.component.css']
})
导出类AppComponent实现OnInit{
@Output()mouseweellup=neweventemitter();
@Output()mouseWheelDown=新的EventEmitter();
@MouseWheelChrome上的HostListener('mousewheel',['$event'])(事件:任意){
此.mouseweelfunc(事件);
}
@MouseheelFirefox上的HostListener('DOMMouseScroll',['$event'])(事件:any){
此.mouseweelfunc(事件);
}
@HostListener('onmousewheel',['$event'])onMouseWheelIE(事件:任意){
此.mouseweelfunc(事件);
}
恩戈尼尼特(){
}
mouseWheelFunc(事件:任意){
让currentScrollPos=window.pageYOffset;
设elemStartsAt=this.ref.nativeElement.offsetTop;
var delta=Math.max(-1,Math.min(1,(event.wheeldta | | event.detail));
如果(增量>0){
console.log(“向上”+currentScrollPos+“”+elemStartsAt);
}else if(delta<0){
console.log(“向下”+currentScrollPos+“”+elemStartsAt);
}
}
构造函数(专用路由器:路由器){}
}
我找到了解决方案
父组件HTML
<router-outlet></router-outlet>
父组件TS
import { Component, HostListener, ElementRef, Output, EventEmitter, OnInit } from '@angular/core';
import { Router } from "@angular/router"
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: [ './app.component.css' ]
})
export class AppComponent implements OnInit {
public components = ["/1","/2"]; // Path of ordered components
public current : number;
public lastPos : any;
@Output() mouseWheelUp = new EventEmitter();
@Output() mouseWheelDown = new EventEmitter();
@HostListener('mousewheel', ['$event']) onMouseWheelChrome(event: any) {
this.mouseWheelFunc(event);
}
@HostListener('DOMMouseScroll', ['$event']) onMouseWheelFirefox(event: any) {
this.mouseWheelFunc(event);
}
@HostListener('onmousewheel', ['$event']) onMouseWheelIE(event: any) {
this.mouseWheelFunc(event);
}
ngOnInit() {
/** Route to 1 by default */
this.router.navigate(["/1"]);
this.current = 0;
this.lastPos = -1;
}
mouseWheelFunc(event: any) {
// console.log(window.event)
let currentScrollPos = window.pageYOffset;
// let elemStartsAt = this.ref.nativeElement.querySelector('p').offsetTop;
var delta = Math.max(-1, Math.min(1, (event.wheelDelta || -event.detail)));
if(delta > 0) {
// console.log("Up "+currentScrollPos+" "+elemStartsAt);
if (currentScrollPos == 0) {
this.navigateToPrevious();
}
} else if(delta < 0) {
if (currentScrollPos == this.lastPos) {
this.navigateToNext();
} else {
this.lastPos = currentScrollPos;
}
// console.log("Down"+currentScrollPos+" "+elemStartsAt);
}
}
constructor(private router : Router, private ref : ElementRef) {}
private navigateToNext() {
if (this.current + 1 < this.components.length) {
// Next component is available
let path = this.components[++this.current];
this.router.navigate([path]);
}
}
private navigateToPrevious() {
if (this.current > 0) {
let path = this.components[--this.current];
this.router.navigate([path]);
}
}
}
从'@angular/core'导入{Component,HostListener,ElementRef,Output,EventEmitter,OnInit};
从“@angular/Router”导入{Router}
@组成部分({
选择器:“我的应用程序”,
templateUrl:“./app.component.html”,
样式URL:['./app.component.css']
})
导出类AppComponent实现OnInit{
公共组件=[“/1”,“/2”];//有序组件的路径
公共电流:数字;
公共场所:任何;
@Output()mouseweellup=neweventemitter();
@Output()mouseWheelDown=新的EventEmitter();
@MouseWheelChrome上的HostListener('mousewheel',['$event'])(事件:任意){
此.mouseweelfunc(事件);
}
@MouseheelFirefox上的HostListener('DOMMouseScroll',['$event'])(事件:any){
此.mouseweelfunc(事件);
}
@HostListener('onmousewheel',['$event'])onMouseWheelIE(事件:任意){
此.mouseweelfunc(事件);
}
恩戈尼尼特(){
/**默认情况下路由到1*/
this.router.navigate([“/1”]);
该电流=0;
this.lastPos=-1;
}
mouseWheelFunc(事件:任意){
//console.log(window.event)
让currentScrollPos=window.pageYOffset;
//让elemStartsAt=this.ref.nativeElement.querySelector('p').offsetTop;
var delta=Math.max(-1,Math.min(1,(event.wheeldta | | event.detail));
如果(增量>0){
//console.log(“向上”+currentScrollPos+“”+elemStartsAt);
如果(currentScrollPos==0){
this.navigateToPrevious();
}
}else if(delta<0){
if(currentScrollPos==this.lastPos){
this.navigateToNext();
}否则{
this.lastPos=currentScrollPos;
}
//console.log(“向下”+currentScrollPos+“”+elemStartsAt);
}
}
构造函数(专用路由器:路由器,专用引用:ElementRef){}
私有导航下一个(){
如果(此电流+1<此元件长度){
//下一个组件可用
让path=this.components[++this.current];
这个.router.navigate([path]);
}
}
私有导航{
如果(当前值>0){
让path=this.components[--this.current];
这个.router.navigate([path]);
}
}
}
您自己尝试了什么?代码的起点在哪里?我正试图识别两个事件-1)达到顶部2)达到终点