將鼠標懸停在列表上時，傳單打開彈出窗口

Question

我的應用程序的一個視圖是，一側是所有引腳的列表，另一側是帶有實際引腳的地圖。

當我用鼠標懸停在列表中時，我希望彈出窗口打開。 假設我的鼠標位於列表中的 #1 我希望相應引腳的彈出窗口打開。

這是列表組件中的 html：

    <table class="table-striped">
      <thead>
        <!-- <th>id</th> -->
        <th>Kunstwerkname</th>
        <th>Strasse</th>
        <th>PLZ</th>
        <th>
          <button class="button-list" (click)="addArtwork()">
            <img src="assets/icons/add.svg">
          </button>
        </th>
      </thead>
      <tbody>
        <tr *ngFor="let artwork of artworkList;" class="artworkList" (mouseover)="previewPopup(artwork)">
          <td>{{artwork.name}}</td>
          <td>{{artwork.streetname}}</td>
          <td>{{artwork.zipcode}}</td>
          <td>
            <button class="button-list" (click)="editArtwork(artwork)">
              <img src="assets/icons/edit.svg">
            </button>
            <button class="button-list" (click)="deleteArtwork(artwork)">
              <img src="assets/icons/delete.svg">
            </button>
          </td>
        </tr>
      </tbody>
    </table>

列表組件的 ts：

import { Artwork, ArtworkService } from './../_services/artwork.service';
import { Component, OnInit, Output, EventEmitter } from '@angular/core';


@Component({
  selector: 'app-artwork-list',
  templateUrl: './artwork-list.component.html',
  styleUrls: ['./artwork-list.component.css']
})
export class ArtworkListComponent implements OnInit {
  @Output() private add = new EventEmitter();
  @Output() private edit = new EventEmitter<number>();
  @Output() private preview = new EventEmitter<number>();
  artworkList: Artwork[];

  constructor(
    private artworkService: ArtworkService,
) { }

  ngOnInit() {
    this.refresh();
  }
  refresh() {
    this.artworkService.retrieveAll().then(
      artworkList => this.artworkList = artworkList
    );
  }

  addArtwork() {
    console.log('add artwork');
    this.add.emit();
  }

  editArtwork(artwork: Artwork) {
    console.log('edit artwork ' + artwork.name + ' ' + artwork.id );
    this.edit.emit(artwork.id);
  }

  deleteArtwork(artwork: Artwork) {
    console.log('delete artwork ' + artwork.name + ' ' + artwork.id );
    this.artworkService.delete(artwork.id).then(
      () => this.refresh()
    );
  }

  previewPopup(artwork: Artwork) {
    console.log("hovering mouse");
    console.log(artwork.id);
    this.preview.emit(artwork.id);
  }

}

和地圖組件的 ts ：

import { Component, OnInit, Output, EventEmitter, ElementRef, Input } from '@angular/core';

/*When you include the leaflet script inside the Angular project, it gets
loaded and exported into a L variable.*/
declare let L; //this is the leaflet variable!

import { MapButtonsComponent } from './map-buttons/map-buttons';
import { Artwork, ArtworkService } from '../_services/artwork.service';
import { FilterMapComponent } from './filter-map/filter-map.component';



@Component({
  selector: 'app-open-street-map',
  templateUrl: './open-street-map.component.html',
  styleUrls: ['./open-street-map.component.css']
})
export class OpenStreetMapComponent implements OnInit {
  @Output() private add = new EventEmitter();
  @Output() private edit = new EventEmitter<number>();
  artworkList: Artwork[];
  map;

  // markerIcon
  markerIcon = {
    icon: L.icon({
      iconSize: [25, 41],
      iconAnchor: [13, 16],
      iconUrl: 'assets/icons/marker.svg',
      shadowUrl: 'assets/icons/marker-shadow.png'
    })
  };

  constructor(
    private artworkService: ArtworkService,
    private elementRef: ElementRef
  ) { }

  ngOnInit() {
    this.map = L.map('map', {
      center: [48.208, 16.373],
      zoom: 13,
      zoomControl: false,
    });

    this.refresh();

    // base layer
    L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token={accessToken}', {
      attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
      maxZoom: 18,
      minZoom: 13,
      id: 'mapbox.streets',
      accessToken: 'pk.eyJ1IjoicHcxN2wwMDgiLCJhIjoiY2pua2c2OWxuMGVkOTNxbWh5MWNqajEwdyJ9.X_SuGwNGs12TwCsrsUvBxw'
    }).addTo(this.map);

    MapButtonsComponent.renderZoom(this.map);
    MapButtonsComponent.renderCompass(this.map);
    MapButtonsComponent.renderLocation(this.map);
  }

  previewArtwork() {
   this.map.eachLayer(layer => {
  if (layer instanceof L.Marker) {
    this.map.removeLayer(layer);
  }
});
let previewedMarker = L.marker([artwork.latitude, artwork.longitude], this.markerIcon)
  .addTo(this.map)
  .on('mouseover', () => {
    openPopup();
  });
}

  }
}

Answer 1

可以考慮以下方法。 讓我們假設標記的初始數據以以下格式表示：

locations = [
    {
      name: "Oslo",
      lat: 59.923043,
      lng: 10.752839
    },
    {
      name: "Stockholm",
      lat: 59.339025,
      lng: 18.065818
    },
    //..
  ];

然后對於地圖上的給定數據標記可以像這樣初始化：

this.markers = this.locations.map(loc => {
    const marker = new L.marker({ lat: loc.lat, lng: loc.lng });
    marker.bindPopup(loc.name);
    marker.addTo(map);
    return marker;
}); 

現在輪到選擇器組件和地圖本身之間的通信，讓我們假設以下選擇器：

<ul>
  <li (mouseenter) ="mouseEnter(idx) "  (mouseleave) ="mouseLeave(idx)"  *ngFor="let loc of locations; let idx = index">{{ loc.name }}</li>
</ul>

那么彈出可見性可以這樣控制：

mouseEnter(selectedIndex) {
   const selectedMarker = this.markers[selectedIndex];
  selectedMarker.openPopup();
}

mouseLeave(selectedIndex) {
   const selectedMarker = this.markers[selectedIndex];
   selectedMarker.closePopup();
}

這是一個演示

Answer 2

而不是使用mouseover你必須聽mouseenter和mouseleave

在mouseenter您將創建一個彈出窗口並將其放置在地圖上，在mouseleave您將關閉彈出窗口

jQuery 示例代碼（我的 postContent 相當於你的作品）

$("div.postContent").on("mouseenter", function(e) {
        var postId = $(this).attr("data-postId");

        tooltipPopup = L.popup();   
        var title = postlistByGlobalId[postId].title;
        tooltipPopup.setContent(title);
        tooltipPopup.setLatLng(markersByGlobalId[postId].getLatLng());
        tooltipPopup.openOn(map);

        $(this).addClass('hover');
    });

$("div.postContent").on("mouseleave", function(e) {
        $(this).removeClass('hover');
        map.closePopup(tooltipPopup);
    });

為了實現這一點，您需要為您的所有作品（在我的示例中為 postId）提供一個唯一的 id，並將您的標記放在一個關聯數組markersByGlobalId

這可能很有用： http : //franceimage.github.io/map和http://franceimage.github.io/map-v1

我的例子是單一的（1 個 html，1 個 js 文件）。 你需要做一些額外的工作才能在你的 Angular 應用程序中使用它。