leaflet.draw垃圾按钮删除所有多边形并保存 [英] leaflet.draw trash button delete all polygons and save

问题描述

使用javascript，如何更改leaflet.draw废纸篓按钮以删除已绘制并自动保存的所有多边形。下面是我实现的代码，但它是一个完整的黑客。它删除了活动多边形，但是当我在控制台中出现错误后，当我点击垃圾图标（例如 NotFoundError：未找到节点）时删除对象后 TypeError：this._deletedLayers为null

Using javascript, how can I alter the leaflet.draw "Trash" button to delete all polygons that have been drawn and automatically save. Below is the code I've implemented but it is a complete hack. It removes the active polygon, but after I delete an object once I begin to get errors in the console when I click the "Trash" icon like NotFoundError: Node was not found and TypeError: this._deletedLayers is null

map.on('draw:editstart', function (e) {
            if(e.handler == 'remove' && typeof drawnItem != 'undefined' && drawnItem !== null){
                if(window.console) window.console.log('Drawing deleted...');
                if(typeof drawnItem != 'undefined' && drawnItem !== null){
                    drawnItems.removeLayer(drawnItem);
                }
                $('.leaflet-draw.leaflet-control .leaflet-draw-actions').hide();
                $('.leaflet-popup-pane .leaflet-draw-tooltip').remove();
            }
        });

推荐答案

通过自定义控件解决了我自己的问题（感谢stackexchange - https://gis.stackexchange.com/questions/60576/custom-leaflet-controls）：

Solved my own problem with a custom control (thanks to stackexchange - https://gis.stackexchange.com/questions/60576/custom-leaflet-controls):

更新！添加了@SpiderWan建议（谢谢！）所以不需要自定义CSS。此外，事件先前已附加到整个控制栏。而只是附加到controlUI按钮本身。

UPDATED! added @SpiderWan suggestions (thanks!) so no need for custom CSS. Also, the event was previously attached to the entire control bar. Instead attached to just the controlUI button itself.

Javascript：

Javascript:

L.Control.RemoveAll = L.Control.extend({
        options: {
            position: 'topleft',
        },

        onAdd: function (map) {
            var controlDiv = L.DomUtil.create('div', 'leaflet-control leaflet-bar');
            var controlUI = L.DomUtil.create('a', 'leaflet-draw-edit-remove', controlDiv);
            controlUI.title = 'Remove all drawn items';
            controlUI.setAttribute('href', '#');

            L.DomEvent
                .addListener(controlUI, 'click', L.DomEvent.stopPropagation)
                .addListener(controlUI, 'click', L.DomEvent.preventDefault)
                .addListener(controlUI, 'click', function () {
                    drawnItems.clearLayers();
                    if(window.console) window.console.log('Drawings deleted...');
                });
            return controlDiv;
        }
    });

removeAllControl = new L.Control.RemoveAll();
map.addControl(removeAllControl);

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