openlayers禁用鼠标滚轮放大、拖拽事件并设置为只有按住Ctrl键才可以执行放大拖拽操作

卷新心菜2024-06-29 17:35

禁用openlayers鼠标滚轮放大、拖拽移动地图设置这两行代码即可：

new Map({
      interactions: defaults({ dragPan: false, mouseWheelZoom: false }),
})

或者设置只允许按住Ctrl键才可以操作

import { DragPan, MouseWheelZoom, defaults } from "ol/interaction.js";
import { platformModifierKeyOnly } from "ol/events/condition.js";

const map = new Map({
      interactions: defaults({ dragPan: false, mouseWheelZoom: false }).extend([
        new DragPan({
          condition: function (event) {
            return (
              // 检查是否有两个触点，或者按下了ctrl键
              this.getPointerCount() === 2 || platformModifierKeyOnly(event)
            );
          },
        }),
        new MouseWheelZoom({
          condition: platformModifierKeyOnly,
        }),
      ]),
      layers: [
        new TileLayer({
          source: new OSM(),
        }),
      ],
      target: "map",
      view: new View({
        center: [0, 0],
        zoom: 2,
      }),
    });

new MouseWheelZoom({ condition: platformModifierKeyOnly }) 用于创建一个鼠标滚轮缩放交互
condition是一个配置项，用于指定触发缩放的条件。
platformModifierKeyOnly是一个条件函数，仅在按住平台修饰键（如 Ctrl 键）时返回 true。