Question

我有一个功能，允许用户在OpenLayers地图上绘制正方形或矩形。我想更改光标的样式。默认情况下，光标为蓝色圆圈。我想将其更改为正方形，以便符号系统与用户可能创建的形状匹配。

解决方案涉及添加样式属性。我需要有关如何为非图像游标实现样式属性的细节，该游标类似于默认的蓝色圆圈，而是一个正方形。谢谢！

<section>
    Inside of main app component
</section>
<pm-first-child></pm-first-child>
<pm-second-child>

</pm-second-child>

<pm-first-content></pm-first-content>
<pm-second-content></pm-second-content>

<pm-content-projector>  <!--- view child of app component -->
        <section>
            Inside app projector elememt yayyy
        </section>
        <pm-projector-child>  --> content child of ContentProjectorComponent
        </pm-projector-child>
</pm-content-projector>

Answer 1

这是一个可行的解决方案，它将默认的蓝色圆圈光标更改为正方形，并允许用户在地图上创建正方形或矩形。

  $scope.drawBoundingBox = () => {
    const bbVector = new ol.source.Vector({ wrapX: false });
    const vector = new ol.layer.Vector({
      source: bbVector
    });
    bbVector.on("addfeature", evt => {
      $scope.coords = evt.feature.getGeometry().getCoordinates();
    });

    const geometryFunction = ol.interaction.Draw.createRegularPolygon(4);

    draw = new ol.interaction.Draw({
      source: bbVector,
      type: "Circle",
      geometryFunction: geometryFunction,
      style: new ol.style.Style({
        stroke: new ol.style.Stroke({
          color: "#FFF",
          width: 3
        }),
        fill: new ol.style.Fill({
          color: [255, 255, 255, 0]
        }),
        geometryFunction,
        image: new ol.style.RegularShape({
          fill: new ol.style.Fill({
            color: '#FFF'
          }),
          stroke: new ol.style.Stroke({
            color: "blue",
            width: 3
          }),
          points: 4,
          radius: 10,
          angle: Math.PI / 4
        }),
      }),
    });
    vector.set("name", "boundingBox");
    map.addLayer(vector);
    map.addInteraction(draw);
  };

绘制形状时样式OpenLayers 3光标

1 个答案: