如何修改leafpm包添加到Leaflet地图对象的默认蓝色为红色？

要把leafpm新增图形的默认颜色从蓝色改成红色，关键是在pmDrawOptions中配置pathOptions参数——这个参数控制绘制完成后最终图形的样式，你之前设置的templineStyle只是绘制过程中的临时辅助线条样式。

修改后的代码如下：

pacman::p_load(dplyr, leafpm, leaflet)
leaflet() %>%
  addTiles() %>%
  addPmToolbar(
    toolbarOptions = pmToolbarOptions(
      drawMarker = FALSE, drawPolygon = F, drawRectangle = F, drawCircle = F, 
      position = "topright", editMode = TRUE, cutPolygon = F, removalMode = T
    ),
    drawOptions = pmDrawOptions(
      snappable = T, allowSelfIntersection = T, finishOn = "dblclick",
      templineStyle = list(color = "red"),
      # 新增配置：设置最终图形的默认样式
      pathOptions = list(color = "red", weight = 2)
    ),
    editOptions = pmEditOptions(preventMarkerRemoval = F, draggable = FALSE),
    cutOptions = pmCutOptions(snappable = FALSE, allowSelfIntersection = FALSE)
  )

补充说明： #

• pathOptions里的color指定图形边框颜色，weight可调整线条粗细（可选）
• 如果需要修改多边形的填充颜色，可在pathOptions中添加fillColor = "red"、fillOpacity = 0.3这类参数
• 该设置对所有通过leafpm工具栏新增的图形生效，无需额外指定targetLayerId或targetGroup

内容的提问来源于stack exchange，提问作者Beni