问题描述
我需要沿着X，Y轴在传单地图上使用标尺，但是传单API不支持它，并且没有可用的插件.有一个jquery统治者可以满足我的需求.是否可以在传单地图上添加jquery标尺?
I need a ruler on leaflet map along X,Y axis but leaflet API does not support it and there is no plugin available. There is a jquery ruler that servers my needs. Is it possible to add jquery ruler on leaflet map ?
这里是示例: http://ruler.hilliuse.com/
标尺也必须调整为单张地图的缩放级别.请提出建议.
The ruler must adjust to the zoom level of leaflet map also. Please suggest.
推荐答案
还没有深入研究两者的代码，但这是需要权衡的:
Haven't taken a deep look into the code of either, but here's the trade off:
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传单的比例控制已被关联到传单缩放事件.应该可以复制x轴并将其作为y轴旋转90º.但是，请记住，小叶比例控制是用来测量球面(即地球)而不是xy平面上的距离的.
leaflet's scale-control will already be hooked up to leaflet zoom events. Should be possible to duplicate the x-axis and rotate it 90º as a y-axis. However, keep in mind that leaflet scale-control is meant to measure distance on a spherical surface (i.e. the earth), not a flat xy plane.
jquery统治者插件应该更容易破解，在内部，b/c不应用于测量球面距离.不过，您必须在缩放时更新其值.查看传单 zoomend 事件.像这样使用它:
the jquery ruler plugin should be easier to hack, internally, b/c it is not supposed to measure spherical distance. You'll have to update it's values on zoom, though. Check out the leaflet zoomend event. Use it like this:
map.on('zoomend', function(event){ updateRuler(...);});
map.on('zoomend', function(event){ updateRuler(...);});
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