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snap to 15 degrees angles in Leaflet.draw while ctrl key is pressed

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Laura Klünder 2017-11-15 23:47:24 +01:00
parent 05bda1ad0e
commit 3617c29b63
1 changed files with 18 additions and 1 deletions
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19
src/c3nav/editor/static/editor/js/editor.js
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@ -288,6 +288,7 @@ editor = {
_graph_edges_from: {},
_graph_edges_to: {},
_arrow_colors: [],
_last_vertex: null,
init_geometries: function () {
// init geometries and edit listeners
editor._highlight_layer = L.layerGroup().addTo(editor.map);
@ -302,15 +303,31 @@ editor = {
editor.map.on('editable:vertex:click', function () {
editor.map.doubleClickZoom.disable();
});
editor.map.on('editable:drawing:start editable:drawing:end', function() {
editor._last_vertex = null;
});
editor.map.on('editable:vertex:new', function(e) {
editor._last_vertex = e.vertex;
});
editor.map.on('editable:vertex:drag', function (e) {
e.vertex.setLatLng([Math.round(e.latlng.lat*100)/100, Math.round(e.latlng.lng*100)/100]);
});
editor.map.on('editable:drawing:click', function (e) {
editor.map.on('editable:drawing:click editable:drawing:move', function (e) {
if (e.originalEvent.ctrlKey && editor._last_vertex) {
var dx = e.latlng.lng - editor._last_vertex.latlng.lng,
dy = e.latlng.lat - editor._last_vertex.latlng.lat,
angle = Math.atan2(dy, dx) * (180 / Math.PI),
distance = Math.hypot(dx, dy),
newangle = Math.round(angle/15)*15 / (180 / Math.PI);
e.latlng.lat = editor._last_vertex.latlng.lat + Math.sin(newangle)*distance;
e.latlng.lng = editor._last_vertex.latlng.lng + Math.cos(newangle)*distance;
}
e.latlng.lat = Math.round(e.latlng.lat*100)/100;
e.latlng.lng = Math.round(e.latlng.lng*100)/100;
});
editor.map.on('editable:vertex:ctrlclick editable:vertex:metakeyclick', function (e) {
e.vertex.continue();
editor._last_vertex = e.vertex;
});
editor.map.on('zoomend', editor._adjust_line_zoom);