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editor: snap to 15° when dragging vertices

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Laura Klünder 2017-11-18 17:25:22 +01:00
parent abae816992
commit 8b301d1048
1 changed files with 16 additions and 0 deletions
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16
src/c3nav/editor/static/editor/js/editor.js
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@ -299,6 +299,7 @@ editor = {
_graph_edges_to: {},
_arrow_colors: [],
_last_vertex: null,
_orig_vertex_pos: null,
init_geometries: function () {
// init geometries and edit listeners
editor._highlight_layer = L.layerGroup().addTo(editor.map);
@ -319,7 +320,22 @@ editor = {
editor.map.on('editable:vertex:new', function(e) {
editor._last_vertex = e.vertex;
});
editor.map.on('editable:vertex:dragstart', function (e) {
editor._orig_vertex_pos = [e.vertex.latlng.lat, e.vertex.latlng.lng];
});
editor.map.on('editable:vertex:dragend', function (e) {
editor._orig_vertex_pos = null;
});
editor.map.on('editable:vertex:drag', function (e) {
if (e.originalEvent.ctrlKey && editor._orig_vertex_pos) {
var dx = e.latlng.lng - editor._orig_vertex_pos[1],
dy = e.latlng.lat - editor._orig_vertex_pos[0],
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._orig_vertex_pos[0] + Math.sin(newangle)*distance;
e.latlng.lng = editor._orig_vertex_pos[1] + Math.cos(newangle)*distance;
}
e.vertex.setLatLng([Math.round(e.latlng.lat*100)/100, Math.round(e.latlng.lng*100)/100]);
});
editor.map.on('editable:drawing:click editable:drawing:move', function (e) {