ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Add support for extending linear coordinates when drawing Polygons

Browse Source
This commit is contained in:
Otto Pellinen
2019-09-13 11:40:15 +03:00
committed by Olivier Guyot
parent 35569a8427
commit 12ce4cc82a
1 changed files with 33 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
src/ol/interaction/Draw.js
View File

@@ -904,21 +904,45 @@ class Draw extends PointerInteraction {
/** /**
* Extend an existing geometry by adding additional points. This only works * Extend an existing geometry by adding additional points. This only works
* on features with `LineString` geometries, where the interaction will * when drawing LineStrings or Polygons. Extending supports only input
* features with `LineString` geometries, where the interaction will
* extend lines by adding points to the end of the coordinates array. * extend lines by adding points to the end of the coordinates array.
* @param {!Feature<LineString>} feature Feature to be extended. * @param {!Feature<LineString>} feature Feature to be extended.
* @api * @api
*/ */
extend(feature) { extend(feature) {
const geometry = feature.getGeometry(); const lineStringGeometry = feature.getGeometry();;
const lineString = geometry; const extendCoordinates = lineStringGeometry.getCoordinates();
this.sketchFeature_ = feature; const ending = extendCoordinates[extendCoordinates.length-1].slice();
this.sketchCoords_ = lineString.getCoordinates(); const mode = this.mode_;
const last = this.sketchCoords_[this.sketchCoords_.length - 1];
this.finishCoordinate_ = last.slice(); let coordinates = [];
this.sketchCoords_.push(last.slice()); if (mode === Mode.LINE_STRING) {
coordinates = this.sketchCoords_;
} else if (mode === Mode.POLYGON) {
coordinates = (this.sketchCoords_)[0];
} else {
return;
}
// (1) Remove last coordinate, (2) extend coordinate list and (3) clone last coordinate
coordinates.pop();
Array.prototype.push.apply(coordinates, extendCoordinates);
coordinates.push(ending)
// Update geometry and sketch line
this.geometryFunction_(this.sketchCoords_, this.sketchFeature_.getGeometry());
if (mode === Mode.POLYGON) {
this.sketchLineCoords_ = this.sketchCoords_[0];
if (this.sketchLine_ !== null) {
this.sketchLine_.getGeometry().setCoordinates(this.sketchLineCoords_);
} else {
this.sketchLine_ = new Feature(
new LineString(this.sketchLineCoords_));
}
}
this.updateSketchFeatures_(); this.updateSketchFeatures_();
this.dispatchEvent(new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_));
} }
/** /**