When finishing drawing, this PR dispatches the `drawend` event before adding
the feature to the source or collection.
This change allows user code to finish configuring the feature (setting style,
properties, ...).
It is useful since inserting a feature, or later on modifying it, may trigger
processing which only makes sense if the feature is ready. For example,
ol3-cesium will recreate a 3D counterpart.
Geometry index won't be updated correctly if feature geometry is changed using `feature.setGeometry(new_geometry)`
ol.interaction.Snap should listen for a 'change:geometry' event on ol.Feature
More than one features can be be changed while handlingDownUpSequence
exampe: ol.interaction.Modify supports simultaneous editing of multiple features
When a geometry changes old indexed segments are searched by the feature extend and removed. New ones are added.
Old feature extent sholud be used when removing the old indexed segments.
This commit changes ol.Snap -> ol.interaction.Snap, which extends
ol.interaction.Pointer. The 'pointerdown', 'pointermove' and
'pointerup' map browser events are hanlded to edit the pixel and
coordinate properties to make them 'snap' to the closest feature.
handlePointerMove_ doesn't need to be called when dragging.
handleDragEvent_ takes care of the event in that case.
in handleDragEvent_, createOrUpdateVertexFeature_ doesn't need to be called for each dragged segment. it can be called only once with current vertex.
fixes made to pass the build
Prevent vertexFeature_ from ol.interaction.Modify from being selected by ol.interaction.Select.
The bug occurs when an delete attempt fails. ex: clicikng on the first or last node of LineString,
or clicking a line segment between two nodes.
This commit fixes the bug that occurs when trying to modify
a closed LineString by clicking on the starting/ending node.
Such a closed line is added to the modify-test example.
Fix a bug in ol.interaction.Modify when trying to delete nodes
on a geometry that has duplicate nodes. A bug occurs when
clicking on the duplicate node.
