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Show layer bounds in preview (#146)

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This commit is contained in:
Norbert Renner 2019-04-26 15:19:04 +02:00
parent 4049d484dc
commit e049dbf42a
5 changed files with 1488 additions and 4 deletions
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32
js/control/LayersTab.js
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@ -1,5 +1,6 @@
BR.LayersTab = BR.ControlLayers.extend({
previewLayer: null,
previewBounds: null,
saveLayers: [],
initialize: function (layersConfig, baseLayers, overlays, options) {
@ -109,7 +110,7 @@ BR.LayersTab = BR.ControlLayers.extend({
var selected = data.selected[0];
if (selected !== oldSelected) {
this.showPreview(this.createLayer(layerData));
this.showPreview(layerData);
oldSelected = selected;
} else {
data.instance.deselect_node(data.node);
@ -385,6 +386,27 @@ BR.LayersTab = BR.ControlLayers.extend({
return false;
},
showPreviewBounds: function (layerData) {
if (layerData.geometry) {
this.previewBounds = L.geoJson(layerData.geometry, {
// fill/mask outside of bounds polygon with Leaflet.snogylop
invert: true,
// reduce unmasked areas appearing due to clipping while panning and zooming out
renderer: L.svg({ padding: 1 }),
color: '#333',
fillOpacity: 0.4,
weight: 2
}).addTo(this._map);
}
},
removePreviewBounds: function () {
if (this.previewBounds && this._map.hasLayer(this.previewBounds)) {
this._map.removeLayer(this.previewBounds);
this.previewBounds = null;
}
},
deselectNode: function () {
var selected = this.jstree.get_selected();
if (selected.length > 0) {
@ -396,23 +418,29 @@ BR.LayersTab = BR.ControlLayers.extend({
// execute after current input click handler,
// otherwise added overlay checkbox state doesn't update
setTimeout(L.Util.bind(function () {
this.removePreviewBounds();
this.removePreviewLayer();
this.restoreActiveLayers(true);
this.deselectNode();
}, this), 0);
},
showPreview: function (layer) {
showPreview: function (layerData) {
var layer = this.createLayer(layerData);
this._map.addLayer(layer);
this.removePreviewBounds();
if (!this.removePreviewLayer()) {
this.saveRemoveActiveLayers();
this._map.once('baselayerchange', this.onBaselayerchange, this);
}
this.previewLayer = layer;
this.showPreviewBounds(layerData);
},
hidePreview: function (layer) {
this._map.off('baselayerchange', this.onBaselayerchange, this);
this.removePreviewBounds();
this.removePreviewLayer();
this.restoreActiveLayers();
}