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Improve layer preview handling

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This commit is contained in:
Norbert Renner 2019-03-15 14:46:15 +01:00
parent c2369acde0
commit 9c3682294e
1 changed files with 82 additions and 17 deletions
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101
js/control/LayersTab.js
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@ -1,5 +1,6 @@
BR.LayersTab = L.Control.Layers.extend({
previewLayer: null,
saveLayers: [],
addTo: function (map) {
this._map = map;
@ -78,11 +79,23 @@ BR.LayersTab = L.Control.Layers.extend({
}
};
var treeData = this.toJsTree(structure);
var oldSelected = null;
var onSelectNode = function (e, data) {
var layerData = layerIndex[data.node.id];
var selected = data.selected[0];
this.showLayer(this.createLayer(layerData));
if (selected !== oldSelected) {
this.showPreview(this.createLayer(layerData));
oldSelected = selected;
} else {
data.instance.deselect_node(data.node);
}
};
var onDeselectNode = function (e, data) {
this.hidePreview();
oldSelected = null;
};
var onCheckNode = function (e, data) {
@ -104,8 +117,8 @@ BR.LayersTab = L.Control.Layers.extend({
if (this._map.hasLayer(obj.layer)) {
this._map.removeLayer(obj.layer);
if (!obj.overlay && this._layers.length > 0) {
this._map.addLayer(this._layers[0].layer);
if (!obj.overlay) {
this.addFirstLayer();
}
}
this.removeLayer(obj.layer);
@ -114,6 +127,7 @@ BR.LayersTab = L.Control.Layers.extend({
L.DomUtil.get('layers-control-wrapper').appendChild(this._form);
$('#optional-layers-tree')
.on('select_node.jstree', L.bind(onSelectNode, this))
.on('deselect_node.jstree', L.bind(onDeselectNode, this))
.on('check_node.jstree', L.bind(onCheckNode, this))
.on('uncheck_node.jstree', L.bind(onUncheckNode, this))
.on('ready.jstree', function (e, data) {
@ -232,6 +246,12 @@ BR.LayersTab = L.Control.Layers.extend({
return name;
},
addFirstLayer() {
if (this._layers.length > 0) {
this._map.addLayer(this._layers[0].layer);
}
},
_getLayerObjByName: function (name) {
for (var i = 0; i < this._layers.length; i++) {
if (this._layers[i] && this._layers[i].name === name) {
@ -310,29 +330,74 @@ BR.LayersTab = L.Control.Layers.extend({
return layer
},
removeSelectedBaseLayer: function () {
for (i = 0; i < this._layers.length; i++) {
obj = this._layers[i];
if (!obj.overlay && this._map.hasLayer(obj.layer)) {
removeSelectedLayers: function () {
for (var i = 0; i < this._layers.length; i++) {
var obj = this._layers[i];
if (this._map.hasLayer(obj.layer)) {
this._map.removeLayer(obj.layer);
this.saveLayers.push(obj);
}
}
},
showLayer: function (layer) {
this._map.addLayer(layer);
if (this.previewLayer && this._map.hasLayer(this.previewLayer)) {
this._map.removeLayer(this.previewLayer);
} else {
this.removeSelectedBaseLayer();
this._map.once('baselayerchange', function () {
if (this.previewLayer && this._map.hasLayer(this.previewLayer)) {
this._map.removeLayer(this.previewLayer);
restoreSelectedLayers: function (overlaysOnly) {
for (var i = 0; i < this.saveLayers.length; i++) {
var obj = this.saveLayers[i];
if (!overlaysOnly || (overlaysOnly && obj.overlay)) {
var hasLayer = !!this._getLayer(L.Util.stamp(obj.layer));
if (hasLayer) {
if (!this._map.hasLayer(obj.layer)) {
this._map.addLayer(obj.layer);
}
this.jstree.deselect_all();
}, this);
} else if (!obj.overlay) {
// saved base layer has been removed during preview, select first
this.addFirstLayer();
}
}
}
this.saveLayers = [];
},
removePreviewLayer: function () {
if (this.previewLayer && this._map.hasLayer(this.previewLayer)) {
this._map.removeLayer(this.previewLayer);
this.previewLayer = null;
return true;
}
return false;
},
deselectNode: function () {
var selected = this.jstree.get_selected();
if (selected.length > 0) {
this.jstree.deselect_node(selected[0]);
}
},
onBaselayerchange: function () {
// execute after current input click handler,
// otherwise added overlay checkbox state doesn't update
setTimeout(L.Util.bind(function () {
this.removePreviewLayer();
this.restoreSelectedLayers(true);
this.deselectNode();
}, this), 0);
},
showPreview: function (layer) {
this._map.addLayer(layer);
if (!this.removePreviewLayer()) {
this.removeSelectedLayers();
this._map.once('baselayerchange', this.onBaselayerchange, this);
}
this.previewLayer = layer;
},
hidePreview: function (layer) {
this._map.off('baselayerchange', this.onBaselayerchange, this);
this.removePreviewLayer();
this.restoreSelectedLayers();
}
});