[OpenLayers-Users] Problems with labels, renderIntents and some other sutff
Robert Sanson
Robert.Sanson at asurequality.com
Tue Dec 3 12:18:08 PST 2013
Hi David
To avoid labelling vertices of polygons when selected, use something
like the following - define your Styles, and then add a StyleMap with a
function that only labels the polygons:
var padd_style = new OpenLayers.Style();
padd_style.label = "${getLabelp}";
padd_style.pointRadius = 4;
padd_style.strokeColor = "#006666";
padd_style.strokeDashstyle = "solid";
padd_style.fillColor = "#EBFFD6";
padd_style.fillOpacity = 0.0;
padd_style.strokeWidth = 2;
padd_style.fontColor = "blue";
padd_style.fontSize =10;
padd_style.fontFamily = "Arial";
padd_style.fontWeight = "bold";
var delf_style = new OpenLayers.Style({
'strokeColor': '#666666',
'strokeOpacity': 0.3,
'fillColor': '#cccccc',
'fillOpacity': 0.1,
'fontColor': '#222222'
});
var padd_stylemap = new OpenLayers.StyleMap({
"default": new OpenLayers.Style(padd_style, {
context: {
getLabelp: function (feature) {
if (feature.geometry && feature.geometry.CLASS_NAME ==
"OpenLayers.Geometry.Polygon") {
return feature.attributes.name;
} else {
return "";
}
}
}
}),
"delf": delf_style
});
regards,
Robert
>>> "David Alda Fernandez de Lezea" <dalda at hazi.es> 3/12/2013 10:01
p.m. >>>
Hi list,
I'm facing a strange behaviour regarding labelling features, in this
case polygons, and the rendering intents of my style map. I have some
features loaded into an OpenLayers.Layer.Vector layer. This layer has a
style map definition:
var styles = new OpenLayers.StyleMap({
"default": new OpenLayers.Style(null,{
rules: [
new OpenLayers.Rule({
symbolizer: {
"Point": {
pointRadius: 5,
graphicName: "circle",
fillColor: "#FFA500",
fillOpacity: 0.25,
strokeWidth: 1,
strokeOpacity: 1,
strokeColor: "#FFA500"
},
"Line": {
strokeWidth: 3,
strokeOpacity: 1,
strokeColor: "#FFA500"
},
"Polygon": {
strokeWidth: 2,
strokeOpacity: 1,
strokeColor: "#FFA500",
fillColor: "#FFA500"
}
}
})
]
}),
"select": new OpenLayers.Style({
strokeColor: "#00ccff",
strokeWidth: 4,
strokeDashstyle: "solid"
}),
"temporary": new OpenLayers.Style(null, {
rules: [
new OpenLayers.Rule({
symbolizer: {
"Point": {
pointRadius: 5,
graphicName: "square",
fillColor: "white",
fillOpacity: 0.25,
strokeWidth: 1,
strokeOpacity: 1,
strokeColor: "#333333"
},
"Line": {
strokeWidth: 3,
strokeOpacity: 1,
strokeColor: "#00ccff"
},
"Polygon": {
strokeWidth: 2,
strokeOpacity: 1,
strokeColor: "#0000ff",
fillColor: "#0000ff"
}
}
})
]
})
});
I've developed a function to label the features dynamically:
labelFeatures: function (etiquetas){
//label : "name: ${name}\n\nage: ${age}",
var label="";
for (var i=0;i<=etiquetas.length-1;i++){
label += "${" + etiquetas[i] + "}-";
}
label = label.substring(0,label.length-1);
var pila = this.map.getLayersByName("pila")[0];
for (var i=0;i<=pila.styleMap.styles["default"].rules.length-1;i++){
if (pila.styleMap.styles["default"].rules[i].symbolizer.Polygon){
pila.styleMap.styles["default"].rules[i].symbolizer.Polygon.label =
label;
pila.styleMap.styles["default"].rules[i].symbolizer.Polygon.labelAlign =
"rt";
pila.styleMap.styles["default"].rules[i].symbolizer.Polygon.fontSize =
"14px";
pila.styleMap.styles["default"].rules[i].symbolizer.Polygon.fontWeight =
"bold";
}
if (pila.styleMap.styles["default"].rules[i].symbolizer.Line){
pila.styleMap.styles["default"].rules[i].symbolizer.Line.label =
label;
pila.styleMap.styles["default"].rules[i].symbolizer.Line.labelAlign
= "rt";
pila.styleMap.styles["default"].rules[i].symbolizer.Line.fontSize =
"14px";
pila.styleMap.styles["default"].rules[i].symbolizer.Line.fontWeight
= "bold";
}
if (pila.styleMap.styles["default"].rules[i].symbolizer.Point){
pila.styleMap.styles["default"].rules[i].symbolizer.Point.label =
label;
pila.styleMap.styles["default"].rules[i].symbolizer.Point.labelAlign =
"rt";
pila.styleMap.styles["default"].rules[i].symbolizer.Point.fontSize
= "14px";
pila.styleMap.styles["default"].rules[i].symbolizer.Point.fontWeight =
"bold";
}
pila.styleMap.styles["default"].defaultStyle.label = label;
}
}
I also have the highlight control added to the map.
Then thing is that once the features are loaded and rendered the label
appears correctly, buy whenever I hover the pointer over the feature the
correct label disappears and I get the substitution value for the label,
i.e, something like ${myLabel}. Furthermore, whenever I select the
feature I get an 'undefined' label over all the feature's vertices. And
finally another weird behaviour is that if I try to draw a new feature
with the DrawPolygon control I get the following error:
Uncaught TypeError: Cannot read property 'x' of null OpenLayers.js:614
OpenLayers.Renderer.SVG.OpenLayers.Class.drawText OpenLayers.js:614
OpenLayers.Renderer.OpenLayers.Class.drawFeature OpenLayers.js:292
OpenLayers.Layer.Vector.OpenLayers.Class.drawFeature
OpenLayers.js:1578
OpenLayers.Layer.Vector.OpenLayers.Class.addFeatures
OpenLayers.js:1565
OpenLayers.Handler.Polygon.OpenLayers.Class.createFeature
OpenLayers.js:1994
OpenLayers.Handler.Path.OpenLayers.Class.mousedown OpenLayers.js:1846
OpenLayers.Events.OpenLayers.Class.triggerEvent OpenLayers.js:559
OpenLayers.Events.OpenLayers.Class.handleBrowserEvent
OpenLayers.js:562
(anonymous function)
I'm working with OpenLayers 2.9
I don't really know what to do. Any help is much appreciated.
Thanks in advance.
Regards,
David Alda Fernández de Lezea
UNIDAD DE EMPRENDIMIENTO Y DESARROLLO RURAL
Area de Sistemas de Información Geográfica, Planificación Territorial y
Forestal
Granja Modelo s/n
01192 Arkaute Araba
T 627923170 F 945 003 290
dalda at hazi.es <blocked::mailto:correo_electronico at hazi.es> |
www.hazi.es <blocked::http://www.hazi.es/>
<blocked::http://www.hazi.es/>
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