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var map = new OpenLayers.Map({
div: "map",
layers: [
new OpenLayers.Layer.WMS(
"Global Imagery",
"http://maps.opengeo.org/geowebcache/service/wms",
{layers: "bluemarble"},
{tileOrigin: new OpenLayers.LonLat(-180, -90)}
),
new OpenLayers.Layer.Vector()
],
center: new OpenLayers.LonLat(0, 0),
zoom: 1
});
var draw = new OpenLayers.Control.DrawFeature(
map.layers[1], OpenLayers.Handler.Path
);
map.addControl(draw);
draw.activate();
// handle clicks on method links
document.getElementById("insertXY").onclick = function() {
var values = parseInput(
window.prompt(
"Enter map coordinates for new point (e.g. '-111, 46')", "x, y"
)
);
if (values != null) {
draw.insertXY(values[0], values[1]);
}
};
document.getElementById("insertDeltaXY").onclick = function() {
var values = parseInput(
window.prompt(
"Enter offset values for new point (e.g. '15, -10')", "dx, dy"
)
);
if (values != null) {
draw.insertDeltaXY(values[0], values[1]);
}
};
document.getElementById("insertDirectionLength").onclick = function() {
var values = parseInput(
window.prompt(
"Enter direction and length offset values for new point (e.g. '-45, 10')", "direction, length"
)
);
if (values != null) {
draw.insertDirectionLength(values[0], values[1]);
}
};
document.getElementById("insertDeflectionLength").onclick = function() {
var values = parseInput(
window.prompt(
"Enter deflection and length offset values for new point (e.g. '15, 20')", "deflection, length"
)
);
if (values != null) {
draw.insertDeflectionLength(values[0], values[1]);
}
};
document.getElementById("cancel").onclick = function() {
draw.cancel();
};
document.getElementById("finishSketch").onclick = function() {
draw.finishSketch();
};
function parseInput(text) {
var values = text.split(",");
if (values.length !== 2) {
values = null;
} else {
values[0] = parseFloat(values[0]);
values[1] = parseFloat(values[1]);
if (isNaN(values[0]) || isNaN(values[1])) {
window.alert("The two values must be numeric.");
values = null;
}
}
return values;
}
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