Cyfeirnod Grid:<\/b> " + gridref + "
"
+ "Radiws Chwiliad: " + document.getElementById(circleRadiusDDLName).value + "m";
buttonHTML = "" +
"Defnyddiwch y manylion hyn i" +
"
";
}
else {
popupHTML = "Cyfeirnod Grid:<\/b> " + gridref;
}
else {
if (drawCircle) {
popupHTML = "Grid Reference:<\/b> " + gridref + "
"
+ "Search Radius: " + document.getElementById(circleRadiusDDLName).value + "m";
buttonHTML = "" +
"Use these details to" +
"
";
}
else {
popupHTML = "Grid Reference:<\/b> " + gridref;
}
}
}
var btnHTML = ""
//if (buttonHTML) btnHTML = buttonHTML;
if (infoHTML)
map.openInfoWindowHtml(point, popupHTML + btnHTML, { width: 140, autoScroll: true });
else
map.openInfoWindowHtml(point, popupHTML + btnHTML, { maxWidth: 90, maxHeight:80, autoScroll: true });
}
function usePointFromPostcode(enteredPostcode, drawCentralGridSquare, gridRefAtClickBoxName, getBoundaryInfo)
{ localSearch = new GlocalSearch()
localSearch.setSearchCompleteCallback(null, function() {
if (localSearch.results[0]) {
var gridref;
var resultLat = localSearch.results[0].lat;
var resultLng = localSearch.results[0].lng;
if (drawCentralGridSquare) {
var wgs84 = new GT_WGS84(); //Create Lat/Long Object
wgs84.setDegrees(resultLat, resultLng);
var osgb = wgs84.getOSGB(); //Convert Lat/Long to Easting/Northing
gridref = osgb.getGridRef(3); //Get a grid reference with 5 digits
if (gridref.indexOf("SV00") == -1 && gridref.indexOf("undefined") == -1) {
if(document.getElementById(gridRefAtClickBoxName)) document.getElementById(gridRefAtClickBoxName).value = gridref;
var gridSquare = plotOSGridSquare(gridref, "#5E0");
map.addOverlay(gridSquare);
var bnds = gridSquare.getBounds();
popupInfo(bnds.getCenter(), gridref, null, null);
if (getBoundaryInfo) getLocationInfo(gridref, document.getElementById(circleRadiusDDLName).value);
}
}
var point = new GLatLng(resultLat, resultLng);
if (drawCentralGridSquare)
if (drawCircle)
map.setCenter(point, calculateZoom());
else
map.setCenter(point, 16);
else
map.setCenter(point, 17);
map.setMapType(G_HYBRID_MAP);
}
else {
alert("Postcode '" + enteredPostcode + "' not found");
}
});
localSearch.execute(enteredPostcode + ", UK");
}
// Draw a circle around centre point
function plotCircle(centre, radius)
{ var poly = [];
var numPoints = 80; //Number of points in polyline
var lat = centre.lat();
var lng = centre.lng();
var d2r = Math.PI / 180; // degrees to radians
var r2d = 180 / Math.PI; // radians to degrees
var Clat = (radius / 6378100) * r2d; // using 6378100m as earth's radius
var Clng = Clat / Math.cos(lat * d2r);
//Add each point in the circle
for (var i = 0; i < numPoints; i++)
{ var theta = Math.PI * (i / (numPoints / 2));
Cx = lng + (Clng * Math.cos(theta));
Cy = lat + (Clat * Math.sin(theta));
poly.push(new GLatLng(Cy, Cx));
}
//Add the first point to complete the circle
poly.push(poly[0]);
//Create a line with the points from poly, red, 3 pixels wide, 80% opaque
var line = new GPolyline(poly, '#FF0000', 3, 0.8);
return line;
}
function insertGridReference(insertIntoBoxName, selectedGridReference, grTypeDDLName, grTypeSpanName)
{ document.getElementById(insertIntoBoxName).value = selectedGridReference;
var grTypeDDL = document.getElementById(grTypeDDLName);
var grTypeSpan = document.getElementById(grTypeSpanName);
if(grTypeDDL)
{ var grType = grTypeDDL[grTypeDDL.selectedIndex].value;
if (grType == "")
grTypeDDL.value = "2";
grTypeSpan.innerHTML = grTypeDDL[grTypeDDL.selectedIndex].text;
}
$find("MapPopupMPE").hide();
}
function IsNumeric(sText)
{ var ValidChars = "0123456789.";
var IsNumber = true;
var Char;
for (i = 0; i < sText.length && IsNumber == true; i++)
{ Char = sText.charAt(i);
if (ValidChars.indexOf(Char) == -1)
{ IsNumber = false;
}
}
return IsNumber;
}
function validateGridReference(gridRef)
{ if (gridRef.length == 0)
{ return true;
}
else if (gridRef.length < 4 || gridRef.length % 2 != 0)
{ if (document.getElementById("ctl00_BodyPlaceHolder_LanguageHF").value == "1")
{ alert("Mae'r hyd y Cyfeiriad Grid yn Annilys");
return false;
}
else
{ alert("Invalid Grid Reference Length");
return false;
}
}
else if (!IsGridLetter(gridRef.substring(0,2)))
{ if (document.getElementById("ctl00_BodyPlaceHolder_LanguageHF").value == "1")
{ alert("Llythyrau Grid Annilys");
return false;
}
else
{ alert("Invalid Grid Letters");
return false;
}
}
else if (!IsNumeric(gridRef.substring(2)))
{ if (document.getElementById("ctl00_BodyPlaceHolder_LanguageHF").value == "1")
{ alert("Rhifau Grid Annilys");
return false;
}
else
{ alert("Invalid Grid Numbers");
return false;
}
}
else
{ return true;
}
}
function IsGridLetter(sText)
{ var ValidChars = "ABCDEFGHJKLMNOPQRSTUVWXYZabcdefghjklmnopqrstuvwxyz";
var IsText = true;
var Char;
for (i = 0; i < sText.length && IsGridLetter == true; i++)
{ Char = sText.charAt(i);
if (ValidChars.indexOf(Char) == -1)
{ IsText = false;
}
}
return IsGridLetter;
}
function plotOSGridSquare(gridRef, colour)
{ //Create new OSGB object
var grBL = new GT_OSGB();
//Convert Grid Reference to Easting/Northing
grBL.parseGridRef(gridRef);
//Convert Easting/Northing to Lat/Long
var llBL = grBL.getWGS84();
//Get Length
var grLength = gridRef.length - 2;
var isTetrad = false;
if(grLength == 3) isTetrad = true;
//Top Left Point
var grTL = new GT_OSGB();
grTL.parseGridRef(grBL.getGridSquarePoint(isTetrad, grLength / 2, "topleft"));
var llTL = grTL.getWGS84();
//Bottom Right Point
var grBR = new GT_OSGB();
grBR.parseGridRef(grBL.getGridSquarePoint(isTetrad, grLength / 2, "bottomright"));
var llBR = grBR.getWGS84();
//Top Right Point
var grTR = new GT_OSGB();
grTR.parseGridRef(grBL.getGridSquarePoint(isTetrad, grLength / 2, "topright"));
var llTR = grTR.getWGS84();
var points = new Array();
points[0] = new GLatLng(llTR.latitude, llTR.longitude);
points[1] = new GLatLng(llBR.latitude, llBR.longitude);
points[2] = new GLatLng(llBL.latitude, llBL.longitude);
points[3] = new GLatLng(llTL.latitude, llTL.longitude);
points[4] = new GLatLng(llTR.latitude, llTR.longitude);
var osGridSquare = new GPolyline(points, colour, 4, 0.6);
var returnPolygon;
if (drawCircle)
{ var bnds = osGridSquare.getBounds();
returnPolygon = plotCircle(bnds.getCenter(), document.getElementById(circleRadiusDDLName).value);
}
else
returnPolygon = osGridSquare;
return returnPolygon;
}
function right(str, count)
{ return str.substring(str.length - count);
}
function calculateZoom(grLength)
{
if (drawCircle) {
switch (parseInt(document.getElementById(circleRadiusDDLName).value)) {
case 250:
return 16;
break;
case 500:
return 15;
break;
case 1000: case 1500:
return 14;
break;
case 2000: case 2500: case 3000:
return 13;
break;
case 4000: case 5000:
return 12;
break;
}
}
else
{ switch(grLength)
{ case 0:
return 7;
break;
case 2:
return 11;
break;
case 3:
return 13;
break;
case 4:
return 14;
break;
case 6:
return 17;
break;
case 8:
return 18;
break;
case 10:
return 19;
break;
}
}
}
