aimsidentify.js

采用arcims结合asp开发的一个webgis系统,针对地下水,实现了曲线时时绘制的功能.

// aimsIdentify.js
/*
*  JavaScript template file for ArcIMS HTML Viewer
*		dependent on aimsXML.js, ArcIMSparam.js, aimsCommon.js, aimsMap.js, and aimsLayers.js
*		To be interactive, dependent also on aimsDHTML.js, aimsClick.js, and aimsNavigation.js
*/

aimsIdentifyPresent=true;

// hyperlink variables
var currentHyperLinkLayer="";
var currentHyperLinkField="";
var currentHyperLinkPrefix="";
var currentHyperLinkSuffix="";
var hyperlinkWindowWidth=500;
var hyperlinkWindowHeight=400;

// variable for search tolerance... dynamically set in app
var searchTolerance=1/100;
// starting record position for returned records
var queryStartRecord=1;

if (imsQueryURL=="") {
	imsQueryURL= imsURL + "&CustomService=Query";
	//alert(imsQueryURL);
}
var canQuery=true;
var newSelectCount=0;
var selectPoints = new Array();

// can features be selected if invisible or not within layer scale threshholds?
var canSelectInvisible=false;


/*
***************************************************************************************

Identify functions 

***************************************************************************************
*/

// identify feature
function identify(e) {
	if (checkIfActiveLayerAvailable()) {
		highlightedOne="";
		var theX = mouseX;
		var theY = mouseY;
		getMapXY(theX,theY);
		searchTolerance = (xDistance/iWidth) * pixelTolerance;
		var tempWest = mapX - searchTolerance;
		var tempNorth = mapY + searchTolerance;
		var tempEast = mapX + searchTolerance;
		var tempSouth = mapY - searchTolerance;
		queryStartRecord=1;
		selectEnvelope='maxy="' + forceComma(tempNorth) + '" maxx="' + forceComma(tempEast) + '" miny="' + forceComma(tempSouth) + '" minx="' + forceComma(tempWest) + '"';
		selectionMode=2;
		var theString = writeGetFeatures(tempWest,tempSouth,tempEast,tempNorth);
		//if (useTextFrame) parent.TextFrame.document.location = "text.htm";
		//alert(theString);
		showRetrieveData();
		sendToServer(imsQueryURL,theString,identifyXMLMode);
	}
}

// hyperlink from feature in active layer
function hyperLink(e) {
	if (checkIfActiveLayerAvailable()) {
		if (currentHyperLinkLayer!="") {
			highlightedOne="";
			var theX = mouseX;
			var theY = mouseY;
			getMapXY(theX,theY);
			searchTolerance = (xDistance/iWidth) * pixelTolerance;
			var tempWest = mapX - searchTolerance;
			var tempNorth = mapY + searchTolerance;
			var tempEast = mapX + searchTolerance;
			var tempSouth = mapY - searchTolerance;
			var tempSwap = swapSelectFields;
			swapSelectFields=false;
			var tempSelect = selectFields;
			selectFields = LayerIDField[ActiveLayerIndex] + " " + LayerShapeField[ActiveLayerIndex] + " " + currentHyperLinkField;
			var theString = writeGetFeatures(tempWest,tempSouth,tempEast,tempNorth);
			selectFields = tempSelect;
			swapSelectFields=tempSwap;
			showRetrieveData();
			//if (useTextFrame) parent.TextFrame.document.location = "text.htm";
			sendToServer(imsQueryURL,theString,hyperlinkXMLMode);
		} else {
			alert(msgList[47]);
		}
	}
}


// write out XML request to identify features
function writeGetFeatures(west1,south1,east1,north1) {
	if (swapSelectFields) {
		selectFields=selFieldList[ActiveLayerIndex];
	}
	var useString = writeIdentifyXML(ActiveLayer,ActiveLayerType,selectFields,west1,south1,east1,north1,maxFeaturesReturned,useLimitExtent);
	hightlightedOne="";
	return useString;
}

function writeIdentifyXML(theLayer,theLayerType,theFields,leftX,bottomY,rightX,topY,maxReturned,hasLimit) {
	var theString = '<ARCXML version="1.1">\n<REQUEST>\n<GET_FEATURES outputmode="xml" envelope="false" checkesc ="true" geometry="false" featurelimit="' + maxReturned + '">\n';
	theString += '<LAYER id="' + theLayer + '" />';
	theString += '<SPATIALQUERY subfields="' + theFields + '">';
	theString += '<SPATIALFILTER relation="area_intersection" >';
	theString += '<ENVELOPE maxy="' + forceComma(topY) + '" maxx="' + forceComma(rightX) + '" miny="' + forceComma(bottomY) + '" minx="' + forceComma(leftX) + '" />';
	theString += '</SPATIALFILTER>';
	theString += '</SPATIALQUERY>';
	if (hasLimit) {
		// keep this within the limitExtent
		theString += '<SPATIALFILTER relation="area_intersection">\n';
		theString += '<ENVELOPE maxx="' + forceComma(limitRight) + '" maxy="' + forceComma(limitTop) + '" minx="' + forceComma(limitLeft) + '" miny="' + forceComma(limitBottom) + '" />\n';
		theString += '</SPATIALFILTER>\n';
	}
	theString += '</GET_FEATURES>';
	theString += '</REQUEST>';
	theString += '</ARCXML>';
	return theString;

}

// parse XML response for selected features
function displayAttributeData(theReply) {
	setLayerFields(ActiveLayerIndex);
	var url = appDir + "displayAttributeData.htm";
	if (useTextFrame) {
		parent.TextFrame.document.location = url;
	} else {
		var Win1 = open(url,"DataWindow","width=575,height=250,scrollbars=yes,resizable=yes");
		extWin = Win1;
		focusOnData = true;
	}

}

function parseHyperLink(theReply) {
	//alert(theReply);
	var fList="";
	var lpos1 = 1;
	var lpos2 = 1;
	var pos = 0;
	var startpos = 0;
	var endpos = 0;
	var fString = theReply.substring(startpos,endpos);
	var featureCount = justGetFeatureCount(theReply);
	var linkString = "width=" + hyperlinkWindowWidth + ",height=" + hyperlinkWindowHeight + ",scrollbars=yes,resizable=yes"
	var selectedData="";
	var fCount = featureCount;
	//alert("displayAttributeData()[featurecount=" + featureCount + "]");
	selectCount = 0;
	var tempString="";
	if (featureCount > 0) {
		var searchStr = currentHyperLinkField + "=";
		
		newSelectCount += 1;

		endpos = 1;
		pos = theReply.indexOf(searchStr,1);
		startpos = pos + searchStr.length + 1;
		endpos =theReply.indexOf(dQuote,startpos);
		inData = theReply.substring(startpos,endpos);
		var theLinkURL = currentHyperLinkPrefix + inData + currentHyperLinkSuffix;
		if (parent.TextFrame!=null) {
			parent.TextFrame.document.open();
			parent.TextFrame.document.writeln('<html><meta http-equiv="Content-Type" content="text/html; charset=' + charSet + '"><head>');
			parent.TextFrame.document.writeln('	<title>' + titleList[9] + 's</title>');
			parent.TextFrame.document.writeln('</head>');
			parent.TextFrame.document.writeln('<body BGCOLOR="White" TEXT="Black" LEFTMARGIN=0 TOPMARGIN=0>');
			parent.TextFrame.document.writeln('<FONT FACE="Arial"><B>' + LayerName[ActiveLayerIndex] +'</B></font><FONT FACE="Arial" size="-2">');
			parent.TextFrame.document.writeln('<br>' + msgList[67] + theLinkURL );
			parent.TextFrame.document.writeln('</FONT>');
			parent.TextFrame.document.writeln('</body></html>');
			parent.TextFrame.document.close();
		}
		var Win1=open(theLinkURL,"",linkString);
	} else {
	
		//alert(tempString);
		if (parent.TextFrame!=null) {
			parent.TextFrame.document.open();
			parent.TextFrame.document.writeln('<html><meta http-equiv="Content-Type" content="text/html; charset=' + charSet + '"><head>');
			parent.TextFrame.document.writeln('	<title>' + titleList[9] + '</title>');
			parent.TextFrame.document.writeln('</head>');
			parent.TextFrame.document.writeln('<body BGCOLOR="White" TEXT="Black" LEFTMARGIN=0 TOPMARGIN=0>');
			parent.TextFrame.document.writeln('<FONT FACE="Arial"><B>' + LayerName[ActiveLayerIndex] +'</B></font><FONT FACE="Arial" size="-2">');
			parent.TextFrame.document.writeln('<br>' + msgList[68]);
			if (debugOn>0) {
				parent.TextFrame.document.writeln('<p>' + msgList[65] + '<br>');
				parent.TextFrame.document.writeln(untag(theReply));
			}
			parent.TextFrame.document.writeln('</FONT>');
			parent.TextFrame.document.writeln('</body></html>');
			parent.TextFrame.document.close();
		} else {
			var msg = msgList[69];
			if (debugOn>0) {
				msg = msg + msgList[9] + theReply;
			}
			alert(msg);
		}
	}
	hideRetrieveData();
}

// are there any selected features?
function checkSelected() {
	var isOk = false;
	if (selectCount>0) isOk = true;
	return isOk;
}

function checkHyperLinkLayer(layerIndex) {
	var canLink = false;
	//alert(hyperLinkLayers.length);
	for (var i=0; i<hyperLinkLayers.length; i++) {
			if (LayerName[layerIndex]==hyperLinkLayers[i]) {
				canLink=true;
				currentHyperLinkLayer=LayerName[layerIndex];
				currentHyperLinkField=hyperLinkFields[i];
				currentHyperLinkPrefix=hyperLinkPrefix[i];
				currentHyperLinkSuffix=hyperLinkSuffix[i];
			}
	}
	return canLink;

}

// check to see if active layer is in scale threshold and visible 
	// so it can be used for querying
function checkIfActiveLayerAvailable() {
	// is the override flag set?
	if (canSelectInvisible) {
		return true;
	} else {
		// is the current scale within the scale min and max?
		if ((mapScaleFactor>=LayerMinScale[ActiveLayerIndex]) && (mapScaleFactor<=LayerMaxScale[ActiveLayerIndex])) {
			// is the active layer visible?
			if (LayerVisible[ActiveLayerIndex]==1) {
				return true;
			
			} else {
				var msg = msgList[104] + LayerName[ActiveLayerIndex] + msgList[102] + LayerName[ActiveLayerIndex] + msgList[108];
				
				alert(msg);
				return false;
			}
		} else {
			var msg = msgList[104] + LayerName[ActiveLayerIndex] + msgList[101];
			//if ((!listAllLayers) && (hasTOC)) msg += msgList[103];
			alert(msg);
			return false;
		}