clientprintfunctions.js

arcgis engine地图打印任务的应用


// Client-side printing javascript functions
var printWin = null;

// Called when another task executes--updates list of tasks
function RefreshTaskResults(callbackFunctionString) {
    // Must include a delay, otherwise causes repeated client callback loop
    var sendString = "sendRefreshTaskResults(\"" + callbackFunctionString + "\")";
    window.setTimeout(sendString, 200);
}

function sendRefreshTaskResults(callbackFunctionString){
    var argument='EventArg=updateTaskResults';
    var context=null;
    eval(callbackFunctionString);
}

function PrintTaskSendRequest(button, callbackFunctionString, mapId) {
    doHourglass();
    var pre = getControlPrefix(button.id);
    
    // get task results items checked
    var cblPrefix = pre + "_cblResults";
    var cbResult = null;
    var printItems = "";
    var listDone = false;
    var i = 0;
    
    while (!listDone) {
        cbResult = document.getElementById(cblPrefix + "_" + i.toString());
        if (cbResult != null) {
            if (cbResult.checked) {
                // add to list of checked results items
                if (printItems.length > 0) printItems += ",";
                printItems += i.toString();
            }
            i++;
        }
        else {
            listDone = true;
        }
    }
    
    // get map print options from form
    var printTitle = "";
    var printBox = document.getElementById(pre + "_ptitle");
    if (printBox != null) {
        // replace "&"
        printTitle = printBox.value;
        printTitle = printTitle.replace(/&/, "##amp##");
        printTitle = printTitle;
        //printTitle = escape(printTitle);
        //printTitle = encode64(printTitle);
    }
    
    var printMap = document.getElementById(pre + "_printMap").checked;
    if (!printMap)
        mapId = "";
    var widthList = document.getElementById(pre + "_width");
    var resolutionList = document.getElementById(pre + "_resolution");
    var printWidth = widthList.options[widthList.selectedIndex].value;
    var printResolution = resolutionList.options[resolutionList.selectedIndex].value;
    var scale = escape(document.getElementById(pre + "_scale").value);
    
    var argument = "mapId="+mapId + "&title="+printTitle;  //EventArg=getPrintPage&
    argument += "&printResults="+printItems;
    argument += "&width="+printWidth + "&resolution="+printResolution + "&scale="+scale;
    //alert(argument);
    var context=null;
    executeTask(argument, callbackFunctionString);
    //eval(callbackFunctionString);
   
    // hide print dialog
    //window.setTimeout("hideFloatingPanel('"+pre+"')", 1000);
}

// Called from server-generated function after print request
function PrintTaskDisplayPage(printContent) {   //printImageUrl, mapHeight, taskResultsHtml) {

    var windowOptions = "toolbar=yes,width=700,height=600,top=100,left=200,scrollbars=yes,resizable=yes";
    if (!printWin || printWin.closed) {
        printWin = window.open("", "printWindow", windowOptions);
    }
    
    if (printWin != null) {
    
        // restore line breaks (encoded as xxrnxx at server)
        var regexp = /xxrnxx/gi;
        printContent = printContent.replace(regexp, "\n");
        
        // "unescape" the content
        printContent = decode(printContent);
        
        printWin.document.write(printContent);

        printWin.document.close();
        printWin.focus();
    }
    else
        alert("Cannot display print preview window. Check that popup blockers are disabled for this site.");
        
    undoHourglass();
    
}

function getControlPrefix (fullControlId) {
    var lastUnderscore = fullControlId.lastIndexOf("_");
    return fullControlId.substring(0, lastUnderscore);
}

function doHourglass() {
    document.body.style.cursor = 'wait';
}
function undoHourglass() {
    document.body.style.cursor = 'auto';
}

var conversionMap = {
    "amp" : "&",
    "lt" : "<",
    "gt" : ">",
    "apos" : "'",
    "quot" : '"'
}

function decode(entityString) {
    return entityString.replace(/&(\w+);/g, function(m,g) {
        return conversionMap[g]||m;
    });
}

function encode64(input) {
    input = escape(input);
    var output = "";
    var chr1, chr2, chr3 = "";
    var enc1, enc2, enc3, enc4 = "";
    var i = 0;

    do {
        chr1 = input.charCodeAt(i++);
        chr2 = input.charCodeAt(i++);
        chr3 = input.charCodeAt(i++);

        enc1 = chr1 >> 2;
        enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
        enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
        enc4 = chr3 & 63;

     if (isNaN(chr2)) {
        enc3 = enc4 = 64;
     } else if (isNaN(chr3)) {
        enc4 = 64;
     }

     output = output + 
        keyStr.charAt(enc1) + 
        keyStr.charAt(enc2) + 
        keyStr.charAt(enc3) + 
        keyStr.charAt(enc4);
     chr1 = chr2 = chr3 = "";
     enc1 = enc2 = enc3 = enc4 = "";
    } while (i < input.length);

    return output;
}