私は、「Tres Finocchiaro」が提案したアイデアに従い、以下に基づいてアプリケーションを作成しました。
- ASP.NET 4.0
- IIS
- Chrome、IExplorer、Firefox
- ゼブラ TLP 2844
- EPLプロトコル
残念ながら、現在のブラウザのセキュリティの問題により、 jzebraが正しく機能するにはいくつかの改善が必要です。
jzebra のインストール
jzebdra をダウンロードし、dist ディレクトリからディレクトリにコピーします (例mydir: ):
- ウェブ
- mydir
- js
- ライブラリ
- qz-print.jar
- qz-print_jnlp.jnlp
print.html を作成します
<html>
<script type="text/javascript" src="js/deployJava.js"></script>
<script type="text/javascript">
/**
* Optionally used to deploy multiple versions of the applet for mixed
* environments. Oracle uses document.write(), which puts the applet at the
* top of the page, bumping all HTML content down.
*/
deployQZ();
/** NEW FUNCTION **/
function initPrinter() {
findPrinters();
useDefaultPrinter();
}
/** NEW FUNCTION **/
function myalert(txt) {
alert(txt);
}
/**
* Deploys different versions of the applet depending on Java version.
* Useful for removing warning dialogs for Java 6. This function is optional
* however, if used, should replace the <applet> method. Needed to address
* MANIFEST.MF TrustedLibrary=true discrepency between JRE6 and JRE7.
*/
function deployQZ() {
var attributes = {id: "qz", code:'qz.PrintApplet.class',
archive:'qz-print.jar', width:1, height:1};
var parameters = {jnlp_href: 'qz-print_jnlp.jnlp',
cache_option:'plugin', disable_logging:'false',
initial_focus:'false'};
if (deployJava.versionCheck("1.7+") == true) {}
else if (deployJava.versionCheck("1.6+") == true) {
delete parameters['jnlp_href'];
}
deployJava.runApplet(attributes, parameters, '1.5');
}
/**
* Automatically gets called when applet has loaded.
*/
function qzReady() {
// Setup our global qz object
window["qz"] = document.getElementById('qz');
var title = document.getElementById("title");
if (qz) {
try {
title.innerHTML = title.innerHTML + " " + qz.getVersion();
document.getElementById("content").style.background = "#F0F0F0";
} catch(err) { // LiveConnect error, display a detailed meesage
document.getElementById("content").style.background = "#F5A9A9";
alert("ERROR: \nThe applet did not load correctly. Communication to the " +
"applet has failed, likely caused by Java Security Settings. \n\n" +
"CAUSE: \nJava 7 update 25 and higher block LiveConnect calls " +
"once Oracle has marked that version as outdated, which " +
"is likely the cause. \n\nSOLUTION: \n 1. Update Java to the latest " +
"Java version \n (or)\n 2. Lower the security " +
"settings from the Java Control Panel.");
}
}
}
/**
* Returns whether or not the applet is not ready to print.
* Displays an alert if not ready.
*/
function notReady() {
// If applet is not loaded, display an error
if (!isLoaded()) {
return true;
}
// If a printer hasn't been selected, display a message.
else if (!qz.getPrinter()) {
/** CALL TO NEW FUNCTION **/
initPrinter();
return false;
}
return false;
}
/**
* Returns is the applet is not loaded properly
*/
function isLoaded() {
if (!qz) {
alert('Error:\n\n\tPrint plugin is NOT loaded!');
return false;
} else {
try {
if (!qz.isActive()) {
alert('Error:\n\n\tPrint plugin is loaded but NOT active!');
return false;
}
} catch (err) {
alert('Error:\n\n\tPrint plugin is NOT loaded properly!');
return false;
}
}
return true;
}
/**
* Automatically gets called when "qz.print()" is finished.
*/
function qzDonePrinting() {
// Alert error, if any
if (qz.getException()) {
alert('Error printing:\n\n\t' + qz.getException().getLocalizedMessage());
qz.clearException();
return;
}
// Alert success message
alert('Successfully sent print data to "' + qz.getPrinter() + '" queue.');
}
/***************************************************************************
* Prototype function for finding the "default printer" on the system
* Usage:
* qz.findPrinter();
* window['qzDoneFinding'] = function() { alert(qz.getPrinter()); };
***************************************************************************/
function useDefaultPrinter() {
if (isLoaded()) {
// Searches for default printer
qz.findPrinter();
// Automatically gets called when "qz.findPrinter()" is finished.
window['qzDoneFinding'] = function() {
// Alert the printer name to user
var printer = qz.getPrinter();
myalert(printer !== null ? 'Default printer found: "' + printer + '"':
'Default printer ' + 'not found');
// Remove reference to this function
window['qzDoneFinding'] = null;
};
}
}
/***************************************************************************
* Prototype function for finding the closest match to a printer name.
* Usage:
* qz.findPrinter('zebra');
* window['qzDoneFinding'] = function() { alert(qz.getPrinter()); };
***************************************************************************/
function findPrinter(name) {
// Get printer name from input box
var p = document.getElementById('printer');
if (name) {
p.value = name;
}
if (isLoaded()) {
// Searches for locally installed printer with specified name
qz.findPrinter(p.value);
// Automatically gets called when "qz.findPrinter()" is finished.
window['qzDoneFinding'] = function() {
var p = document.getElementById('printer');
var printer = qz.getPrinter();
// Alert the printer name to user
alert(printer !== null ? 'Printer found: "' + printer +
'" after searching for "' + p.value + '"' : 'Printer "' +
p.value + '" not found.');
// Remove reference to this function
window['qzDoneFinding'] = null;
};
}
}
/***************************************************************************
* Prototype function for listing all printers attached to the system
* Usage:
* qz.findPrinter('\\{dummy_text\\}');
* window['qzDoneFinding'] = function() { alert(qz.getPrinters()); };
***************************************************************************/
function findPrinters() {
if (isLoaded()) {
// Searches for a locally installed printer with a bogus name
qz.findPrinter('\\{bogus_printer\\}');
// Automatically gets called when "qz.findPrinter()" is finished.
window['qzDoneFinding'] = function() {
// Get the CSV listing of attached printers
var printers = qz.getPrinters().split(',');
for (i in printers) {
myalert(printers[i] ? printers[i] : 'Unknown');
}
// Remove reference to this function
window['qzDoneFinding'] = null;
};
}
}
/***************************************************************************
* Prototype function for printing raw EPL commands
* Usage:
* qz.append('\nN\nA50,50,0,5,1,1,N,"Hello World!"\n');
* qz.print();
***************************************************************************/
function print() {
if (notReady()) { return; }
// Send characters/raw commands to qz using "append"
// This example is for EPL. Please adapt to your printer language
// Hint: Carriage Return = \r, New Line = \n, Escape Double Quotes= \"
qz.append('\nN\n');
qz.append('q609\n');
qz.append('Q203,26\n');
qz.append('B5,26,0,1A,3,7,152,B,"1234"\n');
qz.append('A310,26,0,3,1,1,N,"SKU 00000 MFG 0000"\n');
qz.append('A310,56,0,3,1,1,N,"QZ PRINT APPLET"\n');
qz.append('A310,86,0,3,1,1,N,"TEST PRINT SUCCESSFUL"\n');
qz.append('A310,116,0,3,1,1,N,"FROM SAMPLE.HTML"\n');
qz.append('A310,146,0,3,1,1,N,"QZINDUSTRIES.COM"');
// Append the rest of our commands
qz.append('\nP1,1\n');
// Tell the applet to print.
qz.print();
}
/***************************************************************************
* Prototype function for logging a PostScript printer's capabilites to the
* java console to expose potentially new applet features/enhancements.
* Warning, this has been known to trigger some PC firewalls
* when it scans ports for certain printer capabilities.
* Usage: (identical to appendImage(), but uses html2canvas for png rendering)
* qz.setLogPostScriptFeatures(true);
* qz.appendHTML("<h1>Hello world!</h1>");
* qz.printPS();
***************************************************************************/
function logFeatures() {
if (isLoaded()) {
var logging = qz.getLogPostScriptFeatures();
qz.setLogPostScriptFeatures(!logging);
alert('Logging of PostScript printer capabilities to console set to "' + !logging + '"');
}
}
/***************************************************************************
****************************************************************************
* * HELPER FUNCTIONS **
****************************************************************************
***************************************************************************/
function getPath() {
var path = window.location.href;
return path.substring(0, path.lastIndexOf("/")) + "/";
}
/**
* Fixes some html formatting for printing. Only use on text, not on tags!
* Very important!
* 1. HTML ignores white spaces, this fixes that
* 2. The right quotation mark breaks PostScript print formatting
* 3. The hyphen/dash autoflows and breaks formatting
*/
function fixHTML(html) {
return html.replace(/ /g, " ").replace(/’/g, "'").replace(/-/g,"‑");
}
/**
* Equivelant of VisualBasic CHR() function
*/
function chr(i) {
return String.fromCharCode(i);
}
/***************************************************************************
* Prototype function for allowing the applet to run multiple instances.
* IE and Firefox may benefit from this setting if using heavy AJAX to
* rewrite the page. Use with care;
* Usage:
* qz.allowMultipleInstances(true);
***************************************************************************/
function allowMultiple() {
if (isLoaded()) {
var multiple = qz.getAllowMultipleInstances();
qz.allowMultipleInstances(!multiple);
alert('Allowing of multiple applet instances set to "' + !multiple + '"');
}
}
</script>
<input type="button" onClick="print()" />
</body>
</html>
提供されるコードは、「jzebra_installation/dist/sample.html」に基づいています。