asp.net core barcode scanner

asp.net core barcode scanner

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Here s the function: function resetFields(whichform) { if (Modernizr.input.placeholder) return; for (var i=0; i<whichform.elements.length; i++) { var element = whichform.elements[i]; if (element.type == "submit") continue; var check = element.placeholder || element.getAttribute('placeholder'); if (!check) continue; element.onfocus = function() { var text = this.placeholder || this.getAttribute('placeholder'); if (this.value == text) { this.className = ''; this.value = ""; } } element.onblur = function() { if (this.value == "") { this.className = 'placeholder'; this.value = this.placeholder || this.getAttribute('placeholder'); } } element.onblur(); } } The function is using two event handlers. The onfocus event is triggered when the user tabs to or clicks an element. The onblur event is triggered when the user moves out of the form element. For good measure, onblur is called immediately after it is created to apply the placeholder value if necessary.

Listing 2-3. A Media Capture Screen Class package com.apress.king.mediagrabber; import java.io.*; import import import import javax.microedition.io.Connector; javax.microedition.io.file.FileConnection; javax.microedition.media.*; javax.microedition.media.control.*

This is also known as Sherpa on some phones. Geodelic finds nearby restaurants, cafes, attractions, and so on. You can browse by category of food or distance.

import net.rim.device.api.ui.Field; import net.rim.device.api.ui.MenuItem; import net.rim.device.api.ui.component.*; import net.rim.device.api.ui.container.MainScreen; public class RecordingScreen extends MainScreen implements PlayerListener { public static final int RECORD_AUDIO = 1; public static final int RECORD_PICTURE = 2; public static final int RECORD_VIDEO = 3;

Note You need to use both the HTML-DOM placeholder attribute and the DOM getAttribute('placeholder') method due to the different implementations of unknown attributes across different browsers.

We ll use a simple state machine to keep track of the current operation and guide recording progress. The other instance variables will handle the actual media operations and the visual interface.

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This is Google s official app for Google Translate. Not only does it translate text to and from over 50 languages, it also has an audio pronunciation guide.

public static final int STATE_WAITING = 1; public static final int STATE_READY = 2; public static final int STATE_RECORDING = 3; private volatile int state = STATE_WAITING; private int type; private String location; private private private private Player player; RecordControl recorder; VideoControl video; Field cameraView;

Add the resetFields function to your global.js file. You need to activate the function by passing it a Form object. Write another function called prepareForms that loops through each Form object in the document and passes each one to the resetFields function. function prepareForms() { for (var i=0; i<document.forms.length; i++) { var thisform = document.forms[i]; resetFields(thisform); } } } Call the prepareForms function using addLoadEvent:

private LabelField status; private ByteArrayOutputStream dataOut;

Summary

Each MenuItem will display in the BlackBerry menu. To keep these class definitions compact, they call helper methods to perform their actual tasks.

// create the definition description var ddesc = document.createElement("dd"); var ddesc_text = document.createTextNode(definition); ddesc.appendChild(ddesc_text); // add them to the definition list dlist.appendChild(dtitle); dlist.appendChild(ddesc); } if (dlist.childNodes.length < 1) return false; Again, this runs counter to the principles of structured programming because there is now an additional exit point in the middle of the function. But this is probably the simplest way of dealing with Internet Explorer s quirk without altering the existing function significantly. The finished function looks like this: function displayAbbreviations() { if (!document.getElementsByTagName || !document.createElement || !document.createTextNode) return false; // get all the abbreviations var abbreviations = document.getElementsByTagName("abbr"); if (abbreviations.length < 1) return false; var defs = new Array(); // loop through the abbreviations for (var i=0; i<abbreviations.length; i++) { var current_abbr = abbreviations[i]; if (current_abbr.childNodes.length < 1) continue; var definition = current_abbr.getAttribute("title"); var key = current_abbr.lastChild.nodeValue; defs[key] = definition; } // create the definition list var dlist = document.createElement("dl"); // loop through the definitions for (key in defs) { var definition = defs[key]; // create the definition title var dtitle = document.createElement("dt"); var dtitle_text = document.createTextNode(key); dtitle.appendChild(dtitle_text); // create the definition description var ddesc = document.createElement("dd"); var ddesc_text = document.createTextNode(definition); ddesc.appendChild(ddesc_text); // add them to the definition list dlist.appendChild(dtitle); dlist.appendChild(ddesc); } if (dlist.childNodes.length < 1) return false; // create a headline var header = document.createElement("h2"); var header_text = document.createTextNode("Abbreviations"); header.appendChild(header_text); // add the headline to the body document.body.appendChild(header);

private MenuItem goItem = new MenuItem("Go", 0, 0) { public void run() { go(); } }; private MenuItem stopItem = new MenuItem("Stop", 0, 0) { public void run() { stop(); } }; private MenuItem doneItem = new MenuItem("Return", 0, 0) { public void run() { close(); } }; public RecordingScreen(int type, String location) { this.type = type; this.location = location; status = new LabelField("Waiting"); add(status); dataOut = new ByteArrayOutputStream(); initMedia(); }

Android offers a surprising amount of very useful apps for general business use, and the amount of offerings is growing at a phenomenal pace. There s a fantastic selection to make travel, task management, communication, and presentation easier. In the next chapter, we ll look at some more specialized apps for professionals.

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