java qr code generator maven List item mouse event handlers in Java

Drawing QR Code in Java List item mouse event handlers

Listing 10.38 List item mouse event handlers
QR Code Generator In Java
Using Barcode maker for Java Control to generate, create Quick Response Code image in Java applications.
www.OnBarcode.com
Recognize QR In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
mouseoverHandler: function(e) { var src = e.srcElement e.srcElement : e.target; var index = parseInt(src.id.substring(src.id.lastIndexOf('_')+1)); this.updateSelection(index); }, itemClickHandler: function(e) { this.mouseoverHandler(e); this.hideSuggestions(); this.textInput.focus(); },
Barcode Generator In Java
Using Barcode encoder for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
ECC200 Printer In Java
Using Barcode creation for Java Control to generate, create ECC200 image in Java applications.
www.OnBarcode.com
mouseoverHandler() simply finds the target of the event and parses out the ID
PDF417 Encoder In Java
Using Barcode creator for Java Control to generate, create PDF-417 2d barcode image in Java applications.
www.OnBarcode.com
Generate EAN-13 In Java
Using Barcode encoder for Java Control to generate, create EAN 13 image in Java applications.
www.OnBarcode.com
that we generated on it to get an index representing which suggestion it is. It can then use the updateSelection() method we wrote on day 4 to update the selection to the suggestion over which the mouse is currently hovering. Similarly, itemClickHandler() has to update the selection, so it just calls mouseoverHandler() to do the selection update work. It then has to do the additional
USS-128 Encoder In Java
Using Barcode printer for Java Control to generate, create UCC.EAN - 128 image in Java applications.
www.OnBarcode.com
Generate ISBN In Java
Using Barcode encoder for Java Control to generate, create Bookland EAN image in Java applications.
www.OnBarcode.com
Refactoring
QR Code JIS X 0510 Maker In Java
Using Barcode creation for Java Control to generate, create QR image in Java applications.
www.OnBarcode.com
QR Code ISO/IEC18004 Creation In VB.NET
Using Barcode encoder for .NET framework Control to generate, create QR Code JIS X 0510 image in Visual Studio .NET applications.
www.OnBarcode.com
behavior of hiding the suggestions pop-up via a call to the hideSuggestions() method and giving the focus back to the text field so the user can continue typing. We ve finally completed the pop-up creation task. Now let s concentrate on the infinitely simpler task of hiding and showing it. Showing and hiding the pop-up Now that we ve developed code to handle all of the complex details of creating a pop-up list of suggestions, we need to write the code that shows and hides it. Fortunately, this is an extremely straightforward process, as any seasoned developer of DHTML like yourself knows. The showing and hiding of an element are typically done by manipulating the display property of an element s style. This component will be no different. So without further ado, listing 10.39 contains the code that shows the pop up and the code that hides the pop-up.
Encoding QR Code In Java
Using Barcode printer for BIRT reports Control to generate, create QR Code image in BIRT applications.
www.OnBarcode.com
Barcode Scanner In VB.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Listing 10.39 Showing and hiding the suggestions pop-up
EAN13 Creator In Visual Studio .NET
Using Barcode creator for .NET framework Control to generate, create GTIN - 13 image in .NET framework applications.
www.OnBarcode.com
Decode UPC Code In .NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
showSuggestions: function() { var divStyle = this.suggestionsDiv.style; if ( divStyle.display == '' ) return; Position the pop-up this.positionSuggestionsDiv(); Show the pop-up divStyle.display = ''; }, hideSuggestions: function() { this.suggestionsDiv.style.display = Hide the pop-up 'none'; },
Encoding Matrix Barcode In Visual C#
Using Barcode creator for VS .NET Control to generate, create 2D Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Make EAN13 In None
Using Barcode generator for Online Control to generate, create UPC - 13 image in Online applications.
www.OnBarcode.com
The show and hide, as shown here, simply manipulate the style.display property of suggestionsDiv in order to show it (via an empty string value) and hide it (via none). The showSuggestions() method does the additional work of positioning the pop-up before showing it. That s it! We mean that s really it. Our component is done. Let s take a few seconds to debrief.
Barcode Recognizer In Visual Basic .NET
Using Barcode Control SDK for .NET framework Control to generate, create, read, scan barcode image in Visual Studio .NET applications.
www.OnBarcode.com
PDF417 Creator In None
Using Barcode generation for Online Control to generate, create PDF417 image in Online applications.
www.OnBarcode.com
10.5.6 Refactor debriefing
Printing GTIN - 12 In Java
Using Barcode generator for Android Control to generate, create UPC Code image in Android applications.
www.OnBarcode.com
Printing Barcode In None
Using Barcode printer for Online Control to generate, create Barcode image in Online applications.
www.OnBarcode.com
This was certainly a fairly complex component with a lot of moving parts. Grand architects or not, we ve developed a reusable component to be proud of. Our TextSuggest component handles a wide range of configuration parameters, it s extensible, it s server-agnostic, it s unobtrusive, it s cross-browser, it has a simple API for creation, it slices, it dices Well, maybe it s not all that, but seriously, it s
Type-ahead suggest
pretty cool, and it covers all the bases that we listed in table 10.2. The component source code is available in its entirety at http://www.manning.com/crane. Rico can be found at http://openrico.org/ and Prototype at http://prototype. conio.net/.
10.6 Summary
The type-ahead suggest lets your users save time by offering the options that they may need as they are typing. When they type a few keystrokes on the keyboard, the data that they want is available for selection. This chapter has looked at the downfalls of the currently available implementations and has initiated an application that lets us eliminate any unnecessary postbacks to the server by doing most of the processing on the client. We have worked with DHTML to create a dynamic user interface that allows interaction with the keyboard and the mouse. This example shows how Ajax can be used effectively to add a seamless interaction with the server without disrupting the user s interactions with the web page. This script also degrades well with browsers that do not support Ajax, since the type-ahead textbox acts like a plain textbox into which users can enter data rather than just having a quick solution at their fingertips. Finally, we pushed the envelope of object-oriented JavaScript component development by refactoring the script into an easily created, configured, and used TextSuggest component.
Copyright © OnBarcode.com . All rights reserved.