barcode visual basic NOTE The example shown can be implemented so that its behavior is more user-friendly by using in Java

Make QR-Code in Java NOTE The example shown can be implemented so that its behavior is more user-friendly by using

NOTE The example shown can be implemented so that its behavior is more user-friendly by using
QR Code Creation In Java
Using Barcode printer for Java Control to generate, create Denso QR Bar Code image in Java applications.
Decode QR Code ISO/IEC18004 In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
Ajax This will prevent the entire page from having to be resubmitted to the client just to see the values of the dependent fields being auto-filled Techniques for implementing Ajax applications are covered in 12
Bar Code Printer In Java
Using Barcode creation for Java Control to generate, create barcode image in Java applications.
Barcode Reader In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
Extending the Value Change Example
QR Code Creation In C#.NET
Using Barcode encoder for .NET framework Control to generate, create Quick Response Code image in .NET applications.
Denso QR Bar Code Generator In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
The preceding example illustrated a common user interface behavior in which values of one or more input fields are updated as a result of information provided by another input field Another very common user interface behavior is to simply change a user interface element property, such as to readonly or disabled In Faces, this behavior is even easier to implement than the preceding example but is achieved in largely the same manner Consider the following enhancement to the Zip code example To enable the user to enter additional information into the form, another input field called More Info is added However, this input field will not display initially Instead, a checkbox labeled Add more info will be included When the user clicks the box, it renders the More Info input field (using a new text area) to receive more information To implement this new functionality onto the same form in the preceding example, you first add the following UI components to the page in between the last field and the submit button:
QR Code Maker In .NET Framework
Using Barcode generation for VS .NET Control to generate, create QR Code image in VS .NET applications.
Printing QR Code 2d Barcode In Visual Basic .NET
Using Barcode generator for .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications.
<h:outputLabel value="Add more Info"/> <h:selectBooleanCheckbox /> <h:outputLabel value="More Info" rendered="#{zipAutoFillinfoRendered}"/> <h:inputTextarea />
Bar Code Maker In Java
Using Barcode encoder for Java Control to generate, create barcode image in Java applications.
Data Matrix ECC200 Printer In Java
Using Barcode creator for Java Control to generate, create ECC200 image in Java applications.
NOTE In a production application, the for attribute of h:outputLabel should be set to the id of the
Make UPC-A Supplement 2 In Java
Using Barcode creation for Java Control to generate, create GTIN - 12 image in Java applications.
Generating UPC Code In Java
Using Barcode creator for Java Control to generate, create UPC-A Supplement 5 image in Java applications.
associated input component for accessibility Because the new UI component tags are added to the Facelet page, you must also add declarations for the new components in the zipAutoFill backing bean
Paint USPS POSTNET Barcode In Java
Using Barcode generation for Java Control to generate, create USPS POSTNET Barcode image in Java applications.
Make UPCA In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create GTIN - 12 image in Visual Studio .NET applications.
private HtmlInputTextarea moreInfo; private HtmlSelectBooleanCheckbox moreInfoCheckbox;
USS Code 128 Creation In Java
Using Barcode printer for Android Control to generate, create Code 128A image in Android applications.
UPC-A Recognizer In Visual Basic .NET
Using Barcode reader for .NET Control to read, scan read, scan image in VS .NET applications.
Part I:
Barcode Creation In Java
Using Barcode encoder for Android Control to generate, create bar code image in Android applications.
Create Bar Code In Java
Using Barcode maker for Android Control to generate, create bar code image in Android applications.
The JavaServer Faces Framework
UPC Symbol Creation In None
Using Barcode encoder for Font Control to generate, create UPCA image in Font applications.
GS1 - 12 Generator In Objective-C
Using Barcode printer for iPad Control to generate, create UPC Symbol image in iPad applications.
To keep track of the render state of the More Info field, add a boolean variable called infoRendered and set it initially to false:
boolean infoRendered = false;
In addition to the declarations, you must also add the associated JavaBean getter and setter accessors for each new bean property in order to be able to access/update the properties in the application In order to toggle the infoRendered boolean variable when the checkbox is clicked, a value change listener method is added to the backing bean Similar to before, once the value change event is processed, the Render Response phase must be initiated, by calling renderResponse( ), in order to avoid validations
public void toggleMoreInfo(ValueChangeEvent vce) { setInfoRendered((Boolean) vcegetNewValue()); }
In the Facelet page, the new UI component tags are bound to the declarations in the backing bean The <h:selectBooleanCheckbox> tag will have the following modifications:
<h:selectBooleanCheckbox binding="#{zipAutoFillmoreInfoCheckbox}" immediate="true" onchange="documentgetElementById('autofill')click();" valueChangeListener="#{zipAutoFilltoggleMoreInfo}"/>
Explanations of the attribute settings follow: binding UI component binding to declared instance of HtmlSelectBooleanCheckbox in backing bean immediate Immediacy setting, which avoids validation processing valueChangeListener Bound to value change listener method that toggles the infoRendered boolean variable to render the More Info field in backing bean onchange JavaScript method to auto-submit the form when the checkbox is clicked The More Info output label and text area components must now be modified to render conditionally based on the value of the infoRendered boolean variable, as shown next:
<h:outputLabel value="More Info" rendered="#{zipAutoFillinfoRendered}"/> <h:inputTextarea id="moreinfo" binding="#{zipAutoFillmoreInfo}" rendered="#{zipAutoFillinfoRendered}"/>
The resultant view is shown in Figure 9-8 This example has shown how through proper usage of value change events in Faces, one can implement a very useful user interface behavior
9:
The JSF Event Model
FIGURE 9-8 Toggling the More Info text box with a checkbox
PARTIII PART PART
Working with Phase Events and Listeners
Recall that in addition to application events, the other category of event in Faces is the lifecycle event Within this category are two kinds of events: phase events and system events Phase events are events that are processed in between each phase of the Faces request processing lifecycle Since they have the ability to execute in between the different phases, phase events and their respective phase listeners provide a unique way to jump into the execution of the lifecycle and check or alter values/properties of any object in a Faces application System events will be discussed in the section following this one
Copyright © OnBarcode.com . All rights reserved.