Part IV ColdFusion MX Components, Web Services, and Flash Integration in Java

Generation QR in Java Part IV ColdFusion MX Components, Web Services, and Flash Integration
Part IV ColdFusion MX Components, Web Services, and Flash Integration
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The form-field values are populated via getter functions declared in the Employee component. If you re creating a new employee, the properties contain only empty and zeroed values and, therefore, so do the form fields. If you re editing an existing employee, the properties and form fields contain data retrieved from the database. The cf_NavButtons custom tag contains both Previous and Next Submit buttons and a Cancel button. We discuss them in detail later in the section Building the Controller layer. Page one of your wizard is shown in Figure 23-7.
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Figure 23-7: Page 1 of your wizard. Now you create a template named Page2.cfm and enter the code from Listing 23-10.
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Listing 23-10: Page2.cfm
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<cfinvoke component= Company method= ListCompanies returnvariable= companyList > <cfscript> currentCompanyID = Session.employeeWizard.GetEmployeeCompanyID(); </cfscript> <html> <head> <title>Persistent Component Example</title> <LINK REL= StyleSheet HREF= styles.css type= text/css > </head> <body> <h1>Persistent Component-Based Wizard</h1> <h2>Employer</h2> <form action= Page2Ctrl.cfm method= post > <table cellspacing= 0 cellpadding= 0 border= 0 > <cfoutput> <tr> <th>SSN</th>
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23 Building Your First ColdFusion Components
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<td>#Session.employeeWizard.GetEmployeeSSN()#</td> </tr> <tr> <th>First Name</th> <td>#Session.employeeWizard.GetEmployeeFirstname()#</td> </tr> <tr> <th>Last Name</th> <td>#Session.employeeWizard.GetEmployeeLastname()#</td> </tr> </cfoutput> <tr> <th>Employer</th> <td> <select name= CompanyID size= 1 > <cfoutput query= companyList > <option value= #CompanyID# <cfif currentCompanyID EQ companyList.CompanyID>SELECTED</cfif>>#CompanyName#</option> </cfoutput> </select> </td> </tr> </table> <cf_NavButtons> </form> </body> </html>
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Page two repeats the component s property values as entered in page one, plus it enables the user to choose an employer for the current employee through a drop-down list that is dynamically populated from the ListCompanies method of the Company component. The current company ID is retrieved by using the getter function GetEmployeeCompanyID(), and it is used to test for which company should be preselected (if any) in the drop-down list, as shown in Figure 23-8.
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Figure 23-8: Page 2 of your wizard.
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Part IV ColdFusion MX Components, Web Services, and Flash Integration
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Create next a template named Page3.cfm containing the code from Listing 23-11.
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Listing 23-11: Page3.cfm
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<html> <head> <title>Persistent Component Example</title> <LINK REL= StyleSheet HREF= styles.css type= text/css > </head> <body> <h1>Persistent Component-Based Wizard</h1> <h2>Salary & Date of Birth</h2> <cfoutput> <form action= Page3Ctrl.cfm method= post > <table cellspacing= 0 cellpadding= 0 border= 0 > <tr> <th>SSN</th> <td>#Session.employeeWizard.GetEmployeeSSN()#</td> </tr> <tr> <th>First Name</th> <td>#Session.employeeWizard.GetEmployeeFirstname()#</td> </tr> <tr> <th>Last Name</th> <td>#Session.employeeWizard.GetEmployeeLastname()#</td> </tr> <tr> <th>Employer</th> <td>#Session.employeeWizard.GetEmployeeCompanyName()#</td> </tr> <tr> <th>Salary</th> <td><input type= text name= Salary value= #Session.employeeWizard.GetEmployeeSalary()# maxlength= 20 ></td> </tr> <tr> <th>Date of Birth</th> <td><input type= text name= DateOfBirth value= #Session.employeeWizard.GetEmployeeDateOfBirth()# maxlength= 30 ></td> </tr> </table> <cf_NavButtons>
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23 Building Your First ColdFusion Components
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</form> </cfoutput> </body> </html>
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Nothing special here just two more form fields to submit, as shown in Figure 23-9.
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Figure 23-9: Page 3 of your wizard. The final wizard page is mainly to verify what you have entered and to see the annual bonus that the employee earns before you commit the employee s properties to the database. Create a template named Page4.cfm containing the code from Listing 23-12.
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Listing 23-12: Page4.cfm
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<html> <head> <title>Persistent Component Example</title> <LINK REL= StyleSheet HREF= styles.css type= text/css > </head> <body> <h1>Persistent Component-Based Wizard</h1> <h2>Please Verify</h2> <cfoutput> <form action= Page4Ctrl.cfm method= post > <table cellspacing= 0 cellpadding= 0 border= 0 > <tr> <th>SSN</th> <td>#Session.employeeWizard.GetEmployeeSSN()#</td> </tr> <tr>
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Continued
Part IV ColdFusion MX Components, Web Services, and Flash Integration
Listing 23-12 (continued)
<th>First Name</th> <td>#Session.employeeWizard.GetEmployeeFirstname()#</td> </tr> <tr> <th>Last Name</th> <td>#Session.employeeWizard.GetEmployeeLastname()#</td> </tr> <tr> <th>Employer</th> <td>#Session.employeeWizard.GetEmployeeCompanyName()#</td> </tr> <tr> <th>Salary</th> <td>#DollarFormat(Session.employeeWizard.GetEmployeeSalary())#</td> </tr> <tr> <th><font color= ##008000 >Bonus</font></th> <td><font color= ##008000 >#DollarFormat(Session.employeeWizard.Bonus())#</font>< /td> </tr> <tr> <th>Date of Birth</th> <td>#DateFormat(Session.employeeWizard.GetEmployeeDateOfBirth(), mmmm d, yyyy )#</td> </tr> </table> <cf_NavButtons mode= Finish > </form> </cfoutput> </body> </html>
You may have just passed it up without a second thought, but look again at how simple it is to display the current employee s annual bonus, as shown in Figure 23-10. Just a simple method call without even needing to pass an argument identifying the employee! Two more View elements are in your application. EmployeeDeleted.cfm is a simple display page that appears after an Employee component instance is deleted, and WizardDeleted.cfm is a similar page that is displayed after the wizard itself is deleted. Their purpose is simply to inform the user that his actions were successful. As you can see, building wizard pages based on long-lived persistent components is rather easy after you get the pattern down.