Another Wizard Example (with PDF)

DataPoint.java

public class DataPoint {

    public Boolean isPrint {get; set;}
    public Boolean isEmail {get; set;}
    public Contact contactData {get; set;}
    
    public DataPoint(Contact c) {
            contactData = c;
    }
}

StepOne.jsp

<apex:page controller="WizardExample" >
 
<apex:form >
<apex:commandButton action="{!previewPDF}" value="Preview PDF"  />
    <input type="checkbox" onclick="checkAll(this,'Selectd_Print')" />Print All /
    <input type="checkbox" onclick="checkAll(this,'Selectd_Email')" />Email All
    
<script type="text/javascript">
      function checkAll(cb,filter)
        {
            var inputElem = document.getElementsByTagName("input");          
            for(var i=0; i<inputElem.length; i++)
            {   
                if(inputElem[i].id.indexOf(filter)!=-1)                         
                inputElem[i].checked = cb.checked;
            }
        }
</script>
<apex:dataTable value="{!points}" var="point">
    <apex:column ><apex:facet name="header">Name</apex:facet><apex:outputField value="{!point.contactData.Name}" /></apex:column>
    <apex:column ><apex:facet name="header">Print</apex:facet><apex:inputCheckbox id="Selectd_Print" value="{!point.isPrint}"/></apex:column>
    <apex:column ><apex:facet name="header">Email</apex:facet><apex:inputCheckbox id="Selectd_Email" value="{!point.isEmail}"/></apex:column>
</apex:dataTable>
</apex:form>
            
    
</apex:page>

StepTwo.jsp

<apex:page controller="WizardExample" renderAs="{!contentType}" showHeader="false" >
    <apex:form rendered="{!contentType != 'PDF'}">
        <apex:commandButton action="{!showPDF}" value="Generate PDF" />
    </apex:form>
    <h1>My Contacts</h1> 
    <apex:repeat value="{!contactsToPrint}" var="contact">
        <apex:outputText value="{!contact.Name}" /><HR />
    </apex:repeat>
</apex:page>

WizardExample.java

public class WizardExample {

    public transient List<Contact> contacts {get; set;}
    public List<DataPoint> points {get; set;}
    
    public List<Contact> contactsToPrint {get; set;}
    public List<Contact> contactsToEmail {get; set;}
    
    public String contentType {get; set;}
    
    public WizardExample() {
        contentType = 'html';
        contacts = [SELECT ID, Name from Contact LIMIT 100];
        points = new List<DataPoint>();
        for(Contact c : contacts) {
            points.add(new DataPoint(c));
        }    
    }
    
    public PageReference previewPDF() {
        contactsToPrint = new List<Contact>();
        contactsToEmail = new List<Contact>();
        for(DataPoint point : points) {
            if(point.isPrint) { 
                contactsToPrint.add(point.contactData); 
            }
            if(point.isEmail) { 
                contactsToEmail.add(point.contactData); 
            }
        }
        points.clear();
        return Page.StepTwo;
    }
    
    public PageReference showPDF() {
        contentType = 'PDF';
        return Page.StepTwo;
    }
    
}