Jeff Douglas – Technology, Coding and Bears… OH MY!

 
public with sharing class PagingController {
 
	List<categoryWrapper> categories {get;set;}
 
	// instantiate the StandardSetController from a query locator
	public ApexPages.StandardSetController con {
		get {
			if(con == null) {
				con = new ApexPages.StandardSetController(Database.getQueryLocator([Select Id, Name FROM Cat3__c Order By Name limit 100]));
				// sets the number of records in each page set
				con.setPageSize(5);
			}
			return con;
		}
		set;
	}
 
	// returns a list of wrapper objects for the sObjects in the current page set
	public List<categoryWrapper> getCategories() {
		categories = new List<categoryWrapper>();
		for (Cat3__c category : (List<cat3__c>)con.getRecords())
			categories.add(new CategoryWrapper(category));
 
		return categories;
	}
 
	// displays the selected items
 	public PageReference process() {
 		for (CategoryWrapper cw : categories) {
 			if (cw.checked)
 				ApexPages.addMessage(new ApexPages.message(ApexPages.severity.INFO,cw.cat.name));
 		}
 		return null;
 	}
 
	// indicates whether there are more records after the current page set.
	public Boolean hasNext {
		get {
			return con.getHasNext();
		}
		set;
	}
 
	// indicates whether there are more records before the current page set.
	public Boolean hasPrevious {
		get {
			return con.getHasPrevious();
		}
		set;
	}
 
	// returns the page number of the current page set
	public Integer pageNumber {
		get {
			return con.getPageNumber();
		}
		set;
	}
 
	// returns the first page of records
 	public void first() {
 		con.first();
 	}
 
 	// returns the last page of records
 	public void last() {
 		con.last();
 	}
 
 	// returns the previous page of records
 	public void previous() {
 		con.previous();
 	}
 
 	// returns the next page of records
 	public void next() {
 		con.next();
 	}
 
 	// returns the PageReference of the original page, if known, or the home page.
 	public void cancel() {
 		con.cancel();
 	}
 
}

public class CategoryWrapper {
 
    public Boolean checked{ get; set; }
    public Cat3__c cat { get; set;}
 
    public CategoryWrapper(){
        cat = new Cat3__c();
        checked = false;
    }
 
    public CategoryWrapper(Cat3__c c){
        cat = c;
        checked = false;
    }
 
    public static testMethod void testMe() {
 
    	CategoryWrapper cw = new CategoryWrapper();
    	System.assertEquals(cw.checked,false);
 
    	CategoryWrapper cw2 = new CategoryWrapper(new Cat3__c(name='Test1'));
    	System.assertEquals(cw2.cat.name,'Test1');
    	System.assertEquals(cw2.checked,false);
 
    }
 
}

<apex:page controller="PagingController">
  <apex:form >
    <apex:pageBlock title="Paging through Categories of Stuff">
 
      <apex:pageBlockButtons location="top">
        <apex:commandButton action="{!process}" value="Process Selected"/>
        <apex:commandButton action="{!cancel}" value="Cancel"/>
      </apex:pageBlockButtons>
      <apex:pageMessages />
 
      <apex:pageBlockSection title="Category Results -  Page #{!pageNumber}" columns="1">
        <apex:pageBlockTable value="{!categories}" var="c">
          <apex:column width="25px">
            <apex:inputCheckbox value="{!c.checked}"/>
          </apex:column>
          <apex:column value="{!c.cat.Name}" headerValue="Name"/>
        </apex:pageBlockTable>
      </apex:pageBlockSection>
    </apex:pageBlock>
 
    <apex:panelGrid columns="4">
    <apex:commandLink action="{!first}">First</apex:commandlink>
    <apex:commandLink action="{!previous}" rendered="{!hasPrevious}">Previous</apex:commandlink>
    <apex:commandLink action="{!next}" rendered="{!hasNext}">Next</apex:commandlink>
    <apex:commandLink action="{!last}">Last</apex:commandlink>
    </apex:panelGrid>
 
  </apex:form>
</apex:page>