public with sharing class ImplementationTaskReportCtrl
{
    public String PLAN_YEAR_ID;
    public final String SHOW_IMPTS = 'show';

    public List<Implementation__c> Implementation{get;set;}
    public List<Implementation_Task__c> ImplementationTasks{get;set;}

    public ImplementationTaskReportCtrl ()
    {
        PLAN_YEAR_ID = Apexpages.currentPage().getParameters().get('Id');
        if( PLAN_YEAR_ID instanceof Id  ){intialize();}
        else{Apexpages.addMessage( new Apexpages.Message( ApexPages.Severity.ERROR, Label.Invalid_Id_Error ) );}
    }

    private void intialize()
    {
        Implementation = [ SELECT Id, Name, Total_Required_Tasks__c, Plan_Year_1__c, Percent_Complete__c, Completed_Tasks__c,
                                                        ( SELECT Name, Completed_Date__c, Due_Date__c, Current_Notes__c, Historical_Notes__c FROM Implementation_Tasks__r WHERE In_Reports__c = :SHOW_IMPTS ORDER BY Due_Date__c )
                            FROM Implementation__c
                            WHERE Plan_Year_1__c = :PLAN_YEAR_ID ];

        if( Implementation == NULL || Implementation.isEmpty() )
        {
            Apexpages.addMessage( new Apexpages.Message( ApexPages.Severity.ERROR, Label.No_Plan_Year_Related_IMP_Error ) );
        }
        else
        {
            ImplementationTasks = [ SELECT Name, Implementation__c, Completed_Date__c, Due_Date__c, Current_Notes__c, Historical_Notes__c FROM Implementation_Task__c
                                        WHERE Implementation__c IN :Implementation AND ( Due_Date__c < TODAY OR Due_Date__c = THIS_WEEK ) AND Completed_Date__c = null
                                        ORDER BY Due_Date__c ];
        }
    }

    public PageReference saveIMPTasksDueThisWeekAndStay ()
    {
        return save( ImplementationTasks, false );
    }

    public PageReference saveIMPTasksDueThisWeekAndGoBack ()
    {
        return save( ImplementationTasks, true );
    }

    public PageReference saveIMPTasksAndStay ()
    {
        List<Implementation_Task__c> IMPTasksToBeSaved = getAllIMPTasks();
        return save( IMPTasksToBeSaved, false );
    }

    public PageReference saveIMPTasksAndGoBack ()
    {
        List<Implementation_Task__c> IMPTasksToBeSaved = getAllIMPTasks();
        return save( IMPTasksToBeSaved, true );
    }

    private List<Implementation_Task__c> getAllIMPTasks ()
    {
        List<Implementation_Task__c> IMPTasksToBeSaved = new List<Implementation_Task__c>();
        for( Implementation__c aIMP : Implementation )
        {
            for( Implementation_Task__c aTask : aIMP.Implementation_Tasks__r )
            {
                IMPTasksToBeSaved.add( aTask );
            }
        }
        return IMPTasksToBeSaved;
    }

    private PageReference save ( List<Implementation_Task__c> IMPTasksToBeUpdated, Boolean goback )
    {
        try
        {
            update IMPTasksToBeUpdated;
        }
        catch ( Exception ex )
        {
            Apexpages.addMessage( new Apexpages.Message( ApexPages.Severity.ERROR, ex.getMessage() ) );
            return NULL;
        }
        return ( goback ?  back () : stay() );
    }

    public PageReference back()
    {
        return new PageReference ( '/' + PLAN_YEAR_ID );
    }

    private PageReference stay()
    {
        intialize();
        return NULL;
    }
    }

<apex:page id="IMPTaskReport" controller="ImplementationTaskReportCtrl" sidebar="True" >

    <style type="text/css">
          div.pbSubheader{
            color:black !important;
            }
          .textArea-currentNotes-pbt { resize: none; width: 85%; }
    </style>
    <script>

        function setFocusOnLoad() {}
    </script>

<apex:PageMessages id="msgs"/>
<!-- <apex:includeScript value="{!$Resource.sorttableJS}"/>  -->

<apex:form >
        <apex:pageBlock title="Implementation Tasks Due This Week">
            <apex:PageBlockButtons >
                <apex:commandButton value="Save and Close" action="{!saveIMPTasksDueThisWeekAndGoBack}" rerender="msgs"/>
                <apex:commandButton value="Save and Stay" action="{!saveIMPTasksDueThisWeekAndStay}" rerender="msgs, pb, pbt-1"/>
                <apex:commandButton value="Close" action="{!back}"/>
            </apex:PageBlockButtons>
            <apex:pageBlockTable id="pbt-1" value="{!ImplementationTasks}" var="impTask">
                <apex:column headerValue="{!$ObjectType.Implementation_Task__c.fields.name.label}" width="15%">
                             <apex:outputLink value="/{!IMPTask.ID}" target="_blank"> {!IMPTask.name} </apex:outputLink>
                </apex:column>
                <apex:column value="{!IMPTask.Implementation__c}" width="10%"/>
                <apex:column value="{!IMPTask.Implementation_1__c}" width="10%"/>
                <apex:column headerValue="{!$ObjectType.Implementation__c_Task__c.fields.Completed_Date__c.label}" width="5%">
                    <apex:inputField value="{!IMPTask.Completed_Date__c}" />
                </apex:column>
                <apex:column headerValue="{!$ObjectType.Implementation__c_Task__c.fields.Due_Date__c.label}"  width="10%">
                    <apex:inputField value="{!impTask.Due_Date__c}" />
                </apex:column>
                <apex:column headerValue="{!$ObjectType.Implementation__c_Task__c.fields.Current_Notes__c.label}" >
                    <apex:inputTextArea rows="3" value="{!IMPTask.Current_Notes__c}"  styleClass="textArea-currentNotes-pbt"/>
                </apex:column>
                <apex:column headerValue="{!$ObjectType.Implementation_Task__c.fields.Historical_Notes__c.label}" >
                    <apex:inputTextArea disabled="true" rows="3" value="{!IMPTask.Historical_Notes__c}" styleClass="textArea-currentNotes-pbt" />
                </apex:column>
            </apex:pageBlockTable>
        </apex:pageBlock>
        &nbsp;
        &nbsp;
        &nbsp;
        &nbsp;

        <apex:pageBlock id="pb" title="Plan Year Related Implementation Tasks">
            <apex:PageBlockButtons >
                <apex:commandButton value="Save and Close" action="{!saveIMPTasksAndGoBack}"  rerender="msgs"/>
                <apex:commandButton value="Save and Stay" action="{!saveIMPTasksAndStay}" rerender="msgs, pbt-1, pb "/>

                <apex:commandButton value="Close" action="{!back}"/>
            </apex:PageBlockButtons>

             <apex:repeat id="rpt" value="{!Implementation}" var="IMP">
             <apex:pageBlockSection title="Title" collapsible="true" rendered="false"/>
                <apex:pageBlockSection title="{!IMP.Name} : {!$ObjectType.Implementation__c.fields.Completed_Tasks__c.label}: {!IMP.Completed_Tasks__c}, {!$ObjectType.Implementation__c.fields.Total_Required_Tasks__c.label}: {!IMP.Total_Required_Tasks__c}, {!$ObjectType.Implementation__c.fields.Percent_Complete__c.label}: {!IMP.Percent_Complete__c}"
                                            columns="1"  collapsible="true">

                    <apex:pageBlockTable id="IMPtable" value="{!sos.Implementation_Task__r}" var="IMPTask">
                        <apex:column headerValue="{!$ObjectType.Implementation_Task__c.fields.name.label}" width="15%">
                             <apex:outputLink value="/{!IMPTask.ID}" target="_blank"> {!IMPTask.name} </apex:outputLink>
                        </apex:column>
                        <apex:column value="{!IMPTask.Implementation_1__c}" width="15%"/>
                        <apex:column headerValue="{!$ObjectType.Implementation_Task__c.fields.Completed_Date__c.label}"  width="5%">
                            <apex:inputField value="{!IMPTask.Completed_Date__c}" />
                        </apex:column>
                        <apex:column headerValue="{!$ObjectType.Implementation_Task__c.fields.Due_Date__c.label}"  width="9%">
                            <apex:inputField value="{!IMPTask.Due_Date__c}" />
                        </apex:column>
                        <apex:column headerValue="{!$ObjectType.Implementation_Task__c.fields.Current_Notes__c.label}" width="28%">
                            <apex:inputTextArea rows="3" value="{!IMPTask.Current_Notes__c}"  styleClass="textArea-currentNotes-pbt"/>
                        </apex:column>
                        <apex:column headerValue="{!$ObjectType.Implementation_Task__c.fields.Historical_Notes__c.label}" width="28%">
                            <apex:inputTextArea disabled="true" rows="3" value="{!IMPTask.Historical_Notes__c}" styleClass="textArea-currentNotes-pbt" />
                        </apex:column>
                    </apex:pageBlockTable>
                </apex:pageBlockSection>

             </apex:repeat>
         </apex:pageBlock>
</apex:form>
</apex:page>