<apex:inputCheckbox value="{!SLC.selected}" styleClass="SLC {!SLO.Id}" disabled="true">
    <apex:actionSupport event="onchange" rerender="dataToDisplay" />
</apex:inputCheckbox>

public void setSelected(Boolean selected){
            this.selected=selected;
            system.debug('modif SLC : '+this.name);
            if(owner!=null){
                if(selected){
                    // add in map
                }
                else{
                    // remove from map
                }

<apex:page controller="myController">
    <apex:form >
        <apex:actionFunction action="{!doSmthg}" name="functionToLaunch" rerender="toReRender"/>

        <div>
            <apex:inputCheckbox value="{!checked}" onchange="functionToLaunch"/>
            <label>Click-me</label>
        </div>

        <apex:pageBlock id="toReRender" >
            <apex:outputtext >{!value}</apex:outputtext>
            <span>{!indice}</span>
        </apex:pageBlock>
    </apex:form>
</apex:page>

public with sharing class myController{
    // fields
    public String value {get; set;}
    public Boolean checked {get; set;}
    public DateTime indice {get; set;}

    // constructor - initialization
    public CampaignVFManagerController_test1(){
        value='Nothing yet';
        indice=datetime.now();
    }

    // methods
    public void doSmthg(){
        indice=datetime.now();
        if(checked){
            value = 'i have been checked';
        }
        else{
            value = 'i have been unchecked';
        }
    }
}