Hi everyone,

So, I was working on a visualforce page. I would like to know if there is a way to prevent the first Page Block Button from running when you press the enter key. I would like the enter key to run another function in my controller. If you need anything more from me please let me know.

** Visualforce code:

<apex:page controller="CalcController">
<apex:form id="form">
    <apex:pageBlock title="Margin Calculator" id="page">
        <apex:pageBlockButtons >
            <apex:commandButton value="Back" action="/home/home.jsp"/>
            <apex:commandButton value="Calculate" id="test"/>
        </apex:pageBlockButtons>
        <apex:messages style="font-size:16px; color:red;" id="error"/>
        <apex:pageBlockSection columns="1" id="Main">
            <!--<apex:inputField />-->
            <apex:selectList value="{!Type}" size="1" label="Pay Status">
                <apex:selectOption itemLabel="W2-Hourly" itemValue="W2-Hourly"/>
                <apex:selectOption itemLabel="Corp-Empl" itemValue="Corp-Empl"/>
                <apex:selectOption itemLabel="Corp-Prin" itemValue="Corp-Prin"/>
                <apex:selectOption itemLabel="SS-1099" itemValue="SS-1099"/>
                <apex:selectOption itemLabel="Salary" itemValue="Salary"/>
                <apex:actionSupport event="onchange" action="{!Calculate}" reRender="page"/>
            </apex:selectList>
            <apex:inputText label="Pay Rate" value="{!PayRate}" onkeypress="return noenter();">
            </apex:inputText>
            <apex:inputText label="Bill Rate" value="{!BillRate}">
                <apex:actionSupport event="onchange" action="{!Calculate}" reRender="page"/>
            </apex:inputText>
            <apex:inputText label="Discount Percent" value="{!DiscountPercent}">
                <apex:actionSupport event="onchange" action="{!Calculate}" reRender="page"/>
            </apex:inputText>
            <apex:pageBlockSectionItem >
                <apex:outputLabel />
                <apex:commandButton value="Clear" action="{!Clear}"/>
            </apex:pageBlockSectionItem>
        <!--<apex:inputText label="Gross Margin" value="{!GrossMargin}"/>
            <apex:inputText label="Gross Margin Pct" value="{!GrossMarginPct}"/>-->
            <apex:outputText label="Gross Margin" value="${!GrossMargin}"/>
            <apex:outputText label="Gross Margin Pct" value="{!GrossMarginPct}%"/>
        </apex:pageBlockSection>
    </apex:pageBlock>
</apex:form>
</apex:page>

** Controller Code:

public class CalcController {
    public String Type             { get; set; }
    public Decimal BillRate        { get; set; }
    public Decimal PayRate         { get; set; }
    public Decimal DiscountPercent { get; set; }
    public Decimal GrossMargin     { get; set; }
    public Decimal GrossMarginPct  { get; set; }
    public CalcController(){
        
    }
    public void Calculate(){
        if(DiscountPercent == null)
            DiscountPercent = 0;
        if(Type=='Corp-Empl' || Type=='Corp-Prin' || Type=='SS-1099'){
            if(BillRate != null && PayRate != null && BillRate != 0 && PayRate != 0){   
                GrossMargin = BillRate - PayRate - (PayRate*0.03) - (BillRate*(DiscountPercent/100));
                GrossMarginPct = 100*(GrossMargin / (BillRate - (BillRate * (DiscountPercent/100))));
                GrossMargin = GrossMargin.setScale(2, System.RoundingMode.HALF_UP);
                GrossMarginPct = GrossMarginPct.setScale(2, System.RoundingMode.HALF_UP);
            }
            else{
                ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.ERROR, 'ERROR: Please enter the Bill Rate and Pay Rate');
                ApexPages.addMessage(myMsg);
            }
            /*if(GrossMargin != null && GrossmarginPct != null && GrossMargin != 0 && GrossMarginPct != 0){
                BillRate = (GrossMargin/(GrossMarginPct/100));
                BillRate += (BillRate*(DiscountPercent/100));
                PayRate = ((GrossMargin - BillRate + (BillRate*(DiscountPercent/100)))/-1.03);
                BillRate = BillRate.setScale(2, System.RoundingMode.HALF_UP);
                PayRate = PayRate.setScale(2, System.RoundingMode.HALF_UP);
            }
            else if(BillRate != null && PayRate != null && BillRate != 0 && PayRate != 0){   
                GrossMargin = BillRate - PayRate - (PayRate*0.03) - (BillRate*(DiscountPercent/100));
                GrossMarginPct = 100*(GrossMargin / (BillRate - (BillRate * (DiscountPercent/100))));
            }
            else{
                ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.ERROR, 'ERROR: Please enter the Bill Rate and Pay Rate or Gross Margin and Gross Margin Pct');
                ApexPages.addMessage(myMsg);
            }*/
        }
        else if(Type=='Salary'){
            if(BillRate != null && PayRate != null && BillRate != 0 && PayRate != 0){   
                GrossMargin = BillRate - PayRate - (PayRate*0.25) - (BillRate*(DiscountPercent/100));
                GrossMarginPct = 100*(GrossMargin / (BillRate - (BillRate * (DiscountPercent/100))));
                GrossMargin = GrossMargin.setScale(2, System.RoundingMode.HALF_UP);
                GrossMarginPct = GrossMarginPct.setScale(2, System.RoundingMode.HALF_UP);
            }
            else{
                ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.ERROR, 'ERROR: Please enter the Bill Rate and Pay Rate');
                ApexPages.addMessage(myMsg);
            }
            /*if(GrossMargin != null && GrossMarginPct != null && GrossMargin != 0 && GrossMarginPct != 0){
                BillRate = (GrossMargin/(GrossMarginPct/100));
                BillRate += (BillRate*(DiscountPercent/100));
                PayRate = ((GrossMargin - BillRate + (BillRate*(DiscountPercent/100)))/-1.25);
                BillRate = BillRate.setScale(2, System.RoundingMode.HALF_UP);
                PayRate = PayRate.setScale(2, System.RoundingMode.HALF_UP);
            }
            else if(BillRate != null && PayRate != null && BillRate != 0 && PayRate != 0){
                GrossMargin = BillRate - PayRate - (PayRate*0.25) - (BillRate*(DiscountPercent/100));
                GrossMarginPct = 100*(GrossMargin / (BillRate - (BillRate * (DiscountPercent/100))));
            }
            else{
                ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.ERROR, 'ERROR: Please enter the Bill Rate and Pay Rate or Gross Margin and Gross Margin Pct');
                ApexPages.addMessage(myMsg);
            }*/
        }
        else if(Type=='W2-Hourly'){
            if(BillRate != null && PayRate != null && BillRate != 0 && PayRate != 0){   
                GrossMargin = BillRate - PayRate - (PayRate*0.15) - (BillRate*(DiscountPercent/100));
                GrossMarginPct = 100*(GrossMargin / (BillRate - (BillRate * (DiscountPercent/100))));
                GrossMargin = GrossMargin.setScale(2, System.RoundingMode.HALF_UP);
                GrossMarginPct = GrossMarginPct.setScale(2, System.RoundingMode.HALF_UP);
            }
            else{
                ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.ERROR, 'ERROR: Please enter the Bill Rate and Pay Rate');
                ApexPages.addMessage(myMsg);
            }
            /*if(GrossMargin != null && GrossMarginPct != null && GrossMargin != 0 && GrossMarginPct != 0){
                BillRate = (GrossMargin/(GrossMarginPct/100));
                BillRate += (BillRate*(DiscountPercent/100));
                PayRate = ((GrossMargin - BillRate + (BillRate*(DiscountPercent/100)))/-1.15);
                BillRate = BillRate.setScale(2, System.RoundingMode.HALF_UP);
                PayRate = PayRate.setScale(2, System.RoundingMode.HALF_UP);
            }
            else if(BillRate != null && PayRate != null && BillRate != 0 && PayRate != 0){
                GrossMargin = BillRate - PayRate - (PayRate*0.15) - (BillRate*(DiscountPercent/100));
                GrossMarginPct = 100*(GrossMargin / (BillRate - (BillRate * (DiscountPercent/100))));
            }
            else{
                ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.ERROR, 'ERROR: Please enter the Bill Rate and Pay Rate or Gross Margin and Gross Margin Pct');
                ApexPages.addMessage(myMsg);
            }*/
        }
    }
    public void Clear(){
        BillRate = PayRate = DiscountPercent = GrossMargin = GrossMarginPct = 0;
    }
    
    static testMethod void TestController(){
        CalcController controller = new CalcController();
        controller.Type ='Corp-Prin';
        controller.PayRate = 35.00;
        controller.BillRate = 55.00;
        controller.DiscountPercent = 0.00;
        controller.Calculate();
        controller.Type ='Corp-Prin';
        controller.PayRate = 0.00;
        controller.BillRate = 0.00;
        controller.DiscountPercent = 0.00;
        controller.Calculate();
        controller.Type ='Salary';
        controller.PayRate = 35.00;
        controller.BillRate = 55.00;
        controller.DiscountPercent = 0.00;
        controller.Calculate();
        controller.Type ='Salary';
        controller.PayRate = 0.00;
        controller.BillRate = 0.00;
        controller.DiscountPercent = 0.00;
        controller.Calculate();
        controller.Type ='W2-Hourly';
        controller.PayRate = 35.00;
        controller.BillRate = 55.00;
        controller.DiscountPercent = 0.00;
        controller.Calculate();
        controller.Type ='W2-Hourly';
        controller.PayRate = 0.00;
        controller.BillRate = 0.00;
        controller.DiscountPercent = 0.00;
        controller.Calculate();
        controller.Clear();
    }
}