How to generate a value to field in a row based on another two fields in the same row ???

Question

I have a quantity and unit price and there is also a field in the same row called total price. I want to get the value automatically of total price from multiplying quantity and unit price.

Answer 1

Here you go:
page code
                        <af:panelGroupLayout id="pgl2" layout="horizontal" styleClass="AFStretchWidth">
                            <af:inputText label="Quantity" id="quantity" value="#{bindings.quantity1.inputValue}" autoSubmit="true"
                                          valueChangeListener="#{SetItemBean.valueChangeListenerItem}"/>
                            <af:spacer width="10" height="10" id="s1"/>
                            <af:inputText label="Price" id="price" value="#{bindings.price1.inputValue}" autoSubmit="true"
                                          valueChangeListener="#{SetItemBean.valueChangeListenerItem}"/>
                            <af:spacer width="10" height="10" id="s2"/>
                            <af:inputText label="Sum" id="total" value="#{bindings.total1.inputValue}" partialTriggers="quantity price" readOnly="true"/>
                        </af:panelGroupLayout>
page bindings
<?xml version="1.0" encoding="UTF-8" ?>
<pageDefinition xmlns="http://xmlns.oracle.com/adfm/uimodel" version="12.1.2.66.68" id="SetItemPageDef" Package="de.hahn.blogtest12c.view.pageDefs">
  <parameters/>
  <executables>
    <variableIterator id="variables">
      <variable Name="quantity" Type="java.lang.Number"/>
      <variable Name="price" Type="java.lang.Number"/>
      <variable Name="total" Type="java.lang.Number"/>
    </variableIterator>
  </executables>
  <bindings>
    <attributeValues IterBinding="variables" id="quantity1">
      <AttrNames>
        <Item Value="quantity"/>
      </AttrNames>
    </attributeValues>
    <attributeValues IterBinding="variables" id="price1">
      <AttrNames>
        <Item Value="price"/>
      </AttrNames>
    </attributeValues>
    <attributeValues IterBinding="variables" id="total1">
      <AttrNames>
        <Item Value="total"/>
      </AttrNames>
    </attributeValues>
  </bindings>
</pageDefinition>
and bean code
    public void valueChangeListenerItem(ValueChangeEvent valueChangeEvent) {
        String comp = valueChangeEvent.getComponent().getId();
        BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
        // get an ADF attributevalue from the ADF page definitions
        AttributeBinding attr = (AttributeBinding) bindings.getControlBinding("quantity1");
        Number q = (Number) attr.getInputValue();
        if (q == null)
            q = 0;
        attr = (AttributeBinding) bindings.getControlBinding("price1");
        Number p = (Number) attr.getInputValue();
        if (p == null)
            p = 0;
        if ("price".equals(comp)) {
            p = (Number) valueChangeEvent.getNewValue();
        } else {
            q = (Number) valueChangeEvent.getNewValue();
        // set new value
        attr = (AttributeBinding) bindings.getControlBinding("total1");
        Number t = q.doubleValue() * p.doubleValue();
        attr.setInputValue(t);
        // update Total
        FacesContext facesCtx = FacesContext.getCurrentInstance();
        UIComponent ui = facesCtx.getViewRoot().findComponent("total");
        if (ui != null) {
            // PPR refresh a jsf component
            AdfFacesContext.getCurrentInstance().addPartialTarget(ui);
Timo