tobago-example/tobago-example-demo/src/main/webapp/content/20-component/040-command/10-default/Default_Command.xhtml

<?xml version="1.0" encoding="UTF-8"?>

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<ui:composition template="/main.xhtml"
                xmlns="http://www.w3.org/1999/xhtml"
                xmlns:tc="http://myfaces.apache.org/tobago/component"
                xmlns:ui="http://xmlns.jcp.org/jsf/facelets">

  <p>A normal button, created with <code class="language-markup">&lt;tc:button/></code>, must be actively pressed,
    to run the action. A default-button can be activated, even if not selected.
    For example, the cursor is in an input field and the enter key is pressed.</p>
  <p>A button can be made to a default button with the <code>defaultCommand</code> attribute.
    The default button is highlighted by another color.</p>
  <tc:link label="Tag Library Documentation" image="#{request.contextPath}/image/feather-leaf.png"
           link="#{apiController.tldBase}/#{apiController.currentRelease}/tld/tc/button.html"/>

  <tc:section label="Last Active Button ID">
    <p>To make the examples more clear, the ID of the last active button is displayed in the
      following output field.</p>
    <tc:out id="o1" label="Id" value="#{defaultCommandController.lastActiveButtonId}"/>
  </tc:section>

  <tc:section label="Basics">
    <p>After writing some text into the textfield, the user can press 'ENTER' to activate the submit-button.</p>
    <tc:form>
      <tc:in id="i1" label="Textfield" placeholder="add some text..." value="#{defaultCommandController.value1}"/>
      <tc:out id="o2" label="Value Textfield" value="#{defaultCommandController.value1}"/>
      <tc:button id="submit1" label="Submit 1" defaultCommand="true"
                 actionListener="#{defaultCommandController.click}"/>
    </tc:form>
  </tc:section>

  <tc:section label="Multiple Default Buttons">
    <p>The related default-button is searched in the current <code class="language-markup">&lt;tc:form/></code>.
      If there no default-button could found, the search is continued in the parent form and so on.
      If no default-button found on this way, the button is search outside of a form.</p>
    <p>In this example, the 'Submit A'-button is in a form together with a intputfield and output field.
      The 'Submit B'-button is outside a form.</p>
    <p>Now, if the cursor is in 'Textfield A' and the enter key is pressed, the 'Submit A'-button is activated.
      Therefor only the 'Textfield A'-value will be submitted.</p>
    <p>If the cursor is in 'Textfield B' and the enter key is pressed, the 'Submit B'-button is activated.
      This will submit the 'Textfield A'-value as well as the 'Textfield B'-value.</p>
    <tc:form>
      <tc:box>
        <tc:form>
          <tc:in id="i2" label="Textfield A" placeholder="add some text..." value="#{defaultCommandController.value2}"/>
          <tc:out id="o3" label="Value Textfield A" value="#{defaultCommandController.value2}"/>
          <tc:button id="submitA" label="Submit A" defaultCommand="true"
                     actionListener="#{defaultCommandController.click}"/>
        </tc:form>
      </tc:box>
      <tc:box>
        <tc:form>
          <tc:in id="i3" label="Textfield B" placeholder="add some text..." value="#{defaultCommandController.value3}"/>
          <tc:out id="o4" label="Value Textfield B" value="#{defaultCommandController.value3}"/>
        </tc:form>
      </tc:box>
      <tc:button id="submitB" label="Submit B" defaultCommand="true"
                 actionListener="#{defaultCommandController.click}"/>
    </tc:form>
  </tc:section>
</ui:composition>