Foundation
Project Documentation

Summary

Tag name: <tr:singleStepButtonBar>
UIComponent class: org.apache.myfaces.trinidad.component.core.nav.CoreSingleStepButtonBar
Component type: org.apache.myfaces.trinidad.CoreSingleStepButtonBar
SingleStepButtonBar renders a Previous button, text indicating the current step and the maximum steps, and a Next button. SingleStepButtonBar is used to navigate forward and back in a series of steps, like steps in a checkout process.

Events and Listeners

SingleStepButtonBar implements javax.faces.component.ActionSource, which means it is a source of javax.faces.event.ActionEvent's.

The ActionEvent is delivered during the Apply Request Values phase when navigating back, and during the Invoke Application phase when navigating forward.

The nextAction/previousAction attributes are of type MethodBinding and must (if non-null) point to an action method. The nextAction method will be called when navigating forward, and the previousAction method will be called when navigating back with a singleStep component.

JSF has a default javax.faces.event.ActionListener that passes the nextAction or previousAction outcome to the NavigationHandler.

The nextActionListener/previousActionListener attributes are of type MethodBinding and must (in non-null) point to a method accepting an ActionEvent, with a return type of void. When navigating to the previous step, then the previousActionListener method is called. When navigating to the next step, the nextActionListener method is called.

Example(s):

A simple example of a singleStepButtonBar.

<tr:form>
  <tr:singleStepButtonBar selectedStep="2" maxStep="5" previousAction="cart"
                          nextAction="checkout"/>
</tr:form>

Events

Type Phases Description
javax.faces.event.ActionEvent Invoke Application,
Apply Request Values		 Event delivered when the "action" of the component has been invoked; for example, by clicking on a button. The action may result in page navigation.
org.apache.myfaces.trinidad.event.AttributeChangeEvent Invoke Application,
Apply Request Values		 Event delivered to describe an attribute change. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change events might include the width of a column that supported client-side resizing.

Attributes

Name Type Supports EL? Description
attributeChangeListener javax.el.MethodExpression Only EL a method reference to an attribute change listener. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change events might include the width of a column that supported client-side resizing.
binding org.apache.myfaces.trinidad.component.core.nav.CoreSingleStepButtonBar Only EL an EL reference that will store the component instance on a bean. This can be used to give programmatic access to a component from a backing bean, or to move creation of the component to a backing bean.
id String No the identifier for the component. The identifier must follow a subset of the syntax allowed in HTML:
  • Must not be a zero-length String.
  • First character must be an ASCII letter (A-Za-z) or an underscore ('_').
  • Subsequent characters must be an ASCII letter or digit (A-Za-z0-9), an underscore ('_'), or a dash ('-').
inlineStyle String Yes the CSS styles to use for this component.
maxStep int Yes the last possible step. If this value is not known, it should be set to MAX_VALUE_UNKNOWN (-1), which is also the default value. If maxStep is MAX_VALUE_UNKNOWN, then no text is rendered between the Back/Next buttons. When maxStep is 2 and selectedStep is 1, then only a Continue button is rendered.
nextAction javax.faces.el.MethodBinding Only EL a reference to an action method that will be called when the singleStep component navigates to the next step, or the static outcome of the action.
nextActionListener javax.faces.el.MethodBinding Only EL a method reference to an action listener that will be called when the singleStep component navigates to the next step.
onclick String Yes an onclick Javascript handler.
ondblclick String Yes an ondblclick Javascript handler.
onkeydown String Yes an onkeydown Javascript handler.
onkeypress String Yes an onkeypress Javascript handler.
onkeyup String Yes an onkeyup Javascript handler.
onmousedown String Yes an onmousedown Javascript handler.
onmousemove String Yes an onmousemove Javascript handler.
onmouseout String Yes an onmouseout Javascript handler.
onmouseover String Yes an onmouseover Javascript handler.
onmouseup String Yes an onmouseup Javascript handler.
partialTriggers String[] Yes the IDs of the components that should trigger a partial update.

This component will listen on the trigger components. If one of the trigger components receives an event that will cause it to update in some way, this component will request to be updated too.

Separate multiple triggers with a space. e.g., partialTriggers="cmp1 cmp2"

Identifiers must account for NamingContainers. You can use a single colon to start the search from the root, or use multiple colons to move up through the NamingContainer. For example, "::" will pop out of this component's naming container (it pops out of itself if it is a naming container), ":::" will pop out of two naming containers, etc. The search for the partialTrigger begins from there. e.g., partialTriggers=":::commandButton1" the search begins for the component with id = commandButton1 after popping out of two naming containers relative to this component. To go into naming containers, you separate the naming containers with ':', e.g.,partialTriggers= "nc1:nc2:nc3:componentId".
previousAction javax.faces.el.MethodBinding Only EL a reference to an action method that will be called when the singleStep component navigates to the previous step, or the static outcome of the action.
previousActionListener javax.faces.el.MethodBinding Only EL a method reference to an action listener that will be called when the singleStep component navigates to the previous step.
rendered boolean Yes whether the component is rendered. When set to false, no output will be delivered for this component (the component will not in any way be rendered, and cannot be made visible on the client).
selectedStep int Yes the current step. The valid range is 1 to maxStep. It defaults to 1.
shortDesc String Yes The short description of the component. This text is commonly used by user agents to display tooltip help text.
styleClass String Yes a CSS style class to use for this component.
text String Yes the text description of items being navigated. The default is "Step".