Summary
Tag name:
<tr:train>
UIComponent class:
org.apache.myfaces.trinidad.component.core.nav.CoreTrain
Component type:
org.apache.myfaces.trinidad.CoreTrain
Naming container:
Yes. When referring to children of this component ("partialTriggers", findComponent()
, etc.), you must prefix the child's ID with this component's ID and a colon (':').
Model
The train takes a model of typeorg.apache.myfaces.trinidad.model.MenuModel
. The
last node along the focusPath and its siblings are rendered.
MenuModel extends TreeModel, but it also knows how to go from the current viewId to the focus path. Notice that the menuModel has no special knowledge of page navigation and places no requirements on the nodes that go into the tree. The nodes in the tree are stamped out with the 'nodeStamp' facet, which should contain a commandNavigationItem component, which allows the default actionListener mechanism to be used for page navigation.
There are two common scenarios for processes, "Plus One" and "Max Visited" which are explained below.
- "Plus One" - from the current step the user can navigate to any previous page and the next page. If the user is on the 5th step of a process and goes back to step 2, then the user can only navigate from step 2 to step 1 and step 3.
- "Max Visited" - the user can navigate to the max visited page. If the user is currently on the max visited page then the user can also navigate to the next page. If the user is on the 5th step of a process and goes back to step 2, then the user can navigate from step 2 to steps 1, 2, 3, 4, and 5.
org.apache.myfaces.trinidad.model.ProcessMenuModel
and org.apache.myfaces.trinidad.model.ProcessUtils
were created to support the "Plus One" and
"Max Visited" scenarios. Please see the javadoc for these
classes for more information.
When the focusPath is not focused on a top level node, images are rendered before and after the train to indicate that this train is part of a sub-process
Example(s):
This is an example of a train.
<tr:train var="node" value="#{processMenuModel}"> <f:facet name="nodeStamp"> <tr:commandNavigationItem text="#{node.label}" action="#{node.getOutcome}" immediate="#{processMenuModel.immediate}" readOnly="#{processMenuModel.readOnly}"/> </f:facet> </tr:train>
Events
Type | Phases | Description |
---|---|---|
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. |
Supported Facets
Name | Description |
---|---|
nodeStamp | the component to use to stamp each element in the process. A CommandNavigationItem is expected. |
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. |
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:
|
inlineStyle | String | Yes | the CSS styles to use for this component. |
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". |
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). |
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. |
value | Object | Yes | the hierarchy of data - must be of type org.apache.myfaces.trinidad.model.MenuModel |
var | String | No | Name of the EL variable used to reference each element of this collection. Once this component has completed rendering, this variable is removed (or reverted back to its previous value). |
varStatus | String | No |
Name of the EL variable used to reference the varStatus information.
Once this component has completed rendering, this variable is
removed (or reverted back to its previous value).
The VarStatus provides contextual information about the state of the
component to EL expressions. For components that iterate, varStatus
also provides loop counter information. Please see the this
component's documentation for the specific properties on the varStatus.
The common properties on varStatus include:
|