I have this code inside dataGrid. When this is rendered f:param return null. If I click on p:selectBooleanCheckbox f:param return the correct ID of particular item in the grid. How can I force f:param to return correct ID when rendered. I need to achieve this: I show user multiple items in dataGrid. I use pagging as well. I want user to be able to select multiple items for comparison table. This all works. The problem is when user goes back and forward in datagrid. p:selectBooleanCheckbox is always unchecked even though user selected this before
<p:selectBooleanCheckbox itemLabel="Compare" value="#{compare.checkCompare}">
<f:param name = "id2" value="#{camp.campID}" />
<p:ajax listener="#{compare.compare()}" />
</p:selectBooleanCheckbox>
Related
I have a JSF 2 page with an <h:button>. I want to pass two <f:param> to the outcome page.
Value of <f:param> pOne comes from the page bean.
Value of <f:param> pTwo comes from an input field on the page.
pTwo's value is not stored on the page bean.
pTwo's input field value is set by javascript when user clicks on an image map within same page.
The problem is that the request passes null for param pTwo.
If I set the value of pTwo to a static value, value="12345", then 12345 is passed.
So, why does <f:param> not pass the value of a input field from the source page?
Thanks!
<input type="text" id="pTwo"/>
<h:button value="Go" outcome="destPage">
<f:param name="pOne" value=#{myBean.pOne}"/>
<f:param name="pTwo" value=#{pTwo}"/>
</h:button>
You cannot reference the value of the input field in an EL expression like this. Not even if you use h:inputText.
Furthermore, JSF calculates the link for the button including the parameters when the page is rendered on server side. So when the user sees the page and enters something in the input field, the URL for the link is already fixed and won't change.
To solve this in a similar way, you could use h:commandButton instead of h:button, submit the form including the value for pTwowith h:inputText and return a redirect to the new page. The XHTML for this could look like this:
<h:form>
<h:inputText value="#{bean.pTwo}"/>
<h:commandButton action="#{bean.goToDest}" value="Go"/>
</h:form>
The referenced action method could look like this:
public String goToDest() {
return "destPage?faces-redirect=true&pOne=" + pOne + "&pTwo=" + pTwo;
}
try use the following code:
<h:commandButton action="#{bean.goToDest}" value="Go" >
<f:setPropertyActionListener target="#{yourDestinyManagedBean.pOne}" value="#{yourManagedBean.pOne}" />
<f:setPropertyActionListener target="#{youDestinyManagedBean.pTwo}" value="#{yourManagedBean.pTwo}" />
</h:commandButton>
You can see an example here.
JSF-2.0, Mojarra 2.1.19, PrimeFaces 3.4.1
Summary of the problem: Have a p:inputText inside p:dataTable and inputText action fired by p:remoteCommand which passes the dataTable row index as a parameter with f:setPropertyActionListener. But it always passes the last row of the dataTable, not the index of the row which includes currently clicked p:inputText.
As it can be seen from my previous questions, I am trying to use p:inputText as a comment taker for a status like in Facebook or etc. Implementation includes a p:dataTable. It's rows represents each status. Seems like:
<p:dataTable id="dataTable" value="#{statusBean.statusList}" var="status"
rowIndexVar="indexStatusList">
<p:column>
<p:panel id="statusRepeatPanel">
<p:remoteCommand name="test" action="#{statusBean.insertComment}"
update="statusRepeatPanel">
<f:setPropertyActionListener
target="#{statusBean.indexStatusList}"
value="#{indexStatusList}">
</f:setPropertyActionListener>
</p:remoteCommand>
<p:inputText id="commentInput" value="#{statusBean.newComment}"
onkeypress="if (event.keyCode == 13) { test(); return false; }">
</p:inputText>
</p:panel>
</p:column>
</p:dataTable>
Upper code says when the press enter key, fire p:remoteCommand which calls the insert method of the managed bean.
#ManagedBean
#ViewScoped
public class StatusBean {
List<Status> statusList = new ArrayList<Status>();
public int indexStatusList;
public String newComment
//getters and setters
public void insertComment() {
long statusID = findStatusID(statusList.get(indexStatusList));
statusDao.insert(this.newComment,statusID)
}
Let's debug together; assuming there are three statuses shown in the p:dataTable, click in the p:inputText which in the second status(index of 1), type "relax" and press the enter key.
In the debug console, it correctly shows "relax", but it finds the wrong status because indexStatusList has the value of 2 which belongs the last status in the p:statusList. It must be 1 which is the index of p:inputText that clicked on the dataTable row.
I think problem is about p:remoteCommand which takes the last index on the screen.
How it works?
Let's imagine there is a p:commandLink instead of p:remoteCommand and p:inputText:
<p:commandLink action=#{statusBean.insertComment>
<f:setPropertyActionListener target="#{statusBean.indexStatusList}"
value="#{indexStatusList}"></f:setPropertyActionListener>
This component successfully passes the indexStatusList as currently clicked one.
Conceptual problem in this solution lies in way how p:remoteCommand works. It creates JavaScript function whose name is defined in name attribute of p:remoteCommand. As you putted this in dataTable it will iterate and create JavaScript function called test as many times as there is rows in this table, and at the end last one will be only one. So, solution can be in appending index at the name of the remoteCommand but that is bad, because you will have many unnecessary JavaScript functions. Better approach would be to create one function an pass argument to it. So define remoteCommand outside of datatable:
<p:remoteCommand name="test" action="#{statusBean.insertComment}" update="statusRepeatPanel">
and call test function like this in your onkeypress event:
test([{ name: 'rowNumber', value: #{indexStatusList} }])
This will pass rowNumber parameter in your AJAX request. In backing bean's insertComment() method you can read this parameter and do with it anything you want:
FacesContext context = FacesContext.getCurrentInstance();
Map map = context.getExternalContext().getRequestParameterMap();
Integer rowNumber = Integer.parseInt(map.get("rowNumber").toString());
NOTE: as you are updating panel in each row, maybe you can change update attribute of remoteCommand to #parent so this will work for all rows.
EDIT: You can update the specific panel in specific row with following code in Java method:
RequestContext.getCurrentinstance().update("form:dataTable:" + rowNumber + ":statusRepeatPanel")
I need to use a list box to show some values from database and do further processing when a single value from the list is selected.
At the PrimeFaces showcase site the example loads fixed (static) data into the listbox and there is one PrimeFaces command for each list item. How do I show items in a list box dynamically, when I may not know the number of items beforehand?
I also need to show some text corresponding to the item selected in list, in a textarea. Do I have to use an event listener for this purpose? I would like to leave the text area blank at the beginning. Only when a value is selected in the list box, then I want to use a bean to retrieve and store data using that textarea. Is this possible? How do I implement this?
How do I show items in a list box dynamically, when I may not know the number of items beforehand?
Use <f:selectItems> which you bind to a List<T> property. Basic example, assuming you're using EJB/JPA to interact with DB:
private Item selectedItem; // +getter+setter
private List<Item> availableItems; // +getter
#EJB
private ItemService service;
#PostConstruct
public void init() {
availableItems = service.list();
}
with
<p:selectOneListbox value="#{bean.selectedItem}" converter="itemConverter">
<f:selectItems value="#{bean.availableItems}" var="item"
itemValue="#{item}" itemLabel="#{item.someLabel}" />
</p:selectOneListbox>
The itemConverter should implement javax.faces.convert.Converter and convert from the Item object to its unique string representation (usually its DB identifier) in getAsString() and convert the other way round getAsObject().
I also need to show some text corresponding to the item selected in list, in a textarea. Do I have to use an event listener for this purpose?
Just put a <p:ajax> (the PrimeFaces equivalent of standard JSF <f:ajax>) in the listbox which updates the textarea. E.g.
<p:selectOneListbox value="#{bean.selectedItem}" converter="itemConverter">
<f:selectItems value="#{bean.availableItems}" var="item"
itemValue="#{item}" itemLabel="#{item.someLabel}" />
<p:ajax update="textarea" />
</p:selectOneListbox>
<p:inputTextarea id="textarea" value="#{bean.selectedItem.someText}" />
It'll be invoked when you select an item.
See also:
Our h:selectOneMenu wiki page - same applies to PrimeFaces p:selectOneListbox
Yes, for demonstration purposes most of the examples are loaded with static data. But if you look at the same example on PF showcase, the second listbox code is as follows:
<h:outputText value="Scrollbar: " />
<p:selectOneListbox id="scroll" value="#{autoCompleteBean.selectedPlayer1}"
converter="player" style="height:100px">
<f:selectItems value="#{autoCompleteBean.players}"
var="player" itemLabel="#{player.name}" itemValue="#{player}" />
</p:selectOneListbox>
and f:selectItems value attribute can point to a collection, an array, a map or a SelectItem instance. So coming to the above example players could be any list that is being populated using a database in the managed bean.
But if the instance is not a SelectItem, the labels are obtained by calling a toString on each object and finally the selected itemValue is set to the selectedPlayer1 attribute but you can also see that there is a converter in between so the incoming itemValue string is converted back to a player object and then set to selectedPlayer1.
And if you want to display the selected item in a text area, you can do something like this:
<h:outputText value="Scrollbar: " />
<p:selectOneListbox id="scroll" value="#{autoCompleteBean.selectedPlayer1}"
converter="player" style="height:100px">
<f:selectItems value="#{autoCompleteBean.players}"
var="player" itemLabel="#{player.name}" itemValue="#{player}" />
<p:ajax update="displayArea"/>
</p:selectOneListbox>
<p:inputTextarea id="displayArea" value="#{autoCompleteBean.selectedPlayer1}" />
Here the inputTextarea is updated using ajax with the value selected by the user.
I have this code above which works perfectly when i select some of the items on him... The a4j:support works fine and rerender my another field correctly...
The problem is if i choose one item, and then i back to "noSelectionLabel"...
When i do this for some reason my a4j:support dont work, i dont get into my method "setarFormulario" and i dont rerender my another field...
<s:decorate template="layout/form.xhtml">
<ui:define name="label">Evento:</ui:define>
<h:selectOneMenu value="#{home.instance.evento}" required="true">
<s:selectItems value="#{eventoService.obterTodos()}" var="evento" label="#{messages[evento.nome]}" noSelectionLabel="#{messages['br.com.message.NoSelection']}" />
<s:convertEntity />
<a4j:support event="onchange" action="#{home.setarFormulario}" reRender="camposFormulario" ajaxSingle="true" />
</h:selectOneMenu>
</s:decorate>
How can i get into my method even if i select the noSelectionLabel? Then my home.instance.evento must be null.. or something like this...
Yor field h:selectOneMenu is required then selecting noSelectionLabel value will cause a validation error and if you had validation error, then the action="#{home.setarFormulario}" would never be called.
As a workaround you can set to true the attribute hideNoSelectionLabel for your s:selectItems then the noSelectionLabel will be hidden when a value is selected
<h:message for="id of the selectonemenu component " ></h:message>
or
remove the required =true from the selectonemenu tag
I have a bean with 5 properties.In which user has to enter the values and save the values.The saved values are displayed in a datatable by ajax functionality.It is working fine.The problem is when i want to edit the record, i have the edit button associated with every row of the table.When edit button is clicked i have to get the record and show the record in editable format above the datatable.What component i have to use to populate the data for editing ? Edit button is also an ajax request.I used panelGrid for that but i did not get them.
could you suggest the right way to solve this one.
Thank you all.........
Use the same datatable for editing.
If you click edit button, store the selected value or index in the backing bean and
render an output component like h:outputText if rowValue != selectedItem
render an input component like h:inputText if rowValue == selectedItem
in your dataTable.
Here is an example:
<h:dataTable value="#{myBean.itemList}" var="item">
<h:column>
<h:outputText value="#{item.someValue}"
rendered="#{item != selectedItem}"/>
<h:inputText value="#{item.someValue}"
rendered="#{item == selectedItem}" />
</h:column>
</h:dataTable>