I have a dialog which need to be rerender after a certain selectOneMenu ist chosen.
To accomplish that, the following code is used inside the selectOneMenu:
<p:ajax event="valueChange" oncomplete="PF('dialog').initPosition();" update="panelGrid" />
However, after the dialog is rerendered, all user inputs in my p:inputTextare lost (reset to value from java bean).
How can I make the inputText keep the new value without persisting it to backend?
provide the XHTML page where your inputText component is situated. My best guess to solve your problem is by adding the p:ajax component inside the inputText component. p:ajax as defined below triggers on the default event which is change and processes #this which is the inputText component. this way it saves your input on the backing bean as soon as you exit the field.
<p:inputText value="#{bean.value}" >
<p:ajax />
</p:inputText>
Related
does anybody know how to use RequestScoped bean together with rendered attribute in jsf? The rendered attribute is evaluated before applyValues phase and therefore is not correctly evaluated. I don't want to preserve any state. The example could be an outputPanel with a datatable and a button. The datatable gets a list of values. The wrapping outputPanel has the rendered attribute like:
<p:outputPanel rendered="#{not empty requestScopedBean.dataList}">
<p:datatable value="#{requestScopedBean.dataList}">
...
</p:datatable>
<p:commandButton action="#{requestScopedBean.someAction}" />
</p:outputPanel>
After loading the page and clicking on the button, nothing happens, because the view is restored and expressions are evaluated - the bean does have an empty datalist and therefore the panel should not be rendered. This causes that the action method is not even called - because the button doesn't exist.
If you're not interested in having a filled data table at that moment, just add an extra check in rendered attribute if the command button of interest has been invoked. You can do that by checking the presence of button's client ID in request parameter map.
<p:outputPanel rendered="#{not empty requestScopedBean.dataList or not empty param[someButton.clientId]}">
...
<p:commandButton binding="#{someButton}" ... />
</p:outputPanel>
See also:
How to let validation depend on the pressed button?
i wanted to know if theres a way how to hide a commandbutton to the end users when he deselects all items in the selectCheckboxMenu.
thanks for every comments and suggestions.
Just let the rendered attribute of the command button check if the very same property behind the value attribute of select checkbox menu does not represent an empty collection. You can re-execute this check by updating a persistent parent component of the button using <p:ajax> on change of the select checkbox menu.
So, in a nutshell:
<p:selectCheckboxMenu value="#{bean.selectedItems}">
<f:selectItems value="#{bean.availableItems}" />
<p:ajax update="button" />
</p:selectCheckboxMenu>
<h:panelGroup id="button">
<p:commandButton value="Submit" rendered="#{not empty bean.selectedItems}" />
</h:panelGroup>
No need for unnecessary code such as additional bean properties or listener methods specifically for value change and rendered attribute or ugly hacks such as valueChangeListener as mentioned by the other answer whose answerer is apparently having JSF 1.x in mind.
For command button set rendered attribute for ex
In managed bean create a boolean variable allCheckBoxNotSelected with getters and setters
For checkboxes in valueChangeListener attribute call a managed bean method which will check current values for all check box. If it is not selected then put false to allCheckBoxNotSelected variable and then upadate command button through its id.
I currently have a giant ui:repeat. Within this ui:repeat, some of the repeated objects have a url to a popup image associated with them. When someone clicks display under that particular object, I need the url to popup in a p:dialog.
<ui:repeat var="thing" value="#{bean.thingList}">
<p:commandLink value="details" onclick="miniImage.show();"
update=":#{p:component('chart')}"
action="#{bean.setCurrentImg(thing.imageUrl)}"
rendered="#{thing.includeImage}">
</p:commandLink>
</ui:repeat>
and at the bottom of the page:
<p:dialog id="chart" widgetVar="miniImage" >
<h:graphicImage value="#{bean.currentImg}"/>
</p:dialog>
And in the backing bean I tried using a simple setter and getter for currentImg.
I am a bit confused on this now and would like to accomplish this without having to submit the entire form as well. Any help is greatly appreciated.
If you're using PrimeFaces 3.3 or newer, you could just add partialSubmit="true" to the command component. You can then control the to-be-processed components in process attribute. In this particular case, just the current component (the command component itself) is sufficient, thus so process="#this":
<p:commandLink ... process="#this" partialSubmit="true" />
This way only the request parameters which are really necessary for the process will be sent.
Unrelated to the concrete problem, I suggest to use oncomplete instead of onclick to open the dialog. Otherwise the dialog is opened before update takes place and may cause poor user experience as the enduser would see the image instantly changing.
I don't know how to implement onclick event on a combobox, my boss want me to do is once the user click a value in the combobox it automatically search and display all the value of the selected/click item. First question is it possible to have an onclick event on a JSF page without using any javascript/jquery? Right now I'm using ADF for designing the interface. Second question how can I implements this onclick event on my combobox?
There are a couple of ways to achieve this:
Use a valueChangeListener and execute your query when it fires.
Set autoSubmit="true" and when the bound value changes, execute your query.
Only selecting a value in a dropdown won't submit your form. This is not about JSF but HTML .. so without any JS i think it's not possible.
I do not know anything about ADF in special but in plain JSF you just have to add an ajax-event to your dropdown (e.g. in primefaces)
<h:form id="id1">
<p:selectOneMenu id="id2" value="#{myBean.value}"
immediate="true" editable="true" >
<f:ajax execute="#this" listener="#{myBean.doSomeAction}" />
<f:converter converterId="myConverter" />
<f:selectItems value="#{myBean.availableOptions}" />
</p:selectOneMenu>
</h:form>
So, let me show us my troubles :)
1 - When i click on a commandbutton
<h:commandButton value="Somethings">
<f:setPropertyActionListener target="#{bean.method}" value="some" />
<f:ajax render="rendering"/>
</h:commandButton>
I dont do any action to the commandButton. Just i fire the ajax call. If i add an action on the button (like action="bean.myAction) it will be executedat the 5° phase of the JSF lifecycle (allright, only if i write event="action" in the f:ajax, but thats as default). Right? But the f:ajax is fired by cliccing on the button as default? Because for a ListBox for example, it's fired only if i write event="change" (the same, i shouldnt write it, because is as default).
2 - When i click on image
<h:graphicImage value="img/img.png" alt="img">
<f:setPropertyActionListener target="#{bean.method}" value="some" />
<f:ajax event="onclick" render="rendering"/>
</h:graphicImage>
This doesnt work. Why?
As usual, thanks for the help!!!!
1 - When i click on a commandbutton
I dont do any action to the commandButton. Just i fire the ajax call. If i add an action on the button (like action="bean.myAction) it will be executedat the 5° phase of the JSF lifecycle
The f:setPropertyActionListener will be executed in the 5th phase as well.
(allright, only if i write event="action" in the f:ajax, but thats as default). Right? But the f:ajax is fired by cliccing on the button as default? Because for a ListBox for example, it's fired only if i write event="change" (the same, i shouldnt write it, because is as default).
The f:ajax just changes the behaviour from a synchronous submit to asynchronous (partial) submit. It does that by generating some additional JavaScript code to the desired event attribute of the parent component (e.g. onclick, onchange, etc, look in generated HTML output in webbrowser). It doesn't change anything in the JSF lifecycle. Only the rendered response will be a partial response which is exactly the part which is to be updated in the component(s) with ID as definied in render attribute.
2 - When i click on image
This doesnt work. Why?
Because the h:graphicImage does not support f:setPropertyActionListener at all. It only works in UICommand components.
You want to wrap it in a h:commandLink instead.
<h:commandLink>
<f:setPropertyActionListener target="#{bean.method}" value="some" />
<f:ajax event="action" render="rendering"/>
<h:graphicImage value="img/img.png" alt="img"/>
</h:commandLink>
(and if necessary style the border/underline caused by generated <a> element away with CSS)