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.
Related
I'm using primefaces to implement my web site and I'm facing an issue.
I've used selectOneButton component and depending on which button is selected I want to show a specific datatable. So when I click the button1 I want to show table1, and table2 when I click the button2.
This is the code I am using:
<p:selectOneButton
value="#{myBean.dataTableType}"
valueChangeListener="#{myBean.dataTableTypeChange}">
<f:selectItems value="#{myBean.dataTableTypes}"
var="type"
itemLabel="#{msg['datatable.type.'.concat(type)]}"
itemValue="#{type}" />
<p:ajax update="table1 table2"/>
</p:selectOneButton>
With this code, I'm unable to reach what I want :(
I think you can very well look at the following example and keep a render flag for your tables in the listener invoked in the bean.
https://stackoverflow.com/a/8409360/3403415
Hope it helps!!
You should declare an attribute process for ajax with value #this. This attribute say to selectOneButton to set value into bean when will happen some event for selectOneButtton. And you will have an actual value for datatable type.
Now you don't have it. And if you have a condition for example:
<ui:fragment rendered="#{myBean.dataTableType eq FirstTable}">
<p:datatable id="first_table">
...
</p:datatable>
</ui:framgent>
Condition return false..
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>
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>
I would like to achieve this functionality.
<p:column>
<p:commandLink value="prihlasit" oncomplete="dlg.show();"
action="#{signForProjectBean.setProjectForDetail(item)}" />
</p:column>
I think is pretty clear what I am trying to do, I would like to display detail of the row in dataTable on which user have clicked. So my approach is to set property of current row to bean and then show the detail in dialog. But it is not working and I am feeling that I am doing something really wrong:-)
If the dialog component is supposed to display the selected item, then you need to ajax-udpate the dialog's content before opening it. Otherwise it will still display the old content as it was when the page is rendered for the first time.
<p:commandLink value="prihlasit" update=":dlg" oncomplete="dlg.show();"
action="#{signForProjectBean.setProjectForDetail(item)}" />
...
<p:dialog id="dlg" ...>
I have a JSF page on which I want to have a checkbox that, when clicked, will add/remove certain other form fields from the page. Here is the (simplified) code I currently have for the checkbox:
<h:selectBooleanCheckbox title="showComponentToReRender" value="#{backingBean.showComponentToReRender}">
<a4j:support event="onsubmit" reRender="componentToReRender" />
</h:selectBooleanCheckbox>
Here is the code for the component I want to hide:
<h:selectOneMenu id="componentToReRender" value="#{backingBean.value}" rendered="#{valuesList.rowCount>1 && backingBean.showComponentToReRender}">
<s:selectItems value="#{valuesList}" var="value"/>
</h:selectOneMenu>
Currently, clicking the checkbox does nothing; that "selectOneMenu" will not go away. What am I doing wrong?
You need to wrap the componentToReRender in either:
<h:panelGroup id="componentToReRenderWrapper">
or
<a4j:outputPanel id="componentToReRenderWrapper">
So, effectively you will have:
<h:panelGroup id="componentToReRenderWrapper">
<h:selectOneMenu id="componentToReRender" value="#{backingBean.value}" rendered="#{valuesList.rowCount>1 && backingBean.showComponentToReRender}">
<s:selectItems value="#{valuesList}" var="value"/>
</h:selectOneMenu>
</h:panelGroup>
and change the reRender="componentToReRenderWrapper" in case you use panelGroup, or remove that attribute, in case you use outputPanel.
Found the exact explanation in the RichFaces docs:
Most common problem with using reRender is pointing it to the component that has a "rendered" attribute. Note, that JSF does not mark the place in the browser DOM where the outcome of the component should be placed in case the "rendered" condition returns false. Therefore, after the component becomes rendered during the Ajax request, RichFaces delivers the rendered code to the client, but does not update a page, because the place for update is unknown. You need to point to one of the parent components that has no "rendered" attribute. As an alternative, you can wrap the component with layout="none" .
Don't forget to set ajaxRendered="true" on the a4j:outputPanel