provide a way to render a commandButton based on a minimum and/or maximum
number of rows currently selected in a rich:*dataTable
--------------------------------------------------------------------------------------------------------------------------------
Key: RF-8270
URL: https://jira.jboss.org/jira/browse/RF-8270
Project: RichFaces
Issue Type: Feature Request
Security Level: Public (Everyone can see)
Components: component-tables
Affects Versions: 3.3.2.SR1
Reporter: Ian Springer
This is useful when a particular action only makes sense when a certain number
of rows are selected - here are a few examples:
1) most CRUD actions only make sense when at least one row is selected
2) a diff/compare action would only make sense when at least two rows were
selected
For RHQ, we currently have a custom component for this but would prefer use
something that was built-in to RichFaces. Here's what the usage of our
component (onc:selectCommandButton) looks like (not the low and high
attributes, which reflect the minimum and maximum rows that must be selected:
<f:facet name="footer">
<rich:columnGroup>
<rich:column colspan="4" width="100%">
<onc:selectCommandButton
action="#{ResourceGroupOperationScheduleUIBean.unschedule}"
value="UNSCHEDULE"
target="selectedItems"
styleClass="on-pager-button
buttonsmall"
low="1"
rendered="#{ResourceGroupUIBean.permissions.control}"/>
<onc:selectCommandButton
action="#{ResourceGroupOperationScheduleUIBean.executeNow}"
value="EXECUTE NOW"
target="selectedItems"
styleClass="on-pager-button
buttonsmall"
low="1" high="1"
rendered="#{ResourceGroupUIBean.permissions.control}"/>
</rich:column>
</rich:columnGroup>
</f:facet>
However, I think a nicer way to implement this would be to add a new optional
attribute to the rich:*dataTable components, e.g.:
<rich:extendedDataTable selectedRowCount="#{MyManagedBean.selectedRowCount}"
... />
The extendedDataTable component would update this attribute any time the
selection is changed by the GUI user. Then a standard commandButton could be
used as follows:
<h:commandButton value="MyAction" rendered="#{MyManagedBean.selectedRowCount eq
1}" .../>
An alternative to a new 'selectedRowCount' attribute would be using the
existing 'selection' attribute and adding a new getSelectedRowCount() method to
the org.richfaces.model.selection.Selection interface that the 'selection'
attribute updates. An example of what this option would look like:
<rich:extendedDataTable selection="#{MyManagedBean.selection}" ... />
<h:commandButton value="MyAction"
rendered="#{MyManagedBean.selection.selectedRowCount eq 1}" .../>
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
https://jira.jboss.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
_______________________________________________
richfaces-issues mailing list
[email protected]
https://lists.jboss.org/mailman/listinfo/richfaces-issues
