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https://jira.jboss.org/browse/RF-8270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anton Belevich updated RF-8270:
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Fix Version/s: Future_4.X
(was: 4.0.0.Milestone1)
> 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/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
> Assignee: Anton Belevich
> Fix For: Future_4.X
>
>
> 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}" .../>
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