次/前のボタンがクリックされ、条件付きで追加されたときにトリガーされるタグのデータ選択を確認できflowListener
ます。<p:wizard>
FacesMessage
public String onFlowProcess(FlowEvent event) {
String current = event.getOldStep();
String next = event.getNewStep();
boolean proceed = true;
if(current.equals("first") && next.equals("second") && (selectedData == null)) {
//proceed only when data was selected and user is moving to the next step
FacesMessage facesMessage = new FacesMessage("You need to make a selection in a datatable to proceed!");
FacesContext.getCurrentInstance().addMessage("form:selection", facesMessage);
proceed = false;
}
return proceed ? next : current;
}
完全な例を以下に示します。
景色:
<h:form id="form">
<p:wizard widgetVar="wiz" flowListener="#{q16439053Bean.onFlowProcess}">
<p:tab id="first" title="First">
<p:message for="selection"/>
<p:panel id="selection" header="Term page">
<p:dataTable id="collection" value="#{q16439053Bean.list}" var="data" rowKey="#{data.name}" selection="#{q16439053Bean.selectedData}">
<p:column selectionMode="single" style="width:2%" />
<p:column>
#{data.name}
</p:column>
</p:dataTable>
</p:panel>
</p:tab>
<p:tab id="second" title="Second">
Done!
</p:tab>
</p:wizard>
</h:form>
豆:
@ManagedBean
@ViewScoped
public class Q16439053Bean implements Serializable {
private List<Data> list;
private Data selectedData;
public List<Data> getList() {
return list;
}
public void setList(List<Data> list) {
this.list = list;
}
public Data getSelectedData() {
return selectedData;
}
public void setSelectedData(Data selectedData) {
this.selectedData = selectedData;
}
public class Data {
private String name;
private String value;
public Data() {
}
public Data(String name, String value) {
this.name = name;
this.value = value;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
}
public Q16439053Bean() {
list = new ArrayList<Data>();
Data d;
d = new Data("name", "value");
list.add(d);
d = new Data("name1", "value1");
list.add(d);
d = new Data("name2", "value2");
list.add(d);
d = new Data("name3", "value3");
list.add(d);
}
public String onFlowProcess(FlowEvent event) {
String current = event.getOldStep();
String next = event.getNewStep();
boolean proceed = true;
if(current.equals("first") && next.equals("second") && (selectedData == null)) {
FacesMessage facesMessage = new FacesMessage("You need to make a selection in a datatable to proceed!");
FacesContext.getCurrentInstance().addMessage("form:selection", facesMessage);
proceed = false;
}
return proceed ? next : current;
}
}