Set language label programmatically

Question

I have problems setting labels with language specifications programmatically after the component has been rendered. I have the following:

public class DateFilterWidget extends Div implements IdSpace {
private static final long serialVersionUID = 1L;

@Wire
Datebox startDate, endDate;

@Wire
Button filterButton;

@Wire
Label datefilterLabel;

String field;

public DateFilterWidget(String name, String filterField) {
    Executions.createComponents("widgets/datefilter.zul", this, null);
    Selectors.wireComponents(this, this, false);
    Selectors.wireEventListeners(this, this);
    datefilterLabel.setValue("${labels.data.dateFilterButton.label}");

    this.field = filterField;
}
}

And the datefilter.zul

<hbox sclass="filterWidgetBox" align="center">
        <label id="datefilterLabel" />
        <datebox id="startDate" format="yyyy-MM-dd" 
            weekOfYear="true" width="105px"/>
        <label value="-" />
        <datebox id="endDate" format="yyyy-MM-dd" 
            weekOfYear="true" width="105px"/>
        <button id="filterButtonc"
            label="${labels.data.dateFilterButton.label}" />
</hbox>

I the above case the same label has been used for both the button and the label. The button language reference works fine, but the label that got a value programmatically don't work.

I know that I can use the Labels.getLabel("data.dateFilterButton.label"), but this solution removes the possibility to update language unless the whole application is rerendered with the new language.

Answer 1

label="${labels...}" is a static EL and will only get evaluated once the zul file is parsed, and has the same effect as calling setLabel(Labels.get(Labels.getLabel(...))).

The button language reference works fine

I don't really understand what you mean by that. When I run your example using Labels.getLabel(...) it works as expected, setting both labels in the current locale. When changing the locale during runtime e.g. from EN -> DE none of the labels update automatically, and both components need to be re-rendered and then update correctly.

To provide a solution, can you please give details on what you expect to happen? Or what you are trying to achieve regarding:

this solution removes the possibility to update language unless the whole application is re-rendered with the new language

"Update" can have several meanings, it's just not clear yet.

Robert