3.5.5.2.9. OpenAction

OpenAction is a picker field action designed to open an editor screen for the entity currently selected in the picker field.

The action is implemented by com.haulmont.cuba.gui.actions.picker.OpenAction class and should be defined in XML using type="picker_open" action’s attribute. You can configure common action parameters using XML attributes of the action element, see Declarative Actions for details. Below we describe parameters specific to the OpenAction class.

The following parameters can be set both in XML and in Java:

  • openMode - the editor screen opening mode as a value of the OpenMode enum: NEW_TAB, DIALOG, etc. By default, OpenAction opens the editor in THIS_TAB mode.

  • screenId - string id of the editor screen to use. By default, OpenAction uses either a screen, annotated with @PrimaryEditorScreen, or having identifier in the format of <entity_name>.edit, e.g. demo_Customer.edit.

  • screenClass - Java class of the editor screen controller to use. It has higher priority than screenId.

For example, if you want to open a specific editor screen as a dialog, you can configure the action in XML:

<action id="open" type="picker_open">
    <properties>
        <property name="openMode" value="DIALOG"/>
        <property name="screenClass" value="com.company.sales.web.customer.CustomerEdit"/>
    </properties>
</action>

Alternatively, you can inject the action into the screen controller and configure it using setters:

@Named("customerField.open")
private OpenAction customerFieldOpen;

@Subscribe
public void onInit(InitEvent event) {
    customerFieldOpen.setOpenMode(OpenMode.DIALOG);
    customerFieldOpen.setScreenClass(CustomerEdit.class);
}

Now let’s consider parameters that can be configured only in Java code. In order to generate correctly annotated method stubs for these parameters, use Handlers tab of the Component Inspector tool window in Studio.

  • screenOptionsSupplier - a handler that returns ScreenOptions object to be passed to the opened editor screen. For example:

    @Install(to = "customerField.open", subject = "screenOptionsSupplier")
private ScreenOptions customerFieldOpenScreenOptionsSupplier() {
    return new MapScreenOptions(ParamsMap.of("someParameter", 10));
}

    The returned ScreenOptions object will be available in the InitEvent of the opened screen.

  • screenConfigurer - a handler that accepts the editor screen and can initialize it before opening. For example:

    @Install(to = "customerField.open", subject = "screenConfigurer")
private void customerFieldOpenScreenConfigurer(Screen screen) {
    ((CustomerEdit) screen).setSomeParameter(10);
}

    Note that screen configurer comes into play when the screen is already initialized but not yet shown, i.e. after its InitEvent and AfterInitEvent and before BeforeShowEvent are sent.

  • afterCloseHandler - a handler that is invoked after the editor screen is closed. AfterCloseEvent is passed to the handler. For example:

    @Install(to = "customerField.open", subject = "afterCloseHandler")
private void customerFieldOpenAfterCloseHandler(AfterCloseEvent event) {
    System.out.println("Closed with " + event.getCloseAction());
}

If you want to perform some checks or interact with the user before the action is executed, subscribe to the action’s ActionPerformedEvent and invoke execute() method of the action when needed. The action will be invoked with all parameters that you defined for it. In the example below, we show a confirmation dialog before executing the action:

@Named("customerField.open")
private OpenAction customerFieldOpen;

@Subscribe("customerField.open")
public void onCustomerFieldOpen(Action.ActionPerformedEvent event) {
    dialogs.createOptionDialog()
            .withCaption("Please confirm")
            .withMessage("Do you really want to open the customer?")
            .withActions(
                    new DialogAction(DialogAction.Type.YES)
                            .withHandler(e -> customerFieldOpen.execute()), // execute action
                    new DialogAction(DialogAction.Type.NO)
            )
            .show();
}

You can also subscribe to ActionPerformedEvent and instead of invoking the action’s execute() method, use ScreenBuilders API directly to open the edit screen. In this case, you are ignoring all specific action parameters and behavior and using only its common parameters like caption, icon, etc. For example:

@Inject
private ScreenBuilders screenBuilders;
@Inject
private LookupPickerField<Customer> customerField;

@Subscribe("customerField.open")
public void onCustomerFieldOpen(Action.ActionPerformedEvent event) {
    screenBuilders.editor(customerField)
            .withOpenMode(OpenMode.DIALOG)
            .withScreenClass(CustomerEdit.class)
            .build()
            .show();
}