@Data(ProjectActivityTablePageData.class)
public class ProjectActivityTablePage extends ActivityTablePage<Table> {

    private Long projectId;

    ...

    @Override
    protected void execPageActivated() {
        if (getDetailForm() == null) {
            ProjectActivityCalendarForm form = new ProjectActivityCalendarForm();
            form.setProjectId(getProjectId());
            setDetailForm(form);
            form.startView();
        }
    }

    ...

}

@FormData(value = ProjectActivityCalendarFormData.class, sdkCommand = FormData.SdkCommand.CREATE)
public class ProjectActivityCalendarForm extends AbstractForm {

    private Long projectId;

    @FormData
    public Long getProjectId() {
        return projectId;
    }

    @FormData
    public void setProjectId(Long projectId) {
        this.projectId = projectId;
    }

    @Override
    protected int getConfiguredDisplayHint() {
        return DISPLAY_HINT_VIEW;
    }

    @Override
    protected String getConfiguredDisplayViewId() {
        return VIEW_ID_S;
    }
    @Override
    public Object computeExclusiveKey() {
        return projectId;
    }

    public void startView() {
        startInternalExclusive(new ViewHandler());
    }

    ...

    @Order(1000)
    public class MainBox extends AbstractGroupBox {
    ...
    }

    public class ViewHandler extends AbstractFormHandler {
        @Override
        protected void execLoad() {
            getOkButton().setVisibleGranted(false);
            getCancelButton().setVisibleGranted(false);
        }

        @Override
        protected boolean getConfiguredOpenExclusive() {
            return true;
        }

        @Override
        protected void execStore() {
        }
    }
}