Examples of com.cedarsolutions.client.gwt.event.UnifiedEvent

Package com.cedarsolutions.client.gwt.event

Examples of com.cedarsolutions.client.gwt.event.UnifiedEvent

com.cedarsolutions.client.gwt.event.UnifiedEvent
Unified event that can be handled by ViewEventHandler.
There are a variety of different events that a view might need to handle. The usual strategy is to delegate event handling back to the presenter. However, if the presenter knows exactly what kind of event to handle, this makes for a tight coupling between view and presenter. For instance, what if the view wants to change a button to a menu item? It's a different kind of event handler, so the presenter would also need to change, even if all it cares about is that the item was clicked on. That seems wrong, since the main reason to separate the view and presenter is to give us some flexibility in how to implement the UI.

This class allows the view interface to be structured in terms of a generic event handler. If the presenter is just handling the fact that an event occurred (i.e. that something was clicked), then it won't have to be reimplemented just because the UI element changed. Of course, if the presenter needs to do special handling based on the contents of the event itself, the presenter will still have to change... but in that case we haven't really lost anything.
@author Kenneth J. Pronovici

        when(presenter.getDefaultCriteria()).thenReturn(criteria);
        when(presenter.getRenderer()).thenReturn(renderer);
        when(presenter.createDataSource()).thenReturn(null);


        BackendDataInitializeHandler<String, String> handler = new BackendDataInitializeHandler<String, String>(presenter);
        UnifiedEvent event = new UnifiedEvent((UnifiedEventType) null);  // doesn't matter what contents are
        handler.handleEvent(event);


        // Criteria will be set, but nothing else happens
        verify(renderer).setSearchCriteria(criteria);
        verify(presenter, times(0)).setDataSource(isA(BackendDataSource.class));

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        IBackendDataPresenter<String, String> presenter = mock(IBackendDataPresenter.class);
        when(presenter.createDataSource()).thenReturn(dataSource);
        when(presenter.getDataSource()).thenReturn(dataSource); // for consistency


        BackendDataInitializeHandler<String, String> handler = new BackendDataInitializeHandler<String, String>(presenter);
        UnifiedEvent event = new UnifiedEvent((UnifiedEventType) null);  // doesn't matter what contents are
        handler.handleEvent(event);


        // Data source will be set, but nothing else happens
        verify(presenter).setDataSource(dataSource);
        verify(presenter, times(0)).getDefaultCriteria();

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        when(presenter.getRenderer()).thenReturn(renderer);
        when(presenter.createDataSource()).thenReturn(dataSource);
        when(presenter.getDataSource()).thenReturn(dataSource); // for consistency


        BackendDataInitializeHandler<String, String> handler = new BackendDataInitializeHandler<String, String>(presenter);
        UnifiedEvent event = new UnifiedEvent((UnifiedEventType) null);  // doesn't matter what contents are
        handler.handleEvent(event);


        // Criteria will be set first, then data source set, but no display will be configured
        InOrder order = inOrder(presenter, renderer);
        order.verify(renderer).setSearchCriteria(criteria);

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        when(presenter.getRenderer()).thenReturn(renderer);
        when(presenter.createDataSource()).thenReturn(dataSource);
        when(presenter.getDataSource()).thenReturn(dataSource); // for consistency


        BackendDataInitializeHandler<String, String> handler = new BackendDataInitializeHandler<String, String>(presenter);
        UnifiedEvent event = new UnifiedEvent((UnifiedEventType) null);  // doesn't matter what contents are
        handler.handleEvent(event);


        // Criteria will be set first, then data source and displasy will be configured
        InOrder order = inOrder(presenter, renderer, dataProvider);
        order.verify(renderer).setSearchCriteria(criteria);

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        String criteria = "criteria";
        IBackendDataPresenter<String, String> presenter = mock(IBackendDataPresenter.class);
        when(presenter.getDefaultCriteria()).thenReturn(criteria);


        BackendDataCriteriaResetHandler<String, String> handler = new BackendDataCriteriaResetHandler<String, String>(presenter);
        UnifiedEvent event = new UnifiedEvent((UnifiedEventType) null);  // doesn't matter what contents are
        handler.handleEvent(event);
    }

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        IBackendDataPresenter<String, String> presenter = mock(IBackendDataPresenter.class);
        when(presenter.getDefaultCriteria()).thenReturn(criteria);
        when(presenter.getRenderer()).thenReturn(renderer);


        BackendDataCriteriaResetHandler<String, String> handler = new BackendDataCriteriaResetHandler<String, String>(presenter);
        UnifiedEvent event = new UnifiedEvent((UnifiedEventType) null);  // doesn't matter what contents are
        handler.handleEvent(event);


        verify(renderer).setSearchCriteria(criteria);
        verify(renderer, times(1)).getRefreshEventHandler();
    }

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        IBackendDataPresenter<String, String> presenter = mock(IBackendDataPresenter.class);
        when(presenter.getDefaultCriteria()).thenReturn(criteria);
        when(presenter.getRenderer()).thenReturn(renderer);


        BackendDataCriteriaResetHandler<String, String> handler = new BackendDataCriteriaResetHandler<String, String>(presenter);
        UnifiedEvent event = new UnifiedEvent((UnifiedEventType) null);  // doesn't matter what contents are
        handler.handleEvent(event);


        verify(renderer).setSearchCriteria(criteria);
        verify(refreshHandler).handleEvent(event);
    }

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        BackendDataSource<String, String> dataSource = mock(BackendDataSource.class);
        IBackendDataPresenter<String, String> presenter = mock(IBackendDataPresenter.class);
        when(presenter.getDataSource()).thenReturn(dataSource);


        BackendDataRefreshHandler<String, String> handler = new BackendDataRefreshHandler<String, String>(presenter);
        UnifiedEvent event = new UnifiedEvent((UnifiedEventType) null);  // doesn't matter what contents are
        handler.handleEvent(event);  // just make sure it doesn't blow up
    }

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        BackendDataSource<String, String> dataSource = mock(BackendDataSource.class);
        IBackendDataPresenter<String, String> presenter = mock(IBackendDataPresenter.class);
        when(presenter.getDataSource()).thenReturn(dataSource);


        BackendDataRefreshHandler<String, String> handler = new BackendDataRefreshHandler<String, String>(presenter);
        UnifiedEvent event = new UnifiedEvent((UnifiedEventType) null);  // doesn't matter what contents are
        handler.handleEvent(event);


        verify(dataSource).clear();
    }

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    /** Select the tab, as if the normal BeforeSelectionHandler was invoked. */
    @Override
    public void selectTab() {
        if (!this.isInitialized()) {
            if (this.getInitializationEventHandler() != null) {
                UnifiedEvent init = new UnifiedEvent(UnifiedEventType.INIT_EVENT);
                this.getInitializationEventHandler().handleEvent(init);
            }


            this.markInitialized();
        }


        // The selected event handler is always called, even when initialize is also called.
        // That way, the client doesn't need any special logic for the "selected first time" case.
        if (this.getSelectedEventHandler() != null) {
            UnifiedEvent selected = new UnifiedEvent(UnifiedEventType.SELECTED_EVENT);
            this.getSelectedEventHandler().handleEvent(selected);
        }


        if (this.getHistoryToken() != null) {
            History.newItem(this.getHistoryToken(), false);

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com.cedarsolutions.client.gwt.datasource.BackendDataCriteriaResetHandlerTest

com.cedarsolutions.client.gwt.datasource.BackendDataInitializeHandlerTest

com.cedarsolutions.client.gwt.datasource.BackendRefreshHandlerTest

com.cedarsolutions.client.gwt.handler.AbstractColumnSortEventHandler

com.cedarsolutions.client.gwt.handler.AbstractViewEventClickHandler

com.cedarsolutions.client.gwt.module.view.ModuleTabView

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