Page Comparison

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1. Create your widget classes using the templates below.
2. Write a test for your Presenter if you write business logic into it.
3. In the PortalGinModule class, force your ViewImpl to be a Singleton and bind the ViewImpl to its View

   1. Code Block
      //DatasetEditor bind(DatasetEditorViewImpl.class).in(Singleton.class); bind(DatasetEditorView.class).to(DatasetEditorViewImpl.class);

4. Inject the Presenter class into the class that you're using. This automatically injects the ViewImpl into the presenter, and you have a fully ready object. When you want to add this to a UiBinder class, simply add it to a SimplePanel

   1. Code Block
      language xml title In your UiBinder (ui.xml) file
      <g:SimplePanel ui:field="editorPanel" />

   2. Code Block
      language java title In your ViewImpl class
      @UiField SimplePanel adminPanel; @Inject public SomeViewImpl(..., DatasetEditor datasetEditor) { adminPanel.add(datasetEditor); }

Widget MVP Templates

Presenter

The presenter stores the business logic. This is where your widget would, say, make calls to a remote service. Often the Presenter will also have several pass through methods for the view like "setTitle(...)".

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The ViewImpl implements its view and extends LayoutContainer. LayoutContainer is Ext GWT's base container (widget) class. You should generally instantiate view objects in the constructor, and add the main content-containing element for this view in the onRender(...) method with a simple add(myContent) call.

package org.sagebionetworks.web.client.widget.editpanels;

import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.Widget;
import com.google.inject.Inject;

public class DatasetEditorViewImpl extends LayoutContainer implements DatasetEditorView {

	private Presenter presenter;

	@Inject
	public DatasetEditorViewImpl() {
	}

	@Override
	protected void onRender(Element parent, int pos) {
		super.onRender(parent, pos);
	}

	@Override
	public Widget asWidget() {
		return this;
	}


	@Override
	public void setPresenter(Presenter presenter) {
		this.presenter = presenter;
	}

}