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POMVP: Should the View implement a Presenter's interface or vice versa?
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  1. POMVP: Should the View implement a Presenter's interface or vice versa?
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    copied!<p>I am doing my first steps with <code>GWT</code>. I have a question after reading:</p> <ul> <li><a href="http://code.google.com/webtoolkit/articles/mvp-architecture.html" rel="noreferrer">Large scale application development and MVP</a></li> <li><a href="http://code.google.com/webtoolkit/articles/mvp-architecture-2.html" rel="noreferrer">Large scale application development and MVP - Part II</a></li> </ul> <p>In the first example the <code>Presenter</code> defines the interface for the <code>View</code>.</p> <pre><code>public class ContactsPresenter implements Presenter { ... public interface Display extends HasValue&lt;List&lt;String&gt;&gt; { HasClickHandlers getAddButton(); HasClickHandlers getDeleteButton(); HasClickHandlers getList(); void setData(List&lt;String&gt; data); int getClickedRow(ClickEvent event); List&lt;Integer&gt; getSelectedRows(); Widget asWidget(); } } </code></pre> <p>And in the second one, the <code>View</code> defines the interface for the <code>Presenter</code>.</p> <pre><code>public interface ContactsView&lt;T&gt; { public interface Presenter&lt;T&gt; { void onAddButtonClicked(); void onDeleteButtonClicked(); void onItemClicked(T clickedItem); void onItemSelected(T selectedItem); } void setPresenter(Presenter&lt;T&gt; presenter); void setColumnDefinitions(List&lt;ColumnDefinition&lt;T&gt;&gt; columnDefinitions); void setRowData(List&lt;T&gt; rowData); Widget asWidget(); } </code></pre> <p>What's the idea of this difference?</p> <p>Which should I choose?</p>
 

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