Adds CellTable's Model support to a FlexTable (Google Web Toolkit)

Example.java

package com.github.neothemachine.flextable.client;

import com.github.neothemachine.flextable.client.ModelFlexTable.FlexColumn;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.InlineHTML;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Widget;

public class Example extends Composite {

	public class Model {
		private final String name;
		private final String color;

		public Model(String name, String color) {
			this.name = name;
			this.color = color;
		}

		public String getName() {
			return name;
		}

		public String getColor() {
			return color;
		}
	}

	interface ExampleUiBinder extends UiBinder<Widget, Example> {
	}

	private static ExampleUiBinder uiBinder = GWT.create(ExampleUiBinder.class);
	    
	@UiField
	ModelFlexTable<Model> table;
	
	public Example() {
		initWidget(uiBinder.createAndBindUi(this));
		
		table.addColumn(new FlexColumn<Example.Model>() {
			@Override
			public Widget createWidget(Model row) {
				return new Label(row.getName());
			}
		}, "Name");
						
		table.addColumn(new FlexColumn<Example.Model>() {
			@Override
			public Widget createWidget(Model row) {
				return new InlineHTML("<div style='background-color:" + row.getColor() + "; width:50px;height:50px'></div>");
			}
		}, "Color");
		
		table.addColumn(new FlexColumn<Example.Model>() {
			@Override
			public Widget createWidget(final Model row) {
				Button remove = new Button("Remove");
				remove.addClickHandler(new ClickHandler() {
					@Override
					public void onClick(ClickEvent event) {
						table.removeRow(row);
					}
				});
				return remove;
			}
		});
		
		table.addRow(new Model("red", "#ff0000"));
		table.addRow(new Model("green", "#00ff00"));
	}

}

Example.ui.xml

<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
<ui:UiBinder xmlns:ui="urn:ui:com.google.gwt.uibinder"
    xmlns:g="urn:import:com.google.gwt.user.client.ui" 
    xmlns:flex="urn:import:com.github.neothemachine.flextable.client">

    <g:HTMLPanel>
        <flex:ModelFlexTable ui:field="table" />
    </g:HTMLPanel>
    
</ui:UiBinder>

ModelFlexTable.java

package com.github.neothemachine.flextable.client;

import java.util.LinkedList;
import java.util.List;

import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.Widget;

public class ModelFlexTable<T> extends Composite {

	public interface FlexColumn<T> {
		Widget createWidget(T row);
	}

	private final FlexTable table;	
	private final List<FlexColumn<T>> columns = new LinkedList<FlexColumn<T>>();	
	private final List<T> rows = new LinkedList<T>();
	
	public ModelFlexTable() {
		table = new FlexTable();
		initWidget(table);
	}
	
	public void addColumn(FlexColumn<T> column) {
		addColumn(column, "");
	}
	
	public void addColumn(FlexColumn<T> column, String name) {
		columns.add(column);
		if (!"".equals(name)) {
			table.setText(0, columns.size()-1, name);
		}
		recreateRows();
	}
	
	public void addRow(T row) {
		rows.add(row);
		appendRowToTable(row);
	}
	
	public void removeRow(T row) {
		int idx = rows.indexOf(row);
		if (idx == -1) {
			return;
		}
		table.removeRow(idx+1);
		rows.remove(row);
	}
	
	public void setRows(List<T> rows) {
		this.rows.clear();
		this.rows.addAll(rows);
		recreateRows();
	}
	
	private void recreateRows() {
		int rowCount = table.getRowCount();
		for (int row = rowCount-1; row > 0; row--) {
			table.removeRow(row);
		}
		for (T row : rows) {
			appendRowToTable(row);
		}
	}

	private void appendRowToTable(T row) {
		int rowIdx = table.getRowCount();
		int columnIdx = 0;
		for (FlexColumn<T> column : columns) {
			Widget widget = column.createWidget(row);
			table.setWidget(rowIdx, columnIdx, widget);
			columnIdx++;
		}
	}
	
}