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POGWT: adding Image with handler to Table Header
 

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    <p>I've got some problems with CellTable in GWT.</p> <p>What I want to do: I've got CellTable and I want to add header with an image and add action to it. But it doesn't work in my code.</p> <p>My code (all):</p> <pre><code>import java.util.Arrays; import java.util.List; import com.google.gwt.cell.client.Cell; import com.google.gwt.cell.client.ClickableTextCell; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.safehtml.shared.SafeHtmlUtils; import com.google.gwt.user.cellview.client.CellTable; import com.google.gwt.user.cellview.client.Header; import com.google.gwt.user.cellview.client.TextColumn; import com.google.gwt.user.client.ui.Image; import com.google.gwt.user.client.ui.RootPanel; import com.google.gwt.user.client.ui.VerticalPanel;` public class HelloGWT implements EntryPoint { public void onModuleLoad() { RootPanel.get().add(new MyTable()); } } class Contact { public Contact(String name, int number) { this.number = number; this.name = name; } public String name; public int number; } class MyTable extends VerticalPanel { public List&lt;Contact&gt; list = Arrays.asList(new Contact("contact_1", 1), new Contact("contact_2", 2), new Contact("contact_3", 3) ); public MyTable() { CellTable&lt;Contact&gt; table = new CellTable&lt;Contact&gt;(); table.addColumn(new MyColumn(), new MyHeader(new ClickableTextCell(), "MyHeader!")); table.setRowData(0, list); this.add(table); } } class MyColumn extends TextColumn&lt;Contact&gt; { public MyColumn() { } @Override public String getValue(Contact object) { // TODO Auto-generated method stub return object.name; } } class MyHeader extends Header&lt;String&gt; { private String columnName; private Image image = new Image("http://www.google.com/mobile/images/mgc3/google-mobile-app48.png"); public MyHeader(Cell&lt;String&gt; cell, String columnName) { super(cell); // TODO Auto-generated constructor stub this.columnName = columnName; image.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { System.out.println("Click!"); } } ); } @Override public String getValue() { // TODO Auto-generated method stub return columnName; } @Override public void render(Cell.Context context, SafeHtmlBuilder sb) { StringBuilder s = new StringBuilder(); s.append(columnName); image.setSize("20px", "20px"); s.append(image); sb.append(SafeHtmlUtils.fromSafeConstant(s.toString())); } } </code></pre> <p>Thanks for any ideas...</p>
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