GWT Custom header with a TextBox (TextInputCell) in my CellTable -> How to override onBrowserEvent? - gwt

Question

I would like to use a custom header with a TextBox (TextInputCell) in my CellTable.
I found this example and tried to adapt it:
GWT 2: how can I add Button to the CellTable's header?
public static class BtnHeader extends Header<String>{
public BtnHeader(ButtonCell cell) {
super(cell);
}
#Override
public void onBrowserEvent(Context context, Element elem, NativeEvent nativeEvent)
{
int eventType = Event.as(nativeEvent).getTypeInt();
if (eventType == Event.ONCLICK)
{
nativeEvent.preventDefault();
updateHeader();
}
}
#Override
public String getValue() {
return "Click!";
}
protected void updateHeader() {
// TODO to redefine in a defiant class
}
}
And in your code:
tnHeader header = new BtnHeader(new ButtonCell()){
#Override
protected void updateHeader(){
// Actions when clicking button
}
cTable.addColumn(column, header);
How can I adapt this to my use case ?
I tried the following:
public class TextBoxHeader extends Header<String> {
private String myCaption;
public TextBoxHeader(TextInputCell cell, String caption) {
super(cell);
myCaption = caption;
}
#Override
public String getValue() {
// TODO Auto-generated method stub
return myCaption;
}
protected void updateHeader() {
// TODO to redefine in a defiant class
}
}
The whole part with the onBrowserEvent is missing. How to implement it ?
The documentation (http://www.gwtproject.org/javadoc/latest/com/google/gwt/cell/client/TextInputCell.html) shows that onBrowserEvent is not protected. What to do now ?
Cheers,
Tim

Answer 1

Ok I found the solution. Instead of extending Header, I used a TextInputCell and put it in the Header. I then added a ValueUpdater to the header and I could react to the changes in the input field.
TextInputCell cell = new TextInputCell("Program");
com.google.gwt.user.cellview.client.Header<String> header = new com.google.gwt.user.cellview.client.Header<String>(cell) {
#Override
public String getValue() {
// TODO Auto-generated method stub
return "";
}
};
header.setUpdater(new ValueUpdater<String>() {
#Override
public void update(String value) {
}
});
Cheers,
Tim