Elrhino

import javax.inject.Inject;

import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.user.client.ui.Widget;
import com.gwtplatform.mvp.client.ViewImpl;

public class LauncherView extends ViewImpl implements LauncherPresenter.MyView {
    interface Binder extends UiBinder<Widget, LauncherView> {
    }

Elrhino

<ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder'
             xmlns:g='urn:import:com.google.gwt.user.client.ui'>
</ui:UiBinder>

Elrhino

<ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder'
             xmlns:g='urn:import:com.google.gwt.user.client.ui'>

    <g:HTMLPanel>
        <g:TextBox ui:field="launchCoordinates"/><br/>
        <g:TextBox ui:field="launchPower"/><br/>
        <g:Button ui:field="launchButton"/>
    </g:HTMLPanel>
</ui:UiBinder>

Elrhino

public class LauncherView extends ViewImpl implements LauncherPresenter.MyView {
    interface Binder extends UiBinder<Widget, LauncherView> {
    }

    @UiField
    TextBox launchCoordinates;
    @UiField
    TextBox launchPower;
    @UiField
    Button launchButton;

Elrhino

import com.gwtplatform.mvp.client.UiHandlers;

public interface launcherUiHandlers extends UiHandlers {
    void onLaunch();
}

Elrhino

@UiHandler("launchButton")
public void onLaunch(ClickEvent event) {
    // TODO: Send launch parameters to the LauncherPresenter.
}

Elrhino

@UiHandler("launchButton")
public void onLaunch(ClickEvent event) {
    getUiHandlers().onLaunch(launchCoordinates.getText(), launchPower.getText());
}

Elrhino

public class LauncherPresenter extends Presenter<LauncherPresenter.MyView, LauncherPresenter.MyProxy> {
    interface MyView extends View {
    }

    @ProxyStandard
    @NameToken(NameTokens.HOME)
    interface MyProxy extends ProxyPlace<LauncherPresenter> {
    }

    @Inject

Elrhino

@Override
public void onLaunch(String launchCoordinates, String launchPower) {
    // TODO: Validate values.

    // TODO: Do something with the values.
}

Elrhino

private boolean validateFields(String coordinates, String power) {
    return coordinates.matches("[0-9]{3};[0-9]{3};[0-9]{3}") && power.matches("[0-9]");
}

@Override
public void onLaunch(String coordinates, String power) {
    if (validateFields(coordinates, power)) {
        // TODO: Do something with the values. Process with service.
    }
}