How to display form validation constraints message on GWT Material inputs using Editor and Validation Framework from Presenter's class? - validation

Question

I use:
Gwt-platform
Gwt Validation
Gwt UiEditor framework
Gwt Material inputs
After constraints validation I would like to display error messages. This is supported by gwt material inputs, like MaterialTextBox using method:  materialTextBox.setError("Please provide your name");
The problem is that it can be only executed from view class:
public class LoginView extends ViewWithUiHandlers<LoginUiHandlers> implements LoginPresenter.MyView {
interface Binder extends UiBinder<Widget, LoginView> {}
/** The driver to link the proxy bean with the view. */
public interface EditorDriver extends SimpleBeanEditorDriver<LoginModel, LoginView> { }
#UiField MaterialTextBox email;
#UiField MaterialTextBox password;
#UiField MaterialButton loginButton;
#UiField MaterialCheckBox keepMeLoggedInCheckbox;
#Inject
LoginView(Binder uiBinder) {
initWidget(uiBinder.createAndBindUi(this));
addClickHandlerToLoginButton();
}
//#UiHandler("loginButton")
private void onLoginButtonClick(ClickEvent e){
getUiHandlers().onLoginButtonClick();
}
private void addClickHandlerToLoginButton() {
loginButton.addClickHandler(new ClickHandler() {
#Override public void onClick(ClickEvent event) {
onLoginButtonClick(event);
}
});
}
#Override
public SimpleBeanEditorDriver<LoginModel, ?> createEditorDriver() {
EditorDriver driver = GWT.create(EditorDriver.class);
driver.initialize(this);
return driver;
}
public void test() {}
}
But I do all my editor/validation action in Presenter, and I do not have there any View connection I could use:
public class LoginPresenter extends Presenter<LoginPresenter.MyView, LoginPresenter.MyProxy> implements LoginUiHandlers {
public interface MyView extends BeanEditView<LoginModel>, HasUiHandlers<LoginUiHandlers> {}
public static final Type<RevealContentHandler<?>> SLOT_Login = new Type<RevealContentHandler<?>>();
#ProxyStandard
#NameToken(NameTokens.login)
public interface MyProxy extends ProxyPlace<LoginPresenter> {}
// Editor
private SimpleBeanEditorDriver<LoginModel, ?> editorDriver;
private static final LoginService service = GWT.create(LoginService.class);
private LoginModel model = new LoginModel("","");
#Override
public void onLoginButtonClick() {
if (editorDriver.isDirty()) {
model = editorDriver.flush();
validateModel();
if (editorDriver.hasErrors()) {
MaterialToast.fireToast("Errors occur");
StringBuilder errorBuilder = new StringBuilder();
for (EditorError error : editorDriver.getErrors()) {
errorBuilder.append(error.getMessage() + "\n");
}
MaterialToast.fireToast(errorBuilder.toString());
} else {
service.login(
model, new MethodCallback<Integer>() {
#Override
public void onSuccess(Method method, Integer response) {
MaterialToast.fireToast("Succefully set info. status code: " + response);
}
#Override
public void onFailure(Method method, Throwable exception) {
MaterialToast.fireToast("Error setting");
}
});
}
} else {
MaterialToast.fireToast("Data has not changed");
}
}
private void validateModel() {
Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
Set<ConstraintViolation<LoginModel>> violations = validator.validate(model);
if (violations.size() > 0) {
editorDriver.setConstraintViolations(new ArrayList<ConstraintViolation<?>>(violations));
}
}
#Inject
LoginPresenter(EventBus eventBus,MyView view, MyProxy proxy) {
super(eventBus, view, proxy, RevealType.Root);
getView().setUiHandlers(this);
editorDriver = getView().createEditorDriver();
editorDriver.edit(model);
}
}
I think that I should add an interface where I will declare methods to access inputs in view. And do implementation of that. But I don't know how. Please help me.

Answer 1

I've make it working. But really I am not quite sure what did happened that it start to work. So I will just share my working code:
Presenter
package pl.korbeldaniel.cms.client.login;
import java.util.ArrayList;
import java.util.Set;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import org.fusesource.restygwt.client.Method;
import org.fusesource.restygwt.client.MethodCallback;
import gwt.material.design.client.ui.MaterialToast;
import com.google.gwt.core.shared.GWT;
import com.google.gwt.editor.client.SimpleBeanEditorDriver;
import com.google.gwt.event.shared.GwtEvent.Type;
import com.google.inject.Inject;
import com.google.web.bindery.event.shared.EventBus;
import com.gwtplatform.mvp.client.Presenter;
import com.gwtplatform.mvp.client.annotations.ProxyStandard;
import com.gwtplatform.mvp.client.proxy.ProxyPlace;
import com.gwtplatform.mvp.client.annotations.NameToken;
import com.gwtplatform.mvp.client.proxy.RevealContentHandler;
import com.gwtplatform.mvp.client.HasUiHandlers;
import pl.korbeldaniel.cms.client.editor.BeanEditView;
import pl.korbeldaniel.cms.client.model.LoginModel;
import pl.korbeldaniel.cms.client.place.NameTokens;
import pl.korbeldaniel.cms.client.service.LoginService;
public class LoginPresenter extends Presenter<LoginPresenter.MyView, LoginPresenter.MyProxy> implements LoginUiHandlers {
#ProxyStandard
#NameToken(NameTokens.login)
public interface MyProxy extends ProxyPlace<LoginPresenter> {}
public interface MyView extends BeanEditView<LoginModel>, HasUiHandlers<LoginUiHandlers> {}
public static final Type<RevealContentHandler<?>> SLOT_Login = new Type<RevealContentHandler<?>>();
// Editor
private SimpleBeanEditorDriver<LoginModel, ?> editorDriver;
private static final LoginService service = GWT.create(LoginService.class);
private LoginModel model = new LoginModel();
#Override
public void onLoginButtonClick() {
if (editorDriver.isDirty()) {
model = editorDriver.flush();
validateModel();
if (editorDriver.hasErrors()) {
MaterialToast.fireToast("Errors occur");
} else {
service.login(
model, new MethodCallback<Integer>() {
#Override
public void onSuccess(Method method, Integer response) {
MaterialToast.fireToast("Succefully set info. status code: " + response);
}
#Override
public void onFailure(Method method, Throwable exception) {
MaterialToast.fireToast("Error setting");
}
});
}
} else {
MaterialToast.fireToast("Data has not changed");
}
}
private void validateModel() {
Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
Set<ConstraintViolation<LoginModel>> violations = validator.validate(model);
GWT.log(String.valueOf(violations.size()));
if (violations.size() > 0) {
editorDriver.setConstraintViolations(new ArrayList<ConstraintViolation<?>>(violations));
}
model.validate();
}
#Inject
LoginPresenter(EventBus eventBus,MyView view, MyProxy proxy) {
super(eventBus, view, proxy, RevealType.Root);
getView().setUiHandlers(this);
editorDriver = getView().createEditorDriver();
editorDriver.edit(model);
}
public enum EditorMode {
VIEW, EDIT, CREATE
};
}
Ui Handler
package pl.korbeldaniel.cms.client.login;
import com.gwtplatform.mvp.client.UiHandlers;
interface LoginUiHandlers extends UiHandlers {
void onLoginButtonClick();
}
ValidatorFactory
package pl.korbeldaniel.cms.client.login;
import javax.validation.Validator;
import pl.korbeldaniel.cms.client.model.LoginModel;
import com.google.gwt.core.client.GWT;
import com.google.gwt.validation.client.AbstractGwtValidatorFactory;
import com.google.gwt.validation.client.GwtValidation;
import com.google.gwt.validation.client.impl.AbstractGwtValidator;
public final class SampleValidatorFactory extends AbstractGwtValidatorFactory {
/**
* Validator marker for the Validation Sample project. Only the classes and
* groups listed in the {#link GwtValidation} annotation can be validated.
*/
#GwtValidation(LoginModel.class)
public interface GwtValidator extends Validator {
}
#Override
public AbstractGwtValidator createValidator() {
return GWT.create(GwtValidator.class);
}
}
View
package pl.korbeldaniel.cms.client.login;
import gwt.material.design.client.ui.MaterialButton;
import gwt.material.design.client.ui.MaterialCheckBox;
import gwt.material.design.client.ui.MaterialTextBox;
import javax.inject.Inject;
import pl.korbeldaniel.cms.client.model.LoginModel;
import com.google.gwt.core.client.GWT;
import com.google.gwt.editor.client.SimpleBeanEditorDriver;
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.Widget;
import com.gwtplatform.mvp.client.ViewWithUiHandlers;
public class LoginView extends ViewWithUiHandlers<LoginUiHandlers> implements LoginPresenter.MyView {
interface Binder extends UiBinder<Widget, LoginView> {}
/** The driver to link the proxy bean with the view. */
public interface EditorDriver extends SimpleBeanEditorDriver<LoginModel, LoginView> { }
#UiField MaterialTextBox email;
#UiField MaterialTextBox password;
#UiField MaterialButton loginButton;
#UiField MaterialCheckBox keepMeLoggedInCheckbox;
#Inject
LoginView(Binder uiBinder) {
initWidget(uiBinder.createAndBindUi(this));
addClickHandlerToLoginButton();
}
//#UiHandler("loginButton")
private void onLoginButtonClick(ClickEvent e){
getUiHandlers().onLoginButtonClick();
}
private void addClickHandlerToLoginButton() {
loginButton.addClickHandler(new ClickHandler() {
#Override public void onClick(ClickEvent event) {
onLoginButtonClick(event);
}
});
}
#Override
public SimpleBeanEditorDriver<LoginModel, ?> createEditorDriver() {
EditorDriver driver = GWT.create(EditorDriver.class);
driver.initialize(this);
return driver;
}
}
View Binder
<!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:m="urn:import:gwt.material.design.client.ui"
xmlns:e="urn:import:pl.korbeldaniel.cms.client.login">
<m:MaterialRow ui:field="loginWidget">
<m:MaterialColumn grid="s12 m4 l4" offset="l4 m4" >
<m:MaterialTitle title="Login" description="Please provide your account credentials."/>
<m:MaterialPanel padding="5" shadow="1" addStyleNames="{style.panel}">
<m:MaterialPanel addStyleNames="{style.fieldPanel}">
<!-- <m:MaterialImage url="http://b.vimeocdn.com/ps/339/488/3394886_300.jpg" type="CIRCLE" addStyleNames="{style.imgProfile} z-depth-1"/> -->
<m:MaterialTextBox ui:field="email" type="EMAIL" placeholder="Email"/>
<m:MaterialTextBox ui:field="password" type="PASSWORD" placeholder="Password"/>
<m:MaterialRow addStyleNames="{style.rowAction}">
<m:MaterialColumn grid="s12 m12 l6">
<m:MaterialCheckBox ui:field="keepMeLoggedInCheckbox" text="Keep me logged in"/>
</m:MaterialColumn>
</m:MaterialRow>
<m:MaterialButton ui:field="loginButton" waves="LIGHT" text="Log In" width="100%"/>
</m:MaterialPanel>
</m:MaterialPanel>
</m:MaterialColumn>
</m:MaterialRow>
</ui:UiBinder>