Java tutorial
/** * @author Nigel Cook * * (C) Copyright 2010-2012. Nigel Cook. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * Licensed under the terms described in LICENSE file that accompanied this code, (the "License"); you may not use this file * except in compliance with the License. * * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. */ package n3phele.client.view; import n3phele.client.N3phele; import n3phele.client.model.User; import n3phele.client.presenter.UserActivity; import n3phele.client.widgets.MenuItem; import n3phele.client.widgets.ValidInputIndicatorWidget; import n3phele.client.widgets.WorkspaceVerticalPanel; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.dom.client.ChangeHandler; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.dom.client.KeyUpEvent; import com.google.gwt.event.dom.client.KeyUpHandler; import com.google.gwt.user.client.ui.FlexTable; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.TextBox; import com.google.gwt.user.client.ui.PasswordTextBox; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.HasHorizontalAlignment; import com.google.gwt.user.client.ui.HasVerticalAlignment; public class UserView extends WorkspaceVerticalPanel { final private FlexTable table; private User user; private TextBox email; private TextBox firstName; private TextBox lastName; private PasswordTextBox password; private PasswordTextBox confirmPassword; private Button cancel; private Button save; private UserActivity presenter; private ValidInputIndicatorWidget emailValid; private ValidInputIndicatorWidget firstNameValid; private ValidInputIndicatorWidget lastNameValid; private ValidInputIndicatorWidget passwordTextSupplied; private ValidInputIndicatorWidget passwordConfirmSupplied; private ValidInputIndicatorWidget errorsOnPage; public UserView() { super(new MenuItem(N3phele.n3pheleResource.profileIcon(), "User Profile", null)); table = new FlexTable(); table.setCellPadding(10); ChangeHandler update = new ChangeHandler() { @Override public void onChange(ChangeEvent event) { validateUser(true); } }; KeyUpHandler keyup = new KeyUpHandler() { @Override public void onKeyUp(KeyUpEvent event) { validateUser(true); } }; this.user = null; Label lblNewLabel = new Label("Email"); table.setWidget(0, 0, lblNewLabel); emailValid = new ValidInputIndicatorWidget("Email address required", false); table.setWidget(0, 1, emailValid); email = new TextBox(); email.setVisibleLength(30); email.addChangeHandler(update); email.addKeyUpHandler(keyup); table.setWidget(0, 2, email); Label lblNewLabel_1 = new Label("First Name"); table.setWidget(1, 0, lblNewLabel_1); firstNameValid = new ValidInputIndicatorWidget("Text value required", false); table.setWidget(1, 1, firstNameValid); firstName = new TextBox(); firstName.setVisibleLength(30); firstName.addChangeHandler(update); firstName.addKeyUpHandler(keyup); table.setWidget(1, 2, firstName); Label lblNewLabel_2 = new Label("Last Name"); table.setWidget(2, 0, lblNewLabel_2); lastNameValid = new ValidInputIndicatorWidget("Text value required", false); table.setWidget(2, 1, lastNameValid); lastName = new TextBox(); lastName.setVisibleLength(30); lastName.addChangeHandler(update); lastName.addKeyUpHandler(keyup); table.setWidget(2, 2, lastName); Label lblNewLabel_3 = new Label("New password"); table.setWidget(3, 0, lblNewLabel_3); passwordTextSupplied = new ValidInputIndicatorWidget("Password text required", false); table.setWidget(3, 1, passwordTextSupplied); password = new PasswordTextBox(); password.setVisibleLength(30); password.addChangeHandler(update); password.addKeyUpHandler(keyup); table.setWidget(3, 2, password); Label lblNewLabel_4 = new Label("Confirm Password"); table.setWidget(4, 0, lblNewLabel_4); passwordConfirmSupplied = new ValidInputIndicatorWidget("Matching password text required", false); table.setWidget(4, 1, passwordConfirmSupplied); confirmPassword = new PasswordTextBox(); confirmPassword.setVisibleLength(30); confirmPassword.addChangeHandler(update); confirmPassword.addKeyUpHandler(keyup); table.setWidget(4, 2, confirmPassword); cancel = new Button("cancel", new ClickHandler() { public void onClick(ClickEvent event) { do_cancel(); } }); table.setWidget(5, 3, cancel); save = new Button("save", new ClickHandler() { public void onClick(ClickEvent event) { do_save(); } }); table.setWidget(5, 2, save); errorsOnPage = new ValidInputIndicatorWidget( "check for missing or invalid parameters marked with this icon", false); table.setWidget(5, 1, errorsOnPage); table.getFlexCellFormatter().setHorizontalAlignment(5, 3, HasHorizontalAlignment.ALIGN_RIGHT); for (int i = 0; i < 5; i++) { table.getFlexCellFormatter().setColSpan(i, 2, 3); table.getFlexCellFormatter().setVerticalAlignment(i, 0, HasVerticalAlignment.ALIGN_MIDDLE); table.getFlexCellFormatter().setHorizontalAlignment(i, 0, HasHorizontalAlignment.ALIGN_RIGHT); table.getFlexCellFormatter().setVerticalAlignment(i, 2, HasVerticalAlignment.ALIGN_MIDDLE); table.getFlexCellFormatter().setHorizontalAlignment(i, 2, HasHorizontalAlignment.ALIGN_LEFT); } table.getColumnFormatter().setWidth(1, "18px"); table.getColumnFormatter().setWidth(4, "16px"); table.setCellPadding(1); table.setCellSpacing(5); this.add(table); } public void do_save() { this.presenter.onSave(user, email.getText(), firstName.getText().trim(), lastName.getText().trim(), password.getText().trim()); } public void do_cancel() { //setData(null); this.presenter.goToPrevious(); } public void setData(User user) { this.user = user; if (user != null) { email.setText(user.getName()); firstName.setText(user.getFirstName()); lastName.setText(user.getLastName()); validateUser(true); } else { email.setText(""); firstName.setText(""); lastName.setText(""); password.setText(""); confirmPassword.setText(""); validateUser(false); } } public void setPresenter(UserActivity presenter) { this.presenter = presenter; } public void refresh(User newUser) { } private boolean validateUser(boolean isValid) { boolean gotEmail = (email.getText().equals("root") || email.getText().matches("^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,4}$")); this.emailValid.setVisible(!gotEmail); boolean gotFirstName = firstName.getText() != null && firstName.getText().length() != 0; this.firstNameValid.setVisible(!gotFirstName); boolean gotLastName = lastName.getText() != null && lastName.getText().length() != 0; this.lastNameValid.setVisible(!gotLastName); isValid = isValid && gotEmail && gotFirstName && gotLastName; boolean gotPassword = password.getText() != null && password.getText().length() != 0; boolean gotConfirm = confirmPassword.getText() != null && confirmPassword.getText().length() != 0; if (user.getUri() == null || user.getUri().length() == 0) { this.passwordTextSupplied.setVisible(!gotPassword); this.passwordConfirmSupplied .setVisible(!(gotConfirm && password.getText().equals(confirmPassword.getText()))); isValid = isValid && gotPassword && gotConfirm && password.getText().equals(confirmPassword.getText()); } else { if (gotPassword || gotConfirm) { this.passwordTextSupplied.setVisible(!gotPassword); this.passwordConfirmSupplied .setVisible(!(gotConfirm && password.getText().equals(confirmPassword.getText()))); isValid = isValid && gotPassword && gotConfirm && password.getText().equals(confirmPassword.getText()); } else { this.passwordTextSupplied.setVisible(false); this.passwordConfirmSupplied.setVisible(false); } } this.errorsOnPage.setVisible(!isValid); this.save.setEnabled(isValid); return isValid; } }