Java tutorial
/* * ################################################################ * * ProActive Parallel Suite(TM): The Java(TM) library for * Parallel, Distributed, Multi-Core Computing for * Enterprise Grids & Clouds * * Copyright (C) 1997-2015 INRIA/University of * Nice-Sophia Antipolis/ActiveEon * Contact: proactive@ow2.org or contact@activeeon.com * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Affero General Public License * as published by the Free Software Foundation; version 3 of * the License. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA * * If needed, contact us to obtain a release under GPL Version 2 or 3 * or a different license than the AGPL. * * Initial developer(s): The ProActive Team * http://proactive.inria.fr/team_members.htm * Contributor(s): * * ################################################################ * $$PROACTIVE_INITIAL_DEV$$ */ package org.ow2.proactive_grid_cloud_portal.common.client; import com.google.gwt.core.client.GWT; import com.google.gwt.user.client.ui.FileUpload; import com.google.gwt.user.client.ui.FormPanel; import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent; import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler; import com.google.gwt.user.client.ui.Hidden; import com.google.gwt.user.client.ui.VerticalPanel; import com.smartgwt.client.types.Alignment; import com.smartgwt.client.widgets.IButton; import com.smartgwt.client.widgets.Label; import com.smartgwt.client.widgets.Window; import com.smartgwt.client.widgets.events.ClickEvent; import com.smartgwt.client.widgets.events.ClickHandler; import com.smartgwt.client.widgets.events.DrawEvent; import com.smartgwt.client.widgets.events.DrawHandler; import com.smartgwt.client.widgets.form.DynamicForm; import com.smartgwt.client.widgets.form.fields.CheckboxItem; import com.smartgwt.client.widgets.form.fields.PasswordItem; import com.smartgwt.client.widgets.form.fields.TextItem; import com.smartgwt.client.widgets.form.fields.events.ChangedEvent; import com.smartgwt.client.widgets.form.fields.events.ChangedHandler; import com.smartgwt.client.widgets.form.validator.CustomValidator; import com.smartgwt.client.widgets.form.validator.Validator; import com.smartgwt.client.widgets.layout.HLayout; import com.smartgwt.client.widgets.layout.Layout; import com.smartgwt.client.widgets.layout.VLayout; /** * Helper to create and download a Credential file for future authentication * * * @author mschnoor * */ public class CredentialsWindow { private Window window; private boolean disableFormWrapper = true; public CredentialsWindow() { this.build(); } public void show() { this.window.show(); } public void destroy() { this.window.destroy(); } private void build() { /* smartGWT forms don't allow simple multipart file upload, * so we use a smartGWT form for login/password/checkbox, * a pure GWT form for file upload, and upon submission, * put the fields from the first form as hidden fields of the * pure GWT form. It's a bit convoluted but like this we get * the pretty widgets and the nice features */ TextItem loginField = new TextItem("login", "Login"); loginField.setRequired(true); PasswordItem passwordField = new PasswordItem("password", "Password"); passwordField.setRequired(true); final CheckboxItem moreField = new CheckboxItem("useSSH", "Use SSH private key"); moreField.setValue(false); // smartGWT form: only used to input the data before filling the hidden fields // in the other form with it final DynamicForm form = new DynamicForm(); form.setFields(loginField, passwordField, moreField); // pure GWT form for uploading, will be used to contact the servlet // even if no ssh key is used final FileUpload fileUpload = new FileUpload(); fileUpload.setName("sshkey"); final Hidden hiddenUser = new Hidden("username"); final Hidden hiddenPass = new Hidden("password"); final FormPanel formPanel = new FormPanel(); formPanel.setEncoding(FormPanel.ENCODING_MULTIPART); formPanel.setMethod(FormPanel.METHOD_POST); formPanel.setAction(GWT.getModuleBaseURL() + "createcredential"); final VerticalPanel vpan = new VerticalPanel(); vpan.add(hiddenUser); vpan.add(hiddenPass); vpan.add(fileUpload); formPanel.setWidget(vpan); formPanel.setWidth("100%"); formPanel.setHeight("30px"); final HLayout formWrapper = new HLayout(); formWrapper.setAlign(Alignment.CENTER); formWrapper.addChild(formPanel); formWrapper.setWidth100(); formWrapper.addDrawHandler(new DrawHandler() { public void onDraw(DrawEvent event) { // took me half a day to find this hack: // if the form is added to the page in a hidden element, // it is never created and submission fails without callback. // it needs to be visible so that it is created once, then // we can safely hide it and still use it if (disableFormWrapper) { disableFormWrapper = false; formWrapper.setVisible(false); } } }); // hide/show the ssh key upload input moreField.addChangedHandler(new ChangedHandler() { public void onChanged(ChangedEvent event) { if (moreField.getValueAsBoolean()) { formWrapper.setVisible(true); } else { formWrapper.setVisible(false); formPanel.reset(); } } }); // prevent form validation if no ssh key is selected Validator moreVal = new CustomValidator() { @Override protected boolean condition(Object value) { if (moreField.getValueAsBoolean()) { String file = fileUpload.getFilename(); return (file != null && file.length() > 0); } else { return true; } } }; moreVal.setErrorMessage("No file selected"); moreField.setValidators(moreVal); final IButton clearButton = new IButton("Clear"); clearButton.setIcon(Images.instance.clear_16().getSafeUri().asString()); clearButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { form.clearValues(); formPanel.reset(); formWrapper.setVisible(false); } }); final IButton closeButton = new IButton("Close"); final Label label = new Label("A Credential is a file containing all information used" + " for authentication, in an encrypted form. It allows easier authentication and" + " automation."); label.setHeight(50); final HLayout buttonBar = new HLayout(); final IButton okButton = new IButton(); okButton.setShowDisabled(false); okButton.setIcon(Images.instance.ok_16().getSafeUri().asString()); okButton.setTitle("Create"); okButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { if (!form.validate()) return; String login = form.getValueAsString("login"); String pw = form.getValueAsString("password"); hiddenUser.setValue(login); hiddenPass.setValue(pw); formPanel.submit(); } }); closeButton.setIcon(Images.instance.cancel_16().getSafeUri().asString()); closeButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { CredentialsWindow.this.window.hide(); CredentialsWindow.this.destroy(); } }); formPanel.addSubmitCompleteHandler(new SubmitCompleteHandler() { public void onSubmitComplete(SubmitCompleteEvent event) { /* this happens only on error, if the call succeeds, * the response is relocated so that a 'save file' dialog appears */ String str = event.getResults(); label.setContents("<span style='color:red;'>" + str + "</span>"); } }); Layout formLayout = new VLayout(); formLayout.setHeight100(); formLayout.setWidth100(); formLayout.setMembersMargin(10); formLayout.addMember(form); formLayout.addMember(formWrapper); buttonBar.setWidth100(); buttonBar.setAlign(Alignment.RIGHT); buttonBar.setMembersMargin(5); buttonBar.setMembers(clearButton, okButton, closeButton); formLayout.addMember(buttonBar); VLayout layout = new VLayout(); layout.setMembersMargin(10); layout.setMargin(5); layout.setMembers(label, formLayout, buttonBar); this.window = new Window(); this.window.setTitle("Create Credentials"); this.window.setShowMinimizeButton(false); this.window.setIsModal(true); this.window.setShowModalMask(true); this.window.addItem(layout); this.window.setWidth(370); this.window.setHeight(260); this.window.centerInPage(); } }