Java tutorial
/* Copyright 2011 Massimo Gengarelli <gengarel@cs.unibo.it> * This file is part of Floz Configurator. * Floz Configurator is free software: you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Floz Configurator 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Floz Configurator. If not, see http://www.gnu.org/licenses/. */ package it.unibo.cs.v2.client; import it.unibo.cs.v2.servlets.DeleteMachine; import it.unibo.cs.v2.servlets.DeleteMachineAsync; import it.unibo.cs.v2.servlets.RemoveShare; import it.unibo.cs.v2.servlets.RemoveShareAsync; import it.unibo.cs.v2.servlets.ShareMachine; import it.unibo.cs.v2.servlets.ShareMachineAsync; import it.unibo.cs.v2.servlets.StartMachine; import it.unibo.cs.v2.servlets.StartMachineAsync; import it.unibo.cs.v2.shared.MachineInfo; import it.unibo.cs.v2.shared.MachineProcessInfo; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.Anchor; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.CheckBox; import com.google.gwt.user.client.ui.FlexTable; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.HTMLPanel; import com.google.gwt.user.client.ui.HorizontalPanel; import com.google.gwt.user.client.ui.Image; import com.google.gwt.user.client.ui.ListBox; import com.google.gwt.user.client.ui.Widget; public class MachinePanel extends HTMLPanel { private final MachineInfo machineInfo; // HTML items private final HTML descriptionHTML; private final HTML basicHTML; private final HTML storageHdaHTML; private final HTML storageHdbHTML; private final HTML virtuaClusterHTML; private final HTML secondNetworkHTML; private final Widget workingSharesHTML; private final HTML pendingSharesHTML = new HTML(); private final HTML newLine = new HTML("<br />"); // Share items private final UsersSuggestBox usersBox = new UsersSuggestBox(); private Anchor addShare = new Anchor("Add"); // ListBox for ISOs private final ListBox bootFrom = new ListBox(); // Checkbox to allow the user to open the Java Applet in a new Window private final CheckBox newWindow = new CheckBox("Open in a new Window"); // Checkbox to allow the user to set the -usbdevice tablet for this particular machine private final CheckBox tabletDevice = new CheckBox("Set tablet device (-usbdevice tablet)"); // Start/Delete machine buttons private final HorizontalPanel startDeletePanel = new HorizontalPanel(); private final Button startButton = new Button("Start/View machine"); private final Button deleteButton = new Button("Delete machine"); // Proxies private final StartMachineAsync startMachineProxy = GWT.create(StartMachine.class); private final DeleteMachineAsync deleteMachineProxy = GWT.create(DeleteMachine.class); private final ShareMachineAsync shareMachineProxy = GWT.create(ShareMachine.class); private final RemoveShareAsync removeShareProxy = GWT.create(RemoveShare.class); // AsyncCallback for addShareButton private final AsyncCallback<Boolean> addShareCallback = new AsyncCallback<Boolean>() { @Override public void onFailure(Throwable caught) { Window.alert(caught.getMessage()); } @Override public void onSuccess(Boolean result) { if (result) { machineInfo.addPendingShare(usersBox.getText()); usersBox.setText(""); refreshPendingShares(); } else usersBox.setText(""); } }; // Handler for startButton private final ClickHandler startButtonClickHandler = new ClickHandler() { @Override public void onClick(ClickEvent event) { startButton.setEnabled(false); machineInfo.setBootCdrom(bootFrom.getValue(bootFrom.getSelectedIndex()).equals("d")); machineInfo.setTabletDevice(tabletDevice.getValue()); final Image loadingGif = new Image("loading.gif"); add(loadingGif); // MachineProcessInfo dummyMPI = new MachineProcessInfo(); // dummyMPI.setMachineName("Dummy Machine"); // dummyMPI.setOwned(true); // dummyMPI.setVncServer(10); // dummyMPI.setPid(0); // MainPage.getInstance().showApplet(dummyMPI, newWindow.getValue()); startMachineProxy.startViewMachine(machineInfo, new AsyncCallback<MachineProcessInfo>() { @Override public void onFailure(Throwable caught) { Window.alert(caught.getMessage()); remove(loadingGif); startButton.setEnabled(true); } @Override public void onSuccess(MachineProcessInfo result) { MainPage.getInstance().showApplet(result, newWindow.getValue()); startButton.setEnabled(true); remove(loadingGif); } }); } }; // Handler for deleteButton private final ClickHandler deleteButtonClickHandler = new ClickHandler() { @Override public void onClick(ClickEvent event) { final FlozDialogBox confirmDelete = new FlozDialogBox("Delete " + machineInfo.getName() + "?"); final Button okButton = new Button("Yes, do it!"); final Button cancelButton = new Button("No please! Don't!"); confirmDelete.add(new HTML( "<h3>Confirmation box</h3>Are you sure you want to delete " + machineInfo.getName() + "?")); okButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { deleteMachineProxy.deleteMachine(machineInfo, new AsyncCallback<Boolean>() { @Override public void onFailure(Throwable caught) { Window.alert(caught.getMessage()); confirmDelete.hide(); } @Override public void onSuccess(Boolean result) { clear(); add(new HTML("<span style=\"color: green\">Machine deleted successfully!</span>")); confirmDelete.hide(); MainPanel.getInstance().refresh(); } }); } }); cancelButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { confirmDelete.hide(); } }); confirmDelete.addButton(okButton); confirmDelete.addButton(cancelButton); confirmDelete.showRelativeTo(descriptionHTML); } }; // Handler for addShare Anchor private final ClickHandler addShareClickHandler = new ClickHandler() { @Override public void onClick(ClickEvent event) { if (usersBox.getText().equals("")) return; if (machineInfo.getPendingShares().length > 0) { for (String user : machineInfo.getPendingShares()) if (user.equals(usersBox.getText())) { usersBox.setText(""); return; } } if (machineInfo.getShares().length > 0) { for (String user : machineInfo.getShares()) if (user.equals(usersBox.getText())) { usersBox.setText(""); return; } } shareMachineProxy.shareMachine(machineInfo, usersBox.getText(), addShareCallback); } }; public MachinePanel(final MachineInfo machineInfo, boolean belongs) { super("<b>Description</b>"); this.machineInfo = machineInfo; // Setup the objects before building the main HTMLPanel bootFrom.addItem("Hard Disk", "c"); bootFrom.addItem("CD-Rom", "d"); startButton.addClickHandler(startButtonClickHandler); deleteButton.addClickHandler(deleteButtonClickHandler); addShare.addClickHandler(addShareClickHandler); startDeletePanel.add(startButton); startDeletePanel.add(deleteButton); descriptionHTML = new HTML(machineInfo.getDescription()); basicHTML = new HTML(" CD-ROM: " + machineInfo.getIso()); storageHdaHTML = new HTML( " HDA: " + machineInfo.getHda() + " (" + machineInfo.getHdaSize() + ")"); storageHdbHTML = new HTML(" HDB: " + (machineInfo.isHdbEnabled() ? machineInfo.getHdb() + " (" + machineInfo.getHdbSize() + ")" : "not enabled")); virtuaClusterHTML = new HTML(" VirtuaCluster support is <b>" + (machineInfo.isVirtuacluster() ? "enabled" : "disabled") + "</b>"); secondNetworkHTML = new HTML(" Secondary network: " + (machineInfo.isSecondNetwork() ? machineInfo.getSocketPath() + " (" + machineInfo.getMacAddress() + ")" : "not enabled")); // get the shares if (belongs) { refreshPendingShares(); if (machineInfo.getShares().length < 1) workingSharesHTML = new HTML(" No accepted shares<br />"); else { String[] shares = machineInfo.getShares(); workingSharesHTML = new FlexTable(); int row = 0; for (final String s : shares) { final Anchor removeShare = new Anchor("Remove"); final int currentRow = row; removeShare.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { final Image loadingGif = new Image("loading.gif"); ((FlexTable) workingSharesHTML).remove(removeShare); ((FlexTable) workingSharesHTML).setWidget(currentRow, 1, loadingGif); removeShareProxy.removeShare(machineInfo, s, new AsyncCallback<Boolean>() { @Override public void onFailure(Throwable caught) { Window.alert(caught.getMessage()); } @Override public void onSuccess(Boolean result) { if (result) { ((FlexTable) workingSharesHTML).remove(loadingGif); ((FlexTable) workingSharesHTML).setWidget(currentRow, 1, new HTML("<b>No longer sharing</b>")); } } }); } }); ((FlexTable) workingSharesHTML).setWidget(row, 0, new HTML(s + " ")); ((FlexTable) workingSharesHTML).setWidget(row, 1, removeShare); row++; } } } else { pendingSharesHTML .setHTML(" This machine belongs to: <b>" + machineInfo.getRealOwner() + "</b>"); workingSharesHTML = new HTML( " This machine belongs to: <b>" + machineInfo.getRealOwner() + "</b>"); } // Build up the HTML add(descriptionHTML); add(newLine); add(new HTML("<br /><b>Basic settings</b><br />")); add(basicHTML); add(newLine); add(new HTML("<br /><b>Storage</b><br />")); add(storageHdaHTML); add(newLine); add(storageHdbHTML); add(newLine); add(newLine); add(new HTML("<br /><b>Networking</b><br />")); add(virtuaClusterHTML); add(newLine); add(secondNetworkHTML); add(newLine); add(new HTML("<br /><b>Pending Shares</b><br />")); add(pendingSharesHTML); add(newLine); add(new HTML("<br /><b>Accepted Shares</b><br />")); add(workingSharesHTML); add(newLine); if (belongs) { add(new HTML("<br /><b>Add a new share</b><br />")); add(usersBox); add(addShare); } if (belongs) { add(new HTML("<br /><b>Boot order</b><br />")); add(bootFrom); add(newLine); } add(new HTML("<br /><b>Command</b></br />")); tabletDevice.setValue(true); add(tabletDevice); // add(newLine); // add(newWindow); add(startDeletePanel); } private void refreshPendingShares() { if (machineInfo.getPendingShares().length < 1) pendingSharesHTML.setHTML(" No pending shares"); else { String[] shares = machineInfo.getPendingShares(); String html = ""; for (String s : shares) html += " " + s + "<br />"; pendingSharesHTML.setHTML(html); } } }