Java tutorial
/******************************************************************************* * Copyright (c) 2008, 2010 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.ui.internal.net; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.eclipse.core.internal.net.ProxyData; import org.eclipse.core.internal.net.ProxySelector; import org.eclipse.jface.viewers.CheckStateChangedEvent; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ColumnPixelData; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.ICheckStateListener; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableLayout; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Table; /** * This class is the Composite that consists of the controls for proxy entries * and is used by ProxyPreferencesPage. */ public class ProxyEntriesComposite extends Composite { private Label entriesLabel; private CheckboxTableViewer entriesViewer; // private Button addButton; private Button editButton; private Button removeButton; protected String currentProvider; private ArrayList proxyEntries = new ArrayList(); ProxyEntriesComposite(Composite parent, int style) { super(parent, style); createWidgets(); } protected void createWidgets() { setLayout(new GridLayout(2, false)); entriesLabel = new Label(this, SWT.NONE); entriesLabel.setText(NetUIMessages.ProxyPreferencePage_1); entriesLabel.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false, 2, 1)); Table entriesTable = new Table(this, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL | SWT.MULTI | SWT.FULL_SELECTION | SWT.CHECK); entriesTable.setHeaderVisible(true); entriesTable.setLinesVisible(true); entriesTable.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 3)); entriesViewer = new CheckboxTableViewer(entriesTable); ProxyEntriesLabelProvider labelProvider = new ProxyEntriesLabelProvider(); ProxyEntriesContentProvider contentProvider = new ProxyEntriesContentProvider(); labelProvider.createColumns(entriesViewer); entriesViewer.setContentProvider(contentProvider); entriesViewer.setLabelProvider(labelProvider); TableLayout tableLayout = new TableLayout(); tableLayout.addColumnData(new ColumnPixelData(24)); tableLayout.addColumnData(new ColumnWeightData(20, 50, true)); tableLayout.addColumnData(new ColumnWeightData(50, 50, true)); tableLayout.addColumnData(new ColumnWeightData(20, 50, true)); tableLayout.addColumnData(new ColumnWeightData(20, 50, true)); tableLayout.addColumnData(new ColumnWeightData(20, 50, true)); tableLayout.addColumnData(new ColumnWeightData(50, 50, true)); tableLayout.addColumnData(new ColumnWeightData(50, 50, true)); entriesTable.setLayout(tableLayout); // addButton = createButton(NetUIMessages.ProxyPreferencePage_9); editButton = createButton(NetUIMessages.ProxyPreferencePage_10); removeButton = createButton(NetUIMessages.ProxyPreferencePage_11); entriesViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { enableButtons(); } }); entriesViewer.addCheckStateListener(new ICheckStateListener() { public void checkStateChanged(CheckStateChangedEvent event) { setProvider(currentProvider); } }); entriesViewer.addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(DoubleClickEvent event) { editSelection(); } }); // addButton.addSelectionListener(new SelectionAdapter() { // public void widgetSelected(SelectionEvent e) { // addEntry(); // } // }); editButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { editSelection(); } }); removeButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { removeSelection(); } }); initializeValues(); enableButtons(); } protected void enableButtons() { boolean enabled = getEnabled(); if (enabled) { // addButton.setEnabled(true); editButton.setEnabled(isSelectionEditable()); removeButton.setEnabled(isSelectionRemovable()); } else { // addButton.setEnabled(false); editButton.setEnabled(false); removeButton.setEnabled(false); } } private boolean isSelectionEditable() { IStructuredSelection selection = (IStructuredSelection) entriesViewer.getSelection(); return isSelectionRemovable() && selection.size() == 1; } private boolean isSelectionRemovable() { IStructuredSelection selection = (IStructuredSelection) entriesViewer.getSelection(); Iterator iterator = selection.iterator(); boolean editable = iterator.hasNext(); while (iterator.hasNext()) { String provider = ((ProxyData) iterator.next()).getSource(); if (!ProxySelector.canSetProxyData(provider)) { editable = false; } } return editable; } protected void addEntry() { Iterator it = proxyEntries.iterator(); ArrayList added = new ArrayList(); String editableProvider = getEditableProvider(); while (it.hasNext()) { ProxyData data = (ProxyData) it.next(); if (data.getSource().equalsIgnoreCase(editableProvider)) { added.add(data.getType()); } } String addedArray[] = (String[]) added.toArray(new String[0]); ProxyData data = promptForEntry(null, addedArray, NetUIMessages.ProxyEntryDialog_0); if (data != null) { data.setSource(editableProvider); proxyEntries.add(0, data); entriesViewer.refresh(); } } private String getEditableProvider() { String providers[] = ProxySelector.getProviders(); for (int i = 0; i < providers.length; i++) { if (ProxySelector.canSetProxyData(providers[i])) { return providers[i]; } } return null; } private ProxyData promptForEntry(ProxyData entry, String[] addedArray, String title) { ProxyEntryDialog dialog = new ProxyEntryDialog(getShell(), entry, addedArray, title); int result = dialog.open(); if (result != Window.CANCEL) { return dialog.getValue(); } return null; } protected void editSelection() { if (!isSelectionRemovable()) { return; } Iterator itsel = ((IStructuredSelection) entriesViewer.getSelection()).iterator(); ProxyData toEdit = null; if (itsel.hasNext()) { toEdit = ((ProxyData) itsel.next()); } else { return; } Iterator it = proxyEntries.iterator(); ArrayList added = new ArrayList(); String editableProvider = getEditableProvider(); while (it.hasNext()) { ProxyData data = (ProxyData) it.next(); if (data.getSource().equalsIgnoreCase(editableProvider)) { if (data.getType() != toEdit.getType()) { added.add(data.getType()); } } } String addedArray[] = (String[]) added.toArray(new String[0]); ProxyData data = promptForEntry(toEdit, addedArray, NetUIMessages.ProxyEntryDialog_1); if (data != null) { entriesViewer.refresh(); } } protected void removeSelection() { IStructuredSelection selection = (IStructuredSelection) entriesViewer.getSelection(); Iterator it = selection.iterator(); while (it.hasNext()) { ProxyData data = (ProxyData) it.next(); data.setHost(""); //$NON-NLS-1$ data.setPort(-1); data.setUserid(null); data.setPassword(null); } entriesViewer.refresh(); } private Button createButton(String message) { Button button = new Button(this, SWT.PUSH); button.setText(message); button.setLayoutData(new GridData(SWT.FILL, SWT.TOP, false, false)); return button; } public void initializeValues() { String providers[] = ProxySelector.getProviders(); for (int i = 0; i < providers.length; i++) { proxyEntries.addAll(getProxyData(providers[i])); } entriesViewer.setInput(proxyEntries); setProvider(ProxySelector.getDefaultProvider()); } public void setProvider(String item) { if (item == null) { item = currentProvider; } else { currentProvider = item; } ArrayList checked = new ArrayList(); Iterator it = proxyEntries.iterator(); while (it.hasNext()) { ProxyData data = (ProxyData) it.next(); if (data.getSource().equalsIgnoreCase(item)) { checked.add(data); } } entriesViewer.setCheckedElements(checked.toArray(new ProxyData[0])); } public void performApply() { String provider = getEditableProvider(); Iterator it = proxyEntries.iterator(); ArrayList proxies = new ArrayList(); while (it.hasNext()) { ProxyData data = (ProxyData) it.next(); if (data.getSource().equals(provider)) { proxies.add(data); } } ProxyData data[] = (ProxyData[]) proxies.toArray(new ProxyData[0]); ProxySelector.setProxyData(provider, data); } public void refresh() { String provider = getEditableProvider(); Iterator it = proxyEntries.iterator(); ArrayList natives = new ArrayList(); while (it.hasNext()) { ProxyData data = (ProxyData) it.next(); if (!data.getSource().equals(provider)) { natives.add(data); } } proxyEntries.removeAll(natives); String[] providers = ProxySelector.getProviders(); for (int i = 0; i < providers.length; i++) { if (!providers[i].equals(provider)) { proxyEntries.addAll(getProxyData(providers[i])); } } entriesViewer.refresh(); setProvider(currentProvider); } private List getProxyData(String provider) { List proxyDatas = new ArrayList(); ProxyData[] entries = ProxySelector.getProxyData(provider); for (int j = 0; j < entries.length; j++) { entries[j].setSource(provider); proxyDatas.add(entries[j]); } return proxyDatas; } }