Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * 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 org.apache.felix.sigil.eclipse.ui.internal.preferences; import java.util.Comparator; import java.util.Iterator; import java.util.TreeSet; import org.apache.felix.sigil.common.model.ModelElementFactory; import org.apache.felix.sigil.common.model.eclipse.ILibrary; import org.apache.felix.sigil.common.model.osgi.IPackageImport; import org.apache.felix.sigil.common.osgi.VersionTable; import org.apache.felix.sigil.eclipse.ui.util.DefaultTableProvider; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Point; 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.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.Text; import org.osgi.framework.Version; public class LibraryConfigurationDialog extends TitleAreaDialog { private static final Comparator<IPackageImport> COMPARATOR = new Comparator<IPackageImport>() { public int compare(IPackageImport o1, IPackageImport o2) { return o1.getPackageName().compareTo(o2.getPackageName()); } }; private String name; private Version version; private TreeSet<IPackageImport> packageImports = new TreeSet<IPackageImport>(COMPARATOR); private boolean editOnly; private TableViewer viewer; private Text txtName; private Text txtVersion; public LibraryConfigurationDialog(Shell parentShell) { super(parentShell); name = ""; version = Version.emptyVersion; } public LibraryConfigurationDialog(Shell parentShell, ILibrary lib) { super(parentShell); editOnly = true; name = lib.getName(); version = lib.getVersion(); packageImports.addAll(lib.getImports()); } @Override protected Control createDialogArea(Composite par) { setTitle("Add Library"); Composite container = (Composite) super.createDialogArea(par); Composite topPanel = new Composite(container, SWT.NONE); new Label(topPanel, SWT.NONE).setText("Name"); txtName = new Text(topPanel, SWT.BORDER); txtName.setEditable(!editOnly); if (name != null) txtName.setText(name); new Label(topPanel, SWT.NONE).setText("Version"); txtVersion = new Text(topPanel, SWT.BORDER); txtVersion.setText(version.toString()); txtVersion.setEditable(!editOnly); Composite bottomPanel = new Composite(container, SWT.NONE); Table table = new Table(bottomPanel, SWT.BORDER); table.setSize(new Point(300, 200)); Button add = new Button(bottomPanel, SWT.PUSH); add.setText("Add..."); final Button edit = new Button(bottomPanel, SWT.PUSH); edit.setText("Edit..."); edit.setEnabled(false); final Button remove = new Button(bottomPanel, SWT.PUSH); remove.setText("Remove"); remove.setEnabled(false); updateState(); // Hookup Listeners txtName.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { updateState(); } }); txtVersion.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { updateState(); } }); add.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { handleAdd(); } }); edit.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { handleEdit(); } }); remove.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { handleRemove(); } }); // Layout topPanel.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); topPanel.setLayout(new GridLayout(2, false)); txtName.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); txtVersion.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); bottomPanel.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); bottomPanel.setLayout(new GridLayout(2, false)); table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 4)); add.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false)); edit.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false)); remove.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false)); // Table Viewer viewer = new TableViewer(table); viewer.setLabelProvider(new LabelProvider() { @Override public String getText(Object element) { IPackageImport pi = (IPackageImport) element; return pi.getPackageName() + " " + pi.getVersions(); } }); viewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { edit.setEnabled(!event.getSelection().isEmpty()); remove.setEnabled(!event.getSelection().isEmpty()); } }); viewer.setContentProvider(new DefaultTableProvider() { public Object[] getElements(Object inputElement) { return toArray(inputElement); } }); viewer.setInput(packageImports); return container; } private void updateState() { String error = null; String warning = null; name = txtName.getText(); try { version = VersionTable.getVersion(txtVersion.getText()); if (version.getQualifier().indexOf('_') > -1) { warning = "The use of underscores in a version qualifier is discouraged."; } } catch (IllegalArgumentException e) { version = null; error = "Invalid version format"; } Button okButton = getButton(IDialogConstants.OK_ID); if (okButton != null && !okButton.isDisposed()) okButton.setEnabled(allowOkay()); setErrorMessage(error); setMessage(warning, IMessageProvider.WARNING); } private boolean allowOkay() { return name != null && name.length() > 0 && version != null; } @Override protected Button createButton(Composite parent, int id, String label, boolean defaultButton) { Button button = super.createButton(parent, id, label, defaultButton); if (id == IDialogConstants.OK_ID) { button.setEnabled(allowOkay()); } return button; } private void handleAdd() { /*NewResourceSelectionDialog<? extends IPackageModelElement> dialog = ResourcesDialogHelper.createImportDialog(getShell(), "Add Imported Package", null, packageImports); if ( dialog.open() == Window.OK ) { IPackageImport pi = ModelElementFactory.getInstance().newModelElement(IPackageImport.class); pi.setPackageName(dialog.getSelectedName()); pi.setVersions(dialog.getSelectedVersions()); pi.setOptional(dialog.isOptional()); packageImports.add(pi); viewer.refresh(); }*/ } private void handleEdit() { /*IStructuredSelection selection = (IStructuredSelection) viewer.getSelection(); boolean changed = false; if ( !selection.isEmpty() ) { for ( Iterator<IPackageImport> i = selection.iterator(); i.hasNext(); ) { IPackageImport packageImport = i.next(); NewResourceSelectionDialog<? extends IPackageModelElement> dialog = ResourcesDialogHelper.createImportDialog( getShell(), "Edit Imported Package", packageImport, packageImports ); dialog.setVersions( packageImport.getVersions() ); dialog.setOptional(packageImport.isOptional()); if ( dialog.open() == Window.OK ) { changed = true; String packageName = dialog.getSelectedName(); VersionRange versionRange = dialog.getSelectedVersions(); IPackageImport newImport = ModelElementFactory.getInstance().newModelElement(IPackageImport.class); newImport.setPackageName(packageName); newImport.setVersions(versionRange); newImport.setOptional(dialog.isOptional()); packageImports.remove(packageImport); packageImports.add(newImport); } } } if ( changed ) { viewer.refresh(); } */ } @SuppressWarnings("unchecked") private void handleRemove() { IStructuredSelection selection = (IStructuredSelection) viewer.getSelection(); if (!selection.isEmpty()) { for (Iterator<IPackageImport> i = selection.iterator(); i.hasNext();) { packageImports.remove(i.next()); } viewer.refresh(); } } public ILibrary getLibrary() { ILibrary library = ModelElementFactory.getInstance().newModelElement(ILibrary.class); library.setName(name); library.setVersion(version); for (IPackageImport pi : packageImports) { library.addImport(pi); } return library; } }