Java tutorial
/* * Copyright (c) 2014, 2015 Eike Stepper (Berlin, Germany) 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: * Eike Stepper - initial API and implementation */ package org.eclipse.oomph.setup.ui; import org.eclipse.oomph.setup.LicenseInfo; import org.eclipse.equinox.p2.metadata.IInstallableUnit; import org.eclipse.equinox.p2.metadata.ILicense; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogSettings; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.SashForm; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Text; import java.util.Iterator; import java.util.List; import java.util.Map; /** * @author Eike Stepper */ public class LicenseDialog extends AbstractConfirmDialog { private static final String LIST_WEIGHT = "ListSashWeight"; //$NON-NLS-1$ private static final String LICENSE_WEIGHT = "LicenseSashWeight"; //$NON-NLS-1$ private static final int PRIMARY_COLUMN_WIDTH = 60; private static final int COLUMN_WIDTH = 40; private static final int TABLE_HEIGHT = 10; private final Map<ILicense, List<IInstallableUnit>> licensesToIUs; private SashForm sashForm; private TreeViewer viewer; private Text licenseTextBox; public LicenseDialog(Map<ILicense, List<IInstallableUnit>> licensesToIUs) { super("Licenses", 1000, 600, "Remember accepted licenses"); this.licensesToIUs = licensesToIUs; } @Override protected String getShellText() { return "Oomph License Confirmation"; } @Override protected String getDefaultMessage() { return "Review and accept licenses before the software can be installed."; } @Override protected void createUI(Composite parent) { initializeDialogUnits(parent); List<IInstallableUnit> ius; Control control; if (licensesToIUs.size() == 1 && (ius = licensesToIUs.values().iterator().next()).size() == 1) { control = createLicenseContentSection(parent, ius.get(0)); } else { sashForm = new SashForm(parent, SWT.SMOOTH | SWT.HORIZONTAL); sashForm.setLayout(new GridLayout()); GridData gd = new GridData(GridData.FILL_BOTH); sashForm.setLayoutData(gd); createLicenseListSection(sashForm); createLicenseContentSection(sashForm, null); sashForm.setWeights(getSashWeights()); control = sashForm; } Dialog.applyDialogFont(control); } private void createLicenseListSection(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginWidth = 0; layout.marginHeight = 0; composite.setLayout(layout); GridData gd = new GridData(GridData.FILL_BOTH); composite.setLayoutData(gd); viewer = new TreeViewer(composite, SWT.FULL_SELECTION | SWT.H_SCROLL | SWT.V_SCROLL); viewer.setContentProvider(new LicenseContentProvider()); viewer.setLabelProvider(new LicenseLabelProvider()); viewer.setComparator(new ViewerComparator()); viewer.setInput(licensesToIUs); viewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { handleSelectionChanged((IStructuredSelection) event.getSelection()); } }); gd = new GridData(GridData.FILL_BOTH); gd.widthHint = convertWidthInCharsToPixels(PRIMARY_COLUMN_WIDTH); gd.heightHint = convertHeightInCharsToPixels(TABLE_HEIGHT); viewer.getControl().setLayoutData(gd); } private Composite createLicenseContentSection(Composite parent, IInstallableUnit singleIU) { Composite composite = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginWidth = 0; layout.marginHeight = 0; composite.setLayout(layout); GridData gd = new GridData(GridData.FILL_BOTH); composite.setLayoutData(gd); licenseTextBox = new Text(composite, SWT.MULTI | SWT.V_SCROLL | SWT.WRAP | SWT.READ_ONLY); licenseTextBox.setBackground(licenseTextBox.getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND)); initializeDialogUnits(licenseTextBox); gd = new GridData(GridData.FILL_BOTH); gd.heightHint = convertHeightInCharsToPixels(TABLE_HEIGHT); gd.widthHint = convertWidthInCharsToPixels(COLUMN_WIDTH); licenseTextBox.setLayoutData(gd); if (singleIU != null) { String licenseBody = ""; //$NON-NLS-1$ Iterator<ILicense> licenses = singleIU.getLicenses(null).iterator(); ILicense license = licenses.hasNext() ? licenses.next() : null; if (license != null && license.getBody() != null) { licenseBody = license.getBody(); } licenseTextBox.setText(licenseBody); } return composite; } @SuppressWarnings("restriction") private void handleSelectionChanged(IStructuredSelection selection) { if (!selection.isEmpty()) { Object selected = selection.getFirstElement(); if (selected instanceof org.eclipse.equinox.internal.p2.metadata.License) { licenseTextBox.setText(((org.eclipse.equinox.internal.p2.metadata.License) selected).getBody()); } else if (selected instanceof IUWithLicenseParent) { licenseTextBox.setText(((IUWithLicenseParent) selected).license.getBody()); } } } private int[] getSashWeights() { try { int[] weights = new int[2]; IDialogSettings settings = getDialogSettings(); if (settings.get(LIST_WEIGHT) != null) { weights[0] = settings.getInt(LIST_WEIGHT); if (settings.get(LICENSE_WEIGHT) != null) { weights[1] = settings.getInt(LICENSE_WEIGHT); return weights; } } } catch (NumberFormatException ex) { // Ignore if there actually was a value that didn't parse. } return new int[] { 50, 50 }; } private static String getIUName(IInstallableUnit iu) { StringBuffer buf = new StringBuffer(); String name = iu.getProperty(IInstallableUnit.PROP_NAME, null); if (name != null) { buf.append(name); } else { buf.append(iu.getId()); } buf.append(" "); //$NON-NLS-1$ buf.append(iu.getVersion().toString()); return buf.toString(); } /** * @author Eike Stepper */ private final class IUWithLicenseParent { public final IInstallableUnit iu; public final ILicense license; public IUWithLicenseParent(ILicense license, IInstallableUnit iu) { this.license = license; this.iu = iu; } } /** * @author Eike Stepper */ private final class LicenseContentProvider implements ITreeContentProvider { public Object[] getChildren(Object element) { if (element instanceof ILicense) { if (licensesToIUs.containsKey(element)) { List<IInstallableUnit> iusWithLicense = licensesToIUs.get(element); IInstallableUnit[] ius = iusWithLicense.toArray(new IInstallableUnit[iusWithLicense.size()]); IUWithLicenseParent[] children = new IUWithLicenseParent[ius.length]; for (int i = 0; i < ius.length; i++) { children[i] = new IUWithLicenseParent((ILicense) element, ius[i]); } return children; } } return new Object[0]; } public Object getParent(Object element) { if (element instanceof IUWithLicenseParent) { return ((IUWithLicenseParent) element).license; } return null; } public boolean hasChildren(Object element) { return licensesToIUs.containsKey(element); } public Object[] getElements(Object inputElement) { return licensesToIUs.keySet().toArray(); } public void dispose() { // Nothing to do } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { // Nothing to do } } /** * @author Eike Stepper */ private final class LicenseLabelProvider extends LabelProvider { @Override @SuppressWarnings("restriction") public Image getImage(Object element) { if (element instanceof org.eclipse.equinox.internal.p2.metadata.License) { return SetupUIPlugin.INSTANCE.getSWTImage("license"); } if (element instanceof IUWithLicenseParent || element instanceof IInstallableUnit) { return SetupUIPlugin.INSTANCE.getSWTImage("feature"); } return null; } @Override @SuppressWarnings("restriction") public String getText(Object element) { if (element instanceof org.eclipse.equinox.internal.p2.metadata.License) { return LicenseInfo .getFirstLine(((org.eclipse.equinox.internal.p2.metadata.License) element).getBody()); } if (element instanceof IUWithLicenseParent) { return getIUName(((IUWithLicenseParent) element).iu); } if (element instanceof IInstallableUnit) { return getIUName((IInstallableUnit) element); } return ""; //$NON-NLS-1$ } } }