Java tutorial
/******************************************************************************* * Copyright (c) 2007, 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 * EclipseSource - ongoing development * Sonatype, Inc. - ongoing development *******************************************************************************/ package org.eclipse.equinox.internal.p2.ui.dialogs; import java.util.Collection; import org.eclipse.core.runtime.*; import org.eclipse.equinox.internal.p2.ui.ProvUIActivator; import org.eclipse.equinox.internal.p2.ui.ProvUIMessages; import org.eclipse.equinox.internal.p2.ui.model.*; import org.eclipse.equinox.internal.p2.ui.viewers.*; import org.eclipse.equinox.p2.engine.IProvisioningPlan; import org.eclipse.equinox.p2.metadata.IInstallableUnit; import org.eclipse.equinox.p2.operations.ProfileChangeOperation; import org.eclipse.equinox.p2.operations.ProvisioningJob; import org.eclipse.equinox.p2.query.IQueryable; import org.eclipse.equinox.p2.ui.ProvisioningUI; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.operation.IRunnableWithProgress; import org.eclipse.jface.viewers.*; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.SashForm; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.*; import org.eclipse.swt.widgets.*; import org.eclipse.ui.statushandlers.StatusManager; /** * A wizard page that shows detailed information about a resolved install * operation. It allows drill down into the elements that will be installed. * * @since 3.4 * */ public abstract class ResolutionResultsWizardPage extends ResolutionStatusPage { private static final String DIALOG_SETTINGS_SECTION = "ResolutionResultsPage"; //$NON-NLS-1$ protected IUElementListRoot input; ProfileChangeOperation resolvedOperation; TreeViewer treeViewer; ProvElementContentProvider contentProvider; IUDetailsLabelProvider labelProvider; protected Display display; private IUDetailsGroup iuDetailsGroup; SashForm sashForm; Button relaxConstraints; protected ResolutionResultsWizardPage(ProvisioningUI ui, ProvisioningOperationWizard wizard, IUElementListRoot input, ProfileChangeOperation operation) { super("ResolutionPage", ui, wizard); //$NON-NLS-1$ this.resolvedOperation = operation; if (input == null) this.input = new IUElementListRoot(); else this.input = input; } /* * (non-Javadoc) * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite) */ public void createControl(Composite parent) { display = parent.getDisplay(); sashForm = new SashForm(parent, SWT.VERTICAL); FillLayout layout = new FillLayout(); sashForm.setLayout(layout); GridData data = new GridData(GridData.FILL_BOTH); sashForm.setLayoutData(data); initializeDialogUnits(sashForm); Composite composite = new Composite(sashForm, SWT.NONE); GridLayout gridLayout = new GridLayout(); gridLayout.marginWidth = 0; gridLayout.marginHeight = 0; composite.setLayout(gridLayout); treeViewer = createTreeViewer(composite); data = new GridData(GridData.FILL_BOTH); data.heightHint = convertHeightInCharsToPixels(ILayoutConstants.DEFAULT_TABLE_HEIGHT); data.widthHint = convertWidthInCharsToPixels(ILayoutConstants.DEFAULT_TABLE_WIDTH); Tree tree = treeViewer.getTree(); tree.setLayoutData(data); tree.setHeaderVisible(true); activateCopy(tree); IUColumnConfig[] columns = getColumnConfig(); for (int i = 0; i < columns.length; i++) { TreeColumn tc = new TreeColumn(tree, SWT.LEFT, i); tc.setResizable(true); tc.setText(columns[i].getColumnTitle()); tc.setWidth(columns[i].getWidthInPixels(tree)); } // Filters and sorters before establishing content, so we don't refresh unnecessarily. IUComparator comparator = new IUComparator(IUComparator.IU_NAME); comparator.useColumnConfig(getColumnConfig()); treeViewer.setComparator(comparator); treeViewer.setComparer(new ProvElementComparer()); contentProvider = new ProvElementContentProvider(); treeViewer.setContentProvider(contentProvider); labelProvider = new IUDetailsLabelProvider(null, getColumnConfig(), getShell()); treeViewer.setLabelProvider(labelProvider); // Optional area to show the size createSizingInfo(composite); // The text area shows a description of the selected IU, or error detail if applicable. iuDetailsGroup = new IUDetailsGroup(sashForm, treeViewer, convertWidthInCharsToPixels(ILayoutConstants.DEFAULT_TABLE_WIDTH), true); setControl(sashForm); sashForm.setWeights(getSashWeights()); Dialog.applyDialogFont(sashForm); // Controls for filtering/presentation/site selection Composite controlsComposite = new Composite(composite, SWT.NONE); gridLayout = new GridLayout(); gridLayout.marginWidth = 0; gridLayout.marginHeight = 0; gridLayout.numColumns = 2; gridLayout.makeColumnsEqualWidth = true; gridLayout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING); controlsComposite.setLayout(layout); GridData gd = new GridData(SWT.FILL, SWT.FILL, true, false); controlsComposite.setLayoutData(gd); createViewControlsArea(controlsComposite); final Runnable runnable = new Runnable() { public void run() { treeViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { setDetailText(resolvedOperation); } }); setDrilldownElements(input, resolvedOperation); treeViewer.setInput(input); } }; if (resolvedOperation != null && !resolvedOperation.hasResolved()) { try { getContainer().run(true, false, new IRunnableWithProgress() { public void run(IProgressMonitor monitor) { resolvedOperation.resolveModal(monitor); display.asyncExec(runnable); } }); } catch (Exception e) { StatusManager.getManager() .handle(new Status(IStatus.ERROR, ProvUIActivator.PLUGIN_ID, e.getMessage(), e)); } } else { runnable.run(); } } @Override public void updateStatus(IUElementListRoot newRoot, ProfileChangeOperation op) { super.updateStatus(newRoot, op); IStatus currentStatus = getProvisioningWizard().getCurrentStatus(); if (relaxConstraints != null) relaxConstraints.setEnabled(currentStatus != null && !currentStatus.isOK()); } private void createViewControlsArea(Composite controlsComposite) { relaxConstraints = new Button(controlsComposite, SWT.CHECK); relaxConstraints.setVisible(false); relaxConstraints.setText(ProvUIMessages.ResolutionWizardPage_RelaxedConstraints); relaxConstraints.setToolTipText(ProvUIMessages.ResolutionWizardPage_RelaxedConstraintsTip); relaxConstraints.setSelection(((ProvisioningOperationWizard) getWizard()).getRelaxedResoltion()); relaxConstraints.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { ((ProvisioningOperationWizard) getWizard()).setRelaxedResolution(relaxConstraints.getSelection()); setPageComplete(true); } }); } @Override public void setVisible(boolean visible) { super.setVisible(visible); if (visible) relaxConstraints.setSelection(((ProvisioningOperationWizard) getWizard()).getRelaxedResoltion()); } protected void createSizingInfo(Composite parent) { // Default is to do nothing } public boolean performFinish() { if (resolvedOperation.getResolutionResult().getSeverity() != IStatus.ERROR) { getProvisioningUI().schedule(resolvedOperation.getProvisioningJob(null), StatusManager.SHOW | StatusManager.LOG); return true; } return false; } protected TreeViewer getTreeViewer() { return treeViewer; } public IProvisioningPlan getCurrentPlan() { if (resolvedOperation != null) return resolvedOperation.getProvisioningPlan(); return null; } protected Object[] getSelectedElements() { return ((IStructuredSelection) treeViewer.getSelection()).toArray(); } protected IInstallableUnit getSelectedIU() { java.util.List<IInstallableUnit> units = ElementUtils.elementsToIUs(getSelectedElements()); if (units.size() == 0) return null; return units.get(0); } protected boolean shouldCompleteOnCancel() { return false; } protected Collection<IInstallableUnit> getIUs() { return ElementUtils.elementsToIUs(input.getChildren(input)); } void setDrilldownElements(IUElementListRoot root, ProfileChangeOperation operation) { if (operation == null || operation.getProvisioningPlan() == null) return; Object[] elements = root.getChildren(root); for (int i = 0; i < elements.length; i++) { if (elements[i] instanceof QueriedElement) { ((QueriedElement) elements[i]).setQueryable(getQueryable(operation.getProvisioningPlan())); } } } protected abstract String getOperationLabel(); /** * Returns the restart policy for this operation. * * @return an integer constant describing whether the running profile * needs to be restarted. * * @see ProvisioningJob#RESTART_NONE * @see ProvisioningJob#RESTART_ONLY * @see ProvisioningJob#RESTART_OR_APPLY * */ protected int getRestartPolicy() { return ProvisioningJob.RESTART_OR_APPLY; } /** * Returns the task name for this operation, or <code>null</code> to display * a generic task name. */ protected String getOperationTaskName() { return null; } protected TreeViewer createTreeViewer(Composite parent) { return new TreeViewer(parent, SWT.BORDER | SWT.MULTI | SWT.FULL_SELECTION); } protected abstract IQueryable<IInstallableUnit> getQueryable(IProvisioningPlan plan); protected String getClipboardText(Control control) { return CopyUtils.getIndentedClipboardText(getSelectedElements(), labelProvider); } protected IUDetailsGroup getDetailsGroup() { return iuDetailsGroup; } protected boolean isCreated() { return treeViewer != null; } protected void updateCaches(IUElementListRoot newRoot, ProfileChangeOperation op) { resolvedOperation = op; if (newRoot != null) { setDrilldownElements(newRoot, resolvedOperation); if (treeViewer != null) { if (input != newRoot) treeViewer.setInput(newRoot); else treeViewer.refresh(); } input = newRoot; } } protected String getDialogSettingsName() { return getWizard().getClass().getName() + "." + DIALOG_SETTINGS_SECTION; //$NON-NLS-1$ } protected int getColumnWidth(int index) { return treeViewer.getTree().getColumn(index).getWidth(); } protected SashForm getSashForm() { return sashForm; } }