Java tutorial
/******************************************************************************* * Copyright (c) 2007 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.dialogs; import java.util.Iterator; import java.util.List; import java.util.Set; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; 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.Shell; import org.eclipse.ui.IWorkingSet; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.internal.WorkbenchMessages; /** * Base implementation for a simple working set dialog that doesn't contain * references to non-editable/non-visible working sets. * * @since 3.4 * */ public class SimpleWorkingSetSelectionDialog extends AbstractWorkingSetDialog { private class Filter extends ViewerFilter { public boolean select(Viewer viewer, Object parentElement, Object element) { return isCompatible((IWorkingSet) element); } private boolean isCompatible(IWorkingSet set) { if (set.isAggregateWorkingSet()) return false; // original JDT code had the catch for self-updating sets that no // one can explain. There doesn't seem to // be a good reason to exclude these sets so the clause has been // removed. // if (set.isAggregateWorkingSet() || !set.isSelfUpdating()) // return false; if (!set.isVisible()) return false; if (!set.isEditable()) return false; Set workingSetTypeIds = getSupportedWorkingSetIds(); if (workingSetTypeIds == null) return true; for (Iterator i = workingSetTypeIds.iterator(); i.hasNext();) { String workingSetTypeId = (String) i.next(); if (workingSetTypeId.equals(set.getId())) return true; } return false; } } private CheckboxTableViewer viewer; private IWorkingSet[] initialSelection; /** * Create a new instance of this class. * * @param shell * the shell to parent this dialog on * @param workingSetTypeIds * the types of working set IDs that will be shown in this dialog * @param selectedWorkingSets * the currently selected working sets (if any) * @param canEdit * whether or not this dialog will display edit controls */ public SimpleWorkingSetSelectionDialog(Shell shell, String[] workingSetTypeIds, IWorkingSet[] selectedWorkingSets, boolean canEdit) { super(shell, workingSetTypeIds, canEdit); this.initialSelection = selectedWorkingSets; setTitle(WorkbenchMessages.WorkingSetSelectionDialog_title_multiSelect); setMessage(WorkbenchMessages.WorkingSetSelectionDialog_message_multiSelect); } protected Control createDialogArea(Composite parent) { initializeDialogUnits(parent); Composite composite = (Composite) super.createDialogArea(parent); Composite viewerComposite = new Composite(composite, SWT.NONE); GridLayout layout = new GridLayout(2, false); layout.marginHeight = layout.marginWidth = 0; layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING); layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING); viewerComposite.setLayout(layout); viewerComposite.setLayoutData(new GridData(GridData.FILL_BOTH)); viewer = CheckboxTableViewer.newCheckList(viewerComposite, SWT.BORDER); viewer.getControl().setLayoutData(new GridData(GridData.FILL_BOTH)); viewer.setLabelProvider(new WorkingSetLabelProvider()); viewer.setContentProvider(new ArrayContentProvider()); viewer.addFilter(new WorkingSetFilter(null)); IWorkingSet[] workingSets = PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSets(); viewer.setInput(workingSets); viewer.setFilters(new ViewerFilter[] { new Filter() }); viewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { handleSelectionChanged(); } }); viewer.setCheckedElements(initialSelection); GridData viewerData = new GridData(GridData.FILL_BOTH); viewerData.widthHint = convertWidthInCharsToPixels(50); viewer.getControl().setLayoutData(viewerData); addModifyButtons(viewerComposite); addSelectionButtons(composite); availableWorkingSetsChanged(); Dialog.applyDialogFont(composite); viewerData.heightHint = viewer.getTable().getItemHeight() * Math.min(30, Math.max(10, workingSets.length)); return composite; } protected void okPressed() { Object[] checked = viewer.getCheckedElements(); IWorkingSet[] workingSets = new IWorkingSet[checked.length]; System.arraycopy(checked, 0, workingSets, 0, checked.length); setSelection(workingSets); super.okPressed(); } protected List getSelectedWorkingSets() { ISelection selection = viewer.getSelection(); if (selection instanceof IStructuredSelection) { return ((IStructuredSelection) selection).toList(); } return null; } protected void availableWorkingSetsChanged() { viewer.setInput(PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSets()); super.availableWorkingSetsChanged(); } /** * Called when the selection has changed. */ void handleSelectionChanged() { updateButtonAvailability(); } protected void selectAllSets() { viewer.setCheckedElements(PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSets()); updateButtonAvailability(); } protected void deselectAllSets() { viewer.setCheckedElements(new Object[0]); updateButtonAvailability(); } }