Java tutorial
/******************************************************************************* * Copyright (c) 2005-2008 Polarion Software. * 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: * Alexander Gurov - Initial API and implementation *******************************************************************************/ package org.eclipse.team.svn.ui.panel; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.Iterator; import java.util.List; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.IBaseLabelProvider; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableLayout; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; 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.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.team.svn.ui.SVNUIMessages; import org.eclipse.team.svn.ui.dialog.DefaultDialog; /** * List selection panel implementation * * @author Alexander Gurov */ public class ListSelectionPanel extends AbstractDialogPanel { protected Object inputElement; protected IBaseLabelProvider labelProvider; protected IStructuredContentProvider contentProvider; protected List initialSelections; protected List initialGrayed; protected Object[] resultSelections; protected boolean multipleColumns; protected CheckboxTableViewer listViewer; public ListSelectionPanel(Object input, IStructuredContentProvider contentProvider, IBaseLabelProvider labelProvider, String description, String defaultMessage) { this(input, contentProvider, labelProvider, description, defaultMessage, SVNUIMessages.ListSelectionPanel_Title, false); } public ListSelectionPanel(Object input, IStructuredContentProvider contentProvider, IBaseLabelProvider labelProvider, String description, String defaultMessage, String title, boolean multipleColumns) { super(); this.initialSelections = Collections.EMPTY_LIST; this.initialGrayed = Collections.EMPTY_LIST; this.dialogTitle = title; this.inputElement = input; this.contentProvider = contentProvider; this.labelProvider = labelProvider; this.dialogDescription = description; this.defaultMessage = defaultMessage; this.multipleColumns = multipleColumns; } public void createControlsImpl(Composite parent) { this.listViewer = this.createViewer(parent); GridData data = new GridData(GridData.FILL_BOTH); data.heightHint = 120; this.listViewer.getTable().setLayoutData(data); this.listViewer.setLabelProvider(this.labelProvider); this.listViewer.setContentProvider(this.contentProvider); this.listViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { ListSelectionPanel.this.validateContent(); } }); Composite tComposite = new Composite(parent, SWT.RIGHT); GridLayout gLayout = new GridLayout(); gLayout.numColumns = 2; gLayout.marginWidth = 0; tComposite.setLayout(gLayout); data = new GridData(GridData.HORIZONTAL_ALIGN_END | GridData.GRAB_HORIZONTAL); data.grabExcessHorizontalSpace = true; tComposite.setData(data); Button selectButton = new Button(tComposite, SWT.PUSH); selectButton.setText(SVNUIMessages.Button_SelectAll); data = new GridData(); data.widthHint = DefaultDialog.computeButtonWidth(selectButton); selectButton.setLayoutData(data); SelectionListener listener = new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { ListSelectionPanel.this.listViewer.setAllChecked(true); ListSelectionPanel.this.validateContent(); } }; selectButton.addSelectionListener(listener); Button deselectButton = new Button(tComposite, SWT.PUSH); deselectButton.setText(SVNUIMessages.Button_ClearSelection); data = new GridData(); data.widthHint = DefaultDialog.computeButtonWidth(deselectButton); deselectButton.setLayoutData(data); listener = new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { ListSelectionPanel.this.listViewer.setAllChecked(false); ListSelectionPanel.this.validateContent(); } }; deselectButton.addSelectionListener(listener); } public void postInit() { this.listViewer.setInput(this.inputElement); for (Iterator it = this.initialSelections.iterator(); it.hasNext();) { this.listViewer.setChecked(it.next(), true); } for (Iterator it = this.initialGrayed.iterator(); it.hasNext();) { this.listViewer.setGrayed(it.next(), true); } super.postInit(); } public Object[] getResultSelections() { return this.resultSelections; } public Object[] getInitialSelections() { return this.initialSelections.toArray(); } public void setInitialSelections(Object[] selectedElements) { this.initialSelections = Arrays.asList(selectedElements); } public void setInitialGrayed(Object[] grayedElements) { this.initialGrayed = Arrays.asList(grayedElements); } protected CheckboxTableViewer createViewer(Composite parent) { if (!this.multipleColumns) { return CheckboxTableViewer.newCheckList(parent, SWT.BORDER); } Table table = new Table(parent, SWT.CHECK | SWT.BORDER); table.setLinesVisible(true); GridData data = new GridData(GridData.FILL_BOTH); table.setLayoutData(data); TableLayout layout = new TableLayout(); table.setLayout(layout); // resource name TableColumn col = new TableColumn(table, SWT.NONE); col.setResizable(true); col.setText(SVNUIMessages.ListSelectionPanel_Resource); layout.addColumnData(new ColumnWeightData(60, true)); // local presentation col = new TableColumn(table, SWT.NONE); col.setResizable(true); col.setText(SVNUIMessages.ListSelectionPanel_LocalPresentation); layout.addColumnData(new ColumnWeightData(40, true)); return new CheckboxTableViewer(table); } protected void saveChangesImpl() { Object[] children = this.contentProvider.getElements(this.inputElement); if (children != null) { ArrayList list = new ArrayList(); for (int i = 0; i < children.length; i++) { if (this.listViewer.getChecked(children[i])) { list.add(children[i]); } } this.resultSelections = list.toArray(); } } protected void cancelChangesImpl() { } }