Java tutorial
/* * Copyright (c) 2012 Data Harmonisation Panel * * All rights reserved. This program and the accompanying materials are made * available under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * You should have received a copy of the GNU Lesser General Public License * along with this distribution. If not, see <http://www.gnu.org/licenses/>. * * Contributors: * HUMBOLDT EU Integrated Project #030962 * Data Harmonisation Panel <http://www.dhpanel.eu> */ package eu.esdihumboldt.hale.ui.views.data.internal.explore; import java.util.ArrayList; import java.util.Collections; import java.util.List; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.layout.TreeColumnLayout; import org.eclipse.jface.viewers.ColumnViewerToolTipSupport; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.ISelectionProvider; import org.eclipse.jface.viewers.TreeColumnViewerLabelProvider; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.TreeViewerColumn; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerCell; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.TreeEditor; import org.eclipse.swt.dnd.Clipboard; import org.eclipse.swt.dnd.TextTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.events.MouseMoveListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.TreeItem; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.PlatformUI; import com.google.common.collect.Iterables; import eu.esdihumboldt.hale.common.instance.model.Instance; import eu.esdihumboldt.hale.common.schema.SchemaSpaceID; import eu.esdihumboldt.hale.common.schema.model.TypeDefinition; import eu.esdihumboldt.hale.ui.util.viewer.PairLabelProvider; import eu.esdihumboldt.hale.ui.views.data.InstanceViewer; import eu.esdihumboldt.hale.ui.views.data.internal.MetadataActionProvider; import eu.esdihumboldt.hale.ui.views.data.internal.SimpleInstanceSelectionProvider; import eu.esdihumboldt.util.Pair; /** * Instance explorer * * @author Simon Templer */ public class InstanceExplorer implements InstanceViewer { private final SimpleInstanceSelectionProvider selectionProvider = new SimpleInstanceSelectionProvider(); private Composite selectorComposite; private Composite main; private TreeViewer viewer; private TreeEditor editor; private List<Instance> instances = new ArrayList<Instance>(); private final List<Control> selectButtons = new ArrayList<Control>(); private int selectedIndex = 0; // private static ALogger _log = // ALoggerFactory.getLogger(InstanceExplorer.class); private final SelectionListener selectListener = new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { int index = 0; for (Control button : selectButtons) { if (button instanceof Button && ((Button) button).getSelection()) { selectedIndex = index; updateSelection(); return; } index++; } } }; /** * @see InstanceViewer#createControls(Composite, SchemaSpaceID) */ @Override public void createControls(Composite parent, SchemaSpaceID schemaSpace) { main = new Composite(parent, SWT.NONE); main.setLayout(GridLayoutFactory.fillDefaults().numColumns(1).create()); // selector composite selectorComposite = new Composite(main, SWT.NONE); selectorComposite.setLayoutData(GridDataFactory.swtDefaults().create()); selectorComposite.setLayout(GridLayoutFactory.fillDefaults().create()); // viewer composite Composite viewerComposite = new Composite(main, SWT.NONE); viewerComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create()); TreeColumnLayout layout = new TreeColumnLayout(); viewerComposite.setLayout(layout); viewer = new TreeViewer(viewerComposite, SWT.SINGLE | SWT.FULL_SELECTION | SWT.BORDER); viewer.getTree().setLinesVisible(true); // set content provider viewer.setContentProvider(new InstanceContentProvider()); viewer.setAutoExpandLevel(TreeViewer.ALL_LEVELS); // TODO set label provider? // add definition columns TreeViewerColumn column = new TreeViewerColumn(viewer, SWT.LEFT); column.getColumn().setText("Definition"); column.setLabelProvider(new TreeColumnViewerLabelProvider( new PairLabelProvider(true, new DefinitionMetaLabelProvider(false, true)))); layout.setColumnData(column.getColumn(), new ColumnWeightData(1)); // add value column column = new TreeViewerColumn(viewer, SWT.LEFT); column.getColumn().setText("Value"); final InstanceValueLabelProvider instanceLabelProvider = new InstanceValueLabelProvider(); column.setLabelProvider(instanceLabelProvider); // new PairLabelProvider(false, new LabelProvider()))); ColumnViewerToolTipSupport.enableFor(viewer); layout.setColumnData(column.getColumn(), new ColumnWeightData(1)); MetadataActionProvider maep = new MetadataExploreActionProvider(viewer); maep.setup(); // Add an editor for copying instance values editor = new TreeEditor(viewer.getTree()); editor.horizontalAlignment = SWT.RIGHT; viewer.getTree().addMouseMoveListener(new MouseMoveListener() { @Override public void mouseMove(MouseEvent e) { final ViewerCell cell = viewer.getCell(new Point(e.x, e.y)); // Selected cell changed? if (cell == null || editor.getItem() != cell.getItem() || editor.getColumn() != cell.getColumnIndex()) { // Clean up any previous editor control Control oldEditor = editor.getEditor(); if (oldEditor != null) { oldEditor.dispose(); editor.setEditor(null, null, 0); } } // No valid selected cell if (cell == null || cell.getColumnIndex() == 0) { return; } // cell didn't change if ((editor.getItem() == cell.getItem() && editor.getColumn() == cell.getColumnIndex())) { return; } // determine instance value Object value = ((Pair<?, ?>) cell.getViewerRow().getTreePath().getLastSegment()).getSecond(); if (value instanceof Instance) { value = ((Instance) value).getValue(); } // copy button if (value != null) { final String textValue = value.toString(); if (!textValue.isEmpty()) { // empty string invalid for // clipboard Button button = new Button(viewer.getTree(), SWT.PUSH | SWT.FLAT); button.setImage( PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_TOOL_COPY)); button.setToolTipText("Copy string value"); button.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { // copy content to clipboard Clipboard clipBoard = new Clipboard(Display.getCurrent()); clipBoard.setContents(new Object[] { textValue }, new Transfer[] { TextTransfer.getInstance() }); clipBoard.dispose(); } }); // calculate editor size Point size = button.computeSize(SWT.DEFAULT, SWT.DEFAULT); editor.minimumHeight = size.y; editor.minimumWidth = size.x; editor.setEditor(button, (TreeItem) cell.getItem(), cell.getColumnIndex()); } } } }); update(); } /** * Update the controls. */ private void update() { // dispose old selector buttons for (Control button : selectButtons) { button.dispose(); } selectButtons.clear(); selectorComposite.setLayout(GridLayoutFactory.swtDefaults() .numColumns((instances.isEmpty()) ? (1) : (instances.size())).margins(3, 0).create()); // create new buttons for each instance for (int index = 0; index < instances.size(); index++) { Button button = new Button(selectorComposite, SWT.RADIO); button.setText("#" + (index + 1)); button.setSelection(selectedIndex == index); button.addSelectionListener(selectListener); selectButtons.add(button); } if (selectButtons.isEmpty()) { Label none = new Label(selectorComposite, SWT.NONE); none.setText("No matching instances available"); selectButtons.add(none); } if (selectedIndex >= selectButtons.size()) { selectedIndex = 0; if (!selectButtons.isEmpty()) { Control c1 = selectButtons.get(0); if (c1 instanceof Button) { ((Button) c1).setSelection(true); } } } // both layout steps needed selectorComposite.layout(); selectorComposite.getParent().layout(); updateSelection(); } /** * Update the viewer according to the current selection. */ private void updateSelection() { if (selectedIndex < instances.size()) { Instance instance = instances.get(selectedIndex); viewer.setInput(instance); selectionProvider.updateSelection(Collections.singleton(instance)); } else { viewer.setInput(null); selectionProvider.updateSelection(null); } } /** * @see InstanceViewer#setInput(TypeDefinition, Iterable) */ @Override public void setInput(TypeDefinition type, Iterable<Instance> instances) { List<Instance> instanceList = new ArrayList<Instance>(); if (instances != null) { Iterables.addAll(instanceList, instances); } this.instances = instanceList; update(); } /** * @see InstanceViewer#getViewer() */ @Override public Viewer getViewer() { return viewer; } /** * @see InstanceViewer#getControl() */ @Override public Control getControl() { return main; } /** * @see InstanceViewer#getInstanceSelectionProvider() */ @Override public ISelectionProvider getInstanceSelectionProvider() { return selectionProvider; } }