Java tutorial
/* * Copyright (c) 2004-2011 Marco Maccaferri 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: * Marco Maccaferri - initial API and implementation */ package org.eclipsetrader.ui.internal.charts.views; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import java.beans.PropertyChangeSupport; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.beans.BeanProperties; import org.eclipse.core.databinding.beans.BeansObservables; import org.eclipse.core.databinding.observable.list.IListChangeListener; import org.eclipse.core.databinding.observable.list.ListChangeEvent; import org.eclipse.core.databinding.observable.list.ListDiffVisitor; import org.eclipse.core.runtime.Platform; import org.eclipse.core.runtime.jobs.IJobChangeEvent; import org.eclipse.core.runtime.jobs.JobChangeAdapter; import org.eclipse.jface.databinding.viewers.ObservableListContentProvider; import org.eclipse.jface.databinding.viewers.ObservableValueEditingSupport; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.viewers.CellNavigationStrategy; import org.eclipse.jface.viewers.ColumnViewer; import org.eclipse.jface.viewers.ColumnViewerEditor; import org.eclipse.jface.viewers.ColumnViewerEditorActivationEvent; import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy; import org.eclipse.jface.viewers.FocusCellOwnerDrawHighlighter; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.jface.viewers.TableViewerEditor; import org.eclipse.jface.viewers.TableViewerFocusCellManager; import org.eclipse.jface.viewers.TextCellEditor; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerCell; import org.eclipse.jface.viewers.ViewerSorter; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.events.KeyAdapter; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.TraverseEvent; import org.eclipse.swt.events.TraverseListener; import org.eclipse.swt.graphics.FontMetrics; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Table; import org.eclipsetrader.core.feed.IHistory; import org.eclipsetrader.core.feed.IOHLC; import org.eclipsetrader.core.feed.TimeSpan; import org.eclipsetrader.core.instruments.ISecurity; import org.eclipsetrader.core.repositories.IPropertyConstants; import org.eclipsetrader.ui.CellEditorValueProperty; import org.eclipsetrader.ui.Util; public class HistoryDataEditor { public static final String PROP_DIRTY = "dirty"; //$NON-NLS-1$ private final HistoryDataEditorModel model; private final DataBindingContext dbc; private TableViewer viewer; private IHistory history; private boolean dirty; private final PropertyChangeSupport changeSupport = new PropertyChangeSupport(this); private final PropertyChangeListener dirtyChangeListener = new PropertyChangeListener() { @Override public void propertyChange(PropertyChangeEvent evt) { changeSupport.firePropertyChange(PROP_DIRTY, dirty, dirty = true); } }; private final IListChangeListener listChangeListener = new IListChangeListener() { @Override public void handleListChange(ListChangeEvent event) { event.diff.accept(new ListDiffVisitor() { @Override public void handleRemove(int index, Object element) { ((HistoryDataElement) element).removePropertyChangeListener(dirtyChangeListener); } @Override public void handleAdd(int index, Object element) { ((HistoryDataElement) element).addPropertyChangeListener(dirtyChangeListener); } }); } }; private final PropertyChangeListener dataChangeListener = new PropertyChangeListener() { @Override public void propertyChange(PropertyChangeEvent evt) { if (IPropertyConstants.BARS.equals(evt.getPropertyName())) { final IOHLC[] newBars = (IOHLC[]) evt.getNewValue(); Display.getDefault().asyncExec(new Runnable() { @Override public void run() { if (viewer.getControl().isDisposed()) { return; } model.merge(newBars); } }); } } }; public HistoryDataEditor(Composite parent) { dbc = new DataBindingContext(); model = new HistoryDataEditorModel(TimeSpan.days(1)); model.getList().addListChangeListener(listChangeListener); createViewer(parent); } public void addPropertyChangeListener(PropertyChangeListener listener) { changeSupport.addPropertyChangeListener(listener); } public void removePropertyChangeListener(PropertyChangeListener listener) { changeSupport.removePropertyChangeListener(listener); } void createViewer(Composite parent) { Table table = new Table(parent, SWT.FULL_SELECTION | SWT.MULTI); table.setHeaderVisible(true); table.setLinesVisible(true); viewer = new TableViewer(table); ObservableListContentProvider contentProvider = new ObservableListContentProvider(); viewer.setContentProvider(contentProvider); GC gc = new GC(parent); FontMetrics fontMetrics = gc.getFontMetrics(); gc.dispose(); TableViewerColumn viewerColumn = new TableViewerColumn(viewer, SWT.NONE); viewerColumn.getColumn().setText(Messages.HistoryDataEditor_Date); viewerColumn.getColumn().setWidth(Dialog.convertHorizontalDLUsToPixels(fontMetrics, 70)); viewerColumn.setEditingSupport(ObservableValueEditingSupport.create(viewer, dbc, new TextCellEditor(table), CellEditorValueProperty.dateValue(), BeanProperties.value(HistoryDataElement.PROP_DATE))); viewerColumn = new TableViewerColumn(viewer, SWT.RIGHT); viewerColumn.getColumn().setText(Messages.HistoryDataEditor_Open); viewerColumn.getColumn().setWidth(Dialog.convertHorizontalDLUsToPixels(fontMetrics, 55)); viewerColumn.setEditingSupport(ObservableValueEditingSupport.create(viewer, dbc, new TextCellEditor(table), CellEditorValueProperty.doubleValue(), BeanProperties.value(HistoryDataElement.PROP_OPEN))); viewerColumn = new TableViewerColumn(viewer, SWT.RIGHT); viewerColumn.getColumn().setText(Messages.HistoryDataEditor_High); viewerColumn.getColumn().setWidth(Dialog.convertHorizontalDLUsToPixels(fontMetrics, 55)); viewerColumn.setEditingSupport(ObservableValueEditingSupport.create(viewer, dbc, new TextCellEditor(table), CellEditorValueProperty.doubleValue(), BeanProperties.value(HistoryDataElement.PROP_HIGH))); viewerColumn = new TableViewerColumn(viewer, SWT.RIGHT); viewerColumn.getColumn().setText(Messages.HistoryDataEditor_Low); viewerColumn.getColumn().setWidth(Dialog.convertHorizontalDLUsToPixels(fontMetrics, 55)); viewerColumn.setEditingSupport(ObservableValueEditingSupport.create(viewer, dbc, new TextCellEditor(table), CellEditorValueProperty.doubleValue(), BeanProperties.value(HistoryDataElement.PROP_LOW))); viewerColumn = new TableViewerColumn(viewer, SWT.RIGHT); viewerColumn.getColumn().setText(Messages.HistoryDataEditor_Close); viewerColumn.getColumn().setWidth(Dialog.convertHorizontalDLUsToPixels(fontMetrics, 55)); viewerColumn.setEditingSupport(ObservableValueEditingSupport.create(viewer, dbc, new TextCellEditor(table), CellEditorValueProperty.doubleValue(), BeanProperties.value(HistoryDataElement.PROP_CLOSE))); viewerColumn = new TableViewerColumn(viewer, SWT.RIGHT); viewerColumn.getColumn().setText(Messages.HistoryDataEditor_Volume); viewerColumn.getColumn().setWidth(Dialog.convertHorizontalDLUsToPixels(fontMetrics, 70)); viewerColumn.setEditingSupport(ObservableValueEditingSupport.create(viewer, dbc, new TextCellEditor(table), CellEditorValueProperty.longValue(), BeanProperties.value(HistoryDataElement.PROP_VOLUME))); if (Platform.WS_GTK.equals(Platform.getWS())) { viewerColumn = new TableViewerColumn(viewer, SWT.RIGHT); viewerColumn.getColumn().setWidth(1); } final String[] properties = new String[] { HistoryDataElement.PROP_DATE, HistoryDataElement.PROP_OPEN, HistoryDataElement.PROP_HIGH, HistoryDataElement.PROP_LOW, HistoryDataElement.PROP_CLOSE, HistoryDataElement.PROP_VOLUME, "" //$NON-NLS-1$ }; DataViewerLabelProvider labelProvider = new DataViewerLabelProvider( BeansObservables.observeMaps(contentProvider.getKnownElements(), properties)); labelProvider.setDateFormat(Util.getDateFormat()); viewer.setLabelProvider(labelProvider); viewer.setSorter(new ViewerSorter() { @Override public int compare(Viewer viewer, Object o1, Object o2) { HistoryDataElement e1 = (HistoryDataElement) o1; HistoryDataElement e2 = (HistoryDataElement) o2; if (e1.getDate() != null && e2.getDate() != null) { return e1.getDate().compareTo(e2.getDate()); } if (e1.getDate() != null && e2.getDate() == null) { return -1; } if (e1.getDate() == null && e2.getDate() != null) { return 1; } return 0; } }); CellNavigationStrategy naviStrat = new CellNavigationStrategy() { @Override public ViewerCell findSelectedCell(ColumnViewer viewer, ViewerCell currentSelectedCell, Event event) { ViewerCell cell = super.findSelectedCell(viewer, currentSelectedCell, event); if (cell != null) { if (cell.getColumnIndex() == properties.length - 1) { return null; } Table table = ((TableViewer) viewer).getTable(); table.showColumn(table.getColumn(cell.getColumnIndex())); } return cell; } }; TableViewerFocusCellManager focusCellManager = new TableViewerFocusCellManager(viewer, new FocusCellOwnerDrawHighlighter(viewer), naviStrat); ColumnViewerEditorActivationStrategy activationStrategy = new ColumnViewerEditorActivationStrategy(viewer) { @Override protected boolean isEditorActivationEvent(ColumnViewerEditorActivationEvent event) { return event.eventType == ColumnViewerEditorActivationEvent.TRAVERSAL || (event.eventType == ColumnViewerEditorActivationEvent.KEY_PRESSED && event.keyCode == SWT.CR) || event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC; } }; TableViewerEditor.create(viewer, focusCellManager, activationStrategy, ColumnViewerEditor.TABBING_HORIZONTAL | ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR | ColumnViewerEditor.TABBING_VERTICAL | ColumnViewerEditor.KEYBOARD_ACTIVATION); table.addTraverseListener(new TraverseListener() { @Override public void keyTraversed(TraverseEvent e) { if (e.detail == SWT.TRAVERSE_RETURN || e.detail == SWT.TRAVERSE_ESCAPE) { e.doit = false; } } }); table.addKeyListener(new KeyAdapter() { @Override public void keyPressed(KeyEvent e) { if (viewer.isCellEditorActive()) { return; } if (e.keyCode == SWT.INSERT) { IStructuredSelection selection = (IStructuredSelection) viewer.getSelection(); int index = 0; if (!selection.isEmpty()) { index = model.getList().indexOf(selection.getFirstElement()); if (index == -1) { index = model.getList().size(); } } final HistoryDataElement element = new HistoryDataElement(); model.getList().add(index, element); e.doit = false; Display.getDefault().asyncExec(new Runnable() { @Override public void run() { if (!viewer.getControl().isDisposed()) { viewer.editElement(element, 0); } } }); } else if (e.character == SWT.DEL) { IStructuredSelection selection = (IStructuredSelection) viewer.getSelection(); if (model.getList().removeAll(selection.toList())) { changeSupport.firePropertyChange(PROP_DIRTY, dirty, dirty = true); } } } }); viewer.setInput(model.getList()); } public void load(ISecurity security) { if (history != null) { PropertyChangeSupport propertyChangeSupport = (PropertyChangeSupport) history .getAdapter(PropertyChangeSupport.class); if (propertyChangeSupport != null) { propertyChangeSupport.removePropertyChangeListener(dataChangeListener); } } ChartLoadJob job = new ChartLoadJob(security); job.addJobChangeListener(new JobChangeAdapter() { @Override public void done(IJobChangeEvent event) { ChartLoadJob job = (ChartLoadJob) event.getJob(); history = job.getHistory(); Display.getDefault().asyncExec(new Runnable() { @Override public void run() { model.set(history.getOHLC()); PropertyChangeSupport propertyChangeSupport = (PropertyChangeSupport) history .getAdapter(PropertyChangeSupport.class); if (propertyChangeSupport != null) { propertyChangeSupport.addPropertyChangeListener(dataChangeListener); } } }); } }); job.setResolutionTimeSpan(TimeSpan.days(1)); job.setName(NLS.bind(Messages.HistoryDataEditor_LoadingHistory, new Object[] { security.getName() })); job.setUser(true); job.schedule(); } public Control getControl() { return viewer.getControl(); } public boolean isDirty() { return dirty; } public void setDirty(boolean dirty) { this.dirty = dirty; } public HistoryDataEditorModel getModel() { return model; } public TableViewer getViewer() { return viewer; } public IHistory getHistory() { return history; } public void dispose() { if (history != null) { PropertyChangeSupport propertyChangeSupport = (PropertyChangeSupport) history .getAdapter(PropertyChangeSupport.class); if (propertyChangeSupport != null) { propertyChangeSupport.removePropertyChangeListener(dataChangeListener); } } PropertyChangeListener[] listeners = changeSupport.getPropertyChangeListeners(); for (int i = 0; i < listeners.length; i++) { changeSupport.removePropertyChangeListener(listeners[i]); } viewer.getControl().dispose(); model.getList().removeListChangeListener(listChangeListener); model.dispose(); dbc.dispose(); } }