Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2007 Mylyn project committers 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 *******************************************************************************/ package at.rc.tacos.client.ui.custom; import java.text.DateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.List; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.ISelectionProvider; import org.eclipse.jface.viewers.ListViewer; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.KeyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.DateTime; /** * The DatePickerPanel from the eclipse mylin projekt. * * @author Bahadir Yagan * @author Mik Kersten * @author Rob Elves */ public class DatePickerPanel extends Composite implements KeyListener, ISelectionProvider { private org.eclipse.swt.widgets.List timeList = null; private ISelection selection = null; private Calendar date = null; private DateTime calendar = null; private List<ISelectionChangedListener> selectionListeners = new ArrayList<ISelectionChangedListener>(); public DatePickerPanel(Composite parent, int style, Calendar initialDate) { super(parent, style); this.date = initialDate; initialize(); setDate(date); } private void initialize() { if (date == null) { date = Calendar.getInstance(); date.set(Calendar.HOUR_OF_DAY, 0); date.set(Calendar.MINUTE, 0); date.set(Calendar.SECOND, 0); date.set(Calendar.MILLISECOND, 0); } GridLayout gridLayout = new GridLayout(); gridLayout.numColumns = 2; this.setLayout(gridLayout); calendar = new DateTime(this, SWT.CALENDAR); calendar.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { date.set(Calendar.YEAR, calendar.getYear()); date.set(Calendar.MONTH, calendar.getMonth()); date.set(Calendar.DAY_OF_MONTH, calendar.getDay()); setSelection(new DateSelection(date)); notifyListeners(new SelectionChangedEvent(DatePickerPanel.this, getSelection())); } }); createTimeList(this); } /** * This method initializes the month combo */ private void createTimeList(Composite composite) { DateFormat dateFormat = DateFormat.getTimeInstance(DateFormat.SHORT); Calendar tempCalendar = Calendar.getInstance(); tempCalendar.set(Calendar.MINUTE, 0); tempCalendar.set(Calendar.SECOND, 0); String[] times = new String[48]; int pos = 0; for (int x = 0; x < 24; x++) { // hour tempCalendar.set(Calendar.MINUTE, 0); tempCalendar.set(Calendar.HOUR_OF_DAY, x); times[pos] = dateFormat.format(tempCalendar.getTime()); // count up the position for the minute pos++; // minute tempCalendar.set(Calendar.MINUTE, 30); times[pos] = dateFormat.format(tempCalendar.getTime()); // count up the position for the hour pos++; } ListViewer listViewer = new ListViewer(composite); listViewer.setContentProvider(new ArrayContentProvider()); listViewer.setInput(times); timeList = listViewer.getList(); listViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { // even index -> just hour if (timeList.getSelectionIndex() % 2 == 0) { date.set(Calendar.HOUR_OF_DAY, timeList.getSelectionIndex() / 2); date.set(Calendar.MINUTE, 0); } else { date.set(Calendar.HOUR_OF_DAY, timeList.getSelectionIndex() / 2); date.set(Calendar.MINUTE, 30); } setSelection(new DateSelection(date)); notifyListeners(new SelectionChangedEvent(DatePickerPanel.this, getSelection())); } }); GridDataFactory.fillDefaults().hint(SWT.DEFAULT, 150).grab(false, true).applyTo(timeList); if (date != null) { // if we have a minute -> select it if (date.get(Calendar.MINUTE) > 0) listViewer.setSelection(new StructuredSelection(times[date.get(Calendar.HOUR_OF_DAY) + 1]), true); else listViewer.setSelection(new StructuredSelection(times[date.get(Calendar.HOUR_OF_DAY)]), true); } else { listViewer.setSelection(new StructuredSelection(times[8]), true); } timeList.addKeyListener(this); } public void setDate(Calendar date) { this.date = date; calendar.setYear(date.get(Calendar.YEAR)); calendar.setMonth(date.get(Calendar.MONTH)); calendar.setDay(date.get(Calendar.DAY_OF_MONTH)); } public void keyPressed(KeyEvent e) { if (e.keyCode == SWT.ESC) { SelectionChangedEvent changeEvent = new SelectionChangedEvent(this, new ISelection() { public boolean isEmpty() { return true; } }); notifyListeners(changeEvent); } } public void keyReleased(KeyEvent e) { } private void notifyListeners(SelectionChangedEvent event) { for (ISelectionChangedListener listener : selectionListeners) { listener.selectionChanged(event); } } public void addSelectionChangedListener(ISelectionChangedListener listener) { selectionListeners.add(listener); } public ISelection getSelection() { return selection; } public void removeSelectionChangedListener(ISelectionChangedListener listener) { selectionListeners.remove(listener); } public void setSelection(ISelection selection) { this.selection = selection; } public class DateSelection implements ISelection { private Calendar date; public DateSelection(Calendar calendar) { date = calendar; } public boolean isEmpty() { return date == null; } public Calendar getDate() { return date; } } }