org.eclipse.mylyn.commons.ui/src/org/eclipse/mylyn/internal/provisional/commons/ui/DatePicker.java - mylyn/org.eclipse.mylyn.commons - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004, 2008 Tasktop Technologies 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:
  *     Tasktop Technologies - initial API and implementation
  *******************************************************************************/

 package org.eclipse.mylyn.internal.provisional.commons.ui;

 import java.text.DateFormat;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.LinkedList;
 import java.util.List;

 import org.eclipse.jface.window.Window;
 import org.eclipse.mylyn.internal.commons.ui.Messages;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.FocusAdapter;
 import org.eclipse.swt.events.FocusEvent;
 import org.eclipse.swt.events.KeyAdapter;
 import org.eclipse.swt.events.KeyEvent;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 import org.eclipse.swt.graphics.Color;
 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.Shell;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.PlatformUI;

 /**
  * Temporary date picker from patch posted to: https://bugs.eclipse.org/bugs/show_bug.cgi?taskId=19945
  *
  * see bug# 19945
  *
  * TODO: remove this class when an SWT date picker is added
  *
  * @author Bahadir Yagan
  * @author Mik Kersten
  * @since 1.0
  */
 public class DatePicker extends Composite {

 	public final static String TITLE_DIALOG = Messages.DatePicker_Choose_Date;

 	public static final String LABEL_CHOOSE = Messages.DatePicker_Choose_Date;

 	private Text dateText;

 	private Button pickButton;

 	private Calendar date;

 	private final List<SelectionListener> pickerListeners = new LinkedList<SelectionListener>();

 	private DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT);

 	private String initialText = LABEL_CHOOSE;

 	private final boolean includeTimeOfday;

 	private final int hourOfDay = 0;

 	private int selectedHourOfDay = 0;

 	public DatePicker(Composite parent, int style, String initialText, boolean includeHours, int selectedHourOfDay) {
 		super(parent, style);
 		this.initialText = initialText;
 		this.includeTimeOfday = includeHours;
 		this.selectedHourOfDay = selectedHourOfDay;
 		initialize((style & SWT.FLAT) != 0 ? SWT.FLAT : 0);
 	}

 	public DateFormat getDateFormat() {
 		return dateFormat;
 	}

 	public void setDatePattern(String pattern) {
 		this.dateFormat = new SimpleDateFormat(pattern);
 	}

 	public void setDateFormat(DateFormat dateFormat) {
 		this.dateFormat = dateFormat;
 	}

 	private void initialize(int style) {
 		GridLayout gridLayout = new GridLayout(2, false);
 		gridLayout.horizontalSpacing = 0;
 		gridLayout.verticalSpacing = 0;
 		gridLayout.marginWidth = 0;
 		gridLayout.marginHeight = 0;
 		this.setLayout(gridLayout);

 		dateText = new Text(this, style);
 		GridData dateTextGridData = new GridData(SWT.FILL, SWT.FILL, false, false);
 		dateTextGridData.grabExcessHorizontalSpace = true;
 		dateTextGridData.verticalAlignment = SWT.FILL;

 		dateText.setLayoutData(dateTextGridData);
 		dateText.setText(initialText);
 		dateText.addKeyListener(new KeyAdapter() {
 			@Override
 			public void keyPressed(KeyEvent e) {
 				// key listener used because setting of date picker text causes
 				// modify listener to fire which results in perpetual dirty
 				// editor
 				notifyPickerListeners();
 			}
 		});

 		dateText.addFocusListener(new FocusAdapter() {
 			Calendar calendar = Calendar.getInstance();

 			@Override
 			public void focusLost(FocusEvent e) {
 				Date reminderDate;
 				try {
 					reminderDate = dateFormat.parse(dateText.getText());
 					calendar.setTime(reminderDate);
 					date = calendar;
 					updateDateText();
 				} catch (ParseException e1) {
 					updateDateText();
 				}

 			}
 		});

 		pickButton = new Button(this, style | SWT.ARROW | SWT.DOWN);
 		GridData pickButtonGridData = new GridData(SWT.RIGHT, SWT.FILL, false, true);
 		pickButtonGridData.verticalIndent = 0;
 		pickButton.setLayoutData(pickButtonGridData);
 		pickButton.addSelectionListener(new SelectionAdapter() {

 			@Override
 			public void widgetSelected(SelectionEvent arg0) {
 				Calendar newCalendar = Calendar.getInstance();
 				newCalendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
 				newCalendar.set(Calendar.MINUTE, 0);
 				newCalendar.set(Calendar.SECOND, 0);
 				newCalendar.set(Calendar.MILLISECOND, 0);
 				if (date != null) {
 					newCalendar.setTime(date.getTime());
 				}

 				Shell shell = null;
 				if (PlatformUI.getWorkbench().getActiveWorkbenchWindow() != null) {
 					shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
 				} else {
 					shell = new Shell(PlatformUI.getWorkbench().getDisplay());
 				}
 				DateSelectionDialog dialog = new DateSelectionDialog(shell, newCalendar, DatePicker.TITLE_DIALOG,
 						includeTimeOfday, selectedHourOfDay);
 				pickButton.setEnabled(false);
 				dateText.setEnabled(false);

 				int dialogResponse = dialog.open();
 				if (dialog.getDate() != null) {
 					newCalendar.setTime(dialog.getDate());
 				} else {
 					newCalendar = null;
 				}
 				dateSelected(dialogResponse == Window.CANCEL, newCalendar);

 				// Display display = Display.getCurrent();
 				// showDatePicker((display.getCursorLocation().x),
 				// (display.getCursorLocation().y));
 			}
 		});

 		pack();
 	}

 	public void addPickerSelectionListener(SelectionListener listener) {
 		pickerListeners.add(listener);
 	}

 	/**
 	 * must check for null return value
 	 *
 	 * @return Calendar
 	 */
 	public Calendar getDate() {
 		return date;
 	}

 	@Override
 	public void setBackground(Color backgroundColor) {
 		dateText.setBackground(backgroundColor);
 		pickButton.setBackground(backgroundColor);
 		super.setBackground(backgroundColor);
 	}

 	public void setDate(Calendar date) {
 		this.date = date;
 		updateDateText();
 	}

 	// private void showDatePicker(int x, int y) {
 	// pickerShell = new Shell(SWT.APPLICATION_MODAL);//| SWT.ON_TOP
 	// pickerShell.setText("Shell");
 	// pickerShell.setLayout(new FillLayout());
 	// if (date == null) {
 	// date = new GregorianCalendar();
 	// }
 	// // datePickerPanel.setDate(date);
 	// datePickerPanel = new DatePickerPanel(pickerShell, SWT.NONE, date);
 	// datePickerPanel.addSelectionChangedListener(new
 	// ISelectionChangedListener() {
 	//
 	// public void selectionChanged(SelectionChangedEvent event) {
 	// if(!event.getSelection().isEmpty()) {
 	// dateSelected(event.getSelection().isEmpty(),
 	// ((DateSelection)event.getSelection()).getDate());
 	// } else {
 	// dateSelected(false, null);
 	// }
 	// }});
 	//
 	// pickerShell.setSize(new Point(240, 180));
 	// pickerShell.setLocation(new Point(x, y));
 	//
 	// datePickerPanel.addKeyListener(new KeyListener() {
 	// public void keyPressed(KeyEvent e) {
 	// if (e.keyCode == SWT.ESC) {
 	// dateSelected(true, null);
 	// }
 	// }
 	//
 	// public void keyReleased(KeyEvent e) {
 	// }
 	// });
 	//
 	// pickerShell.addFocusListener(new FocusListener() {
 	//
 	// public void focusGained(FocusEvent e) {
 	//
 	// }
 	//
 	// public void focusLost(FocusEvent e) {
 	//
 	// }});
 	//
 	// pickerShell.pack();
 	// pickerShell.open();
 	// }

 	/** Called when the user has selected a date */
 	protected void dateSelected(boolean canceled, Calendar selectedDate) {

 		if (!canceled) {
 			this.date = selectedDate != null ? selectedDate : null;
 			updateDateText();
 			notifyPickerListeners();
 		}

 		pickButton.setEnabled(true);
 		dateText.setEnabled(true);
 	}

 	private void notifyPickerListeners() {
 		for (SelectionListener listener : pickerListeners) {
 			listener.widgetSelected(null);
 		}
 	}

 	private void updateDateText() {
 		if (date != null) {
 			Date currentDate = new Date(date.getTimeInMillis());
 			dateText.setText(dateFormat.format(currentDate));
 		} else {
 			dateText.setEnabled(false);
 			dateText.setText(LABEL_CHOOSE);
 			dateText.setEnabled(true);
 		}
 	}

 	@Override
 	public void setEnabled(boolean enabled) {
 		dateText.setEnabled(enabled);
 		pickButton.setEnabled(enabled);
 		super.setEnabled(enabled);
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2004, 2008 Tasktop Technologies 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:
	* Tasktop Technologies - initial API and implementation
	*******************************************************************************/

	package org.eclipse.mylyn.internal.provisional.commons.ui;

	import java.text.DateFormat;
	import java.text.ParseException;
	import java.text.SimpleDateFormat;
	import java.util.Calendar;
	import java.util.Date;
	import java.util.LinkedList;
	import java.util.List;

	import org.eclipse.jface.window.Window;
	import org.eclipse.mylyn.internal.commons.ui.Messages;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.FocusAdapter;
	import org.eclipse.swt.events.FocusEvent;
	import org.eclipse.swt.events.KeyAdapter;
	import org.eclipse.swt.events.KeyEvent;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	import org.eclipse.swt.graphics.Color;
	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.Shell;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.PlatformUI;

	/**
	* Temporary date picker from patch posted to: https://bugs.eclipse.org/bugs/show_bug.cgi?taskId=19945
	*
	* see bug# 19945
	*
	* TODO: remove this class when an SWT date picker is added
	*
	* @author Bahadir Yagan
	* @author Mik Kersten
	* @since 1.0
	*/
	public class DatePicker extends Composite {

	public final static String TITLE_DIALOG = Messages.DatePicker_Choose_Date;

	public static final String LABEL_CHOOSE = Messages.DatePicker_Choose_Date;

	private Text dateText;

	private Button pickButton;

	private Calendar date;

	private final List<SelectionListener> pickerListeners = new LinkedList<SelectionListener>();

	private DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT);

	private String initialText = LABEL_CHOOSE;

	private final boolean includeTimeOfday;

	private final int hourOfDay = 0;

	private int selectedHourOfDay = 0;

	public DatePicker(Composite parent, int style, String initialText, boolean includeHours, int selectedHourOfDay) {
	super(parent, style);
	this.initialText = initialText;
	this.includeTimeOfday = includeHours;
	this.selectedHourOfDay = selectedHourOfDay;
	initialize((style & SWT.FLAT) != 0 ? SWT.FLAT : 0);
	}

	public DateFormat getDateFormat() {
	return dateFormat;
	}

	public void setDatePattern(String pattern) {
	this.dateFormat = new SimpleDateFormat(pattern);
	}

	public void setDateFormat(DateFormat dateFormat) {
	this.dateFormat = dateFormat;
	}

	private void initialize(int style) {
	GridLayout gridLayout = new GridLayout(2, false);
	gridLayout.horizontalSpacing = 0;
	gridLayout.verticalSpacing = 0;
	gridLayout.marginWidth = 0;
	gridLayout.marginHeight = 0;
	this.setLayout(gridLayout);

	dateText = new Text(this, style);
	GridData dateTextGridData = new GridData(SWT.FILL, SWT.FILL, false, false);
	dateTextGridData.grabExcessHorizontalSpace = true;
	dateTextGridData.verticalAlignment = SWT.FILL;

	dateText.setLayoutData(dateTextGridData);
	dateText.setText(initialText);
	dateText.addKeyListener(new KeyAdapter() {
	@Override
	public void keyPressed(KeyEvent e) {
	// key listener used because setting of date picker text causes
	// modify listener to fire which results in perpetual dirty
	// editor
	notifyPickerListeners();
	}
	});

	dateText.addFocusListener(new FocusAdapter() {
	Calendar calendar = Calendar.getInstance();

	@Override
	public void focusLost(FocusEvent e) {
	Date reminderDate;
	try {
	reminderDate = dateFormat.parse(dateText.getText());
	calendar.setTime(reminderDate);
	date = calendar;
	updateDateText();
	} catch (ParseException e1) {
	updateDateText();
	}

	}
	});

	pickButton = new Button(this, style \| SWT.ARROW \| SWT.DOWN);
	GridData pickButtonGridData = new GridData(SWT.RIGHT, SWT.FILL, false, true);
	pickButtonGridData.verticalIndent = 0;
	pickButton.setLayoutData(pickButtonGridData);
	pickButton.addSelectionListener(new SelectionAdapter() {

	@Override
	public void widgetSelected(SelectionEvent arg0) {
	Calendar newCalendar = Calendar.getInstance();
	newCalendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
	newCalendar.set(Calendar.MINUTE, 0);
	newCalendar.set(Calendar.SECOND, 0);
	newCalendar.set(Calendar.MILLISECOND, 0);
	if (date != null) {
	newCalendar.setTime(date.getTime());
	}

	Shell shell = null;
	if (PlatformUI.getWorkbench().getActiveWorkbenchWindow() != null) {
	shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
	} else {
	shell = new Shell(PlatformUI.getWorkbench().getDisplay());
	}
	DateSelectionDialog dialog = new DateSelectionDialog(shell, newCalendar, DatePicker.TITLE_DIALOG,
	includeTimeOfday, selectedHourOfDay);
	pickButton.setEnabled(false);
	dateText.setEnabled(false);

	int dialogResponse = dialog.open();
	if (dialog.getDate() != null) {
	newCalendar.setTime(dialog.getDate());
	} else {
	newCalendar = null;
	}
	dateSelected(dialogResponse == Window.CANCEL, newCalendar);

	// Display display = Display.getCurrent();
	// showDatePicker((display.getCursorLocation().x),
	// (display.getCursorLocation().y));
	}
	});

	pack();
	}

	public void addPickerSelectionListener(SelectionListener listener) {
	pickerListeners.add(listener);
	}

	/**
	* must check for null return value
	*
	* @return Calendar
	*/
	public Calendar getDate() {
	return date;
	}

	@Override
	public void setBackground(Color backgroundColor) {
	dateText.setBackground(backgroundColor);
	pickButton.setBackground(backgroundColor);
	super.setBackground(backgroundColor);
	}

	public void setDate(Calendar date) {
	this.date = date;
	updateDateText();
	}

	// private void showDatePicker(int x, int y) {
	// pickerShell = new Shell(SWT.APPLICATION_MODAL);//\| SWT.ON_TOP
	// pickerShell.setText("Shell");
	// pickerShell.setLayout(new FillLayout());
	// if (date == null) {
	// date = new GregorianCalendar();
	// }
	// // datePickerPanel.setDate(date);
	// datePickerPanel = new DatePickerPanel(pickerShell, SWT.NONE, date);
	// datePickerPanel.addSelectionChangedListener(new
	// ISelectionChangedListener() {
	//
	// public void selectionChanged(SelectionChangedEvent event) {
	// if(!event.getSelection().isEmpty()) {
	// dateSelected(event.getSelection().isEmpty(),
	// ((DateSelection)event.getSelection()).getDate());
	// } else {
	// dateSelected(false, null);
	// }
	// }});
	//
	// pickerShell.setSize(new Point(240, 180));
	// pickerShell.setLocation(new Point(x, y));
	//
	// datePickerPanel.addKeyListener(new KeyListener() {
	// public void keyPressed(KeyEvent e) {
	// if (e.keyCode == SWT.ESC) {
	// dateSelected(true, null);
	// }
	// }
	//
	// public void keyReleased(KeyEvent e) {
	// }
	// });
	//
	// pickerShell.addFocusListener(new FocusListener() {
	//
	// public void focusGained(FocusEvent e) {
	//
	// }
	//
	// public void focusLost(FocusEvent e) {
	//
	// }});
	//
	// pickerShell.pack();
	// pickerShell.open();
	// }

	/** Called when the user has selected a date */
	protected void dateSelected(boolean canceled, Calendar selectedDate) {

	if (!canceled) {
	this.date = selectedDate != null ? selectedDate : null;
	updateDateText();
	notifyPickerListeners();
	}

	pickButton.setEnabled(true);
	dateText.setEnabled(true);
	}

	private void notifyPickerListeners() {
	for (SelectionListener listener : pickerListeners) {
	listener.widgetSelected(null);
	}
	}

	private void updateDateText() {
	if (date != null) {
	Date currentDate = new Date(date.getTimeInMillis());
	dateText.setText(dateFormat.format(currentDate));
	} else {
	dateText.setEnabled(false);
	dateText.setText(LABEL_CHOOSE);
	dateText.setEnabled(true);
	}
	}

	@Override
	public void setEnabled(boolean enabled) {
	dateText.setEnabled(enabled);
	pickButton.setEnabled(enabled);
	super.setEnabled(enabled);
	}

	}