bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/DateTime.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation 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:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.widgets;


 import org.eclipse.swt.internal.win32.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.events.*;
 import org.eclipse.swt.graphics.*;

 //TODO - note: locale is currently hard-coded to EN_US. This needs to be fixed.
 //TODO - features not yet implemented: setFormat (short/long?), read-only, drop-down calendar for date
 //TODO - font, colors, background image not yet implemented (works on some platforms)

 /**
  * Instances of this class are selectable user interface
  * objects that allow the user to enter and modify date
  * or time values.
  * <p>
  * Note that although this class is a subclass of <code>Composite</code>,
  * it does not make sense to add children to it, or set a layout on it.
  * </p>
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>DATE, TIME, CALENDAR</dd>
  * <dt><b>Events:</b></dt>
  * <dd>Selection</dd>
  * </dl>
  * <p>
  * Note: Only one of the styles DATE, TIME, or CALENDAR may be specified.
  * </p><p>
  * IMPORTANT: This class is <em>not</em> intended to be subclassed.
  * </p>
  *
  * @since 3.3
  */

 /* UNDER DEVELOPMENT - DO NOT USE */
 /*public*/ class DateTime extends Composite {
 	static final int DateTimeProc;
 	static final TCHAR DateTimeClass = new TCHAR (0, OS.DATETIMEPICK_CLASS, true);
 	static final int CalendarProc;
 	static final TCHAR CalendarClass = new TCHAR (0, OS.MONTHCAL_CLASS, true);
 	static {
 		WNDCLASS lpWndClass = new WNDCLASS ();
 		OS.GetClassInfo (0, DateTimeClass, lpWndClass);
 		DateTimeProc = lpWndClass.lpfnWndProc;
 		OS.GetClassInfo (0, CalendarClass, lpWndClass);
 		CalendarProc = lpWndClass.lpfnWndProc;
 	}
 	static final int MARGIN = 4;

 /**
  * Constructs a new instance of this class given its parent
  * and a style value describing its behavior and appearance.
  * <p>
  * The style value is either one of the style constants defined in
  * class <code>SWT</code> which is applicable to instances of this
  * class, or must be built by <em>bitwise OR</em>'ing together
  * (that is, using the <code>int</code> "|" operator) two or more
  * of those <code>SWT</code> style constants. The class description
  * lists the style constants that are applicable to the class.
  * Style bits are also inherited from superclasses.
  * </p>
  *
  * @param parent a composite control which will be the parent of the new instance (cannot be null)
  * @param style the style of control to construct
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
  *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
  * </ul>
  *
  * @see SWT#DATE
  * @see SWT#TIME
  * @see SWT#CALENDAR
  * @see Widget#checkSubclass
  * @see Widget#getStyle
  */
 public DateTime (Composite parent, int style) {
 	super (parent, checkStyle (style));
 }

 int callWindowProc (int hwnd, int msg, int wParam, int lParam) {
 	if (handle == 0) return 0;
 	return OS.CallWindowProc (windowProc (), hwnd, msg, wParam, lParam);
 }

 static int checkStyle (int style) {
 	/*
 	* Even though it is legal to create this widget
 	* with scroll bars, they serve no useful purpose
 	* because they do not automatically scroll the
 	* widget's client area.  The fix is to clear
 	* the SWT style.
 	*/
 	style &= ~(SWT.H_SCROLL | SWT.V_SCROLL);
 	return checkBits (style, SWT.DATE, SWT.TIME, SWT.CALENDAR, 0, 0, 0);
 }

 protected void checkSubclass () {
 	if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
 }

 /**
  * Adds the listener to the collection of listeners who will
  * be notified when the control is selected, by sending
  * it one of the messages defined in the <code>SelectionListener</code>
  * interface.
  * <p>
  * <code>widgetSelected</code> is called when the control's value changes.
  * <code>widgetDefaultSelected</code> is not called.
  * </p>
  *
  * @param listener the listener which should be notified
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  *
  * @see SelectionListener
  * @see #removeSelectionListener
  * @see SelectionEvent
  */
 public void addSelectionListener (SelectionListener listener) {
 	checkWidget ();
 	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
 	TypedListener typedListener = new TypedListener (listener);
 	addListener (SWT.Selection, typedListener);
 	addListener (SWT.DefaultSelection, typedListener);
 }

 public Point computeSize (int wHint, int hHint, boolean changed) {
 	checkWidget ();
 	int width = 0, height = 0;
 	if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) {
 		if ((style & SWT.CALENDAR) != 0) {
 			RECT rect = new RECT ();
 			OS.SendMessage(handle, OS.MCM_GETMINREQRECT, 0, rect);
 			width = rect.right;
 			height = rect.bottom;
 		} else {
 			int newFont, oldFont = 0;
 			int hDC = OS.GetDC (handle);
 			newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0);
 			if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont);
 			TEXTMETRIC tm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW () : new TEXTMETRICA ();
 			OS.GetTextMetrics (hDC, tm);
 			height = tm.tmHeight;
 			int upDownHeight = OS.GetSystemMetrics (OS.SM_CYVSCROLL);
 			height = Math.max (height, upDownHeight);
 			String string = "00/00/0000"; // TODO: take locale and format into account
 			if ((style & SWT.TIME) != 0) string = "00:00:00 AM";
 			RECT rect = new RECT ();
 			TCHAR buffer = new TCHAR (getCodePage (), string, false);
 			int flags = OS.DT_CALCRECT | OS.DT_EDITCONTROL | OS.DT_NOPREFIX;
 			OS.DrawText (hDC, buffer, buffer.length (), rect, flags);
 			width = rect.right - rect.left;
 			if (newFont != 0) OS.SelectObject (hDC, oldFont);
 			OS.ReleaseDC (handle, hDC);
 			int upDownWidth = OS.GetSystemMetrics (OS.SM_CXVSCROLL);
 			width += upDownWidth + MARGIN;
 			// TODO: On Vista, can send DTM_GETDATETIMEPICKERINFO to ask the Edit control what its margins are
 		}
 	}
 	if (width == 0) width = DEFAULT_WIDTH;
 	if (height == 0) height = DEFAULT_HEIGHT;
 	if (wHint != SWT.DEFAULT) width = wHint;
 	if (hHint != SWT.DEFAULT) height = hHint;
 	int border = getBorderWidth ();
 	width += border * 2; height += border * 2;
 	return new Point (width, height);
 }

 void createHandle () {
 	super.createHandle ();
 	state &= ~(CANVAS | THEME_BACKGROUND);
 }

 int defaultBackground () {
 	return OS.GetSysColor (OS.COLOR_WINDOW);
 }

 /**
  * Returns the receiver's date, or day of the month.
  * <p>
  * The first day of the month is 1, and the last day depends on the month and year.
  * </p>
  *
  * @return a positive integer beginning with 1
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public int getDay () {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	return systime.wDay;
 }

 /**
  * Returns the receiver's hour.
  * <p>
  * The hour is an integer between 0 and 23.
  * </p>
  *
  * @return an integer between 0 and 23
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public int getHour () {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	return systime.wHour;
 }

 /**
  * Returns the receiver's minute.
  * <p>
  * The minute is an integer between 0 and 59.
  * </p>
  *
  * @return an integer between 0 and 59
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public int getMinute () {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	return systime.wMinute;
 }

 /**
  * Returns the receiver's month.
  * <p>
  * The first month of the year is 1, and the last month is 12.
  * </p>
  *
  * @return an integer between 1 and 12
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public int getMonth () {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	return systime.wMonth;
 }

 String getNameText () {
 	return "DateTime";
 }

 /**
  * Returns the receiver's second.
  * <p>
  * The second is an integer between 0 and 59.
  * </p>
  *
  * @return an integer between 0 and 59
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public int getSecond () {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	return systime.wSecond;
 }

 /**
  * Returns the receiver's year.
  * <p>
  * The first year is 1752 and the last year is 9999.
  * </p>
  *
  * @return an integer between 1752 and 9999
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public int getYear () {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	return systime.wYear;
 }

 /**
  * Removes the listener from the collection of listeners who will
  * be notified when the control is selected.
  *
  * @param listener the listener which should no longer be notified
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  *
  * @see SelectionListener
  * @see #addSelectionListener
  */
 public void removeSelectionListener (SelectionListener listener) {
 	checkWidget ();
 	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
 	if (eventTable == null) return;
 	eventTable.unhook (SWT.Selection, listener);
 	eventTable.unhook (SWT.DefaultSelection, listener);
 }

 /**
  * Sets the receiver's date, or day of the month, to the specified day.
  * <p>
  * The first day of the month is 1, and the last day depends on the month and year.
  * </p>
  *
  * @param day a positive integer beginning with 1
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setDay (int day) {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
 	systime.wDay = (short)day;
 	OS.SendMessage (handle, msg, 0, systime);
 }

 /**
  * Sets the receiver's hour to the specified hour.
  * <p>
  * The hour is an integer between 0 and 23.
  * </p>
  *
  * @param hour an integer between 0 and 23
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setHour (int hour) {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
 	systime.wHour = (short)hour;
 	OS.SendMessage (handle, msg, 0, systime);
 }

 /**
  * Sets the receiver's minute.
  * <p>
  * The minute is an integer between 0 and 59.
  * </p>
  *
  * @param minute an integer between 0 and 59
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setMinute (int minute) {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
 	systime.wMinute = (short)minute;
 	OS.SendMessage (handle, msg, 0, systime);
 }

 /**
  * Sets the receiver's month.
  * <p>
  * The first month of the year is 1, and the last month is 12.
  * </p>
  *
  * @param month an integer between 1 and 12
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setMonth (int month) {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
 	systime.wMonth = (short)month;
 	OS.SendMessage (handle, msg, 0, systime);
 }

 /**
  * Sets the receiver's second.
  * <p>
  * The second is an integer between 0 and 59.
  * </p>
  *
  * @param second an integer between 0 and 59
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setSecond (int second) {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
 	systime.wSecond = (short)second;
 	OS.SendMessage (handle, msg, 0, systime);
 }

 /**
  * Sets the receiver's year.
  * <p>
  * The first year is 1752 and the last year is 9999.
  * </p>
  *
  * @param year an integer between 1752 and 9999
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setYear (int year) {
 	checkWidget ();
 	SYSTEMTIME systime = new SYSTEMTIME ();
 	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
 	OS.SendMessage (handle, msg, 0, systime);
 	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
 	systime.wYear = (short)year;
 	OS.SendMessage (handle, msg, 0, systime);
 }

 int widgetStyle () {
 	int bits = super.widgetStyle () | OS.WS_TABSTOP;
 	if ((style & SWT.CALENDAR) != 0) return bits;
 	/*
 	* Bug in Windows: When WS_CLIPCHILDREN is set in a
 	* Date and Time Picker, the widget draws on top of
 	* the updown control. The fix is to clear the bits.
 	*/
 	bits &= ~OS.WS_CLIPCHILDREN;
 	if ((style & SWT.TIME) != 0) bits |= OS.DTS_TIMEFORMAT;
 	if ((style & SWT.DATE) != 0) bits |= OS.DTS_SHORTDATECENTURYFORMAT | OS.DTS_UPDOWN;
 	return bits;
 }

 TCHAR windowClass () {
 	return (style & SWT.CALENDAR) != 0 ? CalendarClass : DateTimeClass;
 }

 int windowProc () {
 	return (style & SWT.CALENDAR) != 0 ? CalendarProc : DateTimeProc;
 }

 LRESULT wmNotifyChild (NMHDR hdr, int wParam, int lParam) {
 	switch (hdr.code) {
 		case OS.MCN_SELCHANGE: //SENT WHEN YOU SET IT?
 		case OS.DTN_DATETIMECHANGE:
 			sendEvent (SWT.Selection);
 			break;
 	}
 	return super.wmNotifyChild (hdr, wParam, lParam);
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2006 IBM Corporation 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:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.widgets;


	import org.eclipse.swt.internal.win32.*;
	import org.eclipse.swt.*;
	import org.eclipse.swt.events.*;
	import org.eclipse.swt.graphics.*;

	//TODO - note: locale is currently hard-coded to EN_US. This needs to be fixed.
	//TODO - features not yet implemented: setFormat (short/long?), read-only, drop-down calendar for date
	//TODO - font, colors, background image not yet implemented (works on some platforms)

	/**
	* Instances of this class are selectable user interface
	* objects that allow the user to enter and modify date
	* or time values.
	* <p>
	* Note that although this class is a subclass of <code>Composite</code>,
	* it does not make sense to add children to it, or set a layout on it.
	* </p>
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>DATE, TIME, CALENDAR</dd>
	* <dt><b>Events:</b></dt>
	* <dd>Selection</dd>
	* </dl>
	* <p>
	* Note: Only one of the styles DATE, TIME, or CALENDAR may be specified.
	* </p><p>
	* IMPORTANT: This class is <em>not</em> intended to be subclassed.
	* </p>
	*
	* @since 3.3
	*/

	/* UNDER DEVELOPMENT - DO NOT USE */
	/public/ class DateTime extends Composite {
	static final int DateTimeProc;
	static final TCHAR DateTimeClass = new TCHAR (0, OS.DATETIMEPICK_CLASS, true);
	static final int CalendarProc;
	static final TCHAR CalendarClass = new TCHAR (0, OS.MONTHCAL_CLASS, true);
	static {
	WNDCLASS lpWndClass = new WNDCLASS ();
	OS.GetClassInfo (0, DateTimeClass, lpWndClass);
	DateTimeProc = lpWndClass.lpfnWndProc;
	OS.GetClassInfo (0, CalendarClass, lpWndClass);
	CalendarProc = lpWndClass.lpfnWndProc;
	}
	static final int MARGIN = 4;

	/**
	* Constructs a new instance of this class given its parent
	* and a style value describing its behavior and appearance.
	* <p>
	* The style value is either one of the style constants defined in
	* class <code>SWT</code> which is applicable to instances of this
	* class, or must be built by <em>bitwise OR</em>'ing together
	* (that is, using the <code>int</code> "\|" operator) two or more
	* of those <code>SWT</code> style constants. The class description
	* lists the style constants that are applicable to the class.
	* Style bits are also inherited from superclasses.
	* </p>
	*
	* @param parent a composite control which will be the parent of the new instance (cannot be null)
	* @param style the style of control to construct
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
	* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
	* </ul>
	*
	* @see SWT#DATE
	* @see SWT#TIME
	* @see SWT#CALENDAR
	* @see Widget#checkSubclass
	* @see Widget#getStyle
	*/
	public DateTime (Composite parent, int style) {
	super (parent, checkStyle (style));
	}

	int callWindowProc (int hwnd, int msg, int wParam, int lParam) {
	if (handle == 0) return 0;
	return OS.CallWindowProc (windowProc (), hwnd, msg, wParam, lParam);
	}

	static int checkStyle (int style) {
	/*
	* Even though it is legal to create this widget
	* with scroll bars, they serve no useful purpose
	* because they do not automatically scroll the
	* widget's client area. The fix is to clear
	* the SWT style.
	*/
	style &= ~(SWT.H_SCROLL \| SWT.V_SCROLL);
	return checkBits (style, SWT.DATE, SWT.TIME, SWT.CALENDAR, 0, 0, 0);
	}

	protected void checkSubclass () {
	if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
	}

	/**
	* Adds the listener to the collection of listeners who will
	* be notified when the control is selected, by sending
	* it one of the messages defined in the <code>SelectionListener</code>
	* interface.
	* <p>
	* <code>widgetSelected</code> is called when the control's value changes.
	* <code>widgetDefaultSelected</code> is not called.
	* </p>
	*
	* @param listener the listener which should be notified
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*
	* @see SelectionListener
	* @see #removeSelectionListener
	* @see SelectionEvent
	*/
	public void addSelectionListener (SelectionListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	TypedListener typedListener = new TypedListener (listener);
	addListener (SWT.Selection, typedListener);
	addListener (SWT.DefaultSelection, typedListener);
	}

	public Point computeSize (int wHint, int hHint, boolean changed) {
	checkWidget ();
	int width = 0, height = 0;
	if (wHint == SWT.DEFAULT \|\| hHint == SWT.DEFAULT) {
	if ((style & SWT.CALENDAR) != 0) {
	RECT rect = new RECT ();
	OS.SendMessage(handle, OS.MCM_GETMINREQRECT, 0, rect);
	width = rect.right;
	height = rect.bottom;
	} else {
	int newFont, oldFont = 0;
	int hDC = OS.GetDC (handle);
	newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0);
	if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont);
	TEXTMETRIC tm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW () : new TEXTMETRICA ();
	OS.GetTextMetrics (hDC, tm);
	height = tm.tmHeight;
	int upDownHeight = OS.GetSystemMetrics (OS.SM_CYVSCROLL);
	height = Math.max (height, upDownHeight);
	String string = "00/00/0000"; // TODO: take locale and format into account
	if ((style & SWT.TIME) != 0) string = "00:00:00 AM";
	RECT rect = new RECT ();
	TCHAR buffer = new TCHAR (getCodePage (), string, false);
	int flags = OS.DT_CALCRECT \| OS.DT_EDITCONTROL \| OS.DT_NOPREFIX;
	OS.DrawText (hDC, buffer, buffer.length (), rect, flags);
	width = rect.right - rect.left;
	if (newFont != 0) OS.SelectObject (hDC, oldFont);
	OS.ReleaseDC (handle, hDC);
	int upDownWidth = OS.GetSystemMetrics (OS.SM_CXVSCROLL);
	width += upDownWidth + MARGIN;
	// TODO: On Vista, can send DTM_GETDATETIMEPICKERINFO to ask the Edit control what its margins are
	}
	}
	if (width == 0) width = DEFAULT_WIDTH;
	if (height == 0) height = DEFAULT_HEIGHT;
	if (wHint != SWT.DEFAULT) width = wHint;
	if (hHint != SWT.DEFAULT) height = hHint;
	int border = getBorderWidth ();
	width += border * 2; height += border * 2;
	return new Point (width, height);
	}

	void createHandle () {
	super.createHandle ();
	state &= ~(CANVAS \| THEME_BACKGROUND);
	}

	int defaultBackground () {
	return OS.GetSysColor (OS.COLOR_WINDOW);
	}

	/**
	* Returns the receiver's date, or day of the month.
	* <p>
	* The first day of the month is 1, and the last day depends on the month and year.
	* </p>
	*
	* @return a positive integer beginning with 1
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public int getDay () {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	return systime.wDay;
	}

	/**
	* Returns the receiver's hour.
	* <p>
	* The hour is an integer between 0 and 23.
	* </p>
	*
	* @return an integer between 0 and 23
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public int getHour () {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	return systime.wHour;
	}

	/**
	* Returns the receiver's minute.
	* <p>
	* The minute is an integer between 0 and 59.
	* </p>
	*
	* @return an integer between 0 and 59
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public int getMinute () {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	return systime.wMinute;
	}

	/**
	* Returns the receiver's month.
	* <p>
	* The first month of the year is 1, and the last month is 12.
	* </p>
	*
	* @return an integer between 1 and 12
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public int getMonth () {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	return systime.wMonth;
	}

	String getNameText () {
	return "DateTime";
	}

	/**
	* Returns the receiver's second.
	* <p>
	* The second is an integer between 0 and 59.
	* </p>
	*
	* @return an integer between 0 and 59
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public int getSecond () {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	return systime.wSecond;
	}

	/**
	* Returns the receiver's year.
	* <p>
	* The first year is 1752 and the last year is 9999.
	* </p>
	*
	* @return an integer between 1752 and 9999
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public int getYear () {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	return systime.wYear;
	}

	/**
	* Removes the listener from the collection of listeners who will
	* be notified when the control is selected.
	*
	* @param listener the listener which should no longer be notified
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*
	* @see SelectionListener
	* @see #addSelectionListener
	*/
	public void removeSelectionListener (SelectionListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (eventTable == null) return;
	eventTable.unhook (SWT.Selection, listener);
	eventTable.unhook (SWT.DefaultSelection, listener);
	}

	/**
	* Sets the receiver's date, or day of the month, to the specified day.
	* <p>
	* The first day of the month is 1, and the last day depends on the month and year.
	* </p>
	*
	* @param day a positive integer beginning with 1
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setDay (int day) {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
	systime.wDay = (short)day;
	OS.SendMessage (handle, msg, 0, systime);
	}

	/**
	* Sets the receiver's hour to the specified hour.
	* <p>
	* The hour is an integer between 0 and 23.
	* </p>
	*
	* @param hour an integer between 0 and 23
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setHour (int hour) {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
	systime.wHour = (short)hour;
	OS.SendMessage (handle, msg, 0, systime);
	}

	/**
	* Sets the receiver's minute.
	* <p>
	* The minute is an integer between 0 and 59.
	* </p>
	*
	* @param minute an integer between 0 and 59
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setMinute (int minute) {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
	systime.wMinute = (short)minute;
	OS.SendMessage (handle, msg, 0, systime);
	}

	/**
	* Sets the receiver's month.
	* <p>
	* The first month of the year is 1, and the last month is 12.
	* </p>
	*
	* @param month an integer between 1 and 12
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setMonth (int month) {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
	systime.wMonth = (short)month;
	OS.SendMessage (handle, msg, 0, systime);
	}

	/**
	* Sets the receiver's second.
	* <p>
	* The second is an integer between 0 and 59.
	* </p>
	*
	* @param second an integer between 0 and 59
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setSecond (int second) {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
	systime.wSecond = (short)second;
	OS.SendMessage (handle, msg, 0, systime);
	}

	/**
	* Sets the receiver's year.
	* <p>
	* The first year is 1752 and the last year is 9999.
	* </p>
	*
	* @param year an integer between 1752 and 9999
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setYear (int year) {
	checkWidget ();
	SYSTEMTIME systime = new SYSTEMTIME ();
	int msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_GETCURSEL : OS.DTM_GETSYSTEMTIME;
	OS.SendMessage (handle, msg, 0, systime);
	msg = (style & SWT.CALENDAR) != 0 ? OS.MCM_SETCURSEL : OS.DTM_SETSYSTEMTIME;
	systime.wYear = (short)year;
	OS.SendMessage (handle, msg, 0, systime);
	}

	int widgetStyle () {
	int bits = super.widgetStyle () \| OS.WS_TABSTOP;
	if ((style & SWT.CALENDAR) != 0) return bits;
	/*
	* Bug in Windows: When WS_CLIPCHILDREN is set in a
	* Date and Time Picker, the widget draws on top of
	* the updown control. The fix is to clear the bits.
	*/
	bits &= ~OS.WS_CLIPCHILDREN;
	if ((style & SWT.TIME) != 0) bits \|= OS.DTS_TIMEFORMAT;
	if ((style & SWT.DATE) != 0) bits \|= OS.DTS_SHORTDATECENTURYFORMAT \| OS.DTS_UPDOWN;
	return bits;
	}

	TCHAR windowClass () {
	return (style & SWT.CALENDAR) != 0 ? CalendarClass : DateTimeClass;
	}

	int windowProc () {
	return (style & SWT.CALENDAR) != 0 ? CalendarProc : DateTimeProc;
	}

	LRESULT wmNotifyChild (NMHDR hdr, int wParam, int lParam) {
	switch (hdr.code) {
	case OS.MCN_SELCHANGE: //SENT WHEN YOU SET IT?
	case OS.DTN_DATETIMECHANGE:
	sendEvent (SWT.Selection);
	break;
	}
	return super.wmNotifyChild (hdr, wParam, lParam);
	}
	}